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diff --git a/Master/xemtex/doc/ghostscript/History2.htm b/Master/xemtex/doc/ghostscript/History2.htm deleted file mode 100644 index 62964ee41af..00000000000 --- a/Master/xemtex/doc/ghostscript/History2.htm +++ /dev/null @@ -1,5231 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> -<html> -<head> -<title>History of Ghostscript versions 1.n</title> -<!-- $Id: History2.htm,v 1.13.2.11.2.6 2003/05/17 14:38:59 giles Exp $ --> -<!-- Originally: history2.txt --> -<!-- - WARNING: do not use Pete Kaiser's emacs function "gs-toc" alone to - re-create the table of contents here, because it will replace the - hand-edited TOC subheads with a separate subhead for each H2 in - the body of the file. Or if you do, first look at the original - TOC to see how to edit it for visual conciseness. ---> -<link rel="stylesheet" type="text/css" href="gs.css" title="Ghostscript Style"> -</head> - -<body> -<!-- [1.0 begin visible header] ============================================ --> - -<!-- [1.1 begin headline] ================================================== --> - -<h1>History of Ghostscript versions 2.n</h1> - -<!-- [1.1 end headline] ==================================================== --> - -<!-- [1.2 begin table of contents] ========================================= --> - -<h2>Table of contents</h2> - -<blockquote><ul> -<li><a href="#Version2.9.10b">Version 2.9.10-beta (7/28/94)</a> -<ul> -<li><a href="#V2.9.10b_Documentation">Documentation</a>, - <a href="#V2.9.10b_Procedures">Procedures</a>, - <a href="#V2.9.10b_Utilities">Utilities</a>, - <a href="#V2.9.10b_Drivers">Drivers</a>, - <a href="#V2.9.10b_Platforms">Platforms</a>, - <a href="#V2.9.10b_Fonts">Fonts</a>, - <a href="#V2.9.10b_Interpreter">Interpreter</a>, - <a href="#V2.9.10b_Streams">Streams</a>, - <a href="#V2.9.10b_Library">Library</a> -</ul> -<li><a href="#Version2.9.9b">Version 2.9.9-beta (6/23/94)</a> -<ul> -<li><a href="#V2.9.9b_Documentation">Documentation</a>, - <a href="#V2.9.9b_Platforms">Platforms</a>, - <a href="#V2.9.9b_Fonts">Fonts</a>, - <a href="#V2.9.9b_Interpreter">Interpreter</a>, - <a href="#V2.9.9b_Library">Library</a> -</ul> -<li><a href="#Version2.9.8">Version 2.9.8 (6/20/94)</a> -<ul> -<li><a href="#V2.9.8_Documentation">Documentation</a>, - <a href="#V2.9.8_Procedures">Procedures</a>, - <a href="#V2.9.8_Utilities">Utilities</a>, - <a href="#V2.9.8_Drivers">Drivers</a>, - <a href="#V2.9.8_Platforms">Platforms</a>, - <a href="#V2.9.8_Fonts">Fonts</a>, - <a href="#V2.9.8_Interpreter">Interpreter</a>, - <a href="#V2.9.8_Library">Library</a> -</ul> -<li><a href="#Version2.9.7b">Version 2.9.7-beta (6/5/94)</a> -<ul> -<li><a href="#V2.9.7b_Documentation">Documentation</a>, - <a href="#V2.9.7b_Procedures">Procedures</a>, - <a href="#V2.9.7b_Utilities">Utilities</a>, - <a href="#V2.9.7b_Drivers">Drivers</a>, - <a href="#V2.9.7b_Platforms">Platforms</a>, - <a href="#V2.9.7b_Fonts">Fonts</a>, - <a href="#V2.9.7b_Interpreter">Interpreter</a>, - <a href="#V2.9.7b_Library">Library</a> -</ul> -<li><a href="#Version2.9.6b">Version 2.9.6-beta (5/23/94, not distributed to the public)</a> -<ul> -<li><a href="#V2.9.6b_Documentation">Documentation</a>, - <a href="#V2.9.6b_Procedures">Procedures</a>, - <a href="#V2.9.6b_Utilities">Utilities</a>, - <a href="#V2.9.6b_Drivers">Drivers</a>, - <a href="#V2.9.6b_Platforms">Platforms</a>, - <a href="#V2.9.6b_Fonts">Fonts</a>, - <a href="#V2.9.6b_Interpreter">Interpreter</a>, - <a href="#V2.9.6b_Library">Library</a> -</ul> -<li><a href="#Version2.9.5b">Version 2.9.5-beta (4/11/94)</a> -<ul> -<li><a href="#V2.9.5b_Documentation">Documentation</a>, - <a href="#V2.9.5b_Procedures">Procedures</a>, - <a href="#V2.9.5b_Utilities">Utilities</a>, - <a href="#V2.9.5b_Drivers">Drivers</a>, - <a href="#V2.9.5b_Platforms">Platforms</a>, - <a href="#V2.9.5b_Interpreter">Interpreter</a>, - <a href="#V2.9.5b_Library">Library</a> -</ul> -<li><a href="#Version2.9.4b">Version 2.9.4-beta (2/19/94)</a> -<ul> -<li><a href="#V2.9.4b_Procedures">Procedures</a>, - <a href="#V2.9.4b_Utilities">Utilities</a>, - <a href="#V2.9.4b_Drivers">Drivers</a>, - <a href="#V2.9.4b_Platforms">Platforms</a>, - <a href="#V2.9.4b_Interpreter">Interpreter</a>, - <a href="#V2.9.4b_Library">Library</a> -</ul> -<li><a href="#Version2.9.3b">Version 2.9.3-beta (1/19/94)</a> -<ul> -<li><a href="#V2.9.3b_Documentation">Documentation</a>, - <a href="#V2.9.3b_Procedures">Procedures</a>, - <a href="#V2.9.3b_Drivers">Drivers</a>, - <a href="#V2.9.3b_Platforms">Platforms</a>, - <a href="#V2.9.3b_Interpreter">Interpreter</a>, - <a href="#V2.9.3b_Library">Library</a> -</ul> -<li><a href="#Version2.9.2b">Version 2.9.2-beta (1/2/94)</a> -<ul> -<li><a href="#V2.9.2b_Documentation">Documentation</a>, - <a href="#V2.9.2b_Utilities">Utilities</a>, - <a href="#V2.9.2b_Drivers">Drivers</a>, - <a href="#V2.9.2b_Platforms">Platforms</a>, - <a href="#V2.9.2b_Fonts">Fonts</a>, - <a href="#V2.9.2b_Interpreter">Interpreter</a>, - <a href="#V2.9.2b_Library">Library</a> -</ul> -<li><a href="#Version2.9.1b">Version 2.9.1-beta (12/7/93)</a> -<ul> -<li><a href="#V2.9.1b_Utilities">Utilities</a>, - <a href="#V2.9.1b_Interpreter">Interpreter</a>, - <a href="#V2.9.1b_Library">Library</a> -</ul> -<li><a href="#Version2.9b">Version 2.9-beta (12/6/93)</a> -<ul> -<li><a href="#V2.9b_Documentation">Documentation</a>, - <a href="#V2.9b_Procedures">Procedures</a>, - <a href="#V2.9b_Utilities">Utilities</a>, - <a href="#V2.9b_Drivers">Drivers</a>, - <a href="#V2.9b_Platforms">Platforms</a>, - <a href="#V2.9b_Interpreter">Interpreter</a>, - <a href="#V2.9b_Library">Library</a> -</ul> -<li><a href="#Version2.8b">Version 2.8-beta (11/10/93)</a> -<ul> -<li><a href="#V2.8b_Documentation">Documentation</a>, - <a href="#V2.8b_Procedures">Procedures</a>, - <a href="#V2.8b_Utilities">Utilities</a>, - <a href="#V2.8b_Drivers">Drivers</a>, - <a href="#V2.8b_Platforms">Platforms</a>, - <a href="#V2.8b_Fonts">Fonts</a>, - <a href="#V2.8b_Interpreter">Interpreter</a>, - <a href="#V2.8b_Library">Library</a> -</ul> -<li><a href="#Version2.7.2b">Version 2.7.2-beta (10/11/93)</a> -<ul> -<li><a href="#V2.7.2b_Utilities">Utilities</a>, - <a href="#V2.7.2b_Interpreter">Interpreter</a>, - <a href="#V2.7.2b_Library">Library</a> -</ul> -<li><a href="#Version2.7.1b">Version 2.7.1-beta (10/4/93, not distributed to the public)</a> -<ul> -<li><a href="#V2.7.1b_Documentation">Documentation</a>, - <a href="#V2.7.1b_Utilities">Utilities</a>, - <a href="#V2.7.1b_Drivers">Drivers</a>, - <a href="#V2.7.1b_Platforms">Platforms</a>, - <a href="#V2.7.1b_Fonts">Fonts</a>, - <a href="#V2.7.1b_Interpreter">Interpreter</a>, - <a href="#V2.7.1b_Library">Library</a> -</ul> -<li><a href="#Version2.7b">Version 2.7-beta (9/20/93, not distributed to the public)</a> -<ul> -<li><a href="#V2.7b_Documentation">Documentation</a>, - <a href="#V2.7b_Procedures">Procedures</a>, - <a href="#V2.7b_Utilities">Utilities</a>, - <a href="#V2.7b_Drivers">Drivers</a>, - <a href="#V2.7b_Platforms">Platforms</a>, - <a href="#V2.7b_Fonts">Fonts</a>, - <a href="#V2.7b_Interpreter">Interpreter</a>, - <a href="#V2.7b_Library">Library</a> -</ul> -<li><a href="#Version2.6.1">Version 2.6.1 (5/28/93)</a> -<ul> -<li><a href="#V2.6.1_Documentation">Documentation</a>, - <a href="#V2.6.1_Procedures">Procedures</a>, - <a href="#V2.6.1_Utilities">Utilities</a>, - <a href="#V2.6.1_Drivers">Drivers</a>, - <a href="#V2.6.1_Platforms">Platforms</a>, - <a href="#V2.6.1_Fonts">Fonts</a>, - <a href="#V2.6.1_Interpreter">Interpreter</a>, - <a href="#V2.6.1_Library">Library</a> -</ul> -<li><a href="#Version2.6">Version 2.6 (5/9/93)</a> -<ul> -<li><a href="#V2.6_Documentation">Documentation</a>, - <a href="#V2.6_Procedures">Procedures</a>, - <a href="#V2.6_Utilities">Utilities</a>, - <a href="#V2.6_Platforms">Platforms</a>, - <a href="#V2.6_Fonts">Fonts</a>, - <a href="#V2.6_Drivers">Drivers</a>, - <a href="#V2.6_Interpreter">Interpreter</a>, - <a href="#V2.6_Library">Library</a> -</ul> -<li><a href="#Version2.5.2">Version 2.5.2 (9/20/92)</a> -<ul> -<li><a href="#V2.5.2_Procedures">Procedures</a>, - <a href="#V2.5.2_Utilities">Utilities</a>, - <a href="#V2.5.2_Platforms">Platforms</a>, - <a href="#V2.5.2_Drivers">Drivers</a>, - <a href="#V2.5.2_Interpreter">Interpreter</a>, - <a href="#V2.5.2_Library">Library</a> -</ul> -<li><a href="#Version2.5.1">Version 2.5.1 (9/11/92)</a> -<ul> -<li><a href="#V2.5.1_Procedures">Procedures</a>, - <a href="#V2.5.1_Utilities">Utilities</a>, - <a href="#V2.5.1_Platforms">Platforms</a>, - <a href="#V2.5.1_Fonts">Fonts</a>, - <a href="#V2.5.1_Drivers">Drivers</a>, - <a href="#V2.5.1_Interpreter">Interpreter</a>, - <a href="#V2.5.1_Library">Library</a> -</ul> -<li><a href="#Version2.5">Version 2.5 (8/18/92)</a> -<ul> -<li><a href="#V2.5_Procedures">Procedures</a>, - <a href="#V2.5_Utilities">Utilities</a>, - <a href="#V2.5_Platforms">Platforms</a>, - <a href="#V2.5_Fonts">Fonts</a>, - <a href="#V2.5_Drivers">Drivers</a>, - <a href="#V2.5_Interpreter">Interpreter</a>, - <a href="#V2.5_Library">Library</a> -</ul> -<li><a href="#Version2.4.2">Version 2.4.2 (5/8/92)</a> -<ul> -<li><a href="#V2.4.2_Procedures">Procedures</a>, - <a href="#V2.4.2_Utilities">Utilities</a>, - <a href="#V2.4.2_Platforms">Platforms</a>, - <a href="#V2.4.2_Fonts">Fonts</a>, - <a href="#V2.4.2_Drivers">Drivers</a>, - <a href="#V2.4.2_Interpreter">Interpreter</a>, - <a href="#V2.4.2_Library">Library</a> -</ul> -<li><a href="#Version2.4.1">Version 2.4.1 (4/21/92)</a> -<ul> -<li><a href="#V2.4.1_Procedures">Procedures</a>, - <a href="#V2.4.1_Utilities">Utilities</a>, - <a href="#V2.4.1_Drivers">Drivers</a>, - <a href="#V2.4.1_Fonts">Fonts</a>, - <a href="#V2.4.1_Interpreter">Interpreter</a>, - <a href="#V2.4.1_Library">Library</a> -</ul> -<li><a href="#Version2.4">Version 2.4 (3/25/92)</a> -<ul> -<li><a href="#V2.4_Procedures">Procedures</a>, - <a href="#V2.4_Utilities">Utilities</a>, - <a href="#V2.4_Drivers">Drivers</a>, - <a href="#V2.4_Fonts">Fonts</a>, - <a href="#V2.4_Interpreter">Interpreter</a>, - <a href="#V2.4_Library">Library</a> -</ul> -<li><a href="#Version2.3">Version 2.3 (8/28/91)</a> -<ul> -<li><a href="#V2.3_Utilities">Utilities</a>, - <a href="#V2.3_Drivers">Drivers</a> -</ul> -<li><a href="#Version2.2">Version 2.2 (6/1/91)</a> -<ul> -<li><a href="#V2.2_Procedures">Procedures</a>, - <a href="#V2.2_Drivers">Drivers</a>, - <a href="#V2.2_Fonts">Fonts</a>, - <a href="#V2.2_Utilities">Utilities</a>, - <a href="#V2.2_Interpreter">Interpreter</a>, - <a href="#V2.2_Library">Library</a> -</ul> -<li><a href="#Version2.1.1">Version 2.1.1 (1/15/91)</a> -<ul> -<li><a href="#V2.1.1_Build_procedures">Build procedures</a>, - <a href="#V2.1.1_Interpreter">Interpreter</a>, - <a href="#V2.1.1_Drivers">Drivers</a>, - <a href="#V2.1.1_Library">Library</a> -</ul> -<li><a href="#Version2.1">Version 2.1 (12/31/90)</a> -<ul> -<li><a href="#V2.1_Build_procedures">Build procedures</a>, - <a href="#V2.1_Drivers">Drivers</a>, - <a href="#V2.1_Fonts">Fonts</a>, - <a href="#V2.1_Interpreter">Interpreter</a>, - <a href="#V2.1_Library">Library</a> -</ul> -<li><a href="#Version2.0">Version 2.0 (9/12/90)</a> -<ul> -<li><a href="#V2.0_Miscellaneous">Miscellaneous</a>, - <a href="#V2.0_Drivers">Drivers</a>, - <a href="#V2.0_Build_procedures">Build procedures</a>, - <a href="#V2.0_Interpreter">Interpreter</a>, - <a href="#V2.0_Library">Library</a> -</ul> -</ul></blockquote> - -<!-- [1.2 end table of contents] =========================================== --> - -<!-- [1.3 begin hint] ====================================================== --> - -<p> -This document is a history of Ghostscript releases numbered 2.n. For more -recent changes, see the the other history documents and, for the latest -versions, the new: - -<blockquote> -<a href="News.htm">News</a><br> -<a href="History4.htm">History of Ghostscript versions 4.n</a><br> -<a href="History3.htm">History of Ghostscript versions 3.n</a><br> -History of Ghostscript versions 2.n (this document)<br> -<a href="History1.htm">History of Ghostscript versions 1.n</a> -</blockquote> - -<p>For other information, see the <a href="Readme.htm">Ghostscript -overview</a>. - -<!-- [1.3 end hint] ======================================================== --> - -<hr> - -<!-- [1.0 end visible header] ============================================== --> - -<h2><a name="Version2.9.10b"></a>Version 2.9.10-beta (7/28/94)</h2> - -<p> -This is the last 2.9 beta, since 3.0 will be released on July 31. - -<h3><a name="V2.9.10b_Documentation"></a>Documentation</h3><pre> -Fixes bugs: - - A | in gs.1 had a \ in front of it instead of \\. - -Adds a paragraph in gs.1 that tells how to select paper size. - -Notes in devs.mak that the cdj550 driver is the best one for the H-P -DeskJet 520, and the pjxl300 driver is the right one for the H-P DeskJet -1200C. - -Notes in make.doc that Watcom C++ 10.0 may require a change in a makefile. - -</pre><h3><a name="V2.9.10b_Procedures"></a>Procedures</h3><pre> -Removes ICCINIT from MODULES.LIS for VMS systems. - -Updates VMS.MAK to support Motif V1.2. - -Updates jpeg.mak to work with version 5alpha4 of the IJG JPEG code. - -</pre><h3><a name="V2.9.10b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - font2c didn't leave extra room in Type 0 font dictionaries for -entries added by definefont. - - font2c left extra information on the stack. - - ansi2knr would remove newline characters within formal argument -lists. - - font2c got an Error: /undefined in makefontprocname. - -Updates ansi2knr to work better with the GNU configure program. - -Updates ansi2knr to handle procedure formal arguments automatically. - -</pre><h3><a name="V2.9.10b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - If a file contained color or gray-scale information followed by a -masked image, the X driver would sometimes invert the polarity of the -image. - -</pre><h3><a name="V2.9.10b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - Unix systems with a 2-argument gettimeofday returned garbage -values for the current time. - - The VMS build script for compiled fonts omitted the requirement -to load gs_ccfnt.ps. - - memory_.h didn't note that System V Unix platforms need memmove. - -On Unix systems, changes the subdirectory of $datadir/ghostscript to just -be the version number (e.g., 2.9.10 rather than gs-2.9.9). - -</pre><h3><a name="V2.9.10b_Fonts"></a>Fonts</h3><pre> -Adds support code for the Wadalab (University of Tokyo) free Kanji font. - -Notes in the documentation in Fontmap that .pfa and .pfb fonts are -compatible with ATM, but .gsf fonts are not. - -Changes the names of Thomas Wolff's expanded Hershey fonts, replacing .gsf -with .pfa. - -</pre><h3><a name="V2.9.10b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The scanner became confused if the literal names /<< or />> -straddled an input buffer boundary. - - .setlanguagelevel gave an invalidaccess error when -switching from level 2 to level 1. - - currentgstate, setgstate, and copy for gstates didn't do -the necessary access checks. - - The Category resource category didn't define .ResourceFile, so -/Category resourcestatus gave an error. - - The garbage collector didn't trace the structures used by -filenameforall properly on most platforms. - - Automatically expanding systemdict didn't work, but didn't give -an error. - - Automatically expanding a dictionary usually expanded it by too -much. - - systemdict was created too small. - - The garbage collector didn't trace the structures referenced only -from allocator objects, leading to attempts to access freed storage. - - If a chunk was empty, the GC tried to free it even if it had -inner chunks. -* - The outer loop in dict_find_name_by_index() could cause an -addressing fault on segmented machines when looking up Level 2 operators, -because the offset could get decremented past 0. - - The heap_available procedure in gsmemory.c didn't convert -properly to non-ANSI syntax. (New bug in 2.9.9.) - - The ledgertray procedure wasn't implemented. - - The xxxtray procedures didn't set the page size. - - The settumble operator wasn't implemented, even as a dummy. - - glyphshow didn't work with Type 3 fonts. - - Supplying a RenderTable for a CIE color space caused an error. - - The DCT filter code had the jpeg/ subdirectory name "wired in" to -the source files. - -Adds experimental filters for Burrows/Wheeler block sorting compression -(BWBlockSortEncode/Decode), described in DEC SRC Research Report #124, -move-to-front coding (MoveToFrontEncode/Decode), and a simple form of -Huffman coding (BoundedHuffmanEncode/Decode). These are experimental -- do -not rely on them remaining the same (or existing at all) in future -releases! - -Adds all function prototypes needed to pacify strict compilers. - -Removes all explicit references to userdict from the C code. - -Changes the SAFER switch so that it disallows not only explicit writing, -deleting, or renaming of files, but also disallows specifying an explicit -OutputFile for any device (except for the initial device, by means of --sOutputFile= on the command line). - -</pre><h3><a name="V2.9.10b_Streams"></a>Streams</h3><pre> -Fixes bugs: - - Hex decoding (ASCIIHexDecode stream and <> literals) didn't treat -the data source as read-only (although it restored it to its original -contents). - -Implements move-to-front coding, a simple form of Huffman coding, and -Burrows/Wheeler block sorting compression. - -</pre><h3><a name="V2.9.10b_Library"></a>Library</h3><pre> -Fixes bugs: -* - (The following bug fix was actually implemented somewhere around -version 2.7.) restore didn't purge character cache entries whose keys were -names created more recently than the save. - - gstype1.h declared gs_type1_state_sizeof as an extern, but this -wasn't defined anywhere. - - gs_makeimagedevice didn't set the size of the palette correctly, -which confused the GC. - - gs_makeimagedevice didn't set num_components to 1 for -mapped-color devices with only gray values. -* - The two-color halftoning algorithms truncated when computing the -halftone level, rather than rounding it. -* - If a path being filled had line segments that fell entirely to -the right of the clipping region, part of the path might not be filled. - - The optimized code for 24-bit color didn't ensure properly that -32-bit accesses would be aligned appropriately. - - The miter join check had gotten reversed somewhere along the way. -* - Because x and y were interchanged in the miter check computation, -in some situations the check was inverted. (This is a very old bug!) - - It was believed that strokepath didn't work with dashed lines; -the problem appears to have been an incorrect testing program. - -Adds all function prototypes needed to pacify strict compilers. - -Changes fixed2float so it doesn't cast the result to float, and removes -fixed2double. This produces slightly more accurate results in many places, -and may even be faster (for FPUs that normally generate double rather than -single precision results). - -</pre> - -<h2><a name="Version2.9.9b"></a>Version 2.9.9-beta (6/23/94)</h2> - -<h3><a name="V2.9.9b_Documentation"></a>Documentation</h3><pre> -Puts a pointer to devs.mak in the section of use.doc that talks about -MS-DOS displays. - -</pre><h3><a name="V2.9.9b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The %pipe% IODevice was omitted on System V platforms. - - The AXP VMS build script needed /NESTED_INCLUDE=PRIMARY in -CC_QUAL to work around a bug in the DEC C compiler. - -</pre><h3><a name="V2.9.9b_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - gs_lev2.ps redefined .loadFontmap incorrectly. - -</pre><h3><a name="V2.9.9b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - stream_compact used memcpy even though the source and destination -might overlap. - - filter applied to a closed file could cause a crash. - -</pre><h3><a name="V2.9.9b_Library"></a>Library</h3><pre> -Fixes bugs: - - putdeviceparams to a printer didn't close and reopen the device -if only the page size or resolution was changed. - -</pre> - -<h2><a name="Version2.9.8"></a>Version 2.9.8 (6/20/94)</h2> - -<p> -This is the first version that claims to be a full Level 2 -implementation. -It was distributed to satisfy a contractual requirement. -</p> - -<h3><a name="V2.9.8_Documentation"></a>Documentation</h3><pre> -In make.doc: - - Adds a reference to the generic System V section at the end of -the SCO section. - - Notes that DEC OSF/1 systems may require changing the name of the -install program to installbsd. - -Updates drivers.doc to reflect the change from "properties" to -"parameters". - -Updates the Aladdin Enterprises Free Public License to version 1. - -In language.doc, notes that certain device parameters will be phased out. - -</pre><h3><a name="V2.9.8_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The file aa.ps was included in the distribution by mistake. - -Notes in the Unix makefiles that X11R6 probably needs SM and ICE added to -XLIBS. - -</pre><h3><a name="V2.9.8_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - viewjpeg.ps used a non-existent file as its example. - - A temporary string in wrfont.ps was allocated too small. - -Upgrades font2c.ps so it will handle (simple) Type 0 fonts as well as Type -1. - -</pre><h3><a name="V2.9.8_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The TIFF drivers didn't byte-align each scan line. - - gdevtfax.c applied & to an array member of a structure. - -Changes the param_list interface slightly: Implementations of the -put_params driver procedure should now use param_signal_error to report -errors, and should not give up at the first error. (Even though this is a -non-backward-compatible change, old implementations will continue to work; -they just won't deliver complete results to the setpagedevice Policies -machinery.) - -</pre><h3><a name="V2.9.8_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - Removes the time zone adjustment from gp_get_clock in gp_unix.c, -since the value returned by all Unix systems is bogus. - - The DV/X makefile still included the dfaxhigh and dfaxlow drivers. - - gssetmod.com (VMS command file) didn't work properly if the -argument list was empty. - - vms.mak, vms-axp.mak, and modules.lis hadn't been updated to -reflect changes in 2.9.7. - - The MS Windows version wouldn't link (overflowed the 64K primary -data segment). - -</pre><h3><a name="V2.9.8_Fonts"></a>Fonts</h3><pre> -Makes the font substitution algorithm somewhat more intelligent. - -</pre><h3><a name="V2.9.8_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - Enumerating the pointers of a zero-length array of structures -caused a divide by zero. - - iref.h didn't protect itself against multiple inclusion. - - The CCITTFaxEncode filter didn't byte-align the final -end-of-block code if EndOfBlock and EncodedByteAlign were both true. - - make_initial_dict in iinit.c used `name' as a formal parameter -name, which some compilers believe conflicts with a typedef. - - Not all internal operators had registered names. - - The GC used memcpy, rather than bytes_copy, when compacting -objects, even though the source and destination might overlap. - - When debugging was enabled, gc_string_mark could give a spurious -error indication. - - vmstatus returned too small a value for the maximum VM. - - The scanner could get into a loop when reading a radix-85 string. - - The GC could get into a state where it was called after every -allocation (because of the patch setting global = true in ireclaim). - - The general path filling algorithm didn't skip regions that were -completely outside the clipping box. - - The gs_screen_enum structure contained a pointer (porder) that -pointed into the middle of a structure, confusing the GC. - -Implements the BitmapWidths flag in fonts. The default of false means that -we use scalable widths even with xfonts. - -Changes the Generic resource category so that ResourceFileName is optional. - -Changes the .getdeviceparams operator so that it takes an optional -dictionary giving the set of keys whose values are wanted. Changes the -.putdeviceparams operator so that it takes an optional policy dictionary -specifying the action to be taken on errors, and returns a list of keys and -errors if it fails, rather than causing an error. These are -non-backward-compatible changes, but ordinary programs do not use these -operators. - -Changes the names of some internal operators and procedures by adding -a . to the beginning: - currenttime - devicename - -Implements currentpagedevice, and a small subset of setpagedevice. Only -the following keys in the page device dictionary are known to the current -implementation, and the ones marked with * are not actually processed: - PageSize - InputAttributes - MediaColor, MediaWeight, MediaType, InsertSheet - (for InputAttributes matching only) - *ImagingBBox - OutputAttributes - OutputType - (for OutputAttributes matching only) - NumCopies - HWResolution - *Margins - *Orientation (for all devices, not just roll devices) - Policies - Install - BeginPage - EndPage -Does not implement: - - Updating InputAttributes or OutputAttributes by sensing the state - of the device; - - Retrying media matching after an initial failure; - - Automatic handling of portrait vs. landscape page size; - - Recording the CTM after Install as the one to be used for - defaultmatrix, initmatrix, and initgraphics. -Also, media matching is normally disabled (with InputAttributes = null) -for all devices. ****** We had to disable setpagedevice just before -shipping this release, because of interactions with the older device -handling machinery that we could not fix in the time available. - -</pre><h3><a name="V2.9.8_Library"></a>Library</h3><pre> -Fixes bugs: - - 24-bit color (mem_true24_fill_rectangle and _copy_mono) had -algorithm bugs. - - A complex conditional expression in gx_render_gray wouldn't -compile properly with the DECStation 3100 Ultrix 4.3 compiler. - - The GC routines for gx_device_clip didn't handle the case where -the 'current' pointer pointed to list.single. - - gx_add_char_bits used memcpy, rather than bytes_copy, for -compressing character bitmaps, even though the source and destination might -overlap. - - Some compilers require the definition of st_gstate_contents to -precede the definitions of the GC procedures. - - Filling a large rectangle (more than 1K of bitmap) with a colored -halftone overwrote random areas of the stack. - -Changes gs_setcachedevice[2] to take a pointer to an array of floats, -rather than 6 or 10 individual floats. THIS IS A NON-BACKWARD-COMPATIBLE -CHANGE. - -Implements the BitmapWidths flag in fonts. - -</pre> - -<h2><a name="Version2.9.7b"></a>Version 2.9.7-beta (6/5/94)</h2> - -<p> -Yet another pre-3.0 beta. The main features are a fairly reliable -garbage -collector, and function prototypes almost