summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipng/dvipng.info
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/dvipng/dvipng.info')
-rw-r--r--Build/source/texk/dvipng/dvipng.info977
1 files changed, 0 insertions, 977 deletions
diff --git a/Build/source/texk/dvipng/dvipng.info b/Build/source/texk/dvipng/dvipng.info
deleted file mode 100644
index a575c11a9fd..00000000000
--- a/Build/source/texk/dvipng/dvipng.info
+++ /dev/null
@@ -1,977 +0,0 @@
-This is dvipng.info, produced by makeinfo version 4.8 from dvipng.texi.
-
-INFO-DIR-SECTION TeX
-START-INFO-DIR-ENTRY
-* DVI-to-PNG: (dvipng). Translating TeX DVI files to Portable Network Graphics (PNG).
-* dvipng: (dvipng). A DVI-to-PNG translator.
-END-INFO-DIR-ENTRY
-
-
-File: dvipng.info, Node: Top, Next: Introduction, Up: (dir)
-
-dvipng
-******
-
-This manual documents dvipng, a program to translate a DVI (DeVice
-Independent) file into PNG (Portable Network Graphics).
-
- This file documents dvipng version 1.6
-
- Corrections or perhaps rewrites of sections are _very welcome_.
-
- Jan-AAke Larsson
-
-* Menu:
-
-* Introduction:: Introduction
-* Installation:: How to compile and install dvipng
-* Basic usage:: First things first
-* Command-line options:: Advanced usage
-* Diagnosing problems:: Problems?
-* Color:: Using color with dvipng
-* Copying:: GNU General Public License
-* Credits:: People who have contributed
-* Index:: General index
-
-
-File: dvipng.info, Node: Introduction, Next: Installation, Prev: Top, Up: Top
-
-1 Introduction
-**************
-
-This program makes PNG and/or GIF graphics from DVI files as obtained
-from TeX and its relatives.
-
- If GIF support is enabled, GIF output is chosen by using the
-`dvigif' binary or with the `--gif' option.
-
- It is intended to produce anti-aliased screen-resolution images as
-fast as is possible. The target audience is people who need to generate
-and regenerate many images again and again. The primary target is the
-preview-latex (X)Emacs package, a package to preview formulas from
-within (X)Emacs. Yes, you get to see your formulas in the (X)Emacs
-buffer, see `http://preview-latex.sf.net'.
-
- Another example is WeBWorK, an internet-based method for delivering
-homework problems to students over the internet, giving students
-instant feedback as to whether or not their answers are correct, see
-`http://webwork.math.rochester.edu'.
-
- Other applications may also benefit, like web applications as
-latex2html and WYSIWYG editors like LyX.
-
- The benefits of `dvipng'/`dvigif' include
-
- * Speed. It is a very fast bitmap-rendering code for DVI files. On a
- fairly low-end laptop, it takes less than a second to generate 150
- one-formula images. This makes dvipng suitable for generating large
- amounts of images on-the-fly, as needed in preview-latex, WeBWorK
- and others.
-
- * It does not read the postamble, so it can be started before TeX
- finishes. There is a -follow switch that makes dvipng wait at EOF
- for further output, unless it finds the POST marker that indicates
- the end of the DVI.
-
- * Interactive query of options. dvipng can read options interactively
- through stdin, and all options are usable. It is even possible to
- change the input file through this interface.
-
- * Supports PK, VF, PostScript Type1, and TrueType fonts, color
- specials and simple PostScript inclusion specials.
-
- * and more...
-
-
-
-File: dvipng.info, Node: Installation, Next: Basic usage, Prev: Introduction, Up: Top
-
-2 Installation
-**************
-
-Installing dvipng should be simple: merely `./configure', `make', and
-`make install'.
-
-* Menu:
-
-* Prerequisites::
-* Configure::
-* Build/install::
-* Installation outside the texmf tree::
-* Advice for non-privileged users::
-
-
-File: dvipng.info, Node: Prerequisites, Next: Configure, Up: Installation
-
-2.1 Prerequisites
-=================
-
- * The GD Graphics Draw library, libgd
-
- The drawing library `libgd' is necessary, and is downloadable at
- `http://www.boutell.com/gd', and there are binary packages for
- most operating systems from their respective distributors. In any
- case, the latest version of the library installs using `autoconf'
- so it should not be difficult for you to install it from source,
- and then proceed with installing dvipng.
-
- * The path-searching library kpathsea
-
- Kpathsea is most likely included in your LaTeX installation, but it
- may happen that ./configure does not find it; see below. If you do
- not have it, download it from `http://www.ctan.org' and compile it.
- I have no experience with this, so I cannot help much here.
