Bug Summary

File:jdk/src/java.desktop/share/native/liblcms/cmsalpha.c
Warning:line 618, column 45
The right operand of '+' is a garbage value

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name cmsalpha.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/unix/native/libjava -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -D LIBC=gnu -D _GNU_SOURCE -D _REENTRANT -D _LARGEFILE64_SOURCE -D LINUX -D DEBUG -D _LITTLE_ENDIAN -D ARCH="amd64" -D amd64 -D _LP64=1 -D CMS_DONT_USE_FAST_FLOOR -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/liblcms -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/headers/java.desktop -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/common/awt/debug -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/libawt/java2d -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d -D _FORTIFY_SOURCE=2 -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-unused -Wno-format-nonliteral -Wno-type-limits -Wno-misleading-indentation -Wno-undef -Wno-unused-function -Wno-stringop-truncation -std=c99 -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -stack-protector 1 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c /home/daniel/Projects/java/jdk/src/java.desktop/share/native/liblcms/cmsalpha.c
1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25// This file is available under and governed by the GNU General Public
26// License version 2 only, as published by the Free Software Foundation.
27// However, the following notice accompanied the original version of this
28// file:
29//
30//---------------------------------------------------------------------------------
31//
32// Little Color Management System
33// Copyright (c) 1998-2020 Marti Maria Saguer
34//
35// Permission is hereby granted, free of charge, to any person obtaining
36// a copy of this software and associated documentation files (the "Software"),
37// to deal in the Software without restriction, including without limitation
38// the rights to use, copy, modify, merge, publish, distribute, sublicense,
39// and/or sell copies of the Software, and to permit persons to whom the Software
40// is furnished to do so, subject to the following conditions:
41//
42// The above copyright notice and this permission notice shall be included in
43// all copies or substantial portions of the Software.
44//
45// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
46// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
47// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
48// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
49// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
50// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
51// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
52//
53//---------------------------------------------------------------------------------
54//
55
56#include "lcms2_internal.h"
57
58// Alpha copy ------------------------------------------------------------------------------------------------------------------
59
60// This macro return words stored as big endian
61#define CHANGE_ENDIAN(w)(cmsUInt16Number) ((cmsUInt16Number) ((w)<<8)|((w)>>