everywhere they are needed. - -<h3><a name="V2.9.7b_Documentation"></a>Documentation</h3><pre> -Fixes bugs: - - The comment at the beginning of the zfindlibfile procedure was -incorrect. - -Replaces the GNU License (the COPYING file) with version 0 of the new -Aladdin Enterprises Free Public License (the PUBLIC file). - -</pre><h3><a name="V2.9.7b_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The definition of cmykread.dev in gs.mak was incorrect (it -modified color.dev). - -Adds the ability to specify a value for FONTPATH on the command line -(-sFONTPATH=), overriding GS_FONTPATH. - -Replaces the -oper2 configuration resource type with the ability to specify -in the op_def list the dictionary in which operators will be defined. (See -opdef.h for more details.) This is an internal change only. - -</pre><h3><a name="V2.9.7b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - viewgif.ps got an error on interlaced GIF files whose height -wasn't a multiple of 8. - -Changes traceop.ps so it stores the traced operator in the same dictionary -where the operator is currently defined, if possible. - -</pre><h3><a name="V2.9.7b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The new G3 fax drivers crashed on page widths greater than 2623 -(40 * 64 + 63) pixels. (We fixed this by disallowing page widths greater -than approximately twice this.) - - The 24-bit PCX driver had some debugging code accidentally left -in it that produced large volumes of useless console output. - -Removes the previous (Leffler) TIFF/F driver and the TruFax driver. - -</pre><h3><a name="V2.9.7b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - time_.h, gp_unix.c, and gp_sysv.c didn't do the right thing on -SVR4 platforms, where gettimeofday only takes 1 argument. - - The final linking command on Turbo C platforms didn't specify the -COMPDIR directory for the linker. - -</pre><h3><a name="V2.9.7b_Fonts"></a>Fonts</h3><pre> - -Changes the standard Fontmap to use the URW contributed fonts as -work-alikes for Helvetica and Times Roman. - -</pre><h3><a name="V2.9.7b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The garbage collector wasn't in a consistent state. - - In Level 2 mode, statusdict was allocated in global VM rather -than local VM. - - resourceforall gave an error on the built-in categories such as -Filter. - - The file searching algorithm didn't check the current directory -first. - - When opening a file failed, it didn't return a different error -depending on the problem. - - The CCITTFaxEncode filter crashed on widths larger than 2623 (64 -* 40 + 63) pixels. (We fixed this by disallowing page widths greater than -approximately twice this.) - - The .type1getsbw operator gave an invalidfont error if a -CharString started with anything other than a [h]sbw. (Adobe's published -specs say this is invalid, but some Adobe MultiMaster fonts start with a -callsubr and/or a callothersubr.) - - When printing out the stack with == after an error, the error -handler got a repeated (and ultimately fatal) typecheck error if it -encountered an object of non-standard type. - - The token operator could incorrectly attempt to free a structure -on the stack if it encountered an input buffer boundary. - - string_to_ref didn't correctly set the a_local flag in the string -object it created. - - If the -c switch was the last switch on the command line, -Ghostscript always exited without going into interactive mode. - - copy didn't check for errors when copying a dictionary. - -Makes many minor changes (mostly adding prototypes) to reduce error and -warning messages from gcc and other strict compilers. - -Adds files containing the 4 predefined PDF encodings (MacRoman, MacExpert, -WinAnsi, and PDFDoc). - -</pre><h3><a name="V2.9.7b_Library"></a>Library</h3><pre> -Fixes bugs: - - image_bbox in gxccman.c could produce a division by 0 if a -0-width character was being entered into the cache. - - gx_image_cached_char incorrectly specified a scale of 2x2 rather -than 1x1 if it had to read bits from an xfont. - - Stale pointers in the halftone cache weren't cleared properly by -a restore. (We fixed this by making grestoreall clear the halftone cache.) - - setdash used gs_malloc, rather than the current allocator, for -allocating the dash pattern. - - If one attempted to fill a very wide region with a colored -halftone, gx_dc_ht_colored_fill_rectangle would loop indefinitely. - - The container_offset in clipping devices was set incorrectly, -causing the garbage collector to mangle pointers. - -Changes the fopen routine in IODevices so that it can return an arbitrary -error code, rather than simply succeeding or failing. THIS IS A -NON-BACKWARD-COMPATIBLE CHANGE. It only affects IODevice implementations, -of which there are very few. (It doesn't affect ordinary device drivers.) - -Changes the char_metrics xfont procedure so it returns the width as -floating point numbers rather than integers. THIS IS A -NON-BACKWARD-COMPATIBLE CHANGE. It only affects xfont implementations, of -which there are very few. - -Makes many minor changes (mostly adding prototypes) to reduce error and -warning messages from gcc and other strict compilers. - -</pre> - -<h2><a name="Version2.9.6b"></a>Version 2.9.6-beta (5/23/94, not -distributed to the public)</h2> - -<p> -This, too, was supposed to be the last beta release for public -release 3.0. -It was created primarily for a user who desperately needed a Level 1 system -that would run properly on a 64-bit hardware architecture. The garbage -collector is badly broken (it's in the middle of an architectural change); -setpagedevice is still not implemented. - -<h3><a name="V2.9.6b_Documentation"></a>Documentation</h3> - -<pre> -Documents the standard location of Type 1 fonts on AIX. - -Changes the last few mentions of Ghostview for Microsoft Windows to GSview -for Windows. - -Notes that Solaris 2.n provides the X11 header files in a different place. - -Changes README to reflect the differentiation between Aladdin Ghostscript -and GNU Ghostscript. - -</pre> -<h3><a name="V2.9.6b_Procedures"></a>Procedures</h3> - -<pre> -Fixes bugs: - - The compilation rules for the modules that call the IJG library -used -Ijpeg rather than -I$(JPEGSRC). - - The rule for gslib.dev omitted echogs$(XE) as a prerequisite. - -Makes it possible to define the values of buildtime, copyright, revision, -revisiondate, and serialnumber in the makefile. - -</pre><h3><a name="V2.9.6b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - The viewgif.ps utility didn't handle local color tables. - -Updates ps2ai.ps to version 1.81. - -</pre><h3><a name="V2.9.6b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The TIFF and fax devices used some identical names, causing -linker complaints. - - The bj10e/bj200 driver inadvertently disabled the sheet feeder. -(The change may not actually fix this bug, since we don't have either of -these printers with a sheet feeder to test it on.) - - The 'bit' device didn't map colors to pixel values correctly. - - The monochrome PCL driver didn't work around the fact that the -Canon LBP4i printer didn't clear its seed row correctly. - -Adds new drivers: - - A user-contributed driver for the H-P DesignJet 650C. - - A user-contributed driver for the Canon LIPS III printer. - - A completely new tiffg3 driver with one based on the new, fast -faxg3 code. This driver does not include any external code, and carries an -Aladdin copyright. - - A tiffg4 driver, also based on the fast CCITT filter code. - -Removes the tiffg3x driver that appeared briefly in 2.9.5, and renames the -previous (Leffler) tiffg3 driver as tiffg3x. - -Adds support for A0, A1, and A2 paper sizes to PCL drivers. - -Changes all the names involving "props" to "params", for consistency with -the header files, some other internal interfaces, and Adobe's terminology. -THIS IS A NON-BACKWARD-COMPATIBLE CHANGE. However, it only affects devices -that implement their own get_props and put_props procedures, of which there -aren't very many. - -</pre><h3><a name="V2.9.6b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The DV/X makefile used X11 rather than X for the X11 library name. - - The DV/X makefile incorrectly included the PC display drivers. - - The DV/X makefile omitted gp_dosfs.$(OBJ) from the list of -platform-specific files. - - The DV/X makefile used : rather than ; for separating directory -names in GS_LIB_DEFAULT. - - x_.h omitted a needed alias for XtAppSetFallbackResources. - - The makefile entry for System V Unix systems didn't include -gp_unifn.$(OBJ). - - The comment before LDFLAGS in the gcc makefiles incorrectly -suggested using the -x switch on Ultrix platforms. - - The forward declaration of quant_params in zfdct.c upset the Sun -compiler because it declared a parameter as float rather than floatp. -* - The Microsoft C compiler, like the Borland C compilers, only -compares the offset part of segmented pointers. - -</pre><h3><a name="V2.9.6b_Fonts"></a>Fonts</h3><pre> - -Adds a fontmap suitable for use with Adobe Type Basics. - -</pre><h3><a name="V2.9.6b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The STACK_LOOP_BEGIN macro in istack.h didn't work correctly on -segmented systems. - - The end_phase procedure in igc.c didn't work correctly on -segmented systems. - - Indexed color spaces didn't mark their base space properly when -garbage collecting. - - The garbage collector didn't work on segmented systems, because -it smashed the lsize field of large objects with mark/reloc information. - - Some structures didn't have correct associated GC procedures: -gs_indexed_map, gs_client_pattern, gs_pattern_instance. - - restore could free names or stack segments that were still -referenced. -* - If a packed object caused an error, the error object could be set -to garbage rather than the correct object. -* - Badly designed error handlers which use $error for temporary -storage could cause a dictfull error. - - Some compilers objected to the use of "dict" as a variable name -in a scope where it was defined as a type. - - IODevices were declared const and non-const inconsistently. - - setpagedevice popped one object too many off the stack if the -request included any subdictionaries that needed to be merged. - - More garbage collector bugs were fixed. - - If the current stack block was empty, Level 2 restore would give -a spurious typecheck error. - - The CCITTFaxEncode filter could get confused if it emptied the -input and filled the output at the same time. - - The CCITTFaxEncode filter could insert an extra EOL if it had to -suspend at certain times. - - The new parser for literal strings (as of 2.9.5) could mis-count -internal parentheses if a parenthesis caused the internal buffer collecting -the string to overflow. - - If the current stack block had fewer than 3 elements, -.type1addpath could report a spurious typecheck error. - - Text rendering operations (show, stringwidth, etc.) caused a -crash if the current color was a Pattern that hadn't already been -rasterized. - - If a program did a grestore when the graphics state stack was -empty, the graphics state was initialized to unexpected (and, in some -cases, invalid) values. - - pathforall could cause a bogus stackoverflow if it overflowed the -current stack block. - - Closing an encoding filter with a procedure as target left the -filter on the stack. -* - The outer loop in dict_lookup() could cause an addressing fault -on segmented machines when looking up Level 2 operators, because the offset -could get decremented past 0. - - There was an = instead of an == in a test in scanner_reloc_ptrs. - - The call on gs_reloc_refs in sproc_reloc_ptrs in zfproc.c omitted -the last (gcst) argument. - -(Re-)implements the 2-D case of CCITTFaxEncode, and fixes a couple of bugs -in it. - -Adds DiffEncode and DiffDecode filters that implement color prediction for -the PDF variant of the LZWDecode filter. - -Changes the specification of .oserrorstring to be similar to getenv, -where, etc. THIS IS A NON-BACKWARD-COMPATIBLE CHANGE; however, no -user-written code should be using .oserrorstring. - -Adds oversampling for better character rasterizing. - -</pre><h3><a name="V2.9.6b_Library"></a>Library</h3><pre> -Fixes bugs: - - gx_dc_ht_colored_fill_rectangle gave a compiler warning because -of a problem with const pointers. - - dfmul2fixed_vars (in gxfixed.h) omitted the & before vda on -big-endian platforms, causing compilation errors. - - IODevices were declared const and non-const inconsistently. - - The Type 1 rasterizer never enabled overshoot suppression. - - stroke didn't fatten the line properly if stroke adjustment was -enabled, or if the line was horizontal or vertical. -* - The clipping test for characters was too strict by almost 1 -pixel, leading to unnecessary clipping of text at the edge of the clipping -box. -* - The initial clipping box was computed incorrectly for devices -whose initial transformation matrix included a rotation. - -Changed the implementation of clipping lists and show enumerators to use -separate objects rather than embedded objects, to pacify the GC. (This is -an internal change, not visible at the PostScript or API level.) - -Makes the character cache trim off left and right blank areas, as well as -top and bottom. (Internal change.) - -Adds oversampling for better character rasterizing. - -</pre> - -<h2><a name="Version2.9.5b"></a>Version 2.9.5-beta (4/11/94)</h2> - -<p> -This was supposed to be the last beta release before 3.0, but it -won't be. -The only known major defects are the unreliable garbage collector, and the -dummy implementation of setpagedevice/currentpagedevice. - -<h3><a name="V2.9.5b_Documentation"></a>Documentation</h3> - -<pre> -Fixes bugs: - - The file commnew.doc didn't belong in the fileset. - -Notes in the makefiles that SVR4 systems may need to set EXTRALIBS=-lnsl. - -Adds a user-contributed `man' page for the ps2epsi utility. - -</pre><h3><a name="V2.9.5b_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The IJG files didn't compile properly by themselves, because they -didn't have $(AK) in their dependency list. - -Changes back the handling of files named on the command line, so that they -are first sought in the current directory, and if that fails, use the -search path. (2.9.4-beta changed things so that files on the command line -did not use the search path, because as of that version, the search path -doesn't necessarily include the current directory. I consider the "check -the current directory and then use the search path" rule, which is the -MS-DOS standard and was used in Ghostscript prior to 2.9.4, a serious -mistake, since it is one of the best-known security holes in Unix and can -also produce confusing and unexpected results depending on the current -directory; I would much rather have a clear distinction between -user-specified files, which should not use any path searching, and system -files, that only use the defined search path. However, as of this moment, -users seem to want the convenience at the expense of insecurity and -confusion.) - -Adds '.' to the beginning of the search path for MS-DOS platforms, to -conform to the usual MS-DOS file searching convention. - -Adds a -c ("code") switch, which interprets following arguments (until the -next switch) as PostScript tokens. - -Changes the handling of FEATURE_DEVS so that either level1.dev or -level2.dev must normally be selected. THIS IS A NON-BACKWARD-COMPATIBLE -CHANGE for Level 1 systems, which formerly set FEATURE_DEVS to an empty -definition. - -</pre><h3><a name="V2.9.5b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - bench.ps didn't switch back to local VM properly before running -the program being benchmarked. - -Adds a ppmsetpagesize command to the pstoppm utility. - -</pre><h3><a name="V2.9.5b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The PCX and GIF drivers used an incorrect algorithm for computing -the blue component of the color palette, which could cause colors to come -out with not quite enough blue. - - The SPARCprinter driver wouldn't compile with non-ANSI compilers. - -Adds new drivers: - - A user-contributed driver for DEC sixel displays like the VT240 -(sxlcrt, in gdevln03.c, which has a FSF copyright.) - - A much larger and supposedly faster version of the TIFF/F driver -(tiffg3x, in gdevtifx.c), contributed by a user. This has the same -copyright as the TIFF/F driver (gdevtiff.c). - - A driver (faxg3, in gdevfax.c) that produces plain Group 3 fax -output with no header, using the CCITTFaxEncode filter to do the work. -(This is around 2.5-3 times as fast as the other fax drivers distributed -with Ghostscript.) - - A user-contributed driver for the Mitsubishi CP50 color printer. - -Changes the `bit' driver so one can set the Colors and *Values properties. - -Makes the color mapping for PC displays, PCX files, and GIF files identical -(they differed slightly before). - -</pre><h3><a name="V2.9.5b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - VMS used DISPLAY rather than DECW$DISPLAY to get the display name -if opening the display failed. - - Many minor bugs relating to OS/2 and Win32 were fixed. - - On Unix and DV/X platforms, the install script didn't mkdir -$(gsdir), and didn't mkdir the intermediate directory for the man page. - - On BSD and UTek platforms, the declaration of memset in -memory_.h, and the definition in gsmisc.c, conflicted with the ANSI -declaration. - - One of the SPARC compilers compiled the intersection computation -in arc_either (gspath.c) incorrectly. - - The temporary file names created under OS/2 could exceed the 8.3 -length limit. - -</pre><h3><a name="V2.9.5b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The test files for the IJG library had been damaged by EOL -conversion. - - The garbage collector didn't mark some of the most recently -created names. - - The interpreter would sometimes report a typecheck instead of a -stackunderflow. - - If aload didn't have enough room on the stack, it would report a -rangecheck rather than a stackoverflow. - - zcontext wouldn't compile, because it hadn't been updated to the -new GC interfaces. - - The definition of private_st_stream_proc_state in ifilter.h ended -with a semicolon, which upset some compilers. - - load didn't check to make sure that the dictionaries it examined -had read access. - - cvrs didn't handle negative numbers in radix 2 or 3 properly. - - The allocator could become confused if it was asked to allocate a -large array. - - readline gave an ioerror rather than a rangecheck if it -overflowed the string. - - The allocator didn't free packed arrays properly. - - The allocator's check for LIFO freeing of arrays was off by 1, so -it never succeeded. - - The undercolor removal and black generation procedures weren't -initialized properly. - - If the interpreter couldn't find gs_init.ps, it returned a random -exit code. - - If an operator expected a procedure and didn't get one, it -sometimes gave an invalidaccess rather than a typecheck. - - Unix file enumeration often did the wrong thing if there were -directories in the pattern. - - The ASCIIHexDecode filter read an extra character after the -terminating >. - - scalefont didn't fill in ScaleMatrix properly. - - The CCITTFaxEncode filter crashed if the width of the page wasn't -a multiple of 8 bits. - - The error printing code used .languagelevel, which wasn't defined -in Level 1 configurations. - - setpagedevice didn't pop its argument. - - Definitions in statusdict didn't change according to the current -language level. - - Separation color spaces didn't allow strings as color space names. - - Due to a bug in chunk_locate_ptr, the garbage collector sometimes -decided incorrectly that a pointer was pointing outside collectable space. - - (Many other garbage collector bugs were fixed.) - -Implements additional Level 2 features: - - Garbage collection for strings. - - Expandable operand and dictionary stacks, and the ability to set - the maximum size of these stacks. - - Additional user and system parameters. The following are dummies: - AccurateScreens, JobName, JobTimeout, WaitTimeout. - - Procedure-based filters usable with cvx/exec and token. - - Separation color spaces (always using the alternate space). - (These were theoretically implemented in version 2.6, but they were - never tested and were actually missing most of the implementation.) - - VMThreshold and VMReclaim for invoking GC automatically. - -Adds a hook in iscan.c for parsing DSC comments. - -Adds encoding and decoding filters for the BCP and TBCP protocols. These -are not fully implemented yet: - - The interrupt and status request characters are ignored on input, - and never generated on output; - - The TBCP encoder doesn't emit the start-of-protocol string; - - The TBCP decoder doesn't recognize the end-of-protocol string. - -Factors out Type 1 font capability as a separate feature. - -Changes the names of some files: - packed.h to ipacked.h; - bnum.h to ibnum.h. - -Changes the name of the value.index member of a ref to value.boolval. -(Internal change only.) - -</pre><h3><a name="V2.9.5b_Library"></a>Library</h3><pre> -Fixes bugs: - - The definition of RELOC_PTRS_BEGIN in gsstruct.h wouldn't compile -properly with non-ANSI compilers. - - The JPEG library wouldn't compile properly with non-ANSI compilers. -* - The platform font machinery gave up too easily in some cases. - - CMYK devices needing halftoning converted the CMYK color to RGB. - - The debugging code in arc_add (gspath.c) didn't print the output -values correctly. - -Factors out Type 1 font capability as a separate feature. - -</pre> - -<h2><a name="Version2.9.4b"></a>Version 2.9.4-beta (2/19/94)</h2> - -<h3><a name="V2.9.4b_Procedures"></a>Procedures</h3> - -<pre> -Changes Ghostscript's path searching algorithm so that it does not -automatically look in the current directory first. (The former algorithm -was more MS-DOS-like; the new one is more Unix-like.) If you want to -include the current directory, you must include '.' in the search path. -THIS IS A NON-BACKWARD-COMPATIBLE CHANGE. - -Adds two new resource types for genconf.c: - - -header filexxx.h adds #include "filexxx.h" to gconfig.h. - - -libpath dir adds dir to the list of library search paths. - -</pre><h3><a name="V2.9.4b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - impath.ps (used by bdftops) computed the starting X coordinate -incorrectly, typically causing characters to be displaced slightly to the -right. - - pstoppm.ps didn't handle local and global VM properly. - -Adds a ps2ai.ps utility, contributed by a user, for converting arbitrary -PostScript files into a form compatible with Adobe Illustrator. - -</pre><h3><a name="V2.9.4b_Drivers"></a>Drivers</h3><pre> - -Adds new drivers: - - A user-contributed driver for Imagen Impress laser printers. - - A user-contributed driver for the DEC LA75plus printer. - -</pre><h3><a name="V2.9.4b_Platforms"></a>Platforms</h3><pre> - -Under OS/2, adds the ability to keep Ghostscript in memory for a -specified number of minutes. - -Adds support for Win32 and Win32s. - -Changes the MS Windows platform font interface so that it does not attempt -to render fonts at sizes smaller than 6 pixels. Changes the X Windows -interface, which already did this for 4-point and smaller fonts, to also -use a lower limit of 6 pixels. Also changes the X Windows platform font -machinery so it does not render fonts at sizes larger than 36 pixels: at -large sizes, Ghostscript does a perfectly good job, and some X font servers -rasterize the entire font and lock up the entire window system while doing -so. - -</pre><h3><a name="V2.9.4b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - currentdash always returned a new array of reals, rather than the -actual argument of setdash. - - Strings in binary object sequences read in as integers. - - Because of a bug in chunk_locate_ptr, some large objects didn't -get freed properly. - - If an error occurred while processing an image, Ghostscript would -attempt to free random blocks of storage. - - Input filters discarded trailing data, rather than filling it out -with zeros. (This is now fixed for ASCIIHexDecode and ASCII85Decode; it's -not clear what other filters it should affect.) - - The ASCII85Encode filter produced garbage output for the final -1-4 bytes before EOD. -* - The TIFF output driver produced incorrect output for the second -and subsequent pages if the output was being produced on multiple files. -* - The default handleerror did a 'stop', which was not correct. - - gpcheck.h converted all positive return codes to 0 if interrupt -checking was enabled. - - Images with multiple data sources didn't work. - - Images with 12-bit sample values didn't work. - - Images with a file as the data source read additional data beyond -what was required. - - 2 vmreclaim worked (pretty much), but 1 vmreclaim didn't. - - If %lineedit was opened multiple times, characters from later -openings overwrote characters from earlier ones. - - token returned garbage for the "remaining string" result when -reading from a string, if it actually read all of the string. (New bug in -2.9.2, probably.) - -Implements additional Level 2 features: - - DCTEncode and DCTDecode filters. - - Filters with procedures as the data source or target. - (Except for token and cvx/exec.) - - Garbage collection for names. - -Changes the error printout so that strings are always truncated at 200 -characters. - -For Level 2 systems, changes the initial setting of the object format -parameter from 0 to an appropriate non-zero value. - -* Changes the .quit operator so that it takes two operands, an error object -and an error code; if the latter is negative, the interpreter returns this -as the error code, rather than e_Quit. - -Makes StandardEncoding and ISOLatin1Encoding arrays, rather than packed -arrays, on large-memory systems, for compatibility with certain test -suites. Changes .registerencoding to accept arrays as well as packed -arrays. - -</pre><h3><a name="V2.9.4b_Library"></a>Library</h3><pre> -Fixes bugs: - - Due to an error in cie_mult3, CIE-based colors were badly -mis-mapped. -* - Very narrow (but not empty) rectangles would disappear. -* - Small halftone cells could smash the next higher entry in the -halftone cache. - - The orientation algorithm in gxstroke.c still interchanged -clockwise and counter-clockwise coordinate systems (after having been -"fixed" at least 3 times). - - Stroking 1-pixel-wide lines shortened them, instead of -lengthening them, if non-butt caps were requested. - -Refactors mem_mapped8_copy_mono because of limitations in the bcc32 -compiler. - -</pre> - -<h2><a name="Version2.9.3b"></a>Version 2.9.3-beta (1/19/94)</h2> - -<p>This version was created for evaluation purposes for a few users who -needed Level 2 capability; it was