blob: 1b5dc7d5875117e46c51a27784620b01a9da0527 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
% Copyright (C) 1995 Aladdin Enterprises. All rights reserved.
%
% 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.
% $Id$
% docie.ps
% Emulate CIE algorithms in PostScript.
% ---------------- Auxiliary procedures ---------------- %
/r1default [0 1] def
/r3default [0 1 0 1 0 1] def
/apply3 % <u> <v> <w> [<pu> <pv> <pw>] apply3 <u'> <v'> <w'>
{ { 4 -1 roll exch exec } forall
} bind def
/restrict % <u> <min> <max> restrict <u'>
{ 3 1 roll .max .min
} bind def
/restrict3 % <u> <v> <w> [<minu> ... <maxw>] restrict3 <u'> <v'> <w'>
{ aload pop
7 -1 roll 3 1 roll restrict 7 1 roll
5 -1 roll 3 1 roll restrict 5 1 roll
restrict 3 1 roll
} bind def
/rescale % <u> <min> <max> rescale <u'>
{ 1 index sub 3 1 roll sub exch div 0 .max 1 .min
} bind def
/rescale3 % <u> <v> <w> [<minu> ... <maxw>] rescale3 <u'> <v'> <w'>
{ aload pop
7 -1 roll 3 1 roll rescale 7 1 roll
5 -1 roll 3 1 roll rescale 5 1 roll
rescale 3 1 roll
} bind def
/mmult3 % <u> <v> <w> [<uu> <uv> ... <wv> <ww>] mmult3
% <u'> <v'> <w'>
{ 4 -1 roll dup dup 6 -1 roll dup dup 8 -1 roll dup dup
10 -1 roll { 10 -1 roll mul } forall
% Stack: u1 v1 w1 u2 v2 w2 u3 v3 w3
4 -1 roll add 6 -1 roll add
% Stack: u1 v1 u2 v2 u3 v3 w'
7 1 roll 3 -1 roll add 4 -1 roll add
% Stack: w' u1 u2 u3 v'
5 1 roll add add 3 1 roll
} bind def
/minvert3 % [<uu> <uv> ... <wv> <ww>] minvert3
% [<uu'> <uv'> ... <wv'> <ww'>]
{ 16 dict begin
aload pop { I H G F E D C B A } { exch def } forall
/coa E I mul F H mul sub def
/cob F G mul D I mul sub def
/coc D H mul E G mul sub def
/det A coa mul B cob mul add C coc mul add def
[ coa det div
C H mul B I mul sub det div
B F mul C E mul sub det div
cob det div
A I mul C G mul sub det div
C D mul A F mul sub det div
coc det div
B G mul A H mul sub det div
A E mul B D mul sub det div
]
end
} bind def
/print1
{ print dup ==
} bind def
/print3
{ print 3 array astore dup == aload pop
} bind def
% ---------------- Mapping to XYZ ---------------- %
/csmap % <csdict> <l> <m> <n> csmap <csdict> <x> <y> <z>
{ 3 index /RangeLMN .knownget not { r3default } if restrict3
DOCIEDEBUG { (After RangeLMN Decode: ) print3 } if
3 index /DecodeLMN .knownget { apply3 } if
DOCIEDEBUG { (After DecodeLMN Decode: ) print3 } if
3 index /MatrixLMN .knownget { mmult3 } if
DOCIEDEBUG { (After MatrixLMN Decode: ) print3 } if
} bind def
/csciea % <csdict> <a> csciea <csdict> <x> <y> <z>
{ 1 index /RangeA .knownget not { r1default aload pop } if restrict
DOCIEDEBUG { (After RangeA Decode: ) print1 } if
1 index /DecodeA .knownget { exec } if
DOCIEDEBUG { (After DecodeA Decode: ) print1 } if
1 index /MatrixA .knownget
{ { 1 index mul exch } forall pop }
{ dup dup }
ifelse
DOCIEDEBUG { (After MatrixA Decode: ) print3 } if
csmap
} bind def
/cscieabc % <csdict> <a> <b> <c> cscieabc <csdict> <x> <y> <z>
{ 3 index /RangeABC .knownget not { r3default } if restrict3
DOCIEDEBUG { (After RangeABC Decode: ) print3 } if
3 index /DecodeABC .knownget { apply3 } if
DOCIEDEBUG { (After DecodeABC Decode: ) print3 } if
3 index /MatrixABC .knownget { mmult3 } if
DOCIEDEBUG { (After MatrixABC Decode: ) print3 } if
csmap
} bind def
% ---------------- Rendering from XYZ ---------------- %
/lookup3 % <rtable> <a[0..1]> <b[0..1]> <c[0..1]> lookup3
% <rtable> <bytes>
{ 3 -1 roll 3 index 0 get 1 sub mul
3 -1 roll 3 index 1 get 1 sub mul
3 -1 roll 3 index 2 get 1 sub mul
% Stack: rtable ia ib ic
DOCIEDEBUG { (RenderTable indices: ) print3 mark 5 1 roll } if
3 -1 roll round cvi 3 index 3 get exch get
% Stack: rtable ib ic string
3 -1 roll round cvi 3 index 2 get mul
% Stack: rtable ic string ib*nc
3 -1 roll round cvi add 2 index 4 get mul
% Stack: rtable string index
2 index 4 get getinterval
% Stack: rtable bytes
DOCIEDEBUG { (RenderTable values: ) print (<) print (%stdout) (w) file 1 index writehexstring (>) = } if
} bind def
/bpdefault [0 0 0] def
/crmap % <csdict> <crdict> <x> <y> <z> crmap <v1> ...