-
- * FreeType 2 and/or T1lib
-
- While not strictly necessary, you may want to have FreeType 2 or
- T1lib available. Their presence will enable direct support for
- PostScript fonts in dvipng, rather than using `gsftopk' for
- rendering the fonts. If you have PostScript versons of Computer
- Modern installed, there will be no need to generate bitmapped
- variants on disk of these. Then, you can render images at
- different (and unusual) resolutions without cluttering the disk
- with lots of bitmapped fonts. If both FreeType 2 and T1lib are
- present, FreeType will be internally preferred by dvipng, but
- T1lib can be chosen at runtime.
-
- * libpng and libz
-
- To be able to compress and write PNG files to disk, dvipng (or
- really libgd) uses libpng which in turn uses libz. These should be
- available on any modern system, if not, download them and install
- them.
-
- * The `texinfo' package
-
- This is needed for building the documentation.
-
-
-File: dvipng.info, Node: Configure, Next: Build/install, Prev: Prerequisites, Up: Installation
-
-2.2 Configure
-=============
-
-The first step is to configure the source code, telling it where
-various files will be. To do so, run
-
- ./configure OPTIONS
-
- (Note: if you have fetched dvipng from CVS rather than a regular
-release, you will have to first generate `./configure' by running
-`autoconf' 2.53 or later in the `preview' directory.)
-
- On many machines, you will not need to specify any options, but if
-`configure' cannot determine something on its own, you'll need to help
-it out. For a list of the options type
-
- ./configure --help
-
- On some machines, the libraries will be installed in directories that
-are not in the linker's search path. This will generate an error when
-running `./configure', indicating that it cannot find libgd or
-libkpathsea (most likely). You then need to specify the path to the
-respective library's object files. They are typically called e.g.,
-`libgd.a' or `libgd.so'. If they are located in e.g., `/sw/local/lib',
-do
-
- ./configure LDFLAGS=-L/sw/local/lib
-
- If the library is available as a shared object file (`.so'), the
-runtime linker may also need to be told where to find the library, then
-use
-
- ./configure LDFLAGS='-L/sw/local/lib -R/sw/local/lib'
-
- When either of these is necessary, it is likely that the C header
-files are also installed in directories that are not in the C
-preprocessor's search path. This will also generate an error when
-running `./configure', indicating that it cannot find e.g., `gd.h' or
-`kpathsea.h' (most likely). You then need to specify the path to the
-respective library's C header files. If they are located in e.g.,
-`/sw/local/include', do
-
- ./configure CPPFLAGS=-I/sw/local/include
-
- On my SUN Solaris workstation, I had to combine this into
-
- ./configure CPPFLAGS='-I/sw/local/include -I/sw/tex/teTeX/1.0/include'\
- LDFLAGS='-L/sw/local/lib -R/sw/local/lib -L/sw/tex/teTeX/1.0/lib/'
-
-where the backslash denotes a continuation of the line.
-
-
-File: dvipng.info, Node: Build/install, Next: Installation outside the texmf tree, Prev: Configure, Up: Installation
-
-2.3 Build/install
-=================
-
-Once `configure' has been run, simply enter
-
- make
- at the prompt to compile the C code, and build the documentation
-files. To install the files into the locations chosen earlier, type
-
- make install
-
-You may need special privileges to install, e.g., if you are installing
-into system directories.
-
-
-File: dvipng.info, Node: Installation outside the texmf tree, Next: Advice for non-privileged users, Prev: Build/install, Up: Installation
-
-2.4 Installation outside the texmf tree
-=======================================
-
-In some cases, a dvipng binary installed outside the texmf tree will
-not be able to find virtual fonts, or the PostScript font maps
-(normally used by dvips). This may be because _only_ $SELFAUTOLOC,
-$SELFAUTODIR, and $SELFAUTOPARENT are used in the texmf tree
-configuration file `texmf.cnf'. If so, give the switch
-`--enable-selfauto-set' to `./configure'. This will make dvipng adjust
-these three internally so that kpathsea thinks that dvipng _is_
-installed in the texmf tree.
-
-
-File: dvipng.info, Node: Advice for non-privileged users, Prev: Installation outside the texmf tree, Up: Installation
-
-2.5 Installation for non-privileged users
-=========================================
-
-Often people without system administration privileges want to install
-software for their private use. In that case you need to specify more
-options to the `configure' script, usually this is done by using the
-`--prefix' option to the `configure' script, and let it point to the
-personal home directory. In that way, resulting binaries will be
-installed under the `bin' subdirectory of your home directory, manual
-pages under `man' and so on. That way, it is reasonably easy to
-maintain a bunch of additional packages, since the prefix argument is
-supported by most `configure' scripts.