8)) (cmsUInt16Number) ((cmsUInt16Number) ((w)<<8)|((w)>>8))
62
63
64// Floor to byte, taking care of saturation
65cmsINLINEstatic inline cmsUInt8Number _cmsQuickSaturateByte(cmsFloat64Number d)
66{
67 d += 0.5;
68 if (d <= 0) return 0;
69 if (d >= 255.0) return 255;
70
71 return (cmsUInt8Number) _cmsQuickFloorWord(d);
72}
73
74
75// Return the size in bytes of a given formatter
76static
77cmsUInt32Number trueBytesSize(cmsUInt32Number Format)
78{
79 cmsUInt32Number fmt_bytes = T_BYTES(Format)((Format)&7);
80
81 // For double, the T_BYTES field returns zero
82 if (fmt_bytes == 0)
83 return sizeof(double);
84
85 // Otherwise, it is already correct for all formats
86 return fmt_bytes;
87}
88
89
90// Several format converters
91
92typedef void(*cmsFormatterAlphaFn)(void* dst, const void* src);
93
94
95// From 8
96
97static
98void copy8(void* dst, const void* src)
99{
100 memmove(dst, src, 1);
101}
102
103static
104void from8to16(void* dst, const void* src)
105{
106 cmsUInt8Number n = *(cmsUInt8Number*)src;
107 *(cmsUInt16Number*) dst = (cmsUInt16Number) FROM_8_TO_16(n)(cmsUInt16Number) ((((cmsUInt16Number) (n)) << 8)|(n));
108}
109
110static
111void from8to16SE(void* dst, const void* src)
112{
113 cmsUInt8Number n = *(cmsUInt8Number*)src;
114 *(cmsUInt16Number*)dst = CHANGE_ENDIAN(FROM_8_TO_16(n))(cmsUInt16Number) ((cmsUInt16Number) (((cmsUInt16Number) ((((
cmsUInt16Number) (n)) << 8)|(n)))<<8)|(((cmsUInt16Number
) ((((cmsUInt16Number) (n)) << 8)|(n)))>>8));
115}
116
117static
118void from8toFLT(void* dst, const void* src)
119{
120 *(cmsFloat32Number*)dst = (cmsFloat32Number) (*(cmsUInt8Number*)src) / 255.0f;
121}
122
123static
124void from8toDBL(void* dst, const void* src)
125{
126 *(cmsFloat64Number*)dst = (cmsFloat64Number) (*(cmsUInt8Number*)src) / 255.0;
127}
128
129static
130void from8toHLF(void* dst, const void* src)
131{
132#ifndef CMS_NO_HALF_SUPPORT
133 cmsFloat32Number n = (*(cmsUInt8Number*)src) / 255.0f;
134 *(cmsUInt16Number*)dst = _cmsFloat2Half(n);
135#else
136 cmsUNUSED_PARAMETER(dst)((void)dst);
137 cmsUNUSED_PARAMETER(src)((void)src);
138#endif
139}
140
141// From 16
142
143static
144void from16to8(void* dst, const void* src)
145{
146 cmsUInt16Number n = *(cmsUInt16Number*)src;
147 *(cmsUInt8Number*) dst = FROM_16_TO_8(n)(cmsUInt8Number) ((((cmsUInt32Number)(n) * 65281U + 8388608U)
>> 24) & 0xFFU);
148}
149
150static
151void from16SEto8(void* dst, const void* src)
152{
153 cmsUInt16Number n = *(cmsUInt16Number*)src;
154 *(cmsUInt8Number*)dst = FROM_16_TO_8(CHANGE_ENDIAN(n))(cmsUInt8Number) ((((cmsUInt32Number)((cmsUInt16Number) ((cmsUInt16Number
) ((n)<<8)|((n)>>8))) * 65281U + 8388608U) >>
24) & 0xFFU);
155}
156
157static
158void copy16(void* dst, const void* src)
159{
160 memmove(dst, src, 2);
161}
162
163static
164void from16to16(void* dst, const void* src)
165{
166 cmsUInt16Number n = *(cmsUInt16Number*)src;
167 *(cmsUInt16Number*)dst = CHANGE_ENDIAN(n)(cmsUInt16Number) ((cmsUInt16Number) ((n)<<8)|((n)>>
8));
168}
169
170static
171void from16toFLT(void* dst, const void* src)
172{
173 *(cmsFloat32Number*)dst = (*(cmsUInt16Number*)src) / 65535.0f;
174}
175
176static
177void from16SEtoFLT(void* dst, const void* src)
178{