never released to anyone else, even -beta testers. - -<h3><a name="V2.9.3b_Documentation"></a>Documentation</h3><pre> -Fixes bugs: - - The description of psview and xpsview was incorrect. - -</pre><h3><a name="V2.9.3b_Procedures"></a>Procedures</h3><pre> -Changes the installation directories for Unix and similar systems to put -Ghostscript data in $(datadir)/ghostscript/gs-NN.NN.NN rather than directly -in $(datadir)/ghostscript. (Fonts still go in $(datadir)/ghostscript/fonts.) - -</pre><h3><a name="V2.9.3b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - Some spaces were incorrectly replaced with tabs in the help -message in the 3B1 display driver. - - The BMP driver wrote a spurious scan line at the beginning -of its output. - - The monochrome PCX driver had the two palette elements -interchanged. - -Adds new drivers: - - A user-contributed driver for the Xerox XES printer format. This -has a FSF copyright. - - A user-contributed driver for the Epson AP3250 printer. (This is -the same as the Stylus 800, with slightly different margins.) - - A user-contributed driver for the DEC LA70 printer with some -algorithms for improving text at low resolutions. This has a FSF -copyright. - - A user-contributed driver for an intermediate-resolution mode -for 9-pin "Epson-compatible" printers. - -Changes the name of the Stylus 800 driver from escp2 to st800. - -Adds a compile-time flag to the Epson driver to cope with Panasonic 9-pin -printers, which sometimes have trouble mixing graphics and tabs. - -</pre><h3><a name="V2.9.3b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The MS Windows driver (gp_mswin.c) referred to iodev.h rather -than gxiodev.h. - - On Unix System V platforms, gp_unifs.c and gdevpipe.c were -incorrectly omitted from the link list. - - (Some?) System V platforms don't have the S_ISDIR macro, -requiring a change in stat_.h. - - The Unix `install' target didn't install gs_std_e.ps and -gs_iso_e.ps. - - No MODULES.LIS file was provided for VMS. - -Adds Desqview/X makefiles that actually work. - -Documents the set of H-P-supplied patches needed to make H-P's -compilers process Ghostscript. - -Changes the MS Windows driver so that if the user presses the Enter key -while the image window has the focus, the text window will be brought to -the top and made the active window. This is useful when viewing a -multi-page document with Ghostscript. - -</pre> -<h3><a name="V2.9.3b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The definition of public_st_client_color() in gxccolor.h -included an extraneous semicolon. - - The definition of private_st_AXD_state() in sfilter.h included an -extraneous semicolon. - - saxx.c didn't include sfilter.h, which it needed for the -definition of private_st_AXD_state(). - - ialloc_struct failed to create a separate chunk if the structure -was very large. - - setcolorspace didn't allocate the colorspace object in the same -VM space as the graphics state, causing problems when the colorspace was -freed. - - In rare circumstances, currentfile could return an empty array -rather than a file. - - Dictionary keys were always allocated in global VM. - - If NOPLATFONTS was true, definefont didn't check whether the -dictionary was read-only before trying to insert an ExactSize key. - - startjob could get an invalidaccess error, because serverdict was -allocated in global VM. - - Using definefont with an already registered font created a -circular list structure. - - If a PostScript procedure appeared as a CharString in a Type 1 -font, it was always called with the character name, never the character -code. - - The SubFileDecode filter didn't work with a non-empty EOD string -(went into an endless loop). (Probably a new bug in 2.8.) - - save/restore didn't properly restore the maxlength of a -dictionary, causing data to get smashed at random. (New bug in 2.9.) - - save didn't mark objects as old, so a nested restore had no -effect. (New bug in 2.9.2.) - - After returning from an OtherSubrs callback, op_type1_free -freed the saved interpreter state incorrectly. (New bug in 2.7.) - - Level 1 configurations didn't work because .makeoperator gave an -invalidaccess error. (New bug in 2.9.2.) - - ASCII85 string literals didn't work. (Probably a new bug in 2.8.) - - If the current global/local allocation mode was different at the -end of a file than at the beginning, an addressing fault could occur -(gs_unregister_root in gs_run_string). (New bug in 2.9.2.) - - After a setfileposition on a file open for reading, -fileposition would return an incorrect value, even though the stream -was actually repositioned properly. - -Brings the dictionary unpacking code for the DCT filters into line with -Adobe Technical Note 5116, which describes the Picky parameter for -DCTDecode and the NoMarker, Resync, Blend, Picky, and Relax parameters for -DCTEncode. - -Changes the .quit operator so that if given a negative argument, the -interpreter returns this as the error code, rather than e_Quit. - -Changes the Ghostscript integer version number from 100P+10S+T to -10000P+100S+T. - -Changes the default halftone screen for high-resolution devices, both -black-and-white and color. - -</pre><h3><a name="V2.9.3b_Library"></a>Library</h3><pre> -Fixes bugs: - - The software floating multiply code used with USE_FPU=-1 only -worked on little-endian platforms. - - Specifying a left side bearing to .type1addpath produced an -inappropriate offset. - -</pre> - -<h2><a name="Version2.9.2b"></a>Version 2.9.2-beta (1/2/94)</h2> - -<p>This version was distributed only to beta testers. It adds a garbage -collector and full local and global VM support. It is the first version -that sets languagelevel = 2, i.e., claims to be a Level 2 implementation. - -<h3><a name="V2.9.2b_Documentation"></a>Documentation</h3><pre> -Fixes bugs: - - make.doc still referred to use_* variables in gdevx.c, and -use.doc didn't explain the use* X resources. - -Notes that -Olimit=1000 is needed to compile Ghostscript on AXP systems -under OSF/1 1.3. - -</pre> - -<h3><a name="V2.9.2b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - viewgif.ps did not work with interlaced images. - - font2c.ps omitted gsmemory.h from the #include list in compiled -fonts. - -</pre><h3><a name="V2.9.2b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The MS Windows driver hadn't been updated to work with the -new additions to the gx_device structure. - - The BMP file driver wrote one scan line too many. - - The cdj driver omitted an important cast to int in the error -diffusion code (FSdither macro). - -Changes the SuperVGA drivers to recognize erasepage and reset the -color table, like the X driver. - -Adds some fragmentary code to begin implementing the PostScript fax -extensions. - -</pre><h3><a name="V2.9.2b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The procedure initializers for the MS Windows console I/O -were missing the new reset element. - - The makefile entry in bcwin.mak used -fdev rather than -iodev. - - The Borland C++ makefiles exceeded MS-DOS's line length limit if -the compiler files were in the standard Borland directory (BORLANDC). - - Some procedures weren't declared with prototypes in gp_vms.c. - - Some declarations had to be reordered to pacify the VAX compiler. - - Under MS Windows, Ghostscript didn't automatically de-iconify the -text window to display messages on an error exit. - - The Unix makefile rule for gconfig_.h used echogs rather than -./echogs. - - The Microsoft C makefile referred to an obsolete file gs.tr. - - gp_unifs.c used strpbrk and strrchr, which some systems lack. - -Updates the OS/2 code and documentation for compatibility with the current -Ghostscript version. - -</pre><h3><a name="V2.9.2b_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - The X11 .pfa fonts replaced their .gsf requirements in the -fontmap, but not distributed with the previous (beta) release. - -Adds fontmaps appropriate for use with DEC Ultrix and OSF/1 systems. - -</pre><h3><a name="V2.9.2b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - 4-value entries in the Metrics dictionary were interpreted with -the width and side bearing interchanged. - - Objects large enough to require their own chunk were not freed -properly. - - The GS_FONTPATH scanner didn't deal with the possibility that -opening a file might fail. - - The interrupt and timeout errors incorrectly pushed an error -object on the operand stack. - - imagemask gave an error if it was invoked with a dictionary -argument with a current color space with more than 1 parameter. - - definefont insisted that a new font not have a FID entry. - - Some places didn't cast char to byte when needed. - - An extra element was left on the stack when substituting the -default font for a font whose file couldn't be found. - - The CCITTFaxDecode filter didn't allow the dictionary to be -omitted. (The Adobe documentation doesn't allow this, but Adobe -implementations do.) - - When the input came from a pipe (`-') switch, opening a filter on -currentfile that required more than 1 input byte to make progress would -cause Ghostscript to hang (in sreadbuf). - - The interpreter didn't call gs_set_lib_paths before executing a -compiled-in initialization file. - - A stream could be closed more than once. (New bug in 2.8.) - - The LZW decoder produced incorrect output if a code string was -too long to fit into a single output buffer. (New bug as of 2.8.) - -Implements a special check in def to allow construction of systemdict, -which is stored in global VM but references dictionaries in local VM. - -Implements additional Level 2 features: - - %null% and %ram% IODevices. - - startjob, exitserver. - - Local and global VM (finish). - - Garbage collection (for everything except names and strings). - -Moves the procedures for selecting paper size from systemdict to userdict. - -Sets languagelevel to 2 in Level 2 mode, since essentially all of -Level 2 is now implemented. - -Factors out the Level 1 extended color facilities (CMYK color and -colorimage) as a separate configuration feature. - -Adds some preliminary code to begin implementing the Adobe BCP and TBCP -communication protocols. - -Changes the implementation of save and restore so that the bookkeeping -structures are allocated in the new area, not the old. (This is an -internal change not visible at the PostScript level.) - -</pre><h3><a name="V2.9.2b_Library"></a>Library</h3><pre> -Fixes bugs: - - gdevprn used some preprocessor macros in formal argument -lists that ansi2knr couldn't handle. - - pick_cell_size called gs_distance_transform with a 0 argument -that non-ANSI compilers didn't automatically promote to floating point. - - gs_screen_init called hypot with integer arguments that -non-ANSI compilers didn't automatically promote to floating point. - - Some places didn't cast char to byte when needed. - - The vx/vy origin adjustment for WMode=1 wasn't implemented. - - The pattern cache wasn't initialized properly. - - Composite fonts didn't properly decode strings that started with -an escape sequence, which have a special (undocumented) decoding rule, and -also didn't properly decode strings with multiple consecutive escape -sequences. - -Factors out the Level 1 extended color facilities (CMYK color and -colorimage) as a separate configuration feature. - -</pre> - -<h2><a name="Version2.9.1b"></a>Version 2.9.1-beta (12/7/93)</h2> - -<p>This version was distributed only to beta testers. - -<h3><a name="V2.9.1b_Utilities"></a>Utilities</h3><pre> -Adds a viewgif.ps utility to view GIF files. The current version does not -work with interlaced data, local color tables, or files containing more -than one image. - -</pre><h3><a name="V2.9.1b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - putinterval and copy didn't do the right thing if the source and -destination were aliases for overlapping sections of the same array or -string. - - The DCT filter stub didn't allow the dictionary to be omitted. -(The Adobe documentation doesn't allow this, but Adobe implementations -do.) - -Adds an optional dictionary argument to the LZWDecode filter, containing -InitialCodeLength, FirstBitLowOrder, BlockData, and EarlyChange entries. -Setting these parameters appropriately allows reading (non-interlaced) GIF -data directly. - -</pre><h3><a name="V2.9.1b_Library"></a>Library</h3><pre> -Fixes bugs: - - setdash produced inverted output if the pattern had an odd -number of elements and the offset O had the property that L <= O mod -2*L, where L was the sum of the pattern elements. - -</pre> - -<h2><a name="Version2.9b"></a>Version 2.9-beta (12/6/93)</h2> - -<p>Like 2.7, this version was created to satisfy a contractual -requirement, -and will never be distributed to anyone other than the other party to the -contract. - -<h3><a name="V2.9b_Documentation"></a>Documentation</h3><pre> -Notes that Ghostscript runs on IBM PCs and compatibles under DR DOS -6.0. - -Notes that Ghostscript will run on IBM PCs and compatibles with -Hercules display cards if you redirect text output to a file. - -Notes that the alternate DeskJet 500C driver (djet500c) does not work -on the 550C. - -Gives a list of system-specific directories where Type 1 fonts are -likely to be installed, as a suggested setting for GS_FONTPATH. - -</pre><h3><a name="V2.9b_Procedures"></a>Procedures</h3><pre> -Changes the distribution script so that it stores all text files in the -main source archive with Unix end-of-line conventions, but with DOS -end-of-line conventions in the MS-DOS-specific archive. - -Changes the MS-DOS, MS Windows, and OS/2 makefiles so that 486SX and 486DX -processors are different CPU_TYPEs. (The former, designated by -CPU_TYPE=485, does not include an on-chip FPU.) - -Adds a line to gs_init.ps which can be uncommented to select A4 as -the default paper size. - -Adds a definable CFLAGS macro to the makefiles, allowing -DA4 to -select A4 as the default paper size. - -Adds the H-P printer drivers to the standard Unix configurations. - -</pre><h3><a name="V2.9b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - If there were no unencoded characters, prfont.ps would get -an error. - -Changes ansi2knr to accept a wider range of function declaration syntax, -and to not depend on any Ghostscript header files. - -</pre><h3><a name="V2.9b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - Several drivers (DigiFax, Epson LQ-2550, NEC P6) didn't handle -A4 paper width. - - The IBM ProPrinter wasn't being initialized properly. - - The Epson driver didn't work properly with compilers that -insisted on 'char' being a signed type. - - The Epson driver ignored its end_string argument, producing -incorrect end-of-page behavior on some printers. - -Adds new drivers: - - User-contributed drivers for Bellcore MGR (a window manager most -commonly used with OS-9) devices. - - A user-contributed driver for the CIF file format. - - A user-contributed driver for the HP 2563B line printer. - -Changes the LaserJet 2p, 3, and 4 drivers so they set the initial position -to (0,0) rather than (0,0.25"). (I don't remember why it was the other -way.) - -Implements the PageCount property in all drivers, not just printer -drivers. - -Introduces a new gx_tile_bitmap type, and changes the tile_rectangle -device procedure to take it in place of gx_bitmap. THIS IS A -NON-BACKWARD-COMPATIBLE CHANGE. However, it only affects devices that -implement their own tile_rectangle procedures, of which there aren't very -many. - -</pre><h3><a name="V2.9b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The VMS module lists referred to SDCTD and SDCTE instead of -SDCT. - - The Unix install script tried to install the non-existent file -readme.doc. - - Microsoft C does something bizarre with empty macro parameters, -which caused a problem with the gs_struct_type_... macros. - - The Unix platforms didn't automatically handle the presence -or absence of <dirent.h>. - - The DEC Alpha OSF/1 1.3 library lacks `const' in the prototype -for popen, which requires a workaround. - - The DEC Alpha OSF/1 1.3 X Windows library uses `private' as a -member name. - -Splits off gp_unifs.c, containing code common to "Unix-like" file systems. - -Adds a user-contributed OS-9 platform. - -</pre><h3><a name="V2.9b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The currentfile cache wasn't updated properly if an executable -file appeared in the middle of a procedure. In particular, eexec-encoded -.PFB fonts often didn't work. - - There was an extraneous `goto top' in scfd.c. - - An integer constant overflowed in iname.c. - - -2147483648 (i.e., -1 << 31) was converted to a float. - - eexec didn't skip the first 4 characters correctly if they were -split across a buffer boundary. - - The font/matrix pair cache didn't properly free entries with only -an XUID that was being deallocated. - -Implements additional Level 2 features: - - Patterns, makepattern, setpattern. - - IODevice resource, setdevparams, currentdevparams. - - OutputDevice resource, setpagedevice, currentpagedevice. - (Partially implemented.) - -Adds a new type t_struct to handle miscellaneous types that are allocated -as objects and that the interpreter doesn't handle specially, and changes -condition, fontID, gstate, lock, and save types to use t_struct. (This is -an internal change, not visible at the language level.) - -Moves the maxlength of a dictionary to its own ref, eliminating the "size -of integer" hack. (This is an internal change, not visible at the -language level.) - -Adds the last OS error number to the error printout. - -Removes the obsolete framedevice operator. - -Implements resetfile (the only Level 1 operator not yet implemented!). - -Changes the name of the getdevice operator to .getdevice. - -</pre><h3><a name="V2.9b_Library"></a>Library</h3><pre> -Fixes bugs: - - A couple of necessary casts from char * to byte * were omitted. - - A Sun compiler required an extra cast to (void *) in the e1 -macro in clip_rect_enum_ptrs in gxcpath.c. - - The gx_dc_ procedures defined in gxdraw.c weren't marked as -'private'. - - The number of "on" pixels in a halftone cell sometimes varied by -1 from cell to cell. - - Mapping a gray level to CMYK didn't subtract it from 1 (to -produce the K component). -* - charpath took hints into account. - -Shuffles the order of some declarations to pacify the VMS C compiler. - -</pre> - -<hr> - -<h2><a name="Version2.8b"></a>Version 2.8-beta (11/10/93)</h2> - -<p>This version was distributed only to beta testers. It adds Type 0 -font -support. It also includes extensive redesign of streams (to eventually -support procedure streams) and device properties (to eventually support -get/setpagedevice and get/setdevparams). - -<h3><a name="V2.8b_Documentation"></a>Documentation</h3> - -<pre> -Notes the change in X11 foreground/background handling. - -Changes README so it no longer claims that Ghostscript works with X11R3. - -Notes (in devs.mak) that the cdjmono driver is the best one to use for the -DeskJet 510. - -</pre><h3><a name="V2.8b_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - echogs wasn't always invoked with ./ on Unix systems. - -Changes the file name unix-ansi.mak to unixansi.mak, so it can be created -on a MS-DOS system. - -Adds a new "feature", ccinit.dev, which compiles and links the -initialization files (gs_*.ps) into the executable, just as ccfonts.dev -compiles and links fonts. If ccinit and ccfonts are both selected, the -only external file needed at run time is Fontmap. Note that you must have -a working version of Ghostscript already in order to create a version that -uses the ccinit feature, just as for ccfonts. - -</pre><h3><a name="V2.8b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - the ps2image utility didn't put a %! on the first line of the -output. - -</pre><h3><a name="V2.8b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The Hercules display driver didn't include definitions for -outport2 and PAGE_HEIGHT_INCHES, which it uses. - - The BGI driver didn't call setactivepage or setvisualpage, -which it needs to do in general. - - The Apple DMP driver declared dmp_print_page rather than -appledmp_print_page, causing a compilation error. - -Changes the X11 driver so that it doesn't use the default foreground and -background colors: you must set foreground and background explicitly for -Ghostscript if you want them to be other than black and white -respectively. - -Adds new user-contributed drivers for: - - The StarJet 48 inkjet printer; - - The GNU/Linux VGALIB display interface. - - OS/2 Presentation Manager. - -Changes the margins of the Epson driver to 0.2, 0.0, 0.0, 0.0, which -more accurately reflect the printer's capabilities. - -Changes the get_props and put_props device procedures to take property -list "objects" with a procedural interface, rather than a data structure -interface. THIS IS A NON-BACKWARD-COMPATIBLE CHANGE. It affects all -get_props and put_props procedures. Fortunately, there were only a few -devices that implemented their own get_props and put_props procedures (the -H-P color printers, and the three window systems -- X Windows, MS Windows, -and OS/2 PM). - -</pre><h3><a name="V2.8b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The meaning of the -p switch for the Watcom compile-and-link -program was changed between Watcom C/386 versions 8.5 and 9.5, causing the -make process to malfunction. - - The SCFTAB and SCFDTAB modules were omitted from the VMS link -list. - -Adds user-contributed code for OS/2. - -Removes the assumption that an 80486 CPU implies the presence of hardware -floating point, since the 486SX and Cyrix 486SLC don't have it. - -</pre><h3><a name="V2.8b_Fonts"></a>Fonts</h3><pre> -Fixes bugs: -* - The GS_FONTPATH scanner didn't recognize .PFB fonts beginning -with %!PS-AdobeFont. -* - The GS_FONTPATH scanner often didn't recognize .PFB fonts at all. - - Type 1 fonts always set the line join, line cap, and miter limit -to known values, rather than using the current values. (Using the current -values doesn't make much sense, but it's apparently what the Adobe -implementations do.) - - DISKFONTS didn't work, because of the change in the Ghostscript -fonts to do a systemdict begin/end (in version 2.7.1). - -</pre><h3><a name="V2.8b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - == didn't produce exactly the same output as the Adobe -interpreters. (Some automated debugging and testing programs care.) - - The CCITTFaxEncode filter could get caught in an infinite loop, -because it failed to mask a byte datum when scanning for runs of black -pixels. - - The write operator gave an error for values outside the range 0 -to 255, rather than just using the low-order 8 bits. - - Some applications call a statusdict procedure named -setresolution without checking first whether it is present; Ghostscript -didn't provide one. - - Reading from a closed stream caused an error instead of -returning EOF. - - Input streams didn't close automatically at EOF. - - findfont was defined as an operator, not a procedure. - - closefile on a closed file gave an error. (It isn't obvious -that the Adobe documentation specifies that it shouldn't, but that's what -Adobe says they do.) - - The LZWDecode filter didn't handle codes representing strings -longer than the buffer size correctly. - - The LZWDecode filter only allowed 4095 codes to be used, rather -than 4096. - - The rand operator produced an infinite string of zeros if -given 0 or 0x7fffffff as the seed. - - When a CDevProc procedure was called, there was an extra -copy of the character name on the operand stack below the operands of -CDevProc. - -Replaces all stream implementations with new ones designed to allow -interruption at arbitrary times. ****** The 2-D case of CCITTFaxEncode -hasn't been converted (but it probably didn't work before, either). - -Implements additional Level 2 features: - - Type 0 (composite) fonts. - -Adds an eexecEncode filter. - -Implements setcolorscreen, which was accidentally omitted from 2.7. - -</pre><h3><a name="V2.8b_Library"></a>Library</h3><pre> -Fixes bugs: -* - In colorimage, if the color space of the image was different -from the current color space, and the first data values on a scan line -were zeros, the wrong color could result. - - The new flatness testing algorithm could overflow, producing -straight lines or obvious polygons instead of curves. - - Images could fail to display pixels after the first non-blank -pixel on a line if halftoned color was required. (This bug was probably -introduced in 2.7.) - - Interpolation between transfer map entries didn't work, because -of a rounding/truncation bug in frac2bits (bug introduced in 2.7.1.) - - cshow did an extra grestore at the end. - -* Implements a hack to slightly displace 1-bit-wide or -high images. This -is necessary to work around a bug in TeX (or dvips?), which uses such -images to draw horizontal and vertical lines without positioning them to -ensure that they cover device pixel centers. - -Adds support for composite fonts (no new client procedures). - -</pre> - -<hr> - -<h2><a name="Version2.7.2b"></a>Version 2.7.2-beta (10/11/93)</h2> - -<p>This version was distributed only to alpha testers. - -<h3><a name="V2.7.2b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - prfont.ps didn't print unencoded characters. - -Improves mergeini.ps to remove embedded comments. - -</pre><h3><a name="V2.7.2b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - An error occurring within the scope of an internal .stopped -didn't pop the command and error name off the stack. -* - The = and == procedures weren't re-entrant. - -* Adds a .writecvs operator that does a cvs to an internal string followed -by a writestring. - -</pre><h3><a name="V2.7.2b_Library"></a>Library</h3><pre> -Fixes bugs: - - grestore freed the path and the clip path in an order that -was likely to lead to memory sandbars. - - moveto + closepath didn't actually close the path. - - moveto + reversepath produced an empty path (no moveto). - - moveto + closepath + reversepath produced an extra lineto. - - reversepath didn't set the current point to the end (i.e., the -former beginning) of the last subpath. - -Adds a "planar" memory device. - -</pre> - -<h2><a name="Version2.7.1b"></a>Version 2.7.1-beta (10/4/93, not distributed to the public)</h2> - -<p>Like 2.7, this version was created to satisfy a contractual -requirement, -and will never be distributed to anyone other than the other party to the -contract. - -<h3><a name="V2.7.1b_Documentation"></a>Documentation</h3><pre> -Documents the GS_OPTIONS environment variable. - -Adds a summary of all environment variables to the documentation -(use.doc). - -Documents the existence of a third free viewer built on Ghostscript. - -</pre><h3><a name="V2.7.1b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - wrfont