-
- You'll have to add something like `/home/myself/bin' to your `PATH'
-shell variable, if it isn't there already, and similarly set the
-`INFOPATH' variable to be able to access the documentation.
-
-
-File: dvipng.info, Node: Basic usage, Next: Command-line options, Prev: Installation, Up: Top
-
-3 Basic usage of dvipng
-***********************
-
-To use dvipng at its simplest, simply type
-
- dvipng foo
-
-where `foo.dvi' is the output of TeX that you want to convert to PNG
-format. If there are four pages in `foo.dvi', those pages will be
-output as `foo1.png', `foo2.png', `foo3.png', and `foo4.png',
-respectively.
-
- If you have enabled the PostScript font support (via FreeType or
-T1lib), fonts will be rendered as they are needed. Otherwise, if you
-use fonts that have not been used on your system before, they may be
-automatically generated; this process can take a few minutes, so
-progress reports appear by default. The next time the same font is
-used, it will have been saved on disk, so rendering will go much
-faster. (If dvipng tries to endlessly generate the same fonts over and
-over again, something is wrong. *Note Unable to generate fonts:
-(kpathsea)Unable to generate fonts.)
-
- Many options are available (see the next section). For a brief
-summary of available options, just type
-
- dvipng --help
-
-
-File: dvipng.info, Node: Command-line options, Next: Diagnosing problems, Prev: Basic usage, Up: Top
-
-4 Command-line options
-**********************
-
-dvipng has a plethora of command line options. Reading through this
-section will give a good idea of the capabilities of the driver.
-
-* Menu:
-
-* Option summary:: Quick listing, from dvipng --help.
-* Option details:: More information about each option.
-
-
-File: dvipng.info, Node: Option summary, Next: Option details, Up: Command-line options
-
-4.1 Option summary
-==================
-
-Here is a handy summary of the options; it is printed out when you run
-dvipng with no arguments or with the standard `--help' option.
-
- This is dvipng 1.6 Copyright 2002-2005 Jan-Ake Larsson
-
- Usage: dvipng [OPTION]... FILENAME[.dvi]
- Options are chosen to be similar to dvips' options where possible:
- -d # Debug (# is the debug bitmap, 1 if not given)
- -D # Output resolution
- -l # Last page to be output
- --mode s MetaFont mode (default 'cx')
- -M* Don't make PK fonts
- -o f Output file, '%d' is pagenumber
- -O c Image offset
- -p # First page to be output
- -pp #,#.. Page list to be output
- -q* Quiet operation
- -r* Reverse order of pages
- -T c Image size (also accepts '-T bbox' and '-T tight')
- -v* Verbose operation
- -x # Override dvi magnification
- - Interactive query of options
-
- These do not correspond to dvips options:
- -bd # Transparent border width in dots
- -bd s Transparent border fallback color (TeX-style color)
- --bdpi # Set the base (Metafont) resolution
- -bg s Background color (TeX-style color or 'Transparent')
- --depth* Output the image depth on stdout
- --dvinum* Use TeX page numbers in output filenames
- -fg s Foreground color (TeX-style color)
- --follow* Follow mode
- --gamma # Control color interpolation
- --gif Output GIF images (dvigif default)
- --height* Output the image height on stdout
- --noghostscript* Don't use ghostscript for PostScript specials
- --nogssafer* Don't use -dSAFER in ghostscript calls
- --picky When a warning occurs, don't output image
- --png Output PNG images (dvipng default)
- --strict When a warning occurs, exit
- --t1lib* T1lib font rendering (default on)
- --truecolor* Truecolor output
- -Q # Quality (T1lib and PK subsampling)
- -z # PNG compression level
-
- # = number f = file s = string * = suffix, '0' to turn off
- c = comma-separated dimension pair (e.g., 3.2in,-32.1cm)
-
-
-File: dvipng.info, Node: Option details, Prev: Option summary, Up: Command-line options
-
-4.2 Option details
-==================
-
-Many of the parameterless options listed here can be turned off by
-suffixing the option with a zero (`0'); for instance, to turn off page
-reversal, use `-r0'. Such options are marked with a trailing `*'.
-
-`-'
- Read additional options from standard input after processing the
- command line.
-
-`--help'
- Print a usage message and exit.
-
-`--version'
- Print the version number and exit.
-
-`-bd NUM'
-
-`-bd COLOR_SPEC'
-
-`-bd 'NUM COLOR_SPEC''
- Set the pixel width of the transparent border (default 0). Using
- this option will make the image edges transparent, but it only
- affects pixels with the background color. Giving a COLOR_SPEC will
- set the fallback color, to be used in viewers that cannot handle
- transparency (the default is the background color). The color spec
- should be in TeX color \special syntax, e.g., 'rgb 1.0 0.0 0.0'.