179 *(cmsFloat32Number*)dst = (CHANGE_ENDIAN(*(cmsUInt16Number*)src)(cmsUInt16Number) ((cmsUInt16Number) ((*(cmsUInt16Number*)src
)<<8)|((*(cmsUInt16Number*)src)>>8))) / 65535.0f;
180}
181
182static
183void from16toDBL(void* dst, const void* src)
184{
185 *(cmsFloat64Number*)dst = (cmsFloat64Number) (*(cmsUInt16Number*)src) / 65535.0;
186}
187
188static
189void from16SEtoDBL(void* dst, const void* src)
190{
191 *(cmsFloat64Number*)dst = (cmsFloat64Number) (CHANGE_ENDIAN(*(cmsUInt16Number*)src)(cmsUInt16Number) ((cmsUInt16Number) ((*(cmsUInt16Number*)src
)<<8)|((*(cmsUInt16Number*)src)>>8))) / 65535.0;
192}
193
194static
195void from16toHLF(void* dst, const void* src)
196{
197#ifndef CMS_NO_HALF_SUPPORT
198 cmsFloat32Number n = (*(cmsUInt16Number*)src) / 65535.0f;
199 *(cmsUInt16Number*)dst = _cmsFloat2Half(n);
200#else
201 cmsUNUSED_PARAMETER(dst)((void)dst);
202 cmsUNUSED_PARAMETER(src)((void)src);
203#endif
204}
205
206static
207void from16SEtoHLF(void* dst, const void* src)
208{
209#ifndef CMS_NO_HALF_SUPPORT
210 cmsFloat32Number n = (CHANGE_ENDIAN(*(cmsUInt16Number*)src)(cmsUInt16Number) ((cmsUInt16Number) ((*(cmsUInt16Number*)src
)<<8)|((*(cmsUInt16Number*)src)>>8))) / 65535.0f;
211 *(cmsUInt16Number*)dst = _cmsFloat2Half(n);
212#else
213 cmsUNUSED_PARAMETER(dst)((void)dst);
214 cmsUNUSED_PARAMETER(src)((void)src);
215#endif
216}
217// From Float
218
219static
220void fromFLTto8(void* dst, const void* src)
221{
222 cmsFloat32Number n = *(cmsFloat32Number*)src;
223 *(cmsUInt8Number*)dst = _cmsQuickSaturateByte(n * 255.0f);
224}
225
226static
227void fromFLTto16(void* dst, const void* src)
228{
229 cmsFloat32Number n = *(cmsFloat32Number*)src;
230 *(cmsUInt16Number*)dst = _cmsQuickSaturateWord(n * 65535.0f);
231}
232
233static
234void fromFLTto16SE(void* dst, const void* src)
235{
236 cmsFloat32Number n = *(cmsFloat32Number*)src;
237 cmsUInt16Number i = _cmsQuickSaturateWord(n * 65535.0f);
238
239 *(cmsUInt16Number*)dst = CHANGE_ENDIAN(i)(cmsUInt16Number) ((cmsUInt16Number) ((i)<<8)|((i)>>
8));
240}
241
242static
243void copy32(void* dst, const void* src)
244{
245 memmove(dst, src, sizeof(cmsFloat32Number));
246}
247
248static
249void fromFLTtoDBL(void* dst, const void* src)
250{
251 cmsFloat32Number n = *(cmsFloat32Number*)src;
252 *(cmsFloat64Number*)dst = (cmsFloat64Number)n;
253}
254
255static
256void fromFLTtoHLF(void* dst, const void* src)
257{
258#ifndef CMS_NO_HALF_SUPPORT
259 cmsFloat32Number n = *(cmsFloat32Number*)src;
260 *(cmsUInt16Number*)dst = _cmsFloat2Half(n);
261#else
262 cmsUNUSED_PARAMETER(dst)((void)dst);
263 cmsUNUSED_PARAMETER(src)((void)src);
264#endif
265}
266
267
268// From HALF
269
270static
271void fromHLFto8(void* dst, const void* src)
272{
273#ifndef CMS_NO_HALF_SUPPORT
274 cmsFloat32Number n = _cmsHalf2Float(*(cmsUInt16Number*)src);
275 *(cmsUInt8Number*)dst = _cmsQuickSaturateByte(n * 255.0f);
276#else
277 cmsUNUSED_PARAMETER(dst)((void)dst);
278 cmsUNUSED_PARAMETER(src)((void)src);
279#endif
280
281}
282
283static
284void fromHLFto16(void* dst, const void* src)
285{
286#ifndef CMS_NO_HALF_SUPPORT
287 cmsFloat32Number n = _cmsHalf2Float(*(cmsUInt16Number*)src);
