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author | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
commit | 30dd9f517c9c093ff3319061647a4555264f7914 (patch) | |
tree | 0d7a349bf99be5a42cc9c5a80a30f3b7136c4ccd /Master/xemtex/gslib/gs_dpnxt.ps | |
parent | 08ab8dce83f53b0f915cb66a37bbc8478b22c307 (diff) |
trunk
git-svn-id: svn://tug.org/texlive/trunk@9 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/xemtex/gslib/gs_dpnxt.ps')
-rw-r--r-- | Master/xemtex/gslib/gs_dpnxt.ps | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/Master/xemtex/gslib/gs_dpnxt.ps b/Master/xemtex/gslib/gs_dpnxt.ps new file mode 100644 index 00000000000..e38e6965074 --- /dev/null +++ b/Master/xemtex/gslib/gs_dpnxt.ps @@ -0,0 +1,113 @@ +% Copyright (C) 1997, 1998 Aladdin Enterprises. All rights reserved. +% +% 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. + +% $Id: gs_dpnxt.ps,v 1.2.6.1.2.1 2003/04/12 14:02:38 giles Exp $ +% gs_dpnxt.ps +% NeXT Display PostScript extensions + +% Define the operation values for compositing. These must match the values +% in gsdpnext.h, which also are the ones from the NeXT documentation. +% We put them in systemdict, which seems like as good a place as any. +mark + /Clear /Copy /Sover /Sin /Sout /Satop /Dover /Din /Dout /Datop /Xor + /PlusD /PlusL /Highlight % not sure about Highlight +counttomark { counttomark 1 sub def } repeat pop + +% We implement readimage and sizeimage using the following 3 otherwise +% undocumented lower-level operators: +% +% <x> <y> <width> <height> <matrix> .sizeimagebox +% <dev_x> <dev_y> <dev_width> <dev_height> <matrix> +% +% - .sizeimageparams <bits/sample> <multiproc> <ncolors> +% +% <device> <x> <y> <width> <max_height> <alpha?> <std_depth|null> +% <string> .getbitsrect <height> <substring> +% +% NOTE: These operators are subject to change without notice! + +% Implement readimage using .getbitsrect. Experimentation on a NeXT system +% shows that the data is always returned in order of increasing device Y, +% regardless of the CTM. +% +% Note that we can't make stack protection work for this operator, +% because it must remove its operands from the stack before calling +% the supplied procedure(s). + +/readimage { % <x> <y> <width> <height> <proc> [... <procN-1>] + % <string> <alpha?> readimage - + .sizeimageparams exch { + % multiproc = true. If N > 1, store the procedures in an array. + exch pop 1 index { 1 add } if + % Stack: ... string alpha? nprocs + dup 1 eq { + pop false % only 1 procedure, multiproc is irrelevant + } { + dup array 4 1 roll 3 add 2 roll astore 3 1 roll true + } ifelse + } { + % multiproc = false. + pop pop false + } ifelse + % Map the rectangle to device coordinates. + % Stack: x y w h proc(s) str alpha? multi? + 8 -4 roll matrix .sizeimagebox pop 8 4 roll + % Make sure we allocate the operand array in local VM + % to avoid a possible invalidaccess. + .currentglobal false .setglobal 9 1 roll + exch { 1 } { 0 } ifelse exch % alpha is last, if present + exch 4 1 roll 8 array astore exch .setglobal + { % Read out a block of scan lines and pass them to the procedure. + % Stack: [x y w h alpha? proc(s) str multi?] -- we must consume this. + dup 3 get 0 eq { pop exit } if + aload 9 1 roll pop exch pop currentdevice 7 1 roll + % Always read out the data as standard (not native) pixels. + .sizeimageparams pop pop exch .getbitsrect + % Stack: [x y w h alpha? proc(s) str multi?] hread substr + 3 -1 roll + % Stack: hread substr [x y w h alpha? proc(s) str multi?] + dup 1 2 copy get 5 index add put + % Stack: hread substr [x y' w h alpha? proc(s) str multi?] + dup 3 2 copy get 6 -1 roll sub put + % Stack: substr [x y' w h' alpha? proc(s) str multi?] + dup 5 get exch 7 get { + % multiproc = true, pass each plane to a different procedure. + % Stack: substr procs + 0 1 2 index length 1 sub { + % Push 1 plane and its procedure under the top 2 elements. + % Stack: ... substr procs plane# + 2 index length 2 index length idiv % bytes per plane + dup 2 index mul exch + % Stack: ... substr procs plane# start length + 4 index 3 1 roll getinterval 4 1 roll + 2 copy get 4 1 roll pop + } for + exch pop length 2 mul .execn + } { + % multiproc = false, just call the procedure. + exec + } ifelse + } //systemdict /exec get 3 packedarray cvx loop +} bind odef + +% Implement sizeimage using lower-level operators. + +/sizeimage { % <x> <y> <width> <height> <matrix> sizeimage + % <devwidth> <devheight> <bits/sample> <matrix> + % <multiproc> <ncolors> + .sizeimagebox 5 -2 roll pop pop + .sizeimageparams 3 -1 roll 4 1 roll +} bind odef |