- Setting the fallback color makes the default border width 1 px.
- *Note Color::.
-
-`--bdpi NUM'
- Set the base (Metafont) resolution, both horizontal and vertical,
- to NUM dpi (dots per inch). This option is necessary when manually
- selecting Metafont mode with the -mode option (see below).
-
-`-bg COLOR_SPEC'
- Choose background color for the images. This option will be
- ignored if there is a background color \special in the DVI. The
- color spec should be in TeX color \special syntax, e.g., 'rgb 1.0
- 0.0 0.0'. You can also specify 'Transparent' or 'transparent'
- which will give you a transparent background with the normal
- background as a fallback color. A capitalized 'Transparent' will
- give a full-alpha transparency, while an all-lowercase
- 'transparent' will give a simple fully transparent background with
- non-transparent antialiased pixels. The latter would be suitable
- for viewers who cannot cope with a true alpha channel. GIF images
- do not support full alpha transparency, so in case of GIF output,
- both variants will use the latter behaviour. *Note Color::.
-
-`-d NUM'
- Set the debug flags, showing what dvipng (thinks it) is doing.
- This will work unless dvipng has been compiled without the `DEBUG'
- option (not recommended). Set the flags as you need them, use `-d
- -1' as the first option for maximum output. *Note Debug options::.
-
-`-D NUM'
- Set the output resolution, both horizontal and vertical, to NUM
- dpi (dots per inch).
-
- One may want to adjust this to fit a certain text font size (e.g.,
- on a web page), and for a text font height of FONT_PX pixels (in
- Mozilla) the correct formula is
- DPI = FONT_PX * 72.27 / 10 [px * TeXpt/in / TeXpt]
- The last division by ten is due to the standard font height 10pt in
- your document, if you use 12pt, divide by 12. Unfortunately, some
- proprietary browsers have font height in pt (points), not pixels.
- You have to rescale that to pixels, using the screen resolution
- (default is usually 96 dpi) which means the formula is
- FONT_PX = FONT_PT * 96 / 72 [pt * px/in / (pt/in)]
- On some high-res screens, the value is instead 120 dpi. Good luck!
-
-`--depth*'
- Report the depth of the image. This only works reliably when the
- LaTeX style `preview.sty' from preview-latex is used. It reports
- the number of pixels from the bottom of the image to the baseline
- of the image. This can be used for vertical positioning of the
- image in, e.g., web documents, where one would use (Cascading
- StyleSheets 1)
- <IMG SRC="FILENAME.PNG" STYLE="vertical-align: -DEPTHpx">
- The depth is a negative offset in this case, so the minus sign is
- necessary, and the unit is pixels (px).
-
-`--dvinum*'
- Set this option to make the output page number be the TeX page
- numbers rather than the physical page number. See the `-o' switch.
-
-`-fg COLOR_SPEC'
- Choose foreground color for the images. This option will be
- ignored if there is a foreground color \special in the DVI. The
- color spec should be in TeX color \special syntax, e.g., 'rgb 1.0
- 0.0 0.0'. *Note Color::.
-
-`--follow*'
- Enable follow mode. One of the benefits of dvipng is that it does
- not read the postamble, so it can be started before TeX finishes.
- This switch makes dvipng wait at EOF for further output, unless it
- finds the POST marker that indicates the end of the DVI. This is
- similar to `tail -f' but for DVI-to-PNG conversion.
-
-`--freetype*'
- Enable/disable FreeType font rendering (default on). This option is
- available if the FreeType2 font library was present at compilation
- time. If this is the case, dvipng will have direct support for
- PostScript Type1 and TrueType fonts internally, rather than using
- `gsftopk' for rendering the fonts. If you have PostScript versions
- of Computer Modern installed, there will be no need to generate
- bitmapped variants on disk of these. Then, you can render images
- at different (and unusual) resolutions without cluttering the disk
- with lots of bitmapped fonts. Note that if you have both FreeType
- and T1lib on your system, FreeType will be preferred by dvipng. If
- you for some reason would want to use T1lib rendering, use this
- option.
-
-`--gamma NUM'
- Control the interpolation of colors in the greyscale anti-aliasing
- color palette. Default value is 1.0. For 0 < NUM < 1, the fonts
- will be lighter (more like the background), and for NUM > 1, the
- fonts will be darker (more like the foreground).
-
-`--gif*'
- The images are output in the GIF format, if GIF support is
- enabled. This is the default for the `dvigif' binary, which only
- will be available when GIF support is enabled. See also the
- `--png' option.
