1 /* vim: set ts=8 sw=8 noexpandtab: */
3 // Copyright (C) 2009 Mozilla Foundation
4 // Copyright (C) 1998-2007 Marti Maria
6 // Permission is hereby granted, free of charge, to any person obtaining
7 // a copy of this software and associated documentation files (the "Software"),
8 // to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 // and/or sell copies of the Software, and to permit persons to whom the Software
11 // is furnished to do so, subject to the following conditions:
13 // The above copyright notice and this permission notice shall be included in
14 // all copies or substantial portions of the Software.
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #include <string.h> //memset
30 /* It might be worth having a unified limit on content controlled
31 * allocation per profile. This would remove the need for many
32 * of the arbitrary limits that we used */
34 typedef uint32_t be32;
35 typedef uint16_t be16;
39 /* __builtin_bswap isn't available in older gccs
40 * so open code it for now */
41 static be32 cpu_to_be32(int32_t v)
43 #ifdef IS_LITTLE_ENDIAN
44 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | ((v & 0xff000000) >> 24);
45 //return __builtin_bswap32(v);
51 static uint32_t be32_to_cpu(be32 v)
53 #ifdef IS_LITTLE_ENDIAN
54 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | ((v & 0xff000000) >> 24);
55 //return __builtin_bswap32(v);
61 static uint16_t be16_to_cpu(be16 v)
63 #ifdef IS_LITTLE_ENDIAN
64 return ((v & 0xff) << 8) | ((v & 0xff00) >> 8);
70 /* a wrapper around the memory that we are going to parse
71 * into a qcms_profile */
74 const unsigned char *buf;
77 const char *invalid_reason;
80 static void invalid_source(struct mem_source *mem, const char *reason)
83 mem->invalid_reason = reason;
86 static uint32_t read_u32(struct mem_source *mem, size_t offset)
88 /* Subtract from mem->size instead of the more intuitive adding to offset.
89 * This avoids overflowing offset. The subtraction is safe because
90 * mem->size is guaranteed to be > 4 */
91 if (offset > mem->size - 4) {
92 invalid_source(mem, "Invalid offset");
96 memcpy(&k, mem->buf + offset, sizeof(k));
97 return be32_to_cpu(k);
101 static uint16_t read_u16(struct mem_source *mem, size_t offset)
103 if (offset > mem->size - 2) {
104 invalid_source(mem, "Invalid offset");
108 memcpy(&k, mem->buf + offset, sizeof(k));
109 return be16_to_cpu(k);
113 static uint8_t read_u8(struct mem_source *mem, size_t offset)
115 if (offset > mem->size - 1) {
116 invalid_source(mem, "Invalid offset");
119 return *(uint8_t*)(mem->buf + offset);
123 static s15Fixed16Number read_s15Fixed16Number(struct mem_source *mem, size_t offset)
125 return read_u32(mem, offset);
128 static uInt8Number read_uInt8Number(struct mem_source *mem, size_t offset)
130 return read_u8(mem, offset);
133 static uInt16Number read_uInt16Number(struct mem_source *mem, size_t offset)
135 return read_u16(mem, offset);
138 #define BAD_VALUE_PROFILE NULL
139 #define INVALID_PROFILE NULL
140 #define NO_MEM_PROFILE NULL
142 /* An arbitrary 4MB limit on profile size */
143 #define MAX_PROFILE_SIZE 1024*1024*4
144 #define MAX_TAG_COUNT 1024
146 static void check_CMM_type_signature(struct mem_source *src)
148 //uint32_t CMM_type_signature = read_u32(src, 4);
149 //TODO: do the check?