288 *(cmsUInt16Number*)dst = _cmsQuickSaturateWord(n * 65535.0f);
289#else
290 cmsUNUSED_PARAMETER(dst)((void)dst);
291 cmsUNUSED_PARAMETER(src)((void)src);
292#endif
293}
294
295static
296void fromHLFto16SE(void* dst, const void* src)
297{
298#ifndef CMS_NO_HALF_SUPPORT
299 cmsFloat32Number n = _cmsHalf2Float(*(cmsUInt16Number*)src);
300 cmsUInt16Number i = _cmsQuickSaturateWord(n * 65535.0f);
301 *(cmsUInt16Number*)dst = CHANGE_ENDIAN(i)(cmsUInt16Number) ((cmsUInt16Number) ((i)<<8)|((i)>>
8));
302#else
303 cmsUNUSED_PARAMETER(dst)((void)dst);
304 cmsUNUSED_PARAMETER(src)((void)src);
305#endif
306}
307
308static
309void fromHLFtoFLT(void* dst, const void* src)
310{
311#ifndef CMS_NO_HALF_SUPPORT
312 *(cmsFloat32Number*)dst = _cmsHalf2Float(*(cmsUInt16Number*)src);
313#else
314 cmsUNUSED_PARAMETER(dst)((void)dst);
315 cmsUNUSED_PARAMETER(src)((void)src);
316#endif
317}
318
319static
320void fromHLFtoDBL(void* dst, const void* src)
321{
322#ifndef CMS_NO_HALF_SUPPORT
323 *(cmsFloat64Number*)dst = (cmsFloat64Number)_cmsHalf2Float(*(cmsUInt16Number*)src);
324#else
325 cmsUNUSED_PARAMETER(dst)((void)dst);
326 cmsUNUSED_PARAMETER(src)((void)src);
327#endif
328}
329
330// From double
331static
332void fromDBLto8(void* dst, const void* src)
333{
334 cmsFloat64Number n = *(cmsFloat64Number*)src;
335 *(cmsUInt8Number*)dst = _cmsQuickSaturateByte(n * 255.0);
336}
337
338static
339void fromDBLto16(void* dst, const void* src)
340{
341 cmsFloat64Number n = *(cmsFloat64Number*)src;
342 *(cmsUInt16Number*)dst = _cmsQuickSaturateWord(n * 65535.0f);
343}
344
345static
346void fromDBLto16SE(void* dst, const void* src)
347{
348 cmsFloat64Number n = *(cmsFloat64Number*)src;
349 cmsUInt16Number i = _cmsQuickSaturateWord(n * 65535.0f);
350 *(cmsUInt16Number*)dst = CHANGE_ENDIAN(i)(cmsUInt16Number) ((cmsUInt16Number) ((i)<<8)|((i)>>
8));
351}
352
353static
354void fromDBLtoFLT(void* dst, const void* src)
355{
356 cmsFloat64Number n = *(cmsFloat64Number*)src;
357 *(cmsFloat32Number*)dst = (cmsFloat32Number) n;
358}
359
360static
361void fromDBLtoHLF(void* dst, const void* src)
362{
363#ifndef CMS_NO_HALF_SUPPORT
364 cmsFloat32Number n = (cmsFloat32Number) *(cmsFloat64Number*)src;
365 *(cmsUInt16Number*)dst = _cmsFloat2Half(n);
366#else
367 cmsUNUSED_PARAMETER(dst)((void)dst);
368 cmsUNUSED_PARAMETER(src)((void)src);
369#endif
370}
371
372static
373void copy64(void* dst, const void* src)
374{
375 memmove(dst, src, sizeof(cmsFloat64Number));
376}
377
378
379// Returns the position (x or y) of the formatter in the table of functions
380static
381int FormatterPos(cmsUInt32Number frm)
382{
383 cmsUInt32Number b = T_BYTES(frm)((frm)&7);
384
385 if (b == 0 && T_FLOAT(frm)(((frm)>>22)&1))
386 return 5; // DBL
387#ifndef CMS_NO_HALF_SUPPORT
388 if (b == 2 && T_FLOAT(frm)(((frm)>>22)&1))
389 return 3; // HLF
390#endif
391 if (b == 4 && T_FLOAT(frm)(((frm)>>22)&1))
392 return 4; // FLT
393 if (b == 2 && !T_FLOAT(frm)(((frm)>>22)&1))
394 {
395 if (T_ENDIAN16(frm)(((frm)>>11)&1))
396 return 2; // 16SE
397 else
398 return 1; // 16
399 }
400 if (b == 1 && !T_FLOAT(frm)(((frm)>>22)&1))
401 return 0; // 8
402 return -1; // not recognized
403}
404