-
-`--height*'
- Report the height of the image. This only works reliably when the
- LaTeX style `preview.sty' from preview-latex is used. It reports
- the number of pixels from the top of the image to the baseline of
- the image. The total height of the image is obtained as the sum of
- the values reported from -height and the -depth.
-
-`-l [=]NUM'
- The last page printed will be the first one numbered NUM. Default
- is the last page in the document. If NUM is prefixed by an equals
- sign, then it (and the argument to the `-p' option, if specified)
- is treated as a physical (absolute) page number, rather than a
- value to compare with the TeX `\count0' values stored in the DVI
- file. Thus, using `-l =9' will end with the ninth page of the
- document, no matter what the pages are actually numbered.
-
-`--mode MODE'
- Use MODE as the Metafont device name for the PK fonts (both for
- path searching and font generation). This needs to be augmented
- with the base device resolution, given with the `--bdpi' option.
- See the file `ftp://ftp.tug.org/tex/modes.mf' for a list of
- resolutions and mode names for most devices. *Note Unable to
- generate fonts: (kpathsea)Unable to generate fonts.
-
-`-M*'
- Turns off automatic PK font generation (`mktexpk'). This will have
- no effect when using PostScript fonts, since no PK font generation
- will be done anyway.
-
-`--noghostscript*'
- This switch prohibits the internal call to GhostScript for
- displaying PostScript specials. `--noghostscript0' turns the call
- back on.
-
-`--nogssafer*'
- Normally, if GhostScript is used to render PostScript specials, the
- GhostScript interpreter is run with the option `-dSAFER'. The
- `-nogssafer' option runs GhostScript without `-dSAFER'. The
- `-dSAFER' option in Ghostscript disables PostScript operators such
- as deletefile, to prevent possibly malicious PostScript programs
- from having any effect.
-
-`-o NAME'
- Send output to the file NAME. A single occurrence of `%d' or
- `%01d', ..., `%09d' will be exchanged for the physical page number
- (this can be changed, see the `--dvinum' switch). The default
- output filename is `FILE%d.png' where the input DVI file was
- `FILE.dvi'.
-
-`-O X-OFFSET,Y-OFFSET'
- Move the origin by X-OFFSET,Y-OFFSET, a comma-separated pair of
- dimensions such as `.1in,-.3cm'. The origin of the page is
- shifted from the default position (of one inch down, one inch to
- the right from the upper left corner of the paper) by this amount.
-
-`-p [=]NUM'
- The first page printed will be the first one numbered NUM. Default
- is the first page in the document. If NUM is prefixed by an
- equals sign, then it (and the argument to the `-l' option, if
- specified) is treated as a physical (absolute) page number, rather
- than a value to compare with the TeX `\count0' values stored in the
- DVI file. Thus, using `-p =3' will start with the third page of
- the document, no matter what the pages are actually numbered.
-
-`--picky*'
- No images are output when a warning occurs. Normally, dvipng will
- output an image in spite of a warning, but there may be something
- missing in this image. One reason to use this option would be if
- you have a more complete but slower fallback converter. Mainly,
- this is useful for failed figure inclusion and unknown \special
- occurrences, but warnings will also occur for missing or unknown
- color specs and missing PK fonts.
-
-`--png*'
- The images are output in the PNG format. This is the default for
- the `dvipng' binary. See also the `--gif' option.
-
-`-pp FIRSTPAGE-LASTPAGE'
- Print pages FIRSTPAGE through LASTPAGE; but not quite equivalent
- to `-p FIRSTPAGE -l LASTPAGE'. For example, when rendering a book,
- there may be several instances of a page in the DVI file (one in
- `\frontmatter', one in `\mainmatter', and one in `\backmatter').
- In case of several pages matching, `-pp FIRSTPAGE-LASTPAGE' will
- render _all_ pages that matches the specified range, while `-p
- FIRSTPAGE -l LASTPAGE' will render the pages from the _first_
- occurrence of FIRSTPAGE to the _first_ occurrence of LASTPAGE.
- This is the (undocumented) behaviour of dvips. In dvipng you can
- give both kinds of options, in which case you get all pages that
- matches the range in `-pp' between the pages from `-p' to `-l'.
- Also multiple `-pp' options accumulate, unlike `-p' and `-l'. The
- `-' separator can also be `:'. Note that `-pp -1' will be
- interpreted as "all pages up to and including 1", if you want a
- page numbered -1 (only the table of contents, say) put `-pp -1--1',
- or more readable, `-pp -1:-1'.
-
-`-q*'
- Run quietly. Don't chatter about pages converted, etc. to standard
- output; report no warnings (only errors) to standard error.