didn't wrap a systemdict begin / end around the body of -the font. - - wrfont wrote out the Symbol and ZapfDingbats encodings in a way -that only worked if the encoding was known by name. - -Changes bdftops to include an XUID if desired. - -Changes bdftops so that it uses 'show' for unknown ligatures, rather than -executing the characters as subroutines; this makes such ligatures work -properly with xfonts. - -</pre><h3><a name="V2.7.1b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The PCL drivers sent a printer reset (<ESC>E) at the beginning -of every page, instead of only before the first page. - - The PCX driver didn't round up the scan line width in the -header, even though it produced scan lines with the correct (rounded) -number of bytes. - -Adds a new map_rgb_alpha_color procedure. This is a backward-compatible -change; this procedure defaults to calling map_rgb_color. - -</pre><h3><a name="V2.7.1b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - On Unix platforms, the value of the TEMP environment variable -had to end with a '/'. - - On MS-DOS systems, printer output to devices other than PRN -(specifically, LPTn) didn't put the device into binary mode. - -Adds FPU_TYPE to the Unix makefiles, with a default value of 1. - -Removes the mention of Xmu linking problems on the SunOS platform, -since the problem no longer exists. - -Changes the order of X Windows libraries from Xt X11 Xext to Xt Xext X11. -This makes the OSF/1 linker happier. - -</pre><h3><a name="V2.7.1b_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - All the fonts originated by Aladdin, and the shareware fonts, -had UniqueIDs in the 4xxxxxx range, which is only supposed to be used for -limited-distribution fonts. -* - When Ghostscript loaded a font, it pushed a scratch dictionary -on the dictionary stack, rather than userdict. (Note that this fix also -requires fixing the fonts to include a protective systemdict begin / -end; see below.) -* - When loading a font failed, Ghostscript didn't check the font -name against the default font name properly. - - Ghostscript's own fonts didn't include a systemdict begin / -end to guard against redefinition of names used in the reading -procedures (e.g., index). -* - When Ghostscript scanned a .PFB font to get the FontName, it -didn't skip over the 6-byte header, which could cause confusion or a -syntaxerror. - - Loading a .PFB font that left extra information on the -operand stack didn't work. - -Changes the ZapfDingbats font to use DingbatsEncoding rather than include -a copy of the encoding in itself, if DingbatsEncoding is known. Changes -the Symbol font similarly. - -Removes eexec encryption from the 4 URW fonts, so they will work with -DISKFONTS. - -Adds shareware Hiragana and Katakana fonts (Calligraphic-Hiragana and -Calligraphic-Katakana, by Kevin Hartig). - -Adds GS on the end of the family names of all of Aladdin's own converted -fonts. - -Replaces many of the Hershey fonts with new ones (mostly Type 1) created -by Thomas Wolff, who added accents, accented characters, and other -non-alphabetics. These too now have proper UniqueIDs. - -</pre><h3><a name="V2.7.1b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: -* - imagemask interpreted the Decode array incorrectly (inverted). - - Running out of memory when constructing a path incorrectly -signalled a limitcheck rather than a VMerror. - - restore didn't purge uncached scaled fonts properly. - -Adds alpha (opacity) to the graphics state, and setalpha and -currentalpha operators. - -Redefines erasepage in terms of a new .fillpage operator that fills -the current page with the current color and then does a sync_output. - -Redefines setdevice and putdeviceprops in terms of new .setdevice and -.putdeviceprops operators that return a boolean indicating whether the -page needs to be erased. With this change, operators that erase the page -always call erasepage at the interpreter level rather than calling -gs_erasepage directly. - -</pre><h3><a name="V2.7.1b_Library"></a>Library</h3><pre> -Fixes bugs: - - The null device allowed its size to be reset. - - clippath didn't establish a current point if the clipping -path was empty. -* - The Type 1 font interpreter (gs_type1_interpret) flattened -curves even if it was being invoked for charpath. - - Colored halftones usually didn't come out with the correct -phase, and had several other problems. - - A show or charpath within a BuildChar procedure didn't work. - - Accented characters composed with seac used the base -character width instead of the composed character width. (The Adobe -documentation says these must be the same, but some commercial fonts -don't obey this.) - - setcurrentpoint in the accent of a character composed with -seac didn't take the accent's displacement into account. - -Adds an alpha (coverage) value to the graphics state, and -gs_setalpha/currentalpha procedures. Currently Ghostscript just passes -the alpha value to the driver; it doesn't attempt to emulate alpha -handling if the driver doesn't support it. - -Redefines gs_erasepage to call gs_fillpage. - -Bypasses the fill code if the clipping box is empty. This makes a big -difference for stringwidth, and doesn't hurt anything else. - -Changes frac_1 from 0x7fff to 0x7ff8. This allows exact representation of -practically all useful fractions, since this number (32760) is -2*2*2*3*3*5*7*13. - -Changes float to double in several matrix routines for better accuracy. - -Adds new device properties to implement the deviceinfo operator: -Colors, GrayValues, RedValues, GreenValues, BlueValues, ColorValues. -Also adds HWBitsPerPixel and HWColorMap. - -Changes the sorting algorithm for halftones to use qsort instead of -special code. - -Changes the Type 1 interpreter so that it uses the current point, rather -than (0,0), as the character origin. - -</pre> - -<h2><a name="Version2.7b"></a>Version 2.7-beta (9/20/93, not distributed to the public)</h2> - -<p>This is the first of a series of beta-only versions planned for -release -between 2.6.n and 3.0. This version, in particular, was created to -satisfy a contractual requirement, and will never be distributed to anyone -other than the other party to the contract. - -<h3><a name="V2.7b_Documentation"></a>Documentation</h3><pre> -Fixes bugs: - - The "HP XLFD extensions" to X11R5 are not specific to H-P -platforms. - - The configuration generation script used rm rather than rm -f. - - gs.1 was installed in $(docdir) rather than $(mandir); -$(mandir) wasn't defined. - - ansi2knr.1 was installed in $(docdir), which was -inappropriate because ansi2knr itself wasn't installed anywhere. - -Moves documentation for versions 2.4.x and 2.5.x to history.doc. - -Moves the documentation on how to add devices to the configuration -from devs.mak to make.doc. - -Changes the name of readme.doc to current.doc, since the presence of -two "readme" files was confusing to users. - -Documents how to use the Microsoft Windows PostScript printer driver -to convert TrueType fonts to Type 1 fonts embedded in the document. - -Corrects several errors in the documentation of the get_bits driver -procedure. - -Documents the fact that X11R3 is no longer supported. - -Removes the last references to "Ghostscript" from the comments in the -gs_*.ps files. The only remaining reference, other than the boilerplate -comments at the beginning of each file, is in the message at the end of -gs_init.ps. - -Documents the use of WMAKEL rather than WMAKE with the Watcom compiler. - -</pre><h3><a name="V2.7b_Procedures"></a>Procedures</h3><pre> -Fixes bugs: -* - The Unix install script used gs rather than $(GS) as the name of -the executable. -* - The Unix install script didn't copy gs_dbt_e.ps to $(gsdatadir). - - genconf.c used ps2 as a variable name; ps2 is a predefined -preprocessor symbol in the VSC compiler used by IBM. - - @-expansion didn't interact properly with -- and -+. - - The Unix install script didn't copy COPYING to $(docdir), -and copied README to $(gsdatadir) rather than $(docdir). - - ps2ascii used /bin/sh -f, which is an incorrect flag. - -Removes all uses and mentions of USG (a now-obsolete GNU convention) -as a synonym for SYSV. - -Removes filter.dev and dps.dev from FEATURE_DEVS if level2.dev is -included, since they don't add anything beyond level2.dev. - -Changes the ccgs script to explictly remove the old .o file before -doing the mv, for the benefit of people who have changed mv to prompt -before overwriting. Changes the configuration script to use rm -f -for the same reason. - -Changes the -Z switch so an empty list of options does nothing, rather -than turning on all options. - -Adds a -@ switch which is like -- and -+ except that it does -@-expansion of arguments. - -Changes genconf so it takes patterns from the command line that describe -how to write the linker control files, rather than having the patterns -built in. - -Changes -d and -D so that if no value is supplied, the default is -true rather than null. - -</pre><h3><a name="V2.7b_Utilities"></a>Utilities</h3><pre> -Fixes bugs: -* - The ps2ascii script still referenced ps2ascii.ps under its -old name gs_2asc.ps. -* - ps2image.ps had a 'pop' missing in the written-out -definition of 'max' in the boilerplate code it put at the beginning -of compressed files. -* - ps2image.ps got a typecheck if a scan line had no repeated -data in it anywhere. - - wrfont.ps didn't handle CharStrings or Subrs that weren't -strings. - - mergeini.ps produced an init file that incorrectly -attempted to load the Symbol and Dingbats encodings dynamically. - -Removes the gsview.bat file, since it was confusingly named and not -generally useful. - -Changes bdftops back to using encrypted CharStrings, for compatibility -with Adobe interpreters, but also changes lenIV to 0, to save a little -more space. - -Changes the traceop utility so it makes traced operators appear to be -operators, and so it will replace a definition in systemdict if explicitly -requested to do so and systemdict is writable. - -Adds a printafm utility for printing the metrics of fonts in AFM format. - -</pre><h3><a name="V2.7b_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The cdj driver was missing a few type casts that were needed to -satisfy pedantic compilers. - - For banded devices, many of the non-displaying target routines -were getting called with the original device as the first argument, not -the target device. (This didn't make any difference in practice, because -gdev_prn_open explicitly copied the non-rendering procedures back into the -procedure vector.) -* - The X driver didn't catch and discard bogus errors on -XFreeColors, which faulty servers generate. -* - The X driver gave up on color allocation too easily. -* - The X driver dynamic color table size could become negative. -* - x_lookup_font could return platform fonts of very small sizes, -which have very inaccurate metrics. -* - The ESCP/2 driver was incorrectly named gdevescp2 in devs.mak. - - The Apple DMP driver used #if 0 / #endif instead of comment -brackets, and was incorrectly named "dmp" instead of "appledmp" in -the source code. -* - The X driver didn't free dynamic colors at the start of each page. -* - The X driver didn't bind foreground/background defaults tightly. -* - The X driver didn't check for GHOSTVIEW_COLORS properly. -* - The X driver freed too many colors if an allocation request failed. -* - The X driver didn't check return value of gs_malloc for being NULL. -* - The DeskJet/LaserJet driver used an incorrect command for -end-of-page. -* - The DeskJet/LaserJet driver incorrectly reset the printer at the -beginning of every page. -* - The PCX driver put an old version number in the header, and -didn't pad scan lines to an even number of bytes. - - The BMP driver used a variable named `quad', which is a -reserved word on some platforms. -* - The TIFF driver didn't handle A4 or B4 size paper correctly. -* - The X11 driver incorrectly demanded the Xmu library, which was -not needed and which caused link errors on some versions of SunOS. -* - X11 font matching scheme was too loose, causing overlaps and -other problems. -* - X11 Font Extensions (rotated and mirrored fonts) did not work -properly on NCD terminals. -* - When freeing the rgb cube/gray ramp, the parameters to gs_free() -did not exactly match the parameters to gs_malloc(). -* - Ghostscript failed to warn the user when it could not allocate -the original color cube/gray ramp and dropped back to a smaller -cube/ramp, or from color to mono. -* - x_release could cause Ghostscript to fail if a font was freed -after the device was closed. - - The X driver continued to ask the server for colors even after a -request failed, causing colored images to display very slowly. - -* Adds a pcxgray driver to provide 8-bit gray scale output in PCX format. - -Adds a pcx24b driver to provide 24-bit RGB color PCX output. - -* Adds a LaserJet 4 driver. - -Adds a user-contributed driver for the DEC LA70 (very similar to the LA75). - -Substantially improves the performance of the PxM drivers by eliminating -an unnecessary copying step and by writing each scan line with a single -fwrite when possible. - -Moves the gray-scale and 24-bit RGB device color mapping routines to -gxcmap.c from gdevpcx.c and (nowhere). - -Allows window granularities smaller than 64K in the VESA driver. - -Changes the LaserJet margins again. - -</pre><h3><a name="V2.7b_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - Platforms where stat doesn't return a st_blocks value -computed the block count wrong. - - In gp_vms.c, the call on SYS$FILESCAN needed two uint *s -rather than a long * and a struct *. -* - The VMS script files referenced IBSCAN instead of ISCAN2, -and omitted GDEVXXF. -* - The UUENCODEd icons for the MS Windows platform were omitted -from the fileset. -* - On MS-DOS systems, filenameforall didn't interpret * alone -as a pattern matching all files. - -Adds wildcard matching capability to filenameforall under Unix. - -Removes gp_file_status from the platform interface, since all -platforms provide identical stat calls in the C library. - -Adds DesqView/X (using djgcc and go32) as a platform. - -Removes the S3 driver from the standard PC configurations. - -Adds documentation for compiling Ghostscript on the Intergraph Clipper. - -Updates the documentation to add a better list of X Windows font -names for the Sun platform. - -</pre><h3><a name="V2.7b_Fonts"></a>Fonts</h3><pre> - -Creates an external file (gs_dbt_e.ps) with the ZapfDingbats encoding -(actually in 2.6.1, but not documented there). - -Changes the names of the Cyrillic fonts to Shareware-Cyrillic-Regular -and Shareware-Cyrillic-Italic, keeping Cyrillic, Cyrillic-Regular, -and Cyrillic-Italic as aliases. - -* Removes the requirement that the FontName in the font file be the same -as the name in Fontmap. (This requirement led to the need for aliases, -and was extremely confusing to users.) - -* Adds a GS_FONTPATH environment variable containing a list of directories -that should be scanned automatically for fonts. - -* Gets rid of the Ugly font, and changes the default to the IBM Courier -font, which is freely distributable. - -</pre><h3><a name="V2.7b_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - cvs didn't check for stack underflow. -* - zht2.c didn't include alloc.h. -* - execstackoverflow cleared the e-stack instead of just -cutting it back. - - if and ifelse incorrectly reported typecheck instead of -stackunderflow. - - Copying a dictionary could alter some items even if a later -item causes an invalidaccess error because of an attempted store of a -local object into global VM. - - bitshift and cvrs assumed that longs occupied 32 bits. -* - exitserver didn't check the password, and always succeeded. - - Font loading didn't suppress all output messages if QUIET -was set. -* - The interpreter incorrectly pushed its exit procedure on -the e-stack if it was called again after an interrupt. -* - The interpreter didn't treat timeout like interrupt in -terms of re-executing the current operation. -* - `show' operators popped their operands before they were -sure they wouldn't be interrupted. -* - rotate with a matrix operand didn't check for multiples of -90 degrees. - - In the system name table, ge was misspelled eg, and -pathforall was misspelled pathfoall. -* - file_close_file attempted to free the buffer even if it was an -externally supplied string (specifically, the argument of gs_run_string). - - setprintername (in gs_statd.ps) set printername rather than -.printername. - -Implements additional Level 2 features: - - Indexed color space with lookup procedure. - - sethalftone, except for the transfer function override, - and currenthalftone. - -Implements OtherSubrs for indices greater than 3 (required for -MultiMaster fonts). - -Implements black generation and undercolor removal. - -Changes `store' from a C procedure to a PostScript procedure. - -Changes idiv back so it requires integer operands, per the Adobe -documentation but not per some old Adobe interpreters. - -* Adds many new paper sizes to gs_statd.ps. It now includes ISO a0-a10 -and b0-b10, and CAD sizes archA-archE. - -Implements `status' for non-%os% files. (This is currently a no-op, -but the framework is there.) - -Changes the error handler so it normally uses = rather than == to print -the operand stack, to avoid recursive errors. - -* Adds time slicing capability to the interpreter. - -Implements setcolorscreen/currentcolorscreen. - -</pre><h3><a name="V2.7b_Library"></a>Library</h3><pre> -Fixes bugs: -* - Rectangles with vertices specified in clockwise order were -drawn as 0-width lines. -* - The string matching function reported that 'abcdefg' -matched the pattern 'abcde'. -* - The bounding box of non-rectangular clipping paths was not -being marked as valid, so cached characters would simply get -discarded as being outside the bounding box. - - erasepage filled the page with the device's white color, -not with gray level 1 passed through the transfer function. -* - Colors with equal R/G/B or C/M/Y components were rendered -incorrectly if the 3 or 4 transfer functions were not all the same. -* - Because of a bug in rc_unshare, using CIE color would give -random errors (such as /invalidaccess in --for--). -* - setbbox didn't round the coordinates properly, which could -cause erroneous rangecheck errors with coordinates on the edge of the -box. -* - Color halftones "flipped over" at the 50% point, inverting -foreground and background. - - Quite a few places assumed that longs occupied 32 bits. -* - kshow passed an incorrect c1 value to the procedure. - - The debugging code in update_x_list in gxfill.c didn't take -into account the possibility that the active line at x_first might be -deleted. - - gx_image_cached_char called the xfont render_char procedure an -extra time if it failed with required=0 and succeeded with required=1. -(This was just a small inefficiency, not a logic bug.) - - Non-rectangular clipping regions weren't computed correctly, -because accum_add_rect didn't handle overlapping rectangles. - - Drivers didn't report file system errors (such as file system -full) as an ioerror. -* - setdevice didn't reset the charpath and setcachedevice flags. - - The Zortech compiler produced wrong code for the uid_equal -macro; uid_equal is now a procedure. - -Passes OtherSubrs arguments back to the caller correctly for indices -greater than 3. - -Implements black generation and undercolor removal. - -Removes gdev_mem_ensure_byte_order, which was no longer used or useful. - -Removes gstdev.c (device tracing), since it hasn't been used in a -long time and is of little value given a reasonable debugger. - -Changes the interface to the xfont char_metrics and render_char -procedures to allow them to return 1. - -Changes 32-bit memory devices so they use CMYK color mapping rather -than RGB mapping with an unused byte. - -Implements gs_setcolorscreen/currentcolorscreen. - -Implements Level 2 halftones, except for the transfer function override. - -Implements a hack to make zero-width rectangles display as one pixel wide, -to work around a bug in the Microsoft Windows PostScript driver. -Currently the hack only works for vertical lines, not horizontal ones. - -</pre> - -<hr> - -<h2><a name="Version2.6.1"></a>Version 2.6.1 (5/28/93)</h2> - -<p>This is primarily a bug-fix release for 2.6, with a couple of minor -additions. - -<h3><a name="V2.6.1_Documentation"></a>Documentation</h3><pre> - -Adds proper `man' pages ansi2knr.1 and gs.1. - -</pre><h3><a name="V2.6.1_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The Unix makefile produced an incorrect linker command if -EXTRALIBS was not empty. - - The Unix install commands didn't copy devices.doc, -ps2epsi.doc, and xfonts.doc to the documentation directory. - - echogs.c didn't include <sys/types.h>, which is needed for -time_t on some systems. - - malloc_.h used <malloc.h> rather than <stdlib.h> on -NeXTStep systems. - -Changes the configuration procedure to use a C program rather than -complex shell scripts. - -</pre><h3><a name="V2.6.1_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - The boilerplate produced by ps2image used the 'max' -operator, which is not a standard PostScript operator. - - The winmaps.ps utility had 'floring' instead of 'florin' in -the OEMEncoding table. - - quit.ps was omitted from the PC distribution. - -Changes the name of the dicttomark procedure to .dicttomark. - -Renames gs_2asc.ps as ps2ascii.ps, so it matches the names of the -script files. - -</pre><h3><a name="V2.6.1_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The pbmraw driver was writing out RGG instead of RGB values. - - The X11 driver used NULL in a place where it should have -used None. - - For multi-file output, the GIF driver didn't write a header -at the beginning of each file. - - The Epson driver didn't honor the -A4 compilation switch, -didn't put (0,0) at the physical corner of the page, and was too -liberal about using tabs instead of spaces. - -Replaces the color handling algorithms in the X Windows driver with -new, much better ones. - -Makes the PC display drivers recognize the -A4 compilation switch, -like the printer drivers. - -Adds new user-contributed drivers: - - A driver for Epson printers that use the ESC/P 2 control -language, such as the Stylus 800. - - A driver for the Apple Dot Matrix Printer and Imagewriter. - -Adds a new get_xfont_device driver procedure. This is a -backward-compatible change, since there is a sensible default. - -</pre><h3><a name="V2.6.1_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - On VMS, gconfig.h didn't have #include "gsconfig.h" as its -first line. - - gconfig.c compiled incorrectly on the RS/6000 because the -compiler evaluated a constant of the form (x<<y)+z incorrectly. - - Quite a few files that used the mem... functions didn't -include memory_.h, which caused trouble on some bsd4.2 systems. - - The definition of zfont_char_xglyph confused one of the AIX -compilers. - - On VMS, DEC C allows extra arguments for fopen, but gcc doesn't. - - On the MS Windows platform, 2.6 used gdevwddb rather than -gdevwdib; the latter is almost always faster. - - The PC .zip files didn't include the Windows .ICO and .RES -files in either GSEXE.ZIP or GSFILES.ZIP. - -On PC platforms, adds an option (FPU_TYPE=-1) to optimize for -machines lacking a floating point processor. - -</pre><h3><a name="V2.6.1_Fonts"></a>Fonts</h3><pre> - -Adds 4 new fonts contributed by URW. These have a URW copyright and -are governed by the GNU License. - -Documents the fact that font names in Fontmap can be strings, not -only names. - -Adds DingbatsEncoding as a predefined encoding (in addition to -Standard, ISOLatin1, and Symbol). - -</pre><h3><a name="V2.6.1_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - memchr (used in zfile.c) isn't available on all platforms. - - languagelevel was defined as an operator rather than an -integer. - - iccfont.c referred to name_StandardEncoding instead of -#include'ing font.h and referring just to StandardEncoding. - - The CCITTFaxDecode filter didn't work on 32- (or 64-) bit -machines, because of a bug in more_bits(). - - The structures recording an allocation within the scope of -a save could get allocated unnecessarily, because they weren't -properly marked as free when an array was freed. - -Renames the following Ghostscript-specific operators by adding a '.' -at the front: makeoperator, setdebug, setmaxlength, stringmatch, -type1decrypt, type1encrypt. - -Adds a real implementation of glyphshow. - -</pre><h3><a name="V2.6.1_Library"></a>Library</h3><pre> -Fixes bugs: - - Discarding fractional character coordinates in the Type 1 -rasterizer led to some rendering anomalies (e.g., characters 1 pixel -too high). - - If a font had a non-standard encoding (i.e., not -StandardEncoding, ISOLatin1Encoding, or SymbolEncoding), Ghostscript -would never invoke the platform font code. - - The RGB to HSB color conversion algorithms produced -nonsensical values. - - struct cached_char_s was defined redundantly in gxcdir.h, -causing compilation problems on some systems. - - 32-bit color devices didn't work properly on little-endian -machines (arrange_bytes in gdevmem2 was wrong). - - The scaled font cache could confuse two fonts with the same -UniqueID and different Encodings. - - Under many common circumstances (first use of a character -was with stringwidth, the font was renamed, the font encoding was -changed), xfonts would not be used. - -Adds gs_glyphshow. - -</pre> - -<h2><a name="Version2.6"></a>Version 2.6 (5/9/93)</h2> - -<p>The main new feature in this release is the ability to use platform -fonts. It also adds many more Level 2 PostScript facilities. - -<h3><a name="V2.6_Documentation"></a>Documentation</h3><pre> - -Corrects some errors in the documentation of the makeimagedevice operator. - -Adds operand and result types to the comments at the beginning of all the -operators. - -Adds new sections on installation in use.doc. - -Reinstates history.doc as a repository for old and no longer interesting -history information. - -Adds a new file, devices.doc, with documentation for specific devices. - -Points out that font2c must be run with a Fontmap that includes the fonts -being converted, and that its arguments must be quoted with "" on VMS -systems. - -Notes that the font name in the Fontmap must be the same as the FontName -in the font. - -Adds a list of the Level 2 facilities not provided by Ghostscript. - -Identifies bug-ghostscript@prep.ai.mit.edu as an alias for the -gnu.ghostscript.bug newsgroup. - -Points out explicitly that -sOutputFile=- sends output to stdout, and -requires using the -q switch. - -Documents the use of tar_cat to construct the Unix makefiles. - -Adds a new file, xfonts.doc, that describes