405// Obtains an alpha-to-alpha function formatter
406static
407cmsFormatterAlphaFn _cmsGetFormatterAlpha(cmsContext id, cmsUInt32Number in, cmsUInt32Number out)
408{
409static cmsFormatterAlphaFn FormattersAlpha[6][6] = {
410
411 /* from 8 */ { copy8, from8to16, from8to16SE, from8toHLF, from8toFLT, from8toDBL },
412 /* from 16*/ { from16to8, copy16, from16to16, from16toHLF, from16toFLT, from16toDBL },
413 /* from 16SE*/{ from16SEto8, from16to16, copy16, from16SEtoHLF,from16SEtoFLT, from16SEtoDBL },
414 /* from HLF*/ { fromHLFto8, fromHLFto16, fromHLFto16SE, copy16, fromHLFtoFLT, fromHLFtoDBL },
415 /* from FLT*/ { fromFLTto8, fromFLTto16, fromFLTto16SE, fromFLTtoHLF, copy32, fromFLTtoDBL },
416 /* from DBL*/ { fromDBLto8, fromDBLto16, fromDBLto16SE, fromDBLtoHLF, fromDBLtoFLT, copy64 }};
417
418 int in_n = FormatterPos(in);
419 int out_n = FormatterPos(out);
420
421 if (in_n < 0 || out_n < 0 || in_n > 5 || out_n > 5) {
422
423 cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION8, "Unrecognized alpha channel width");
424 return NULL((void*)0);
425 }
426
427 return FormattersAlpha[in_n][out_n];
428}
429
430
431
432// This function computes the distance from each component to the next one in bytes.
433static
434void ComputeIncrementsForChunky(cmsUInt32Number Format,
435 cmsUInt32Number ComponentStartingOrder[],
436 cmsUInt32Number ComponentPointerIncrements[])
437{
438 cmsUInt32Number channels[cmsMAXCHANNELS16];
439 cmsUInt32Number extra = T_EXTRA(Format)(((Format)>>7)&7);
440 cmsUInt32Number nchannels = T_CHANNELS(Format)(((Format)>>3)&15);
441 cmsUInt32Number total_chans = nchannels + extra;
442 cmsUInt32Number i;
443 cmsUInt32Number channelSize = trueBytesSize(Format);
444 cmsUInt32Number pixelSize = channelSize * total_chans;
445
446 // Sanity check
447 if (total_chans <= 0 || total_chans >= cmsMAXCHANNELS16)
448 return;
449
450 memset(channels, 0, sizeof(channels));
451
452 // Separation is independent of starting point and only depends on channel size
453 for (i = 0; i < extra; i++)
454 ComponentPointerIncrements[i] = pixelSize;
455
456 // Handle do swap
457 for (i = 0; i < total_chans; i++)
458 {
459 if (T_DOSWAP(Format)(((Format)>>10)&1)) {
460 channels[i] = total_chans - i - 1;
461 }
462 else {
463 channels[i] = i;
464 }
465 }
466
467 // Handle swap first (ROL of positions), example CMYK -> KCMY | 0123 -> 3012
468 if (T_SWAPFIRST(Format)(((Format)>>14)&1) && total_chans > 1) {
469
470 cmsUInt32Number tmp = channels[0];
471 for (i = 0; i < total_chans-1; i++)
472 channels[i] = channels[i + 1];
473
474 channels[total_chans - 1] = tmp;
475 }
476
477 // Handle size
478 if (channelSize > 1)
479 for (i = 0; i < total_chans; i++) {
480 channels[i] *= channelSize;
481 }
482
483 for (i = 0; i < extra; i++)
484 ComponentStartingOrder[i] = channels[i + nchannels];
485}
486
487
488
489// On planar configurations, the distance is the stride added to any non-negative
490static
491void ComputeIncrementsForPlanar(cmsUInt32Number Format,
492 cmsUInt32Number BytesPerPlane,
493 cmsUInt32Number ComponentStartingOrder[],
494 cmsUInt32Number ComponentPointerIncrements[])
495{
496 cmsUInt32Number channels[cmsMAXCHANNELS16];