-
-`-Q NUM'
- Set the quality to NUM. That is, choose the number of antialiasing
- levels for PK and T1lib rendering to be NUM*NUM. The default value
- is 4 which gives 16 levels of antialiasing for antialiased fonts
- from these two. If FreeType is available, its rendering is
- unaffected by this option.
-
-`-r*'
- Toggle output of pages in reverse/forward order. By default, the
- first page in the DVI is output first.
-
-`-T IMAGE_SIZE'
- Set the image size to IMAGE_SIZE which can be either of `bbox',
- `tight', or a comma-separated pair of dimensions HSIZE,VSIZE such
- as `.1in,.3cm'. The default is `bbox' which produces a PNG that
- includes all ink put on the page and in addition the DVI origin,
- located 1in from the top and 1in from the left edge of the paper.
- This usually gives whitespace above and to the left in the
- produced image. The value `tight' will make dvipng only include
- all ink put on the page, producing neat images. This option
- overrides any papersize special in the DVI file.
-
-`--t1lib*'
- Enable/disable T1lib font rendering (default on). This option is
- available if the T1lib font library was present at compilation
- time. If this is the case, dvipng will have direct support for
- PostScript Type1 fonts internally, rather than using `gsftopk' for
- rendering the fonts. If you have PostScript versions of Computer
- Modern installed, there will be no need to generate bitmapped
- variants on disk of these. Then, you can render images at
- different (and unusual) resolutions without cluttering the disk
- with lots of bitmapped fonts. Note that if you have both FreeType
- and T1lib on your system FreeType will be preferred by dvipng, and
- if you for some reason rather want to use T1lib, give the option
- `--freetype0' (see above).
-
-`--truecolor*'
- On systems with a fairly new `libgd', one can choose to generate
- truecolor output. This will not be necessary in general unless you
- include truecolor images via a PostScript special (i.e., the
- `graphics' or `graphicx' package). It will lead to longer
- execution time, mostly because more data is written to disk.
-
-`-v*'
- Enable verbose operation. This will currently indicate what fonts
- is used, in addition to the usual output.
-
-`-x NUM'
- Set the x magnification ratio to NUM/1000. Overrides the
- magnification specified in the DVI file. Must be between 10 and
- 100000. It is recommended that you use standard magstep values
- (1095, 1200, 1440, 1728, 2074, 2488, 2986, and so on) to help
- reduce the total number of PK files generated. NUM may be a real
- number, not an integer, for increased precision.
-
-`-z NUM'
- Set the PNG compression level to NUM. This option is enabled if
- your `libgd' is new enough. The default compression level is 1,
- which selects maximum speed at the price of slightly larger PNGs.
- For an older `libgd', the hard-soldered value 5 is used. The
- include file `png.h' says
-
- Currently, valid values range from 0 - 9, corresponding
- directly to the zlib compression levels 0 - 9 (0 - no
- compression, 9 - "maximal" compression). Note that tests have
- shown that zlib compression levels 3-6 usually perform as
- well as level 9 for PNG images, and do considerably fewer
- calculations. In the future, these values may not correspond
- directly to the zlib compression levels.
-
-
-File: dvipng.info, Node: Diagnosing problems, Next: Color, Prev: Command-line options, Up: Top
-
-5 Diagnosing problems
-*********************
-
-You've gone through all the trouble of installing dvipng, carefully read
-all the instructions in this manual, and still can't get something to
-work. The following sections provide some helpful hints if you find
-yourself in such a situation.
-
- Bug reports should be sent to <dvipng@nongnu.org>.
-
- Questions, suggestions for new features, pleas for help, and/or
-praise should go to <dvipng@nongnu.org>. For more information on this
-mailing list, send a message with just the word `help' as subject or
-body to <dvipng-request@nongnu.org> or look at
-`http://lists.nongnu.org/mailman/listinfo/dvipng'.
-
- Offers to support further development will be appreciated. For
-developer access, ask on <dvipng@nongnu.org>.
-
- For details on the TeX path-searching library, and `mktexpk'
-problems, *note Common problems: (kpathsea)Common problems.
-
-* Menu:
-
-* Debug options:: Getting diagnostics.
-* Included graphics problems:: Figures are wrongly rendered.
-
-
-File: dvipng.info, Node: Debug options, Next: Included graphics problems, Up: Diagnosing problems
-
-5.1 Debug options
-=================
-
-The `-d' flag to dvipng helps in tracking down certain errors. The
-parameter to this flag is an integer that tells what errors are
-currently being tracked. To track a certain class of debug messages,
-simply provide the appropriate number given below; if you wish to track
-multiple classes, sum the numbers of the classes you wish to track. To
-track all classes, you can use `-1'.