the external font interface. - -Documents the fact that drivers must use gs_malloc and gs_free rather than -malloc and free. - -Documents the *.sh (shell script) files. - -Adds brief documentation on some additional development tool .ps files. - -Documents the TEMP and GS_OPTIONS environment variable. - -Points out the need to run Windows in 386 Enhanced mode on machines -that have less than 6 Mb of RAM. - -Consolidates documentation on compiler switches in make.doc (some of -it had been in the unix*.mak files). - -</pre><h3><a name="V2.6_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - \'s in arguments following -- were doubled. - -Includes the full set of filters automatically if the level2 feature -is selected. - -Extends DEVICE_DEVS... up to DEVS9. Adds DEVICE_DEVS1 as well. - -Renames turboc.mak and tbcplus.mak as tc.mak and bc.mak. - -Makes @-files use the library path (GS_LIB, -I). - -Changed the Unix install script to use install <file> <destfile> -rather than install <file> <directory>. - -Adds a GS_OPTIONS environment variable that acts like an implicit @-file -at the beginning of the command line (i.e., may contain switches and -initialization files). - -Renames sym__enc.ps as gs_sym_e.ps. - -Adds a user-contributed shell script for using Ghostscript with an -H-P printer spooler. - -Adds level1.ps to the set of installed utility files. - -Extends the TEMP environment variable (the directory for scratch -files) to work on Unix as well as MS-DOS. - -Changes the MS Windows makefile to generate gswin.exe rather than -gs.exe, and the Watcom makefile to generate gs386.exe. - -Moves the "product" string from gs_init.ps to iinit.c. - -Adds a GS macro to the makefiles, to allow choosing the name of the -executable. - -</pre><h3><a name="V2.6_Utilities"></a>Utilities</h3><pre> -Fixes bugs: -* - font2c did the wrong thing (still) for fonts that didn't -use StandardEncoding, ISOLatin1Encoding, or SymbolEncoding. -* - impath.ps had a fatal bug (wrong operand order for -charstack_write) that caused bdftops to fail. - - gslp didn't wrap or truncate lines. - - gslp didn't handle tabs in a second or subsequent column -properly. - - The definition of ashow in gs_2asc.ps incorrectly undid the -increment following the last character. - - The definition of awidthshow in gs_2asc.ps failed to pop -two entries from the stack, and also tested the character against the -wrong value. - -Adds a shell script (sysvlp.sh) that interfaces Ghostscript with the -System V 3.2 lp interface. - -Adds ps2ascii and ps2epsi script/batch files. - -Adds a new utility, mergeini.ps, for concatenating all the -Ghostscript initialization files into a single file, optionally -removing comments and blank lines. - -Adds new switches to gslp: - -q: suppress all printed output. - --detect: check whether the file begins with %!, and if so, - interpret it directly as a PostScript file. - --first-page <page#>: replaces the former -P switch. - --last-page <page#>: replaces the former -Q switch. - --(heading|footing)-(left|center|right) <string>: define - headers/footers. # inserts the page number. - --margin-(top|bottom|left|right) <inches>: define margins. - --spacing <n>: for double, triple, etc. spacing. -Also makes gslp ignore all the enscript flags it doesn't implement. - -Adds an option to wrfont.ps to do encryption at read-in time. (This -allows much better compression of the standard Ghostscript fonts.) -Changes bdftops to use this option. - -Changes gslp to accept wild cards in file names. - -Replaces landscap.ps with a new one contributed by a user. - -Changes the compression scheme used in ps2image to a much more -effective one. Writing images is much slower than with the previous -scheme, but reading is not. - -</pre><h3><a name="V2.6_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - SCFDTAB and SCFTAB were omitted from the VMS module lists. - - Function prototypes were not being used with the Watcom -compiler. - - On MS-DOS platforms, if the value of the TEMP variable had -a trailing : or \, Ghostscript appended a \ anyway. - - Under Windows, changing the size or resolution of the image -closed and reopened the window. - - Ghostscript would not build correctly with the Watcom compiler -if DOS4G=quiet was not set, because the DOS4GW copyright message was sent -to stdout. -* - Finally gets Ghostscript to run properly on the RS/6000, by -adding a compiler bug workaround to arc_add and arc_either. -* - Finally gets Ghostscript to compile properly on Sun SPARC -systems, by adding a compiler bug workaround in scan_number. - -Changes the default MS-DOS configuration from 8086/8088 to 80286. - -Adds all the SuperVGA drivers to the BC++ and Watcom executables -(except for the VESA driver in the Watcom executable). - -Adds a makefile (msc.mak) for the Microsoft C/C++ 7.0 platform. This -is currently a MS-DOS, not a MS Windows, platform. - -Changes gp_enumerate_files_init so it takes a gs_memory_procs *, not -separate proc_alloc_t and proc_free_t arguments; also, it must -enumerate precisely the requested set of files, not a superset. THIS -IS A NON-BACKWARD-COMPATIBLE CHANGE. It affects all gp_*.c files. - -Adds the P*M drivers and bit.dev to the standard configuration on -Unix platforms. - -Changes the Watcom makefile so it uses the WATCOM environment variable (by -default) as the base directory for the Watcom executables. - -Adds the MS Windows COMMDLG.DLL and SHELL.DLL files to the set of -files incorporated in GSEXE.ZIP, since the new MS Windows code uses -them, and they aren't provided with Windows 3.0. - -Makes major revisions to the MS Windows platform and driver code, to -support the gsview front end, and also to remove the dependence on the -Borland EasyWin library. NOTE: Compiling the MS Windows code now requires -Borland C++ 3.1 (not 3.0). - -Changes time_.h so that Ghostscript will compile and run on A/UX. - -Changes the MS-DOS implementation of file enumeration so it always -treats \s in the file name as literal characters, not escapes, unless -there are two \\s in a row. This does the most sensible thing given -the DOS file naming conventions. - -Adds a %pipe% file device under Unix. - -Adds a makefile for Watcom C under MS Windows. This is very preliminary; -in particular, NO display output is supported. - -</pre><h3><a name="V2.6_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - fonts.mak referred to ncri and puti rather than ncrri and -putri. - - cyr and cyri had the wrong protection. - - The Hershey fonts left the font on the stack when they were -loaded. -* - The FontName of an aliased font was the original FontName -from the file, not the alias. -* - Fontmap.BTS had incorrect entries for AvantGarde-Demi and -AvantGarde-DemiOblique. - - Ghostscript pushed userdict, rather than an empty writable -dictionary, onto the stack when loading a font, leading to name clashes. - -Adds a new cfonts.mak with a full set of rules for compiling all the -standard Ghostscript fonts (except the Hershey fonts) into C. - -Adds UniqueIDs to the Hershey fonts, and removes the UniqueIDs from -the Hershey entries in the Fontmap. - -Adds a new Fontmap for VAX/VMS with DECWindows/Motif. - -Changes MakeHersheyFont so it takes the encoding as an additional -parameter, and changes the Hershey-Symbol font to use SymbolEncoding. - -</pre><h3><a name="V2.6_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The !@*&^%#@$ PCL drivers *still* didn't do the right thing -about vertical spacing: the <ESC>*p+<n>Y command works on all PCL 3, -4, and 5 printers *except* the LaserJet IIp. - - The cdj driver used recursive macros (height, t_margin, -b_margin) that not all compilers handled correctly. - - The djtc driver used some assignments including =*, which -some compilers dislike. - - The S3 driver wouldn't compile correctly with the Watcom -compiler. - - The makefile entry for the S3 driver was wrong. - - The SuperVGA drivers returned an error, rather than using -the highest available resolution, if a too-high resolution was -requested. - - The GIF driver produced an incorrect header for images -wider or taller than 32K pixels. - - The GIF driver wasn't able to handle multi-page documents -correctly. - - The margins on the DeskJet were still not correct. - - Some ANSI C compilers rejected a complex expression in -gdevpccm.c. - - Printer drivers didn't recover cleanly from problems in -opening the scratch files. - - The BJ-10e driver used the same name `out' for a label and -a variable. - - The SCO ODT compiler couldn't handle sizeof(ppdev->fname). - - The Epson driver used the wrong value for ESC in the -initialization string. - -Adds new drivers: - - Drivers to produce MS Windows .BMP format output. - - A new ATI Wonder display driver (800x600, 16 colors) and a -1024x768 mode for the existing driver. - -Adds new user-contributed drivers: - - A driver for the Tektronix 4693d color printer. This carries a -university copyright. - - A driver for the SPARCprinter. - - A driver for the Canon BJ200 printer. - - A driver for the IBM ProPrinter. - - A driver for the DEC LJ250 printer, which has a -PaintJet-compatible mode. - - A replacement driver for the Sony NWP533. - - A driver that writes TIFF/F (Group 3 fax) files. This carries -an external copyright. - - A driver for the C.Itoh M8510 printer. - - A driver for the Okidata MicroLine 182 9-pin dot-matrix printer. - - A Hercules Graphics driver. - - A driver for printers under MS Windows. - - A driver for direct frame buffer addressing under SCO Unix -and Xenix and AT&T SVR4. - -Changes the get_bits driver procedure so it always reads a single -scan line, and optionally does not copy the data. THIS IS A -NON-BACKWARD-COMPATIBLE CHANGE. However, this change does not affect -any existing printer driver, since these all go through intermediate -routines in gdevprn.c. - -Changes gdevprn.h, and the relevant printer drivers, so that -DA4 -will change the default paper size for any printer driver. - -Allows the use of NULL or 0 for default procedures in the driver -procedure vector. - -Adds an optional map_cmyk_color procedure to the driver procedure -vector. - -Changes the Epson driver so that the minimum amount of white space -required to use a tab is an easily changed parameter. - -Changes the BGI driver to use separate segments for the Borland -device drivers, to reduce the risk of overflowing a segment. - -Adds an optimization option (normally enabled) to the PGM and PPM drivers -such that they revert to PBM or (for PPM) PGM if the page can be -represented that way. - -Adds a new (optional) driver procedure to get the procedure vector -for external fonts. - -Adds an argument to gp_open_printer to indicate whether the file should be -opened in binary or text mode. THIS IS A NON-BACKWARD-COMPATIBLE CHANGE. -However, this change does not affect any existing printer driver, since -these all go through intermediate routines in gdevprn.c. - -Changes the LN03/LA50/LA75 driver so it uses a text record mode to open -the output file under VMS (by adding an argument to gp_open_printer to -indicate this.) - -Allows (indeed, encourages) drivers to use far_data to declare the device -structure, primarily to avoid overflowing the 64K data segment under MS -Windows. Changes the file output drivers and many of the printer drivers -to declare their device structures as far_data. - -Replaces the AT&T 3B1 driver with an updated version (from the same -contributor). - -Changes the Epson BJ driver and the SPARCprinter driver so they align -the (0,0) point of the page with the physical corner of the paper -rather than with the origin of the printable area. - -Removes the EIZO MDB-10 driver, since it caused complications for the -EGA and VGA drivers and is not a widely used device. - -</pre><h3><a name="V2.6_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The entry for the copydevice operator in the operator table -was initialized incorrectly. - - printobject and writeobject didn't handle nested arrays. - - restore didn't properly close the current file (if -appropriate), causing an invalidaccess error. - - buildfont required the presence of a valid, 4-element -FontBBox. (The Red Books say it's required, but Adobe interpreters -don't require it; some DEC software generates a 3-element FontBBox.) - - resourceforall had several bugs; it didn't do even -approximately the right thing. There were quite a few other problems -with the implementation of resources. - - setfont, makefont, and scalefont would accept a font with -no FID entry. -* - Loading a .PFB font left the file open (until the next -restore or quit). - - The default (null) font didn't include a PaintType entry, -which some PostScript files expected. -* - The ASCIIHexDecode filter sometimes thought the underlying -stream was at EOF even when there was (at most one buffer's worth of) -data left. - - iscan.c included <ctype.h> before std.h, causing type name -clashes on some systems. -* - save and restore didn't handle the pointers in the graphics -state correctly; for example, the current font wasn't restored -properly. - - Binary object sequences at the top interpreter level didn't -get executed immediately. - - On high-resolution devices, the default transfer function -converted almost-white grays to very light grays rather than white. - - The `string' operator was checking the string length -against max_uint rather than max_ushort, which could cause invalid -lengths to be accepted. -* - deviceinfo caused a stackunderflow error. -* - idiv could give incorrect results for quotients or -remainders that didn't fit in 24 bits. -* - The ASCII85Encode filter padded trailing bytes with 1's -rather than 0's. -* - The ASCII85Decode filter had a typo that produced incorrect -results if there were exactly 2 trailing bytes. - - findlibfile didn't push a copy of the file name if it was -the name of a special (%) file. - - setduplexmode was not defined in statusdict, causing -/undefined errors from some poorly designed input files. -* - The CCITTFaxDecode filter had several bugs in 2-D decoding. -* - The ASCII85Decode filter didn't read ahead to detect EOD if -it fell precisely on a buffer boundary. - - If a file mentioned on the command line redefined `start', -Ghostscript would run the new definition rather than the built-in one -after processing all the files on the command line. - - The SCO ODT compiler couldn't handle the conditionals in the -ngetc (iscan.c) and sgetc* (stream.h) macros. - - makefont and scalefont didn't cache the PostScript dictionaries -for scaled fonts. - - Changing the elements of the Encoding of a font dynamically -didn't take effect if the character was already cached. - - makefont and scalefont didn't add the (undocumented) OrigFont -and ScaleMatrix entries to the new font. -* - findfont insisted that the font name be a string or a name. - - filenameforall could cause an incorrect transfer of control -if no files matched the pattern. -* - ISOLatin1Encoding had hyphen instead of minus at code 45. - - restore didn't reset saved_cbot and saved_ctop correctly; -as a result, some freed blocks could get abandoned rather than put on -the free list. - - Some numerical constants in zarith.c assumed that longs -occupied 32 bits. - -Implements additional Level 2 features: - - %device%file names (only the "os" device is provided). - - <~ ~> for ASCII-85 strings. - - Binary error messages. - - BuildGlyph. - - CCITTFaxDecode filter entries EndOfBlock, Rows, and - (undocumented) FirstBitLowOrder. - - {set/current}{color/colorspace/overprint/colorrendering/ - blackgeneration/undercolorremoval}. (See below under library - for limitations.) - - Decode for the dictionary form of image. - - File access modes a, r/w/a+. - - Font entries CDevProc, Metrics2, and WMode. - - Font operators cshow, findencoding, rootfont, and - setcachedevice2. - - glyphshow (emulated with PostScript code). - - languagelevel. - - realtime. - - setbbox. - - (Subset of) system and user parameters. - - xshow, yshow, and xyshow. - - XUIDs for fonts. - -Moves the installation of systemdict and the initial allocation of -globaldict (if relevant) and userdict from gs_init.ps to iinit.c. - -Makes Level 2 features dynamically selectable through the -.setlanguagelevel operator; disables all Level 2 features -(specifically including automatic dictionary expansion) unless the -level2 feature is included and active. - -Adds the .knownget operator for speeding up system procedures. - -Renames the type1addpath operator as .type1addpath; adds an optional -left side bearing argument; changes it so it does not do the -setcachedevice, fill, or stroke, but does do a moveto for the -character width. Changes Type1BuildChar appropriately. (All this is -needed to make WMode work.) - -Removes the .setmetrics operator, which is no longer needed. - -* Changes the meaning of the user_errors argument to gs_run_file and -gs_run_string so that -1 means always return on an error, 0 means -only return on an error not within a `stopped'. - -Adds all the necessary checks and operators for local/global VM, but -doesn't actually implement local/global mode. - -Changes setcachedevice back so that it requires 4 numbers on the -stack rather than a 4-element array. (It was changed to be the other -way in release 2.0, but that was because I didn't realize that fonts -had to have an executable FontBBox, and some of the Ghostscript fonts -didn't.) - -Changes all the filter operators from .filterxxx to .filter_xxx, and -removes the need to enumerate them in gs_init.ps. - -Adds .oserrno and .oserrorstring operators for getting the last OS -error (in the current context). - -Changes gs_finit similarly to gp_exit. Adds gs_exit_with_code that -takes both an exit status and a Ghostscript error code. - -Changes the name of name.h to iname.h. - -Adds support for the `interrupt' error (but doesn't provide any standard -way of generating one, other than through the gp_check_interrupts polling -function). - -Adds copyright to systemdict. - -Changes the spot halftone screen to an elliptical screen supplied by -Berthold K. P. Horn. - -Adds a check that the first token in gs_init.ps is an integer. In -conjunction with other code in gs_init.ps, this should catch all attempts -to run Ghostscript with a gs_init.ps that doesn't match the executable. - -Changes all relevant occurrences of sizeof to size_of in order to -work with the buggy SVR4.2 C compiler. - -Changes gp_exit so it is passed both the Ghostscript error code and -the exit status code as arguments. This is backward-compatible for -all but the pickiest compilers. - -Adds a call on gp_check_interrupts() after fwrite calls in the stream -machinery. This prevents lengthy console output from locking out -other programs. - -Changes a couple of occurrences of op_def_ptr in iinit.c to work around a -`const' bug in Sun's SC1.0 compiler. - -Adds a special hack in the 'where' operator to work around a bug in Aldus -Freehand 2.x. - -Changes all empty argument lists from () to (void), which is the ANSI -C syntax. - -Adds a hack to ignore ^[ and ^D^[ tokens, to work around the prologue -and epilogue emitted by the MS Windows LaserJet IV driver. - -Defines the processcolors operator, which should not be needed, but -is required because of bugs in Lotus 1-2-3 and Adobe PhotoShop. - -Changes the allocator (ialloc) to fill all allocated and/or freed -blocks with a marker if gs_alloc_debug is set, as gs_malloc and -gs_free already do. - -</pre><h3><a name="V2.6_Library"></a>Library</h3><pre> -Fixes bugs: - - 16-bit memory devices stored the bytes of each pixel in the -wrong order. - - copy_mono did the wrong thing when copying 1 source chunk -to 2 destination chunks with polarity inverted. (This probably -didn't affect any actual uses of Ghostscript.) -* - The compile-time check for ints being 2 or 4 bytes used the -#error directive, which most compilers don't recognize. - - arc and arcn didn't do the right thing for degenerate -(single-point) arcs, or for arcs drawn in the "wrong" direction that -were multiples of 360 degrees. - - charpath did the wrong thing with Type 3 fonts. - - copyscanlines gave an error if the buffer was too large. - - The copy_mono procedure (used for text and halftones) for -2- and 4-bit-per-pixel memory and printer devices incorrectly -incremented the destination pointer after every pixel, instead of -only after every byte. - - The fill_rectangle procedure (used for graphics) for 2- and -4-bit-per-pixel memory and printer devices, if given any color other -than all 0's or all 1's, multiplied the X coordinate and width by 2 -or 4, thereby filling the wrong area. - - The use of 'data' in both gs_type1_data and gs_font upset -the VMS compiler. - - The `Flex' feature wasn't implemented for Type 1 fonts, -which caused serious errors in rendering some fonts that use it. -(Unfortunately, some Adobe fonts violate the specification, so we had -to implement Flex to always use a curve.) -* - Stem width adjustment was too eager, producing very strange -effects on small characters with tight curves (a curve point could -get snapped to the other side of the open area). - - The allocator didn't align structures adequately on -machines where sizeof(long) or sizeof(char *) was 8 bytes. - - The test for IEEE floating point gave an incorrect -(negative) result on machines where sizeof(long) was 8 bytes. - - genarch.c assumed that the result of subtracting two -pointers was an int, leading to a garbage arch.h file on systems -where this was false. -* - The Type 1 font interpreter incorrectly reset the adjusted -path position to be the same as the unadjusted path position whenever -it returned control to the client (in particular, for callothersubr), -leading to discontinuities and distortions in the character shapes. -* - Accented characters in Type 1 fonts often misplaced the -accent to the left. - - gsmisc.c wouldn't compile on machines with 64-bit pointers, -because _pad was 0, and ANSI compilers don't accept 0-length arrays. - - pathforall got confused if the client procedures modified -the path. - - The command list file representation limited X and Y -coordinates to 15 bits. -* - stroke could produce spikes or other garbage for mitered -joins as a result of stroke adjustment. - - The params_size field of the null device was wrong, so -scaling the null device produced unpredictable results. - -Changes monobit memory devices to always store data big-endian. This -eliminates byte-swapping, at the cost of slightly slower rendering. - -Removes the memswab* routines, since they are no longer needed. - -Implements gs_cshow_[n_]init, which provides support for cshow, and -gs_xyshow_[n_]init, which provides support for {x,y,xy}show. - -Adds an optional left side bearing argument to gs_type1_interpret. - -Changes gs_type1_interpret so it does not do a setcachedevice, fill, -or stroke, but only appends the character outline to the path -(including a moveto for the character width.) - -Removes gs_setmetrics, which is no longer needed. - -Implements gs_setcachedevice2, which provides support for -setcachedevice2. - -Speeds up gsave/grestore by allocating, deallocating, and copying as -much as possible of the graphics state in a single operation. - -Implements gs_{set/current}{color/colorspace/overprint/colorrendering/ -blackgeneration/undercolorremoval}. Device, indexed (with table, not -with procedure), CIE, and (substituted) separation colors are -supported; some of the setup code for patterns is also present. - -Increases the size of temporary file names in gdevprn.h from 30 -characters to 60. - -Changes the character cache to be allocated dynamically in chunks. - -Splits gxcache.c into gxccache.c (fast "hit" code) and gxccman.c (all -other code). - -Changes all occurrences of sizeof to size_of in order to work with the -buggy SVR4.2 C compiler. - -Adds a new concept of "external fonts", which allow a driver to -substitute its own fonts for the ones obtained through the normal -font machinery. - -Changes all empty argument lists from () to (void), which is the ANSI -C syntax. - -</pre> - -<hr> - -<h2><a name="Version2.5.2"></a>Version 2.5.2 (9/20/92)</h2> - -<p>This is yet another bug fix release to (finally!) get the PCL drivers -working again. - -<h3><a name="V2.5.2_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The comment in devs.mak for cdjcolor said it used 8 bits -per pixel, rather than the correct 24. - -Adds gsbj/dj/lj/lp and gslp.ps to the installed files on Unix -systems. - -Removes dps.dev and level2.dev from the standard configurations on -all platforms, since the presence of the setcolor operator was -causing the output of some common applications to fail. - -</pre> - -<h3><a name="V2.5.2_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - font2c produced invalid output for any font that didn't use -StandardEncoding or ISOLatin1Encoding. - -</pre> - -<h3><a name="V2.5.2_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - gp_sysv.c required an extern long timezone. - -</pre> - -<h3><a name="V2.5.2_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The PCL drivers were *still* doing the wrong thing about -zeroing the seed row for Mode 3 compression. - - Setting the resolution with -r didn't work under Windows. - - The Windows driver got a stack overflow if it was ever -asked to display a bit image wider than 32 pixels. - - The Tseng driver didn't sense the model (ET3000 vs. ET4000) -correctly. - -Adds the eps9high device to the standard MS-DOS makefiles. - -</pre> - -<h3><a name="V2.5.2_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - gs_run_string used gs_user_errors (a global) rather than -user_errors (its argument) to control error handling. (This does not -affect normal operation of Ghostscript, only use as a server.) - - eexec popped the top element of the dictionary stack -afterwards even if the encrypted code had pushed something onto it. -This caused problems for some badly written PostScript code. - - The printed form of real numbers didn't always include a -decimal point, causing compatibility problems. - -Makes -s and -d work for device properties. - -Increases the cache limit on large-memory systems. - -Adds a check to ensure that the revision of gs_init.ps matches that -of the interpreter. - -Adds the .knownget operator. - -</pre><h3><a name="V2.5.2_Library"></a>Library</h3><pre> -Fixes bugs: - - The raster computation in clist_render_init, and the -computation of state_size in clist_open, didn't widen an operand to -long, leading to possibly incorrect operation for 24-bit-per-pixel -printers on MS-DOS systems. - - The flatness was set too large for Type 1 characters, -leading to visible straight edges instead of curves at large sizes. - - Type 1 fonts that contained out-of-range coordinates would -produce garbled output. (This was not a problem with the standard -Ghostscript fonts, or with Adobe Type Manager fonts.) - - gschar0.c wouldn't compile, because it referred to a -non-existing structure member penum->chr. (This had no effect on -Ghostscript's operation.) - - The curve flattener required line segments to be no more -than 8 x the flatness in length, leading to an enormous number of -segments. - - pathforall would cause an addressing fault if the path -consisted of only a moveto. - -Refactors some header files so that std.h is always included before -any system header file that might include sys/types.h. - -Adds logic for removing top and bottom blank rows in cached -characters. (This is the beginning of compression for the cache.) - -Changes the arguments of memswab2/4 from char * to byte *, for more -accurate type conformance. - -</pre> - -<h2><a name="Version2.5.1"></a>Version 2.5.1 (9/11/92)</h2> - -<p>This is the usual bug fix re-release. - -<h3><a name="V2.5.1_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The makefile rules for compiled fonts had a circular -dependency. - - `make begin' didn't work properly on all platforms. - -Ensures that all batch files end with a newline. (The absence of the -newline was confusing the GNU diff program.) - -Documents the fact that the -dASCIIOUT switch no longer exists. - -</pre><h3><a name="V2.5.1_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - pstoppm didn't `bind' its internal procedures. - - grestoreall would undo the output device selected by -pstoppm. - -Changes the utilities for reading and writing Type 1 character -outlines so they can work with stack representations as well as -arrays. - -Removes the pfbtogs.ps, phonbook.ps, and showpbm.ps utilities from -the distribution. - -Adds a gslj utility to parallel gslp and gsdj. - -</pre><h3><a name="V2.5.1_Platforms"></a>Platforms</h3> - -<pre> -Adds the DeskJet 500C drivers (cdeskjet/cdj*) to the MS-DOS / Borland -C++, MS-DOS / Watcom C/386, and MS-Windows configurations. - -Removes the PCX file driver from the MS Windows executable, because -the static data segment exceeded 64K. - -Makes some changes in the Unix System V platform file (gp_sysv.c) and -in time_.h and unixtail.mak to accommodate the 3B1. - -</pre><h3><a name="V2.5.1_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - The Charter-Italic font was named bchi.pfa rather than -bchri.pfa. - - The Cyrillic fonts (cyr.gsf, cyri.gsf) were omitted from -the fileset. - - Ghostscript incorrectly assumed that all Type 1 fonts had a -FontInfo dictionary. - - .loadfont used false PFBDecode, so a few .PFB fonts would -get errors because the first eexec byte would be whitespace. - -Changes font2c and its supporting code so that compiled fonts are -location-independent. - -</pre><h3><a name="V2.5.1_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The margins for the H-P printers were still wrong. - - The H-P drivers accidentally cleared the compression seed -row when switching compression modes. - - Some of the H-P drivers used the wrong control codes for -skipping blank lines. - -Adds user-supported drivers for the AT&T 3B1 console device, and for -the NEC P6+ printer. - -Updates the SunView driver with a new version supplied by a(nother) -user. - -Changes the X Windows driver so the Ghostscript window doesn't get -input focus. - -Changes the common code for the printer drivers so that if it can -allocate a full bitmap but there isn't at least a minimum amount of -memory left afterwards, it switches to banding. - -Changes the Windows driver so it handles devices with more than 8 -bits per pixel. (We haven't been able to test this.) - -Adds a read-only PageCount device property (for printer devices -only). - -Changes all Aladdin-supported drivers to clip drawing requests to the -((0,0), (width,height)) rectangle of device space. - -</pre><h3><a name="V2.5.1_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - Closing a NullEncode filter always gave an ioerror. - - If a single-character name occurred 1 character before the -end of an input buffer, the character would be doubled. - - The procedures in gs_statd.ps didn't use "bind". - - Setting the page size didn't work properly with devices -with rotated coordinate systems. - - If an error occurred, and the error object wasn't the last -element of its procedure, the interpreter would re-execute the error -object after running the error handler. - - Memory devices didn't get resized if HWSize was changed, -leading to out-of-bounds memory accesses. - -Moves revision and revisiondate from gs_init.ps to iinit.c. Adds a --v switch that just prints these out. - -Arranges things so that if Ghostscript is reading from a pipe (`-' -switch on the command line) and encounters an error, it exits with -status 1 rather than 0. - -Changes the interpreter interface so the caller explicitly passes a -pointer for storing an error object. - -</pre><h3><a name="V2.5.1_Library"></a>Library</h3><pre> -Fixes bugs: - - The automatic adjustment of the scaling for variant paper -sizes caused the image to get expanded when it should have been -contracted, and vice versa. - - The curve flattener insisted that each line segment be no -more than 2 x the flatness in length, leading to an enormous number -of segments even when not necessary for accuracy. - - flattenpath and strokepath discarded a trailing moveto. - - strokepath treated "0-width" lines as really having a width -of zero, rather than one pixel. - - Buffered devices weren't closed and reopened if the amount -of buffer space was changed. - - stroke used the line cap at the beginning of each subpath -even if the subpath was closed. - -Removes the requirement that the clipping rectangle fall in the -non-negative quadrant of device space. (This was causing problems -for Ghostview, but removing it required adding the extra clipping -step to the drawing routines in the drivers.) - -</pre> - -<h2><a name="Version2.5"></a>Version 2.5 (8/18/92)</h2> - -<p>This version adds Type 1 hinting, CCITTFax encoding and decoding, and -Microsoft Windows support, as well as the usual minor improvements -and bug fixes. - -<h3><a name="V2.5_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - GSIMPATH, SLZWD, and SLZWE were omitted from the VMS -makefiles, and GSIM2OUT was not removed. - - landscap.ps messed up the current path. - -Adds new switches: - -dSAFER disables file writing and directory modification. - -dESTACKPRINT causes errors to print the execution stack with -== instead of =. - -sOutputFile=<string> replaces -sOUTPUTFILE (which is still -recognized) for setting the output file or pipe for the default -(printer) device. - -sPAPERSIZE=<sizename> initializes the paper size. - -dBufferSpace=<number> sets the buffer size for the default -(printer) device. - -For Unix systems, changes the directories in GS_LIB_DEFAULT from -`pwd` to $(gsdatadir), i.e., normally $(datadir)/ghostscript, where -datadir is normally /usr/local/lib. - -Adds a note in the header file to the effect that the X Windows -driver expects to find header files in $(XINCLUDE)/X11, not in -$(XINCLUDE). - -Changes -q so it defines QUIET as true instead of null (so it can be -used in the middle of the command line as well as at the beginning). - -Renames the history.doc file as NEWS. - -</pre> - -<h3><a name="V2.5_Utilities"></a>Utilities</h3> - -<h3><a name="V2.5_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - The stack size was not getting increased on the Watcom -platform. - -Removes "b" from the scratch file opening modes in gp_unix.c and -(conditionally) in gdevprn.c, to pacify the DECstation Ultrix system. - -Adds a makefile (bcwin.mak) and a platform file (gp_mswin.c) for -Microsoft Windows. - -On MS-DOS platforms (including Windows), uses the TEMP environment -variable to designate the directory for scratch files. - -Changes std.h so that the VMS C compiler uses function prototypes and -'const'. - -Changes the VMS cc makefile so it doesn't use ansi2knr. - -</pre><h3><a name="V2.5_Fonts"></a>Fonts</h3><pre> -Fixes bugs: - - findfont left an extra entry on the stack if it couldn't -find the default font. - -Renames bchi, ncri, and puti as bchri, ncrri, and putri, to conform -with the naming scheme for other fonts. - -Adds $(CCFLAGS) to the command line used for compiling fonts. - -Converts the .pfa fonts (CharterBT, IBM Courier, and Utopia) to .gsf, -by removing eexec encryption and also removing some mysterious -unmapped characters from Courier. This makes these fonts work with -DISKFONTS. - -Changes the implementation of compiled fonts so they are read-only -and sharable (no external references). (They are, however, not -position-independent.) - -Provides a way to use compiled fonts on platforms that limit the -number of characters in an identifier. - -Adds public-domain Cyrillic and Cyrillic-Italic fonts. - -Adds a 'userdict begin' to .loadfont, because Type 3 fonts produced -by Fontographer expect a writable dictionary on the top of the stack. - -Changes definefont for Type 1 fonts to insert UnderlinePosition and -UnderlineThickness entries in FontInfo if they are absent, because -many word processors incorrectly assume these entries are present. - -</pre><h3><a name="V2.5_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The documentation in use.doc said that the densities for -9-pin Epson printers were 60x60 to 240x60, rather than 60x72 to -240x72. - - gdevprn.c smashed one byte beyond the end of the string -given as the OutputFile device property. - - The X11 driver used XVisualIDFromVisual, which is not -defined in X11R3. - - The SunView driver modified the input data, which was -declared as const. - - The LaserJet IIP and III drivers shifted the page 185 -pixels to the left and 0.25" down, because the initialization string -was incorrect. - - The PCX driver wrote 16-bit values using the byte ordering -of the platform, rather than always LSB first. - - For vertical spacing, the LaserJet and DeskJet drivers used -a command that spaces N/300", rather than N scan lines, but gave it a -parameter in scan lines. - - The VESA driver didn't allocate a full 256-byte buffer for -reading the mode information from the BIOS, causing the stack to get -smashed by newer VESA implementations. - - The VESA driver didn't use the scan line length returned by -the BIOS, causing garbage output for some cards and some resolutions. - - The generic printer driver didn't free the bitmap when -closing the device, if it fit entirely in memory. - - The PaintJet driver allocated its data areas on the stack -instead of with gs_malloc. - - The generic printer driver didn't attempt to increase the -buffer size if it was too small. - - The band list driver didn't split large bitmaps properly, -leading to garbled characters at high resolutions. - - The GIF and PCX drivers used a color map that often turned -gray colors into non-grays. - -Changes the default put_props procedure so that if the device is -open, setting HWSize and/or HWResolution closes the device and -reopens it. - -Adds a driver for Microsoft Windows 3.n. - -Updates the 'cdj' and 'dj500c' DeskJet 500C drivers with new versions. -(This are user-contributed drivers.) - -Changes gdev_prn_put_props so OutputFile can be changed dynamically. - -Updates the DEC LN03 driver to also handle the LA50 and LA75. (This -is a user-contributed driver with a FSF copyright.) - -Changes the LaserJet/DeskJet driver so that -DA4 in the makefile -makes A4 paper the default. The driver now also sends an appropriate -page size selection command to the printer if the printer supports it. - -Changes all the Aladdin-supported drivers to return appropriate error -codes rather than -1. - -Adds a driver for the S3 86C911, a PC graphics accelerator used in -the popular Diamond Stealth board. This is the first driver that -uploads character bitmaps to a device; others will probably follow. - -Adds user-supplied code to the Epson driver so it will do triple -passes on 9-pin printers for higher resolution. - -Adds user-supplied code for the PaintJet XL to the PaintJet driver. - -</pre><h3><a name="V2.5_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - zdps1.c didn't include alloc.h. - - On 32-bit systems, if maxlength of a dictionary was less -than the actual allocated space, length could become larger than -maxlength. - - flushfile didn't actually flush data when reading. - - The ASCII85Decode filter signalled EOF prematurely. - - The scanner interpreted .3D.glorp as the number 0.3, rather -than as a name. - - Closing a file freed the stream structure, creating -dangling references if there were other file objects pointing to the -same stream. - - eexec called handleerror if an error occurred, instead of -letting the error propagate to an enclosing stopped. - - gs.h made perror illegal, instead of defining it in terms -of strerror. - - One-character names weren't being allocated at -initialization, so they could be left dangling after a restore. - - Internal gsaves (i.e., the ones in show and setcachedevice) -didn't also save istate, so setfont inside a BuildChar procedure -might cause the font outside to get changed. - - The allocator incorrectly freed objects in the current -chunk that were older than the current save. - - mark was just an object, rather than an operator, so 'bind' -didn't bind it. (This is theoretically a problem for null, true, and -false also, but even more unlikely to be a problem in practice.) - - packed_get didn't cast packed integers to int, so negative -integer elements of packed arrays came out wrong. - - quit just did a gs_exit, instead of returning to the driver -in an orderly way. - - Because check_type_access checked for errors in the wrong -order, sometimes type errors were reported as access errors. - - eq didn't check for stack underflow. - - Some of the stream_procs structures weren't properly -declared const, leading to link errors on VMS. - -Implements currentcolor, currentcolorspace, setcolor, and -setcolorspace (for DeviceGray, DeviceRGB, and DeviceCMYK only). - -Implements the dictionary form of image and imagemask. All the pairs -in the Decode array must be the same; Interpolate is ignored. The -only supported color spaces are DeviceGray, DeviceRGB, and -DeviceCMYK. - -Implements files as allowable sources for the image operators. - -Removes the index field from the name structure, moving it to the -'size' field of name refs. - -Changes the unread/sungetc operation to require that the character be -the same as the last one read from the file. - -Adds fflush calls to some debugging printout routines, because Unix -sometimes buffers terminal output. - -Implements the CCITTFaxEncode and CCITTFaxDecode filters. Implements -the general case of the SubFileDecode filter. - -Changes definefont to treat a UniqueID of 0 as equivalent to no -UniqueID, because Fontographer output apparently often violates the -specification in this way. - -Changes the default printer screen from 32.5 to 46 cells/inch. (The -old value was appropriate for a hand-rotated cell with two spots in -it.) - -Changes the utility routines to allow an integral real wherever an -integer parameter is expected in a dictionary, because Fontographer -produces fonts that violate the Adobe specification in this way. - -Adds a `dosio' feature that provides direct access to memory and to -I/O ports under MS-DOS. (This feature is not included in the -standard executables, of course.) - -Changes the default character cache limit to a 1/4" x 1/4" character -at the default resolution, rather than basing it on the preallocated -cache size. - -Removes support for t_color objects, which haven't actually been used -for several releases. - -Implements setcmykcolor and currentcmykcolor as operators, so they -will interact properly with setcolorspace and currentcolorspace. - -Changes the name of the file.h header file to files.h, to work around -a bug in the VMS header library. - -Adds command line switches @file (to treat file as more command line, -to get around the DOS 128-character command line limit) and -ffile -(so one can specify file names that begin with - or @). - -Changes the PFBDecode filter so it takes an additional boolean that -says whether or not to convert binary packets to hex. (Conversion to -hex and back to binary accounted for a substantial amount of the time -required to load .PFB fonts.) - -Splits off `copydevice' as a separate operator again. - -</pre><h3><a name="V2.5_Library"></a>Library</h3><pre> -Fixes bugs: - - In the VMS environment, string_.h used its own prototypes -for the str... and mem... functions instead of <string.h> - - gx_alloc_char_bits declared cdsize as long, but didn't -shorten it when passing it to shorten_cached_char. - - Stroking didn't suppress fattening of the lines. - - kshow didn't update the cached CTM information in the show -enumerator when returning from the callout, so further characters -could get drawn in the wrong place. - - When a memory device returned its initial matrix, it -smashed the padding fields, which contained the interpreter's type -information. - - setcachedevice didn't set the initial matrix in the cache -memory device. - - image_set_rgb (in the image operators) didn't do a -gx_color_from_rgb, so in principle one could sometimes get incorrect -colors in an image. - - The decision about whether or not to cache a character -bitmap incorrectly compared the character size against cmax rather -than cdata_size. - - show didn't reset the in_cachedevice flag in the graphics -state, so characters rendered by a recursive show were never cached. - - clip and eoclip didn't release the intermediate flattened -clip path, causing memory to be lost. - - The tile_diff routine didn't handle the case of two -identical tiles properly; this produced garbage in the band list -file. - - stringwidth didn't round the character origin to an -integral pixel; this interacted badly with hinting, causing -improperly hinted characters to wind up in the cache. - - Bitmaps (including characters) were displaced, as well as -being clipped, if they intersected the top of a clipping region. - - In gxclist and gdevmem1, the raster computation (although -not the result) could overflow an int on 16-bit machines. - -Implements decoding (sample mapping) for image and imagemask. - -Implements hinting for Type 1 fonts, based on (but not copying) the -algorithms from the X11R5 tape. - -Changes curve rasterizing to use sampling, rather than recursive -subdivision, for characters. This produces noticeably better output. -Speed penalty for non-cached characters is less than 10% at display -resolutions, up to 50% for 300 dpi printers. - -Implements gs_setcmykcolor and gs_currentcmykcolor. These are -semi-fake, since they simply convert the color to and from RGB, but -the former does set the current color space properly. - -Changes clipping regions so they use the any-part-of-pixel rule -rather than the center-of-pixel rule. This helps avoid dropouts when -using very small regions. - -Implements stroke adjustment. - -</pre> - -<hr> - -<h2><a name="Version2.4.2"></a>Version 2.4.2 (5/8/92)</h2> - -<p> -This is another quick release. It finally fixes rotated halftone -screens, and cleans up a few minor problems from 2.4.1. - -<p> -This release is being distributed only to beta testers and commercial -licensees, since I don't want to be distracted from working on 2.5. - -<h3><a name="V2.4.2_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - UTRACE still appeared in the VMS makefiles. - - The support files (*.bat, *.doc, *.gsf, *.ps, Fontmap, -COPYING, README) weren't included in the MS-DOS tar file. - - The Unix install script didn't install landscap.ps. - -Replaces the type1imagepath operator with PostScript code (impath.ps, -type1ops.ps) based on the new .imagepath operator. - -Renames LICENSE as COPYING. - -</pre><h3><a name="V2.4.2_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - pcharstr.ps had an occurrence of Subrs rather than /Subrs, -causing it to not print the Subrs, or to get an error if there were -none. - - font2c.ps didn't get the const declarations for string -dictionaries quite right. - - The missing newline at the end of gsbj.bat confused GNU -diff. - - ansi2knr would go into an infinite loop if a statement -exceeded its internal buffer size. - - Compiled fonts would get processed by ansi2knr, which -messed them up. - -</pre><h3><a name="V2.4.2_Platforms"></a>Platforms</h3><pre> -Fixes bugs: - - Ghostscript didn't supply equivalents for rename and -gettimeofday, which some System V platforms lack. - - The missing newline at the end of gp_dosfb.c confused GNU -diff. - -Changes the Borland makefiles so that stack checking is only enabled -if DEBUG or TDEBUG is set. - -</pre><h3><a name="V2.4.2_Fonts"></a>Fonts</h3> - -<pre> -Changes the names of the Utopia fonts from utrg/utb/utbi/uti to -putr/putb/putbi/puti, for consistency with the rest of the font names. -Changes cour/courb/courbi/couri to ncrr/ncrb/ncrbi/ncri likewise. - -Replaces the Charter fonts with the CharterBT fonts donated by -Bitstream to the X11R5 distribution. - -Adds font aliasing capability to Fontmap. Replaces -Courier-[Bold]Oblique and ZapfChancery-MediumItalic by aliases. - -Changes the FontBBox of the Hershey fonts to be an executable, rather -than a literal, array. - -</pre><h3><a name="V2.4.2_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The GIF driver omitted a `private' on the definition of -gif_print_page. - - The GIF driver wrote 16-bit values using the byte ordering -of the platform, rather than always LSB first. - - George Cameron's DeskJet 500C driver had an incorrect -control sequence for skipping blank lines. - -Adds 'const' in many places, including the tile and bitmap arguments -of the tile_rectangle, copy_mono, and copy_color driver routines. -THIS IS A DRIVER INTERFACE CHANGE. (Printer drivers are not -affected, since they don't implement these routines.) - -Adds a driver for the Trident TVGA. - -</pre><h3><a name="V2.4.2_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - alloc_free sometimes incorrectly chose to put an unaligned -block in an old segment on a freelist. - - The default undercolor removal function returned its -argument rather than returning 0. - -Adds NullEncode and SubFileDecode to the standard filters, since -bdftops uses the latter. - -Adds RunLengthEncode and RunLengthDecode to the optional filters. - -Removes the type1imagepath operator. (It is still available as -PostScript code, impath.ps.) Replaces it with a simpler outline -tracing operator .imagepath. - -Adds 'const' in many places. - -Makes fileposition (but not setfileposition) legal for NullEncode -filters. - -Changes the default transfer function for high-resolution devices -from the identity function to the square root function. - -Moves array_get from zgeneric.c to iutil.c. - -Changes uses of fopen to add a "b" to the access mode, rather than -relying on the _fmode global variable on MS-DOS platforms. - -Allows use of the -Z switch even when gsmain.c wasn't compiled with --DDEBUG, since other modules might have been. - -Reorganizes gs.c and gsmain.c so that the latter can be used in -server environments. - -Replaces all uses of stdin/out/err with gs_stdin/out/err. - -Makes the number of permanent entries on the dictionary stack a -parameter, to allow inserting globaldict in the future. - -Changes BlueShift in the Type 1 font Private dictionary to allow real -numbers. (This differs from the Adobe specification, but at least -one commercial font has a real number for BlueShift.) - -</pre><h3><a name="V2.4.2_Library"></a>Library</h3><pre> -Fixes bugs: - - The doubling check in init_ht (gxht.c) still sometimes -thought there was enough room to double the tile when there actually -wasn't. - - Rotated halftone screens didn't work. - - gxarith.h used #ifdef vax, rather than #if -!arch_floats_are_IEEE, to test whether IEEE floats were being used. - - pathforall didn't report a trailing moveto. - -Replaces gs_type1imagepath with gs_imagepath. - -Allows sOUTPUTFILE=-, meaning output to stdout. - -Adds 'const' in many places. - -Replaces all uses of stdin/out/err with gs_stdin/out/err. - -</pre> - -<h2><a name="Version2.4.1"></a>Version 2.4.1 (4/21/92)</h2> - -<p>This is a quick release to fix minor problems discovered in 2.4, and -to add a few improvements that didn't quite make it into 2.4. It -also adds GIF and PCX file support. - -<h3><a name="V2.4.1_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - Some makefile dependencies, and the ccgs script, caused trouble -for parallel versions of `make'. - - Compiling genarch with -O with gcc on the RS/6000 produced a -buggy executable. - -Fixes some minor problems in make.doc. - -Adds DEVICE_DEVS2..5 to handle long device lists. - -Removes the need to set GS_RUN_EXE when using the Watcom compiler on -MS-DOS systems. - -Gets rid of gs_ccfnt.ps, merging its function into gs_fonts.ps. - -Gets rid of gconfig.ps; this information is now compiled in gconfig.c. - -</pre><h3><a name="V2.4.1_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - The palette for pstoppm in 8-bit mode didn't contain all 8 -primary colors. - - font2c used just values_ to mean &values_[0]; some compilers -couldn't handle this. - -Makes font2c insert `const' in many appropriate places. - -</pre><h3><a name="V2.4.1_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The SunView driver had not been updated properly for 2.4 and was -pretty thoroughly broken. - - None of the printer drivers worked properly with the Watcom -compiler, because stdprn was doing \n -> \r\n substitution. - - If the generic printer driver couldn't allocate the requested -size command list buffer, it gave up rather than trying to allocate a -smaller buffer. - - The SuperVGA drivers (except for the VESA driver) didn't -work with the Watcom compiler, because a couple of places in the -drivers weren't truncating the offset of "segmented" pointers -properly. - - Some of the H-P used <esc>*b#Y rather than <esc>*p+#Y for -vertical positioning; this apparently is wrong, at least for the -LJIIp. - -Removes the dependence of the X Windows driver on Xt, Xext, and Xmu. As a -result, Ghostscript will not install a standard colormap itself, but it -will use one if one is already installed. - -Adds a set of drivers for Portable Bitmap, Graymap, and Pixmap file -formats. - -Adds drivers for monochrome, EGA/VGA-style, and SuperVGA-style PCX -file formats. - -Adds drivers for monochrome and 256-color GIF file formats. - -</pre><h3><a name="V2.4.1_Fonts"></a>Fonts</h3><pre> -Adds ZapfChancery-MediumItalic as a copy of ZapfChancery-Oblique. - -</pre><h3><a name="V2.4.1_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - A value with l_new set could 'escape' to save level 0 on a -stack; if stored, it prevented the slot from being saved and restored -properly. - - 16#7fffffff + 