497 cmsUInt32Number extra = T_EXTRA(Format)(((Format)>>7)&7);
498 cmsUInt32Number nchannels = T_CHANNELS(Format)(((Format)>>3)&15);
499 cmsUInt32Number total_chans = nchannels + extra;
500 cmsUInt32Number i;
501 cmsUInt32Number channelSize = trueBytesSize(Format);
502
503 // Sanity check
504 if (total_chans <= 0 || total_chans >= cmsMAXCHANNELS16)
12
←
Assuming 'total_chans' is <= 0
→
505 return;
506
507 memset(channels, 0, sizeof(channels));
508
509 // Separation is independent of starting point and only depends on channel size
510 for (i = 0; i < extra; i++)
511 ComponentPointerIncrements[i] = channelSize;
512
513 // Handle do swap
514 for (i = 0; i < total_chans; i++)
515 {
516 if (T_DOSWAP(Format)(((Format)>>10)&1)) {
517 channels[i] = total_chans - i - 1;
518 }
519 else {
520 channels[i] = i;
521 }
522 }
523
524 // Handle swap first (ROL of positions), example CMYK -> KCMY | 0123 -> 3012
525 if (T_SWAPFIRST(Format)(((Format)>>14)&1) && total_chans > 0) {
526
527 cmsUInt32Number tmp = channels[0];
528 for (i = 0; i < total_chans - 1; i++)
529 channels[i] = channels[i + 1];
530
531 channels[total_chans - 1] = tmp;
532 }
533
534 // Handle size
535 for (i = 0; i < total_chans; i++) {
536 channels[i] *= BytesPerPlane;
537 }
538
539 for (i = 0; i < extra; i++)
540 ComponentStartingOrder[i] = channels[i + nchannels];
541}
542
543
544
545// Dispatcher por chunky and planar RGB
546static
547void ComputeComponentIncrements(cmsUInt32Number Format,
548 cmsUInt32Number BytesPerPlane,
549 cmsUInt32Number ComponentStartingOrder[],
550 cmsUInt32Number ComponentPointerIncrements[])
551{
552 if (T_PLANAR(Format)(((Format)>>12)&1)) {
9
←
Assuming the condition is true
→
10
←
Taking true branch
→
553
554 ComputeIncrementsForPlanar(Format, BytesPerPlane, ComponentStartingOrder, ComponentPointerIncrements);
11
←
Calling 'ComputeIncrementsForPlanar'
→
13
←
Returning from 'ComputeIncrementsForPlanar'
→
555 }
556 else {
557 ComputeIncrementsForChunky(Format, ComponentStartingOrder, ComponentPointerIncrements);
558 }
559
560}
561
562
563
564// Handles extra channels copying alpha if requested by the flags
565void _cmsHandleExtraChannels(_cmsTRANSFORM* p, const void* in,
566 void* out,
567 cmsUInt32Number PixelsPerLine,
568 cmsUInt32Number LineCount,
569 const cmsStride* Stride)
570{
571 cmsUInt32Number i, j, k;
572 cmsUInt32Number nExtra;
573 cmsUInt32Number SourceStartingOrder[cmsMAXCHANNELS16];
574 cmsUInt32Number SourceIncrements[cmsMAXCHANNELS16];
575 cmsUInt32Number DestStartingOrder[cmsMAXCHANNELS16];
576 cmsUInt32Number DestIncrements[cmsMAXCHANNELS16];
577
578 cmsFormatterAlphaFn copyValueFn;
579
580 // Make sure we need some copy
581 if (!(p->dwOriginalFlags & cmsFLAGS_COPY_ALPHA0x04000000))
1
Assuming the condition is false
→
2
←
Taking false branch
→
582 return;
583
584 // Exit early if in-place color-management is occurring - no need to copy extra channels to themselves.
585 if (p->InputFormat == p->OutputFormat && in == out)
3
←
Assuming field 'InputFormat' is not equal to field 'OutputFormat'
→
586 return;
587
588 // Make sure we have same number of alpha channels. If not, just return as this should be checked at transform creation time.