-
- Some of these debugging options are actually provided by Kpathsea
-(*note Debugging: (kpathsea)Debugging.).
-
- The classes are:
-1
- Normal dvi op-codes
-
-2
- Virtual fonts
-
-4
- PK fonts
-
-8
- TFM files
-
-16
- Glyph rendering
-
-32
- FreeType calls
-
-64
- Encoding loads
-
-128
- Color specials
-
-256
- GhostScript specials
-
-512
- T1lib calls
-
-1024
- Kpathsea `stat' calls
-
-2048
- Kpathsea hash table lookups
-
-4096
- Kpathsea path element expansion
-
-8192
- Kpathsea path searches
-
-
-
-File: dvipng.info, Node: Included graphics problems, Prev: Debug options, Up: Diagnosing problems
-
-5.2 Included graphics problems
-==============================
-
-The most common problem with including graphics is an incorrect bounding
-box. Complain to whoever wrote the software that generated the file if
-the bounding box is indeed incorrect.
-
- An additional problem is that the image in dvipng is always clipped
-to the bounding box. This is because the image is rendered by
-GhostScript by an internal call and then copied to the dvipng image. At
-present no workaround is known, but there may be one for a future
-GhostScript. We'll see.
-
-
-File: dvipng.info, Node: Color, Next: Copying, Prev: Diagnosing problems, Up: Top
-
-6 Color
-*******
-
-To support color, dvipng recognizes a certain set of specials. These
-specials start with the keyword `color' or the keyword `background',
-followed by a color specification.
-
-* Menu:
-
-* Color specifications::
-* Color specials::
-
-
-File: dvipng.info, Node: Color specifications, Next: Color specials, Up: Color
-
-6.1 Color specifications
-========================
-
-The color specification supported by dvipng is by-value or by-name. The
-by-value spec starts with the name of a color model (one of `rgb',
-`hsb', `cmy', `cmyk', or `gray') followed by the appropriate number of
-parameters. Thus, the color specification `rgb 0.3 0.4 0.5' would
-correspond to the color that is `0.3 0.4 0.5' in its red, blue and
-green values. The color used internally in dvipng is `RGB' (discretized
-to 256 levels), for details on the formulas used in conversion, see the
-`xcolor' documentation.
-
- By-name color specifications are single (case-dependent) words and
-are compared with color names defined in `dvipsnam.def' (from the
-`graphics' bundle), `svgnam.def' and `xcolor.sty' (from the `xcolor'
-bundle).
-
- On the command-line, the name `Transparent' can also be used in as
-an argument to `--bg' to choose transparent background. *Note Option
-details::.
-
-
-File: dvipng.info, Node: Color specials, Prev: Color specifications, Up: Color
-
-6.2 Color specials
-==================
-
-We will describe `background' first, since it is the simplest. The
-`background' keyword must be followed by a color specification. That
-color specification is used as a fill color for the background. The
-last `background' special on a page is the one that gets used, and is
-used for the whole of the page image. (This is possible because the
-prescan phase of dvipng notices all of the color specials so that the
-appropriate information can be written out during the second phase.)
-
- The `color' special itself has three forms. The first is just
-`color' followed by a color specification. In this case, the current
-global color is set to that color; the color stack must be empty when
-such a command is executed.
-
- The second form is `color push' followed by a color specification.
-This saves the current color on the color stack and sets the color to be
-that given by the color specification. This is the most common way to
-set a color.
-
- The final version of the `color' special is just `color pop', with
-no color specification; this says to pop the color last pushed on the
-color stack from the color stack and set the current color to be that
-color.
-
- dvipng correctly handles these color specials across pages, even when
-the pages are rendered repeatedly or in reverse order.
-
-
-File: dvipng.info, Node: Credits, Next: Index, Prev: Copying, Up: Top
-
-7 Credits
-*********
-
-A number of persons have contributed, if I forget to mention someone, I
-apologize. First and foremost we have David Kastrup whose preview-latex
-project provided the incentive to write this program. There is also a
-number of people who have contributed by reporting bugs and suggesting
-improvements as the thing has evolved. These include but is perhaps not
-limited to (in semi-random order): Thomas Esser (teTeX), Christian
-Schenk (MIKTeX), Brian R Furry (debian package), Angus Leeming (LyX),
-Thomas Boutell (libgd), John Jones (first user report), Uwe Kern
-(xcolor), Alan Shutko, Reiner Stieb, Nick Alcock, Adam Buchbinder,
-Svend Tollak Munkejord, James Longstreet, Bernhard Simon, Bob McElrath,
-Georg Schwarz, Jason Farmer, Brian V. Smith, Samuel Hathaway, Thomas R.