1 gave the floating point equivalent of -2^31, not -2^31. - - The PFBDecode filter computed the packet length incorrectly if -the 0x8000-bit of the length was set. - - 5-byte numbers in Type 1 CharStrings complained of a rangecheck -if they exceeded 16 bits, rather than if they exceeded the integer part of -a fixed. - - (, ), and \ appearing in file name arguments in the command -line did not work properly. - -Adds 'const' in many places. - -Changes the random number generator to be the same as the one used in -Level 2 PostScript (as reported by Ed Taft on comp.lang.postscript). - -Exits with code 1 rather than code 0 on an unrecoverable error detected at -the PostScript level. - -Makes dictionaries expand automatically when they fill up. - -Adds gp_exit to complement gp_init. - -Changes dictionaries to always allocate a power of 2 entries on -32-bit machines. Changes the name table to allocate indices -scattered, so dictionary lookup doesn't have to do a multiply to -scramble the index. - -Changes the handling of currentfile to do "shallow binding" so stack -searching is almost never required. - -</pre><h3><a name="V2.4.1_Library"></a>Library</h3><pre> -Fixes bugs: - - arc and arcn got a numeric exception if the radius was zero. - - The undocumented 15 opcode in Type 1 fonts wasn't ignored. - - PaintType 3 wasn't allowed. (It isn't clear what it should -mean; we treat it as equivalent to 0.) - - The VAX/VMS C compiler was generating incorrect code for the -chi_bits and cmask macros in gdevmem, producing incorrect output. - - If the result of the slow algorithm for intersecting clipping -paths was a rectangle, the wrong thing happened (cbox didn't get set). - - gx_path_is_rectangle didn't recognize open rectangles. - - clist_change_tile didn't check properly whether the tile -size had changed, so changing the screen could produce invalid band -files. - - The image operators did the wrong thing in the 1-for-1 -case, interleaving N bytes of data with 7*N bytes of garbage. - - stroke sometimes handled bevel and miter joins wrong in -reflected coordinate systems. - - init_ht checked incorrectly whether there was enough room -to Y-replicate tiles, so sometimes it did it when it shouldn't have. - - stroke sometimes thought lines were thin when they weren't. - -Adds 'const' in many places. - -Adds support for 2- and 4-bit-per-pixel memory devices. - -</pre> - -<h2><a name="Version2.4"></a>Version 2.4 (3/25/92)</h2> - -<p>This is a major release that adds SuperVGA support, support for -Metrics, -settable device properties, and incremental font loading. It also -includes important performance improvements, based on rewrites of some key -algorithms, and quite a few new Level 2 / Display PostScript facilities. - -<h3><a name="V2.4_Procedures"></a>Procedures</h3><pre> -Fixes bugs: - - The rule for compiling gconfig.c didn't include the -I switches. - - .bat files were being distributed with a \n line terminator -rather than \r\n. - - A CLOSE MODULE_LIST was needed after END_COMPILE: in the VMS -command files. - - Unix systems couldn't handle multiple drivers with overlapping -sets of files. - - -s<name> defined <name> as a null, rather than as an empty string. - -Adds gconfig.ps to the list of needed configuration files. - -Changes the way that the makefile handles nested .h files, so that it -doesn't have to `touch' them. - -Adds the loadallfonts procedure to gs_fonts.ps. - -Changes the standard DOS configuration to include VGA, EGA, VESA, Epson, -BubbleJet, and H-P printer drivers. - -Renames ghost.mak as gs.mak, and gdevs.mak as devs.mak. - -Adds a USE_ASM flag so that one can build a DOS version of Ghostscript -without having an assembler. - -Splits off common code from the two MS-DOS makefiles into tccommon.mak. - -Replaces the COPYING and LICENSE files with a new LICENSE file containing -version 2 of the GNU General Public License. - -Removes DEVICES and DEVICE_OBJS from the makefiles, since they are no -longer needed. - -Adds a GS_DEVICE environment variable to supply a default device name if -desired. - -Adds ansihead.mak and unix-ansi.mak, to parallel [g]cc-head.mak and -unix-[g]cc.mak, for other ANSI C compilers. - -Changes the way that optional features are defined in the makefiles, so -that they actually work. - -Adds support for the Watcom C/386 compiler. - -Allows # in the command line as equivalent to =, to compensate for -brain-damaged MS-DOS shell. - -Adds -sOUTPUTFILE= to set the output file or pipe. - -Adds -dWRITESYSTEMDICT to leave systemdict writable. - -</pre><h3><a name="V2.4_Utilities"></a>Utilities</h3><pre> -Fixes bugs: - - pcharstr.ps insisted on having Subrs be present in the font. - - pcharstr.ps decoded negative numbers between -108 and -1131 -incorrectly. - - pfbtogs.ps didn't handle packets longer than 64K correctly. - -Changes the bdftops utility so that it makes entries for UnderlinePosition -and UnderlineThickness in FontInfo, and so that it always records a -FullName (the FontName if no other is provided). - -Changes the name of the pfbtops utility to pfbtogs, because groff already -includes a program called pfbtops. - -Adds the gslp utility for doing "line printing" of text files, similar to -enscript + lpr. - -Adds a new variable DITHERPPI that enables a different dither pattern, -claimed to be better for printers. - -Adds the font2c utility for compiling Type 1 fonts into C, so they can be -linked into an executable rather than loaded dynamically. - -</pre><h3><a name="V2.4_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - gdev_prn_copy_scan_lines was erroneously masking the last byte -of data even on color printers, as was paintjet_print_page. - - The TruFax driver had a couple of compilation errors, since it -hadn't been compiled in a while. - - The BGI driver sometimes didn't consult BGIPATH when looking for -.BGI files. - - initclip did the wrong thing with memory devices. - - The BGI driver didn't look in BGIDIR for .BGI files. - - The Epson driver didn't set the right margin properly with -ESC+Q. - - The BJ-10e driver was badly broken. - - gdev_prn_open/close_printer didn't reset the command list file, -so it was taking quadratic time to print multi-page documents. - -Adds color to the SunView driver. - -Adds selectable resolution (75, 100, 150, or 300 DPI) to the -DeskJet/LaserJet driver. - -Changes gssetdev so that drivers can specify special libraries to be -loaded, as well as object files. - -Adds a driver for VESA-compliant SuperVGA displays. This driver handles -all resolutions from 640 x 400 up to 1280 x 1024, in 256-color mode. The -default is VGA resolution (640 x 480). - -Adds a driver for the ATI Wonder SuperVGA card, and for SuperVGA cards -using the Tseng Labs ET3000 or ET4000 chip such as the STB VGA EM-16 and -the Orchid ProDesigner II (256-color modes only). - -Adds a driver for Trident and Tseng Labs SuperVGA cards in 800 x 600, -16-color modes (for cards with only 256K of memory). - -Adds user-contributed drivers for the Ricoh 4081, DEC LN03, Canon LBP-8II, -and H-P DeskJet 500C printers. - -Adds Tim Theisen's Ghostview changes to the X11 driver. - -MAKES NON-BACKWARD-COMPATIBLE CHANGES TO THE DRIVER PROCEDURE INTERFACE as -follows: - - - Changes map_rgb_color and map_color_rgb to always work in a - 16-bit color value space, rather than a space defined by the - maximum number of distinct colors provided by the device. - - - Adds an argument to the output_page procedure to indicate - whether the procedure is being called for copypage or - showpage, and a num_copies argument. - - - Adds a gx_bitmap_id to the copy_ and tile_ procedures, so that - drivers can cache bitmaps in the server or device if they want - to. - - - Removes fill_trapezoid and tile_trapezoid. - - - Adds a new get_bits procedure for reading the bits back from the - driver buffer (when possible), replacing copy_scan_lines. - This procedure takes a new argument describing padding and - byte swapping, and returns a different value from - copy_scan_lines. - - - Adds get_props and put_props procedures for accessing arbitrary - additional properties of devices. The interface is quite - complex, but provides a great deal of flexibility. - -See drivers.doc for details. - -Changes gdev_mem_bytes_per_scan_line to gdev_prn_bytes_per_scan_line. - -Adds a user-contributed driver for DigiBoard, Inc.'s fax software. - -</pre><h3><a name="V2.4_Fonts"></a>Fonts</h3> - -<pre> -Changes Type1BuildChar so it uses the information from the Metrics -dictionary in the font, if Metrics is present. - -Changes findfont (.loadfont) so it recognizes .PFB fonts and can load them -directly. Also changes .loadfont to disable packing temporarily, because -some fonts rely on procedures being writable (!). - -</pre><h3><a name="V2.4_Interpreter"></a>Interpreter</h3><pre> -Fixes bugs: - - The hypot function is not available on some Unix systems. - - Ghostscript didn't flush and close files when exiting. - - In statusdict, the /margins procedure used .leftmargin, but -/setmargins used .lmargin. - - An out-of-range putinterval would simply do nothing, rather than -reporting an error. - - If an attempt to allocate a block larger than the allocator's -chunk size (20K) failed, the allocator would erroneously think it had -succeeded. - - The bind operator made the top-level procedure read-only, as -well as interior procedures. - - gs.c copied 1 extra character for the value of strings defined -on the command line with -s...=, which could smash the first byte of the -next object in memory. - - copying a dictionary erroneously required the maxlength of the -destination to be greater than or equal to the maxlength of the source, -rather than the length of the source. - - undef didn't correctly decide when to mark a deleted entry as -deleted vs. free; as a result, some keys couldn't be looked up properly -after an undef. - - type1encrypt and type1decrypt didn't set the size of the result -properly. - - cvi and cvr didn't allow leading or trailing whitespace in -strings. - - cvs didn't cause an error if the destination string was too -short. - - Many operators didn't check correctly for stack underflow (off -by 1). - - `for' used reals, rather than integers, if the limit was a real, -even if the initial value and increment were integers. - - `restore' didn't properly invalidate copies of the save object -being restored from; `save dup restore restore' would crash. - - `restore' sometimes didn't undo stores into matrices that were -stored into by operators. (The identity matrix always had l_new set.) - - readline gave a rangecheck if the input line exactly filled the -string. - - `--' as the last switch on the command line caused a crash -rather than an error message. - - On MS-DOS systems, filenameforall didn't handle patterns with a -drive or directory specifier properly. - - stroke sometimes called gz_draw_line_fixed even if the line went -outside the clipping box by 1 pixel. - -Changes the loop that binds procedure "operators" to entirely disable the -handling of the typecheck error, rather than to use stopped. This cuts -initialization time significantly, and also eliminates about 35K of wasted -space (for saving the stacks). - -Changes the version "operator" so it returns 47.0. Adds "revision" to -define the Ghostscript version # x 100. - -Adds gscurrentresolution and gssetresolution procedures for getting and -setting the device resolution. - -Adds -r<res> and -r<xres>x<yres> as command line options for setting -device resolution. - -Adds a facility for incrementally loading the individual CharStrings of a -Ghostscript font from the disk. This can save a lot of memory, at the -expense of slower rendering. (It is intended primarily for MS-DOS -systems.) - -Changes findlibfile to return the name of the file that was actually -opened, as well as the file itself, when the operation succeeds. - -Changes the name of the main entry to the interpreter from interpret to -gs_interpret, because of a conflict with a Data General library procedure. - -Adds the .setmetrics operator to set the metrics for the current -character for Type 1 fonts. - -Adds more LaserWriter-specific entries to statusdict. - -Gives names to all the internal `operators', so they will print out -reasonably when an error occurs. - -Extends the status operator to accept a string and return file -information, as defined for Level 2 PostScript. - -Adds the filter operator and some specific filters: ASCII85Encode, -ASCII85Decode, ASCIIHexEncode, ASCIIHexDecode, eexecDecode, NullEncode, -PFBDecode, and the null case of SubFileDecode. - -Extends the scanner to recognize the Level 2 << and >> tokens. - -Adds a facility for extracting the text strings from a PostScript file and -writing them out in a simple format (selected by -dASCIIOUT, implemented -by gs_2asc.ps). - -Implements all of the remaining Display PostScript facilities that are -also in Level 2 (i.e., everything in section A.1.3 of the PostScript -Language Reference Manual, Second Edition, that is not also in section -A.1.2). The virtual memory operations are all stubs; the new halftone -options are not fully implemented. - -Changes makeimagedevice to use a string of gray or RGB values, rather than -an array of color objects, to specify the palette. Removes -currentgscolor and setgscolor from the interpreter, but leaves t_color -objects in, since they may be useful later. - -Adds getdeviceprops and putdeviceprops for manipulating device properties. -Currently defined properties for all devices: InitialMatrix, HWResolution, -HWSize, Name. Currently defined properties for printers: BufferSpace, -MaxBitmap, OutputFile. OutputFile allows |command for piping on Unix -systems. - -Removes deviceparams and makedevice. Adds devicedefaultmatrix. - -Implements reversepath. - -Makes copy work on devices. - -MS-DOS specific -- - - - - - - - - -Fixes bugs: - - iutilasm.asm wouldn't assemble with newer versions of MASM if -CPU_TYPE was set to 286 or above. - - CPU_TYPE=386 didn't properly substitute the faster -multiply/divide routines under Turbo C++ or Borland C++, only under the -original Turbo C. - -</pre><h3><a name="V2.4_Library"></a>Library</h3><pre> -Fixes bugs: - - A curve whose first and last points were the same wouldn't get -drawn at all. - - A bug in the Turbo C++ compiler generated bad code when shifting -a long right by 1 bit. - - If stroking a dashed line ever encountered a segment that was -completely blank, Ghostscript would indirect through a null pointer. - - arc and arcn gave an error if the radius was negative. - - stroke always used the general algorithm, even if the line was -guaranteed to be thin. - - arc and arcn erroneously reduced the angles mod 360. - - Very large or negative 32-bit numbers in Type 1 fonts didn't -work properly on MS-DOS systems (the ff0000 bits got set to zero). - - Color printer devices rendering entirely in memory only -allocated a monochrome-sized bitmap. - - clip and eoclip didn't intersect the paths properly in the -general case. - - charpath erroneously rounded the current point to an integral -value, causing characters to be spaced improperly. - - The definition of max_color_param got some compilers confused. - - charpath always used quadratic time and space, and dropped all -but the last character when used with a Type 3 font. - - Stroking a path with a 180 degree angle would incorrectly miter -instead of beveling. - - Type 1 fonts used the current flatness for curves, which could -produce bad (and inconsistent) results. - - Stroking a degenerate line segment produced incorrect results. - -Changes the character cache to use the UniqueID as the key, when -available, instead of the font pointer. This dramatically improves -performance when fonts are getting removed and reloaded because of page -isolation with save/restore. - -Removes some unnecessary casts to (float) from gsmatrix.c and gscoord.c. - -Changes the Type 1 interpreter so that it rounds line and curve endpoints -to the center of the nearest half-pixel, and omits null line segments. -This both speeds up rendering at small sizes and improves output quality. - -Changes gs_deviceparams to return resolution as well as extent; changes -gs_makedevice to accept resolution as well as extent. - -Replaces the algorithm for approximating circular arcs with curves with a -more accurate one. - -Changes gs_point and gs_rect to use doubles rather than floats. - -Adds gs_setmetrics, for overriding Type 1 font metrics for the current -character. - -Changes clipping to use lists of rectangles rather than path intersection. - This makes a big difference when clipping bitmaps (including characters). - -Changes the character cache to discard entries incrementally, rather than -clearing the entire cache when it fills up. - -Changes the implementation of transfer functions to use a cached map, -built when the transfer function is set. This makes transfer functions -work properly in all situations, including images. - -Defines a .quit operator that takes an exit code, and redefines quit in -terms of it. - -Adds support for 16-bit-per-pixel devices in gdevmem. - -Adds gs_copydevice and gs_deviceinitialmatrix; removes gs_deviceparams and -gs_makedevice. - -Changes setscreen to ensure that the cell is always at least 4x4 pixels in -size. - -</pre> - -<h2><a name="Version2.3"></a>Version 2.3 (8/28/91)</h2> - -<p>This is a minor release to fix two bugs and add the PaintJet driver, -which -didn't make it into 2.2. - -<h3><a name="V2.3_Utilities"></a>Utilities</h3><pre> -Changes the pstoppm utility so it counts pages correctly even in the -presence of arbitrary saves and restores. - -</pre><h3><a name="V2.3_Drivers"></a>Drivers</h3><pre> -Adds a new, "supported" PaintJet driver. - -Changes the Epson driver to use ESC+D rather than ESC+\ for horizontal -positioning, since many printers don't support the latter. - -Adds horizontal double-density (two-pass) printing to the Epson driver, so -it can do 240 x 60 and 360 x 180 densities. (Vertical double density is -not supported yet.) - -</pre> - -<hr> - -<h2><a name="Version2.2"></a>Version 2.2 (6/1/91)</h2> - -<p> -The purpose of this release is to add save/restore, and a few -miscellaneous Level 2 P*stScr*pt features such as undef. It also includes -major improvements in graphics quality and in handling of high-resolution -printers. - -<h3><a name="V2.2_Procedures"></a>Procedures</h3><pre> -Changes the version numbering to M.mpp rather than M.m.p, so that -`version' can be a real number for those programs that insist on it. - -Renames ghost.ps as gs_init.ps, gfonts.ps as gs_fonts.ps, and statusd.ps -as gs_statd.ps. The initialization files now all are named gs_*.ps. - -Renames gdevs.{c,h,tl} as gconfig.{c,h,tl}. - -Changes the relevant makefiles and command files so that a single build -can contain several drivers that share code, e.g., the Epson driver and -the DeskJet driver. - -Changes gs_init.ps so it relies on an external gconfig.ps file rather than -making a specific test for the presence of Level 2 features. - -Adds an entry for uglyr.gsf to the makefile. - -Removes the distinction between CCA and CCNA, since most of the files now -contain constructs that require non-ANSI compilation on MS-DOS platforms. - -Adds a `man' page for the ansi2knr utility. - -Changes the documentation (use.doc) to show how to use -sDEVICE=<device>, -or the selectdevice procedure, to select devices by name. - -Adds DEVICE_DEVS to the makefiles (analogous to DEVICES and DEVICE_OBJS). -This finally makes the make procedure fully automatic. - -Adds the name of the initialization file (gs_init.ps) as a -platform-specific makefile parameter, GS_INIT. - -Removes the test program gt.{c,tr} from the fileset, since it is not -useful to users. - -Moves the Symbol encoding vector to a separate file (symbol_e.ps), from -which it is loaded when first used. - -Changes the error handler so it can handle errors that occur while reading -the initialization files. - -Extends ansi2knr so it can handle `void' and `...' in parameter lists. - -Adds quit.ps to the set of installed files. - -MS-DOS-specific changes -- - - - - - - - - - - - - -Adds the VGA and BGI drivers to the standard MS-DOS configuration, and -makes VGA the default. - -Adds a `+' and a newline at the end of gs.tr, to avoid problems with file -transfer programs or editors that add a newline at the end of files. - -Changes the name of msdos.mak to turboc.mak, and creates a new tbcplus.mak -makefile for use with Turbo C++ and Borland C++. - -Changes the extension of the loader response files from .tl to .tr. - -Changes the default search path from c:/ghost and c:/ghost/fonts to c:/gs -and c:/gs/fonts. - -Changes the directory separator from `|' back to ';', since it appears -that DOS can handle a ; in a command line if it is prefixed with \. - -Unix-specific changes -- - - - - - - - - - - - -Changes the uses of install in unixtail.mak so they only install a single -file at a time, which is all that the standard Unix install allows. - -Removes the duplicate files (README/readme, LICENSE/license, -COPYING/copying, Fontmap/fontmap). - -Changes the ld flags from LDPLAT to LDFLAGS. - -Adds XCFLAGS and XLDFLAGS. These are concatenated with CFLAGS and LDFLAGS -respectively. The intention is that they be set from the `make' command -line if desired. - -VMS-specific changes -- - - - - - - - - - - -Repairs the omission of ZPACKED from the VMS build lists. - -</pre> - -<h3><a name="V2.2_Drivers"></a>Drivers</h3><pre> -Fixes bugs: - - The SunView driver produced semi-garbage on little-endian -platforms (Sun-386i) because it didn't swap the bit order. - - The X driver would dump core if it couldn't open the display and -the DISPLAY environment variable wasn't set. - - The X driver relied on white = 0, black = ones in a couple of -places; - - The X driver would return an error, instead of clipping, if -asked to display outside the window. - - The X driver would create inappropriately sized windows, because -it believed the server's report of the screen resolution. - -Adds Fran Taylor's Private Eye driver to gdevs.mak and the fileset (not -supported by Aladdin Enterprises). - -Adds Neil Ostroff's TruFax driver to gdevs.mak and the fileset (not -supported by Aladdin Enterprises). - -Makes the scratch file template for the printer drivers a per-platform -quantity (gp_scratch_file_name_template). Puts the default scratch files -for Unix in /usr/tmp rather than /tmp. - -Changes the SunView driver to prevent the Ghostscript window from being -destroyed (which badly confuses the interpreter). - -Extends the Epson driver to handle a variety of print densities in both X -and Y, to handle 24-pin as well as 8-pin graphics, and to allow optional -specification of default density in the makefile (gdevs.mak). - -Refactors the printer drivers so that a single driver handles both DeskJet -and LaserJet. Adds LaserJet drivers that use the new compression modes on -the LJ IId/IIp and LJ III. - -Changes all the printer drivers to use band lists rather than bitmap -paging as the buffering method. (The individual drivers need only a -one-line change to replace mem_copy_scan_lines with -gdev_prn_copy_scan_lines with a different argument.) - -Adds the halftone phase as additional arguments to tile_rectangle and -tile_trapezoid. - -Adds an entirely new and much simpler PaintJet driver, using the new band -list interface. - -Adds margin information to the device structure. This is currently only -relevant for printer devices. - -Adds BGIPATH and BGIUSER environment variables, allowing additional -control of the BGI driver. - -Changes the x/y_pixels_per_inch member of the device structure from int to -float. - -</pre> - -<h3><a name="V2.2_Fonts"></a>Fonts</h3> - -<pre> -Patches gs_fonts.ps so definefont will add an isFixedPitch entry to -FontInfo if there isn't one there. - -Removes the old "type 7 path" encoding code from gs_fonts.ps. - -Changes bdftops so it puts isFixedWidth and ItalicAngle entries in the -FontInfo dictionary of the fonts it creates, since some P*stScr*pt -programs rely on this. - -Changes bdftops so it synthesizes as many missing characters as possible -out of the ones that are there (in particular: synthesizes accents out of -punctuation marks, and accented characters using seac.) The results -aren't all that good, but they're a lot better than having characters -missing out of the font. - -</pre><h3><a name="V2.2_Utilities"></a>Utilities</h3><pre> -Adds a pfbtops utility for converting .PFB fonts to standard Ghostscript -fonts. - -Fixes bugs: - - ps2image didn't reset things properly between pages for -multi-page documents. - -</pre><h3><a name="V2.2_Interpreter"></a>Interpreter</h3><pre> -Makes Ghostscript recognize `-' alone as meaning that it should read from -standard input as though it were a file. This allows Ghostscript to -accept a pipe as input. - -Fixes bugs: - - seac in type1addpath used the current font's encoding, not -StandardEncoding. - - type1decryptfile (eexec) didn't recognize binary (as opposed to -hex) representation. - - Mentioning a name whose value was a no-access object caused an -invalidaccess error. - - There was a bogus definition of `run' in zfile.c. - - The interpreter didn't handle end-of-file on stdin properly. - - Real numbers with an 'e' or 'E' but no decimal point were not -recognized. - - On MS-DOS systems, inside strings, \ followed by a newline was -not discarded properly. - - On MS-DOS systems, the long unsigned divide routine sometimes -gave incorrect answers. Among other things, this caused alternate-radix -numbers sometimes to crash the interpreter. - - cvrs didn't do the right thing about reals or negative integers. - - .echo.mode was being reset with def instead of store, and was -defined in systemdict rather than userdict. - - setgray and settransfer didn't interact properly. - - 16#80000000 was being interpreted as a signed integer (and -converted to a real) rather than an unsigned one. - - atan returned 0 sometimes when it should have returned 180. - - currentcmykcolor was defined wrong. - -Removes the filename operator, since no standard Ghostscript code used it, -and it caused problems with some P*stScr*pt files. - -Implements new operators: filenameforall, selectfont (as a procedure), -stringmatch, undef. - -Adds new standard procedures: selectdevice. - -For MS-DOS, requires that the operand and execution stacks be located in -the data segment, and uses short pointers to address them. This produces -significantly smaller and faster code. (These changes are not visible to -users or library clients.) - -Changes the assignment of attribute bits, and adds new bits for -save/restore and the garbage collector. Changes many of the macros in -store.h to support save/restore. (These changes are not visible to users -or library clients.) Implements save