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Diffstat (limited to 'Master/tlpkg/tlgs/lib/viewjpeg.ps')
| -rw-r--r-- | Master/tlpkg/tlgs/lib/viewjpeg.ps | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/Master/tlpkg/tlgs/lib/viewjpeg.ps b/Master/tlpkg/tlgs/lib/viewjpeg.ps deleted file mode 100644 index 10282a8fe44..00000000000 --- a/Master/tlpkg/tlgs/lib/viewjpeg.ps +++ /dev/null @@ -1,159 +0,0 @@ -%! viewjpeg.ps Copyright (C) 1994 Thomas Merz <tm@pdflib.com>
-%
-% 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.
-%
-% For more information about licensing, please refer to
-% http://www.ghostscript.com/licensing/. For information on
-% commercial licensing, go to http://www.artifex.com/licensing/ or
-% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
-% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
-
-% $Id: viewjpeg.ps 6300 2005-12-28 19:56:24Z giles $
-% View JPEG files with Ghostscript
-%
-% This PostScript code relies on level 2 features.
-%
-% Only JPEG baseline, extended sequential, and progressive files
-% are supported. Note that Adobe PostScript level 2 does not include
-% progressive-JPEG support. Ghostscript with IJG JPEG v6 or later
-% will decode progressive JPEG, but only if you edit gsjmorec.h to
-% enable that feature.
-%
-% Author's address:
-% ------------------------------+
-% {(pstack exec quit) = flush } | Thomas Merz, Munich
-% pstack exec quit | voice +49/89/29160728
-% ------------------------------+ tm@muc.de http://www.muc.de/~tm/
-%
-% $Id: viewjpeg.ps 6300 2005-12-28 19:56:24Z giles $
-% Updated by L. Peter Deutsch 20-May-1997:
-% move the usage example to the beginning
-% Updates by Tom Lane 6-Sep-1995
-
-% Usage example:
-% (jpeg-6/testimg.jpg) viewJPEG
-
-/languagelevel where {pop languagelevel 2 lt}{true} ifelse {
- (JPEG needs PostScript Level 2!\n) print flush stop
-} if
-
-/JPEGdict 20 dict def
-JPEGdict begin
-
-/NoParamMarkers [ % JPEG markers without additional parameters
- 16#D0 16#D1 16#D2 16#D3 16#D4 16#D5 16#D6 16#D7 16#D8 16#01
-] def
-
-/NotSupportedMarkers [ % JPEG markers not supported by PostScript level 2
- 16#C3 16#C5 16#C6 16#C7 16#C8 16#C9 16#CA 16#CB 16#CD 16#CE 16#CF
-] def
-
-% Names of color spaces
-/ColorSpaceNames << /1 /DeviceGray /3 /DeviceRGB /4 /DeviceCMYK >> def
-
-% read one byte from file F
-% - ==> int --or-- stop context
-/NextByte {
- F read not { (Read error in ViewJPEG!\n) print flush stop } if
-} bind def
-
-/SkipSegment { % read two bytes and skip that much data
- NextByte 8 bitshift NextByte add 2 sub { NextByte pop } repeat
-} bind def
-
-% read width, height, and # of components from JPEG markers
-% and store in dict
-/readJPEGmarkers { % - ==> dict --or-- stop context
- 5 dict begin
-
- { % loop: read JPEG marker segments until we find SOFn marker or EOF
- NextByte
- 16#FF eq { % found marker
- /markertype NextByte def
- % Is it S0F0=baseline, SOF1=extended sequential, SOF2=progressive ?
- markertype dup 16#C0 ge exch 16#C2 le and {
- NextByte pop NextByte pop % segment length
- % Ghostscript and Adobe PS accept only data precision 8
- NextByte 8 ne {
- (Error: not 8 bits per component!\n) print flush stop
- } if
-
- % Read crucial image parameters
- /height NextByte 8 bitshift NextByte add def
- /width NextByte 8 bitshift NextByte add def
- /colors NextByte def
-
- VJPGDEBUG { currentdict { exch == == } forall flush } if
- exit
- } if
-
- % detect several segment types which are not compatible with PS
- NotSupportedMarkers {
- markertype eq {
- (Marker ) print markertype ==
- (not supported!\n) print flush stop
- } if
- } forall
-
- % Skip segment if marker has parameters associated with it
- true NoParamMarkers { markertype eq {pop false exit} if } forall
- { SkipSegment } if
- } if
- } loop
-
- currentdict dup /markertype undef
- end
-} bind def
-
-end % JPEGdict
-
-% read image parameters from JPEG file and display the image
-/viewJPEG { % <file|string> ==> -
- save
- JPEGdict begin
- /saved exch def
- /scratch 1 string def
- dup type /stringtype eq { (r) file } if
- /F exch def
-
- readJPEGmarkers begin
- F 0 setfileposition % reset file pointer
-
- % We use the whole clipping area for the image (at least in one dimension)
- gsave clippath pathbbox grestore
- /ury exch def /urx exch def
- /lly exch def /llx exch def
-
- llx lly translate
- width height scale
-
- % use whole width or height, whichever is appropriate
- urx llx sub width div ury lly sub height div
- 2 copy gt { exch } if pop % min
- dup scale
- ColorSpaceNames colors scratch cvs get setcolorspace
-
- % prepare image dictionary
- << /ImageType 1
- /Width width
- /Height height
- /ImageMatrix [ width 0 0 height neg 0 height ]
- /BitsPerComponent 8
- % If 4-component (CMYK), assume data is inverted per Adobe Photoshop
- colors 4 eq {
- /Decode [ colors { 1 0 } repeat ]
- } {
- /Decode [ colors { 0 1 } repeat ]
- } ifelse
- /DataSource F /DCTDecode filter
- >> image
-
- end % image parameter dictionary
-
- saved end restore
-} bind def
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