589 nExtra = T_EXTRA(p->InputFormat)(((p->InputFormat)>>7)&7);
590 if (nExtra != T_EXTRA(p->OutputFormat)(((p->OutputFormat)>>7)&7))
4
←
Assuming the condition is false
→
5
←
Taking false branch
→
591 return;
592
593 // Anything to do?
594 if (nExtra == 0)
6
←
Assuming 'nExtra' is not equal to 0
→
7
←
Taking false branch
→
595 return;
596
597 // Compute the increments
598 ComputeComponentIncrements(p->InputFormat, Stride->BytesPerPlaneIn, SourceStartingOrder, SourceIncrements);
8
←
Calling 'ComputeComponentIncrements'
→
14
←
Returning from 'ComputeComponentIncrements'
→
599 ComputeComponentIncrements(p->OutputFormat, Stride->BytesPerPlaneOut, DestStartingOrder, DestIncrements);
600
601 // Check for conversions 8, 16, half, float, dbl
602 copyValueFn = _cmsGetFormatterAlpha(p->ContextID, p->InputFormat, p->OutputFormat);
603 if (copyValueFn == NULL((void*)0))
15
←
Assuming 'copyValueFn' is not equal to NULL
→
16
←
Taking false branch
→
604 return;
605
606 if (nExtra == 1) { // Optimized routine for copying a single extra channel quickly
17
←
Assuming 'nExtra' is equal to 1
→
18
←
Taking true branch
→
607
608 cmsUInt8Number* SourcePtr;
609 cmsUInt8Number* DestPtr;
610
611 cmsUInt32Number SourceStrideIncrement = 0;
612 cmsUInt32Number DestStrideIncrement = 0;
613
614 // The loop itself
615 for (i = 0; i < LineCount; i++) {
19
←
Assuming 'i' is < 'LineCount'
→
20
←
Loop condition is true. Entering loop body
→
616
617 // Prepare pointers for the loop
618 SourcePtr = (cmsUInt8Number*)in + SourceStartingOrder[0] + SourceStrideIncrement;
21
←
The right operand of '+' is a garbage value
619 DestPtr = (cmsUInt8Number*)out + DestStartingOrder[0] + DestStrideIncrement;
620
621 for (j = 0; j < PixelsPerLine; j++) {
622
623 copyValueFn(DestPtr, SourcePtr);
624
625 SourcePtr += SourceIncrements[0];
626 DestPtr += DestIncrements[0];
627 }
628
629 SourceStrideIncrement += Stride->BytesPerLineIn;
630 DestStrideIncrement += Stride->BytesPerLineOut;
631 }
632
633 }
634 else { // General case with more than one extra channel
635
636 cmsUInt8Number* SourcePtr[cmsMAXCHANNELS16];
637 cmsUInt8Number* DestPtr[cmsMAXCHANNELS16];
638
639 cmsUInt32Number SourceStrideIncrements[cmsMAXCHANNELS16];
640 cmsUInt32Number DestStrideIncrements[cmsMAXCHANNELS16];
641
642 memset(SourceStrideIncrements, 0, sizeof(SourceStrideIncrements));
643 memset(DestStrideIncrements, 0, sizeof(DestStrideIncrements));
644
645 // The loop itself
646 for (i = 0; i < LineCount; i++) {
647
648 // Prepare pointers for the loop
649 for (j = 0; j < nExtra; j++) {
650
651 SourcePtr[j] = (cmsUInt8Number*)in + SourceStartingOrder[j] + SourceStrideIncrements[j];
652 DestPtr[j] = (cmsUInt8Number*)out + DestStartingOrder[j] + DestStrideIncrements[j];
653 }
654
655 for (j = 0; j < PixelsPerLine; j++) {
656
657 for (k = 0; k < nExtra; k++) {
658
659 copyValueFn(DestPtr[k], SourcePtr[k]);
660
661 SourcePtr[k] += SourceIncrements[k];
662 DestPtr[k] += DestIncrements[k];
663 }
664 }
665
666 for (j = 0; j < nExtra; j++) {
667
668 SourceStrideIncrements[j] += Stride->BytesPerLineIn;
669 DestStrideIncrements[j] += Stride->BytesPerLineOut;
670 }
671 }
672 }
673}
674
675