-Shemanske, Stephen Gibson, Christian Ridderstro"m, Ezra Peisach,
-William H Wheeler, Thomas Klausner, Harald Koenig, Adrian Bunk, Kevin
-Smith, and Jason Riedy.
-
-
-File: dvipng.info, Node: Copying, Next: Credits, Prev: Color, Up: Top
-
-8 Copying
-*********
-
-This program is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2 of the License, or (at your
-option) any later version.
-
- This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
- You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software Foundation,
-Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-
-
-Copyright (C) 2002-2005 Jan-AAke Larsson
-
-
-File: dvipng.info, Node: Index, Prev: Credits, Up: Top
-
-Index
-*****
-
-
-* Menu:
-
-* -dSAFER: Option details. (line 164)
-* absolute page number, and -l: Option details. (line 137)
-* absolute page number, and -p: Option details. (line 185)
-* antialiasing levels, number of: Option details. (line 229)
-* background color (option): Option details. (line 40)
-* base resolution, setting: Option details. (line 35)
-* baseline reporting: Option details. (line 76)
-* color specifications: Color specifications.
- (line 6)
-* command-line options: Command-line options.
- (line 6)
-* compilation: Installation. (line 6)
-* compression: Option details. (line 284)
-* configuration, of dvipng: Installation. (line 6)
-* dark fonts: Option details. (line 118)
-* debugging <1>: Diagnosing problems. (line 6)
-* debugging: Option details. (line 54)
-* debugging options: Debug options. (line 6)
-* depth reporting: Option details. (line 76)
-* first page printed: Option details. (line 185)
-* follow mode: Option details. (line 97)
-* font generation, avoiding: Option details. (line 154)
-* foreground color (option): Option details. (line 91)
-* FreeType font rendering: Option details. (line 104)
-* fuzzy images: Option details. (line 118)
-* gamma: Option details. (line 118)
-* GhostScript and -dSAFER: Option details. (line 164)
-* GhostScript, turning off: Option details. (line 159)
-* GIF image format: Option details. (line 124)
-* graphics inclusion problems: Included graphics problems.
- (line 6)
-* height reporting: Option details. (line 130)
-* installation, of dvipng: Installation. (line 6)
-* invoking dvipng: Basic usage. (line 6)
-* last page printed: Option details. (line 137)
-* light fonts: Option details. (line 118)
-* magnification, overriding DVI: Option details. (line 276)
-* Metafont mode, specifying: Option details. (line 146)
-* mktexpk, avoiding: Option details. (line 154)
-* mode name, specifying: Option details. (line 146)
-* no erroneous images: Option details. (line 194)
-* offset pages: Option details. (line 179)
-* option, details of: Option details. (line 6)
-* options, debugging: Debug options. (line 6)
-* options, dvipng: Command-line options.
- (line 6)
-* options, reading from standard input: Option details. (line 11)
-* options, summary: Option summary. (line 6)
-* output resolution, setting: Option details. (line 60)
-* output, redirecting: Option details. (line 172)
-* page range: Option details. (line 207)
-* page, first printed: Option details. (line 185)
-* page, last printed: Option details. (line 137)
-* physical page number, and -l: Option details. (line 137)
-* physical page number, and -p: Option details. (line 185)
-* PNG image format: Option details. (line 203)
-* problems: Diagnosing problems. (line 6)
-* quality: Option details. (line 229)
-* quiet operation: Option details. (line 225)
-* reverse pagination: Option details. (line 236)
-* silent operation: Option details. (line 225)
-* standard input, reading options from: Option details. (line 11)
-* standard output, output to: Option details. (line 172)
-* T1lib font rendering: Option details. (line 251)
-* transparent border fallback color: Option details. (line 25)
-* transparent border width: Option details. (line 25)
-* trouble: Diagnosing problems. (line 6)
-* truecolor output: Option details. (line 265)
-* warnings, suppressing: Option details. (line 225)
-
-
-
-Tag Table:
-Node: Top296
-Node: Introduction1115
-Node: Installation3107
-Node: Prerequisites3454
-Node: Configure5337
-Node: Build/install7403
-Node: Installation outside the texmf tree7874
-Node: Advice for non-privileged users8581
-Node: Basic usage9574
-Node: Command-line options10701
-Node: Option summary11136
-Node: Option details13559
-Node: Diagnosing problems27947
-Node: Debug options29059
-Node: Included graphics problems30101
-Node: Color30749
-Node: Color specifications31083
-Node: Color specials32098
-Node: Credits33513
-Node: Copying34542
-Node: Index35369
-
-End Tag Table