and restore. - -Moves type names from gs_init.ps to ghost.h and ztype.c. - -Moves error names from gs_init.ps to errors.h and iinit.c. - -Introduces gp.h as a documented interface to the platform-specific files. - -Adds the -- switch, which allows Ghostscript programs to take arguments -from the command line. - -Changes many uses of the name `name' to something else, to avoid upsetting -the Microsoft C compiler. - -Really implements packed arrays -- they took the same amount of space as -ordinary arrays in previous versions. - -Changes exitserver in serverdict so that it just clears the stacks. (This -isn't the correct fix, but it will do as a workaround.) - -Makes many miscellaneous small changes to pacify various compilers. - -Changes gs_fonts.ps so that when "quiet" mode is selected (-q switch), -Ghostscript doesn't print anything when loading fonts or when substituting -for undefined characters. - -Defines the name consisting of just a control-D as a no-op, because some -P*stScr*pt-generating applications put control-Ds in their output. - -Implements halftone phase (sethalftonephase and currenthalftonephase -operators). - -Removes the -E switch, since it is no longer useful. - -Changes the -w and -h switches to a single -g (geometry) switch, with -usage -g<width>x<height>. Makes the -h switch, and a new -? switch, print -usage help. - -Implements correct handling of stack overflow errors (makes an array out -of the contents of the overflowing stack, and resets the stack, before -invoking the error handler). - -Adds t_oparray (`operators' defined as procedures) and the makeoperator -operator. This is so that programs like the Distillery that rely on all -operators being bound by `bind' will work properly. - -Adds a new NOPAUSE flag to suppress the prompt and pause at copypage and -showpage. - -</pre><h3><a name="V2.2_Library"></a>Library</h3><pre> -Fixes bugs: - - gs_type1_interpret didn't store the encryption state or the skip -count before returning to let the client handle a seac or an endchar in -the middle of a seac. - - The definition of the Type 1 operator ce_testadd was based on -wrong information; the operator takes only 2 operands and does something -unknown. - - mem_true24_copy_mono wasn't incrementing the destination pointer -if the color was transparent, leading to garbled characters. - - gx_lookup_fm_pair would sometimes look at one entry beyond the -end of the cached font/matrix pair area. (This probably had no practical -effect.) - - gs_type1_interpret didn't save the current point when returning -to the client for a callothersubr, causing some characters to be rendered -displaced (such as some of the chess pieces in chess.ps). - - gs_setgray, gs_sethsbcolor, gs_setrgbcolor, gs_setflat, and -gs_setlinewidth gave errors for out-of-range operands rather than forcing -them into range. - - Transfer functions were not actually supported. - - The area fill algorithm failed on certain complex paths. - - The current point was sometimes defined when a BuildChar -procedure was called. - - Stroking a degenerate line didn't display anything for round -caps or joins. - - If the ends of a curve had exactly the same X coordinate, the -curve sometimes wouldn't be displayed. - - Very thin lines that went outside the clipping region would -sometimes be displayed as dashed, or not at all. - - The translation in a FontMatrix was ignored. - - Very wide, shallow lines would color extraneous pixels when -using bevel or miter joins. - - Dashed lines didn't join properly at the beginning of a closed -path. - - 0-degree arcs didn't add the appropriate line (possibly -degenerate) to the path. - - gs_type1_interpret didn't reset the callsubr stack when starting -the base character of a seac, which caused confusion if the accent's -endchar fell inside a Subr. - - Non-monochrome memory memory devices weren't checking the -arguments of the drawing procedures properly. - - The initial clipping rectangle for memory devices was being -computed wrong. - - Null devices had a semi-infinite clipping rectangle instead of -an empty one. - - gs_setlinewidth was treating negative arguments as zero, instead -of taking the absolute value. - - imagemask with a dithered color used a solid color rather than -the dithered one. - -Tweaks the area fill and image rendering algorithms to be a little more -liberal with paint when being used to render characters. - -Changes the name of the 8-bit mapped color memory device from -mem_mapped_color_device to mem_mapped8_color_device. - -Changes the memory devices so that on little-endian platforms, they can -store the bytes within a word in either order. (Little-endian order -allows efficient 32-bit updating, big-endian is required when displaying -or writing to a printer or a file.) - -Implements halftone phase. - -Replaces the trapezoid fill algorithm with a much more accurate one -inspired by a contribution from Paul Haeberli. This also changes the -graphics convention back to filling only pixels whose center falls within -the region to be filled. - -Changes the character cache to allocate headers and bits contiguously out -of a single ring buffer. - -Changes gs_imagemask and gs_imagemask_init to take a thickness adjustment -parameter. - -Changes gs_setcachedevice and gs_setcharwidth to take the graphics state -as a parameter. - -Renames gx_device_memory_bitmap_size as gdev_mem_bitmap_size, -mem_copy_scan_lines as gdev_mem_copy_scan_lines, and -mem_bytes_per_scan_line as gdev_mem_bytes_per_scan_line. - -</pre> - -<hr> - -<h2><a name="Version2.1.1"></a>Version 2.1.1 (1/15/91)</h2> - -<p>This is a sub-release distributed to fix a few early bugs in 2.1, -just in -time for the new GNU master tape. - -<h3><a name="V2.1.1_Build_procedures"></a>Build procedures</h3><pre> -Removes all of the (undebugged) Level 2 code from the fileset, as well as -the (unused) file gdevvga.c. - -Changes the tar file so that the files are stored in the directory -gs<version> rather than simply gs, e.g., gs211. - -</pre><h3><a name="V2.1.1_Interpreter"></a>Interpreter</h3><pre> -Changes the scanner so that \ is recognized within strings regardless of -whether the scanner is reading from a string or from a file. This is -compatible with newer P*stScr*pt interpreters, and with the newer -P*stSc*pt language specification, but not with the older specification in -the original PostScript Language Reference Manual. - -</pre><h3><a name="V2.1.1_Drivers"></a>Drivers</h3><pre> -Fixes the max_value macro in gdevmem.c so that compilers won't complain -about a left shift by 32. - -Adds 'byte' to the list of types that gdevx.c must sidestep because header -files use them. - -</pre><h3><a name="V2.1.1_Library"></a>Library</h3><pre> -Changes the computation of penum->unpack in gsimage.c so as not to upset -compilers that don't treat procedures and pointers to procedures as -compatible types for conditional expressions. - -</pre> -<h2><a name="Version2.1"></a>Version 2.1 (12/31/90)</h2> - -<p>This is primarily a bug fix release to clean up problems in 2.0. It -also implements a first cut at the new color operators. - -<h3><a name="V2.1_Build_procedures"></a>Build procedures</h3><pre> -Changes the separator for multiple directories in MS-DOS from ';' to '|', -since there is no way to include a ';' in a command line. - -Adds <dir>/fonts to the default search path, where <dir> is c:/ghost for -MS-DOS systems and `pwd` for Unix systems. - -Adds new documentation describing how to direct output to the printer. - -Changes the PROCTYPE and USE8087 options in MSDOS.MAK to CPU_TYPE and -FPU_TYPE. The latter now indicates the type of FPU to generate code for, -if any. - -</pre> - -<h3><a name="V2.1_Drivers"></a>Drivers</h3> - -<pre> -Adds a driver for the Canon BubbleJet BJ10e. - -Modifies the EGA driver to handle (non-standard) frame buffers larger than -64K. Adds drivers for the VGA and for the EIZO MDB-10 (a 1024 x 768 frame -buffer). - -Changes the X driver so that it clips to the window dimensions, rather -than reporting an error. - -Notes that the H-P LaserJet driver, like the DeskJet driver, works under -Unix as well as MS-DOS. - -Adds support for 120 X DPI mode, and for the LQ-1500, to the Epson driver. - -</pre><h3><a name="V2.1_Fonts"></a>Fonts</h3><pre> -Fixes bugs in bdftops: - - It was using /UniqueId instead of /UniqueID as the key for the -font unique ID. This effectively disabled the font cache. - - The definition for .notdef was bogus -- an invalid CharString. - -Changes ghost.ps and gfonts.ps so that NullFont is the initial font, -rather than Ugly. - -Arranges things so that when attempting a font substitution, if the -default font is not found, NullFont is used instead. - -Extends bdftops so that if certain easily synthesized characters are -missing from a font, it will attempt to synthesize them using available -characters. - -</pre><h3><a name="V2.1_Interpreter"></a>Interpreter</h3><pre> -Extends the -T switch to allow specifying a printf template for the -arguments of the procedure being traced. - -Fixes bugs: - - /0 was interpreted as equivalent to 0 (a number) rather than a -literal name. - - packedarray was defined as being like array, instead of like -array followed by astore. - - Many minor and harmless type mismatches (and a couple of very -minor genuine bugs) were upsetting the Apollo C compiler. - - exp was incorrectly failing in certain cases with a negative -first argument. - - copyscanlines incorrectly required at least 4 elements on the -operand stack, although it correctly only used the top 3. - - readhexstring incorrectly read 1 byte even if the string length -was zero. - - Not every place that expected an array would accept a packed -array. - - Very complex paths (and infrequently other things) could produce -a 'memory leak'. - - / alone would skip following whitespace and gather following -characters, rather than creating an empty name. - - ghost.ps left newerror defined as true in $error, which resulted -in an erroneous error report if a program executed a 'stop'. - - The definition of exitserver in serverdict didn't clear the -stack. - - currentfile returned an executable file, rather than a literal -one. - - setfont for Type 1 fonts didn't check the UniqueID in the font -dictionary against the one in the font's Private dictionary. - - A value stored in a dictionary under the key /xxx couldn't be -retrieved using the key (xxx), and vice versa. - - charpath with a Type 1 font on a string containing a 'space' -would produce garbage (it released the parent path inappropriately). - - bytesavailable did not work properly for terminal input. - -Changes the interface to the memory allocator so that it always takes an -element size and an element count, like calloc instead of malloc (but note -that alloc does *not* clear just-allocated blocks). Gets rid of the -special 'dynamic' allocation procedures. - -Changes the random number operators to use a better implementation. - -Changes the idiv operator so it will accept any numbers, not just -integers, as arguments. (The PostScript manual doesn't allow this, but -implementations apparently do.) - -Provides semi-fake but usable definitions for all of the color PostScript -extensions, including a real implementation of colorimage. - -No longer uses the name 'null', which is apparently reserved by Microsoft -C. Makes a number of other minor changes required to pacify the Microsoft -C compiler. - -Implements %statementedit and %lineedit. (%statementedit is equivalent to -%lineedit, which is wrong.) Changes the interactive interpreter to use -%statementedit. - -Changes the scanner to accept null, ctrl-K (vertical tab), and ctrl-L -(form feed) as whitespace. Ctrl-L terminates a comment, null and ctrl-K -do not. - -Allows a literal string as the 'proc' argument(s) for image, imagemask, -and colorimage. - -Adds the following operators/procedures: arct, cleardictstack, deletefile, -renamefile. - -Defines =print as a synonym for =, for the benefit of LaserPrep. - -Implements non-zero PaintType for the show operators (but not for -charpath) for Type 1 fonts. - -Adds the ISOLatin1Encoding encoding vector. - -Renames currentcolor and setcolor as currentgscolor and setgscolor, to -avoid conflict with the Level 2 PostScript names. Removes colorhsb, -colorrgb, hsbcolor, and rgbcolor. - -</pre><h3><a name="V2.1_Library"></a>Library</h3><pre> -Fixes bugs: - - In a couple of places, a 0 was being passed as a pointer -argument without casting, which confused the Microsoft C compiler. - - Image devices were not recognized properly in debugging -configurations. - - Inverted-color monochrome image devices were not recognized -properly. - - Images that exactly fill the drawing area rendered very slowly, -because they erroneously used the general clipping algorithm. - - Images that are 1-for-1 with the device were incorrectly scaled -by a factor of 8 in X. - - Rounding artifacts sometimes caused characters to be unevenly -offset vertically by 1 pixel. - - Type 1 fonts that used the Flex feature resulted in garbled -images. - - The show operator routines would incorrectly fill or stroke a -path that existed at the time the show was started. - - setscreen truncated the cell size instead of rounding, which -could produce off-by-1 anomalies. - - stroke would sometimes produce garbage (or nothing at all) for -very narrow lines. - - path filling would only color the pixels whose centers fell -inside the path: the Adobe specification requires coloring a pixel if any -part of it falls inside the path. - -Changes the Epson printer driver so that it drives the printer directly -rather than writing to a file. - -Changes pathbbox so that if the path is empty but there is a current -point, it returns a null rectangle at the current point. - -Changes gs_image_init to take an additional parameter (after bps) giving -the number of samples per pixel (1, 3, or 4), and an indication of whether -the samples for each pixel are together or separated (-3 or -4). - -Renames the gs_image_data and gs_imagemask_data procedures as gs_image and -gs_imagemask, and removes the old versions of the latter. - -Adds gs_colorimage. - -Replaces Snoopy's color dithering algorithm with one contributed by Paul -Haeberli. - -Changes gs_setgray, gs_[set]hsbcolor, and gs_[set]rgbcolor so that they -coerce arguments outside the range [0..1] back into the range, instead of -signalling an error. - -Makes a number of minor changes required to pacify the Microsoft C -compiler. - -Changes gs_arcto so that if the last argument is a null pointer, the -tangent points are not returned. - -Removes gs_type1addpath, which is not useful. (Clients must call -gs_type1_init and gs_type1_interpret directly.) - -Implements the 'seac' opcode for Type 1 fonts, allowing fonts with accented -characters to display properly. - -Implements the undocumented 'testadd' opcode for Type 1 fonts, which is -used by some Adobe fonts. - -Renames gs_currentcolor and gs_setcolor as gs_currentgscolor and -gs_setgscolor. Removes gs_colorhsb, gs_colorrgb, gs_hsbcolor, and -gs_rgbcolor. - -</pre> - -<hr> - -<h2><a name="Version2.0"></a>Version 2.0 (9/12/90)</h2> - -<p>The main purpose of this release is to add fonts, support for -multiple -devices, and imaging into memory. It also fixes a number of miscellaneous -bugs. (Unfortunately, accurate records of the bugs fixed are not -available.) The changes were so extensive that we chose to increment the -major version number. - -<h3><a name="V2.0_Miscellaneous"></a>Miscellaneous</h3><pre> -Doesn't attempt to open the .MAP file on Unix systems. - -Adds mention of statusd.ps to interp.doc. - -Notes that Turbo C 2.0, not 1.5, is required for building the MS-DOS -version. - -Adds a DEVICES= line to the makefile, and allows multiple devices. - -Documents, in interp.doc, the X Windows resources that Ghostscript -recognizes. - -Adds three PostScript masters to the fileset: chess.ps (+ cheq.ps), -golfer.ps, and escher.ps. - -</pre><h3><a name="V2.0_Drivers"></a>Drivers</h3><pre> -Changes the names of all the device drivers. See gdevs.mak for the -updated list. - -Adds a (working) driver for SunView. - -Adds drivers for the Sony NeWS frame buffer, and the Sony Microsystems -NWP533 printers. These drivers were contributed by users, so we aren't -prepared to answer questions about them. - -Adds a driver for the Borland Graphics Interface (BGI) for MS-DOS systems. -Note that to use this driver with a non-EGA/VGA display, you need a .BGI -file appropriate for your hardware. (The Ghostscript executable includes -the EGA/VGA driver.) - -Adds a driver for Epson printers. The driver has only been tested on an -LX-800, and on an H-P DeskJet in FX-80 emulation mode, but may work on -other models. The driver could be adapted to work on Unix systems, but as -distributed, it only works on MS-DOS systems. - -Adds a driver for the Hewlett-Packard DeskJet printer. The driver could -be adapted to work on Unix systems, but as distributed, it only works on -MS-DOS systems. - -The X Windows driver no longer waits for the user to type a character -before bringing up the initial display. - -Adds information to drivers.doc describing how to change the definition of -the device structure and procedure table. - -Extends the tile_rectangle and tile_trapezoid driver procedures to -interpret color0 = color1 = gx_no_color_index as meaning that the tile is -actually colored, not a mask. - -</pre><h3><a name="V2.0_Build_procedures"></a>Build procedures</h3><pre> -Changes the tar file so it puts everything in a directory called gs. - -Removes the -ansi switch for gcc (this was causing problems with <math.h> -on some systems). - -Changes LDPLAT to the string -X, which is appropriate for most Unix -systems (but not for SunOS 4.n). - -Adds EXTRALIBS to the makefile, for specifying additional libraries to be -linked in. - -Adds a 'clean' target for 'make', to get rid of all temporary files, the -binaries, and the executable. - -Changes names of system-specific files from gp-xxx.c to gp_xxx.c. - -Adds support for VMS (gp_vms.c and ghost.dcl). - -Creates a new file gdevs.mak, and reorganizes the other makefiles, so that -the choice of which device driver(s) to include is isolated in a single -line in the platform-specific makefile. - -Changes the standard MS-DOS makefile so it builds for 8088/86 (not 80386), -with neither -DNOPRIVATE nor -DDEBUG. - -Changes the name of the MS-DOS makefile from dos-ega.mak to msdos.mak, and -the Unix makefiles from ux-[g]cc-x.mak to unix-[g]cc.mak. - -Updates drivers.doc to describe how to add new drivers in gdevs.mak. - -Removes gdevs.ps: the drivers are now responsible for specifying the size -of the imaging region. - -</pre><h3><a name="V2.0_Interpreter"></a>Interpreter</h3><pre> -Adds a makefile macro GS_LIB_DEFAULT and an environment variable GS_LIB to -define a search path for the library (initialization and font) files, and -implements the -I switch for the same purpose (replacing -sLIB=, which was -never actually implemented). See interp.doc for details. - -No longer clears the operand stack between interactive inputs. No longer -prints the contents of the operand stack after every input in debug mode. - -Doesn't "eat" the character that the user types to proceed after a -showpage, unless it's an isolated <return>. - -Changes the prompt so that it says - GS> -if the operand stack is empty, or - GS<n> -if there are n > 0 elements on the operand stack. - -Adds -w and -h switches to the command line, equivalent to -dWIDTH= and --dHEIGHT= except that they require numeric arguments. - -Adds -q (quiet startup) switch to the command line, which suppresses some -initial messages and also has an effect equivalent to -dQUIET. - -Fixes bugs: - - = and == caused an error on some kinds of objects if the object -didn't have read access. - - cvs didn't print operator names. - - The definition of dynamic_begin in iscan.c caused the DEC VMS C -compiler to produce incorrect code. - - mul didn't return a correct (real) result when multiplying a -very large integer by an integer that wasn't very large. - - eq and ne didn't work on files, fonts, save objects, and some -operators. - - The scanner would sometimes blow up on floating point numbers -beginning with a '.'. - - flushfile didn't pop its argument from the stack. - - put and putinterval would store into a packed array. - - a few operators didn't check properly for stack underflow. - - cvrs produced wrong output for radix values greater than 10. - - The scanner would convert upper-case letters in alternate-radix -numbers wrong on Unix systems. - - String comparisons other than equality often produced the wrong -result if the strings were of different lengths. - - An ifelse as the last thing inside a forall would confuse the -execution stack. - - There were some omitted casts and 'private' declarations that -made the GNU compiler unhappy. - - There was a memory leak in the image[mask] operators that caused -516 bytes to be permanently lost each time one of them was used. - - Quoted strings of length greater than 50 and less than 100 would -get mangled when being read in. - - The scanner didn't consume the whitespace character following a -token, so programs that read data out of the program file could get -confused. - - Under rare circumstances, an object of size between 249 and 255 -bytes could get allocated on top of another object. - -Allows bind to bind packed arrays, even though they aren't normally -writable. - -Changes the length operator to allow a name as the argument. (The -PostScript manual doesn't allow this, but implementations apparently do.) - -Changes the setcachedevice operator to allow the bounding box to be -specified as a 4-element array instead of 4 scalars. (The PostScript -manual doesn't allow this, but implementations apparently do.) - -Removes a line from ghost.ps that accidentally disabled the font cache. - -Implements memory devices (makeimagedevice, copyscanlines, and makedevice -for image devices). makeimagedevice is implemented only for 1, 8, 24, and -32 bits per pixel. - -Changes the deviceparams operator so it pushes a mark on the stack below -the parameters. This is to allow for devices that have more than the -standard set of parameters. - -Replaces defaultdevicename with two new operators, getdevice and -devicename. - -Adds a flushpage operator that flushes any outstanding buffered output to -the screen. This is not the same as copypage: on printers, copypage -actually prints a page, whereas flushpage may do nothing; on displays, -flushpage and copypage may both flush output to a server. - -Adds an unread operator for pushing back a character into a file. - -Adds a description of proposed grayimage and colorimage operators to -ghost.doc, even though they aren't implemented yet. - -Changes the name of the currentfileposition operator to fileposition. - -Removes the framedevice operator, since the new device operators supersede -it. - -Adds a writeppmfile operator, for writing the contents of a memory device -to a ppm file. - -Makes Ghostscript work even when the >> operator doesn't sign-extend -negative numbers. (This has not been tested.) - -Adds the Symbol encoding to ghost.ps. - -Adds two new file-related operators, filename and findlibfile. See -ghost.doc and interp.doc for details. - -Adds type1encrypt and type1decrypt operators for manipulating Adobe Type 1 -encoded fonts. - -Changes the imagecharpath and addcharpath operators to type1imagepath and -type1addpath. These operators now work with the Adobe Type 1 font -encoding. - -Adds the type1decryptfile operator for reading Adobe Type 1 encrypted -fonts. - -</pre><h3><a name="V2.0_Library"></a>Library</h3><pre> -Fixes bugs: - - curveto and lineto didn't check for the current point being -defined. - - stringwidth would fail if there was no current point. - - There were omitted casts that made the GNU compiler unhappy. - - Line caps and joins didn't always work. - - Dashed lines didn't work at all. - - If you read out the current matrix while inside a BuildChar -procedure, the result was garbage. - - image[mask] would crash if you gave it a single string with more -than 64K-1 pixels (MS-DOS only). - - Filling with a gray pattern sometimes wrote into pixels beyond -the right edge of the region (MS-DOS only). - - The font cache would mistake fonts for each other if both fonts -had a default (unsupplied) "unique ID". - - When a character was entered into the font cache for the first -time, sometimes it would display as garbage and/or displaced vertically -from its proper position. - -Implements gs_makeimagedevice, gs_copyscanlines, gs_getdevice, -gs_devicename, gs_flushpage, gs_writeppmfile, gs_type1encrypt, -gs_type1decrypt, gs_type1imagepath, and gs_type1addpath procedures -corresponding to the new operators in the interpreter (see preceding -section). - -Changes [gs_]setdevice so that it does an erasepage when it first opens -the device. - -Changes definition of gx_device structure as follows. NOTE: THIS AFFECTS -ALL DRIVERS. - - - Removes bits_from_MSB (which wasn't actually used, in any case). - Ghostscript now assumes officially, as it always did in - practice, that device bitmaps are stored MSB first, i.e., X=0 - corresponds to the 0x80 bit in the first byte. - - - Removes the initial_matrix member, which wasn't actually being - set up. - - - Adds a new member 'name', a string giving the device name. - - - Adds new members 'x_pixels_per_inch' and 'y_pixels_per_inch'. - These are only used by the default initial_matrix procedure - (see below). - - - Adds a new procedure 'output_page'. The default implementation - (gx_default_output_page) just calls the sync_output procedure. - - - Adds a new procedure 'get_initial_matrix'. The default - procedure uses the width, height, and x/y_pixels_per_inch - members to compute the matrix, assuming that X values run from - right to left, and Y values run from top to bottom. - -Changes the names of the allocation procedure types gs_proc_alloc and -gs_proc_free to proc_alloc_t and proc_free_t, and moves them from gs.h to -std.h. - -Makes Ghostscript work even when the >> operator doesn't sign-extend -negative numbers. (This has not been tested.) - -</pre> - -<!-- [3.0 begin visible trailer] =========================================== --> -<hr> - -<p> -<small>Copyright © 1996, 1997, 1998 Aladdin Enterprises. -All rights reserved.</small> - -<p> -This software is provided AS-IS with no warranty, either express or -implied. - -This software is distributed under license and may not be copied, -modified or distributed except as expressly authorized under the terms -of the license contained in the file LICENSE in this distribution. - -<p> -<small>Ghostscript version 7.07, 17 May 2003 - -<!-- [3.0 end visible trailer] ============================================= --> - -</body> -</html> |