{
DOCIEDEBUG { (CIE XYZ = ) print3 } if
3 index /MatrixPQR .knownget { mmult3 } if
DOCIEDEBUG { (After MatrixPQR: ) print3 } if
4 index /WhitePoint get
5 index /BlackPoint .knownget not { bpdefault } if
5 index /WhitePoint get
6 index /BlackPoint .knownget not { bpdefault } if
4
{ 4 -1 roll aload pop
% Stack: csdict crdict x y z pt pt pt px py pz
3 copy 12 index /MatrixPQR .knownget { mmult3 } if 6 array astore
}
repeat
% Stack: csdict crdict x y z wps+ bps+ wpd+ bpd+
9 -1 roll pop % get rid of csdict
7 4 roll
7 index /TransformPQR get
{ % Stack: crdict wps+ bps+ wpd+ bpd+ u v w proc
8 copy exch pop exch pop
exec exch pop 4 -1 roll pop
}
forall
7 3 roll pop pop pop pop % get rid of White/BlackPoints
DOCIEDEBUG { (After TransformPQR: ) print3 } if
3 index /MatrixPQR .knownget { minvert3 mmult3 } if
DOCIEDEBUG { (After MatrixPQR': ) print3 } if
3 index /MatrixLMN .knownget { mmult3 } if
DOCIEDEBUG { (After MatrixLMN Encode: ) print3 } if
3 index /EncodeLMN .knownget { apply3 } if
DOCIEDEBUG { (After EncodeLMN Encode: ) print3 } if
3 index /RangeLMN .knownget not { r3default } if restrict3
DOCIEDEBUG { (After RangeLMN Encode: ) print3 } if
3 index /MatrixABC .knownget { mmult3 } if
DOCIEDEBUG { (After MatrixABC Encode: ) print3 } if
3 index /EncodeABC .knownget { apply3 } if
DOCIEDEBUG { (After EncodeABC Encode: ) print3 } if
3 index /RangeABC .knownget not { r3default } if
5 -1 roll /RenderTable .knownget
{ % Stack: u v w ranges rtable
5 1 roll rescale3
DOCIEDEBUG { (Rescaled ABC: ) print3 } if
% Stack: rtable a b c
lookup3
% Stack: rtable bytes
0 1 3 index 4 get 1 sub
{ % Stack: values rtable bytes c
2 copy get 255 div
% Stack: values rtable bytes c v
3 index 3 -1 roll 5 add get exec 3 1 roll
}
for pop pop
DOCIEDEBUG { (After RenderTableT: ) print ] dup == aload pop } if
}
{ restrict3
DOCIEDEBUG { (After RangeABC Encode: ) print3 } if
}
ifelse
} bind def
% ---------------- Top level control ---------------- %
/mapdict mark
/CIEBasedA { 1 get exch csciea currentcolorrendering 4 1 roll crmap } bind
/DeviceGray { pop /DefaultGray /ColorSpace findresource 1 get exch csciea currentcolorrendering 4 1 roll crmap } bind
/CIEBasedABC { 1 get 4 1 roll cscieabc currentcolorrendering 4 1 roll crmap } bind
/DeviceRGB { pop /DefaultRGB /ColorSpace findresource 1 get 4 1 roll cscieabc currentcolorrendering 4 1 roll crmap } bind
.dicttomark def
/mapcie % <a> mapcie <v1> ...
% <a> <b> <c> mapcie <v1> ...
{ currentcolorspace dup 0 get //mapdict exch get exec
} bind def
|