153 static void check_profile_version(struct mem_source *src)
157 uint8_t major_revision = read_u8(src, 8 + 0);
158 uint8_t minor_revision = read_u8(src, 8 + 1);
160 uint8_t reserved1 = read_u8(src, 8 + 2);
161 uint8_t reserved2 = read_u8(src, 8 + 3);
162 /* Checking the version doesn't buy us anything
163 if (major_revision != 0x4) {
164 if (major_revision > 0x2)
165 invalid_source(src, "Unsupported major revision");
166 if (minor_revision > 0x40)
167 invalid_source(src, "Unsupported minor revision");
170 if (reserved1 != 0 || reserved2 != 0)
171 invalid_source(src, "Invalid reserved bytes");
174 #define INPUT_DEVICE_PROFILE 0x73636e72 // 'scnr'
175 #define DISPLAY_DEVICE_PROFILE 0x6d6e7472 // 'mntr'
176 #define OUTPUT_DEVICE_PROFILE 0x70727472 // 'prtr'
177 #define DEVICE_LINK_PROFILE 0x6c696e6b // 'link'
178 #define COLOR_SPACE_PROFILE 0x73706163 // 'spac'
179 #define ABSTRACT_PROFILE 0x61627374 // 'abst'
180 #define NAMED_COLOR_PROFILE 0x6e6d636c // 'nmcl'
182 static void read_class_signature(qcms_profile *profile, struct mem_source *mem)
184 profile->class = read_u32(mem, 12);
185 switch (profile->class) {
186 case DISPLAY_DEVICE_PROFILE:
187 case INPUT_DEVICE_PROFILE:
188 case OUTPUT_DEVICE_PROFILE:
189 case COLOR_SPACE_PROFILE:
192 invalid_source(mem, "Invalid Profile/Device Class signature");
196 static void read_color_space(qcms_profile *profile, struct mem_source *mem)
198 profile->color_space = read_u32(mem, 16);
199 switch (profile->color_space) {
204 invalid_source(mem, "Unsupported colorspace");
208 static void read_pcs(qcms_profile *profile, struct mem_source *mem)
210 profile->pcs = read_u32(mem, 20);
211 switch (profile->pcs) {
216 invalid_source(mem, "Unsupported pcs");
232 static struct tag_index read_tag_table(qcms_profile *profile, struct mem_source *mem)
234 struct tag_index index = {0, NULL};
237 index.count = read_u32(mem, 128);
238 if (index.count > MAX_TAG_COUNT) {
239 invalid_source(mem, "max number of tags exceeded");
243 index.tags = malloc(sizeof(struct tag)*index.count);
245 for (i = 0; i < index.count; i++) {
246 index.tags[i].signature = read_u32(mem, 128 + 4 + 4*i*3);
247 index.tags[i].offset = read_u32(mem, 128 + 4 + 4*i*3 + 4);
248 index.tags[i].size = read_u32(mem, 128 + 4 + 4*i*3 + 8);
255 // Checks a profile for obvious inconsistencies and returns
256 // true if the profile looks bogus and should probably be
258 qcms_bool qcms_profile_is_bogus(qcms_profile *profile)
260 float sum[3], target[3], tolerance[3];
261 float rX, rY, rZ, gX, gY, gZ, bX, bY, bZ;
265 // We currently only check the bogosity of RGB profiles
266 if (profile->color_space != RGB_SIGNATURE)
269 if (qcms_supports_iccv4 && (profile->A2B0 || profile->B2A0))
272 rX = s15Fixed16Number_to_float(profile->redColorant.X);
273 rY = s15Fixed16Number_to_float(profile->redColorant.Y);
274 rZ = s15Fixed16Number_to_float(profile->redColorant.Z);
276 gX = s15Fixed16Number_to_float(profile->greenColorant.X);
277 gY = s15Fixed16Number_to_float(profile->greenColorant.Y);
278 gZ = s15Fixed16Number_to_float(profile->greenColorant.Z);
280 bX = s15Fixed16Number_to_float(profile->blueColorant.X);
281 bY = s15Fixed16Number_to_float(profile->blueColorant.Y);
282 bZ = s15Fixed16Number_to_float(profile->blueColorant.Z);
284 // Check if any of the XYZ values are negative (see mozilla bug 498245)
285 // CIEXYZ tristimulus values cannot be negative according to the spec.
287 (rX < 0) || (rY < 0) || (rZ < 0) ||
288 (gX < 0) || (gY < 0) || (gZ < 0) ||
289 (bX < 0) || (bY < 0) || (bZ < 0);
295 // Sum the values; they should add up to something close to white
296 sum[0] = rX + gX + bX;
297 sum[1] = rY + gY + bY;
298 sum[2] = rZ + gZ + bZ;
300 #if defined (_MSC_VER)
301 #pragma warning(push)
302 /* Disable double to float truncation warning 4305 */
303 #pragma warning(disable:4305)
305 // Build our target vector (see mozilla bug 460629)
310 // Our tolerance vector - Recommended by Chris Murphy based on
311 // conversion from the LAB space criterion of no more than 3 in any one
312 // channel. This is similar to, but slightly more tolerant than Adobe's
318 #if defined (_MSC_VER)
319 /* Restore warnings */
322 // Compare with our tolerance
323 for (i = 0; i < 3; ++i) {
324 if (!(((sum[i] - tolerance[i]) <= target[i]) &&
325 ((sum[i] + tolerance[i]) >= target[i])))
333 #define TAG_bXYZ 0x6258595a
334 #define TAG_gXYZ 0x6758595a
335 #define TAG_rXYZ 0x7258595a
336 #define TAG_rTRC 0x72545243
337 #define TAG_bTRC 0x62545243
338 #define TAG_gTRC 0x67545243
339 #define TAG_kTRC 0x6b545243
340 #define TAG_A2B0 0x41324230
341 #define TAG_B2A0 0x42324130
342 #define TAG_CHAD 0x63686164
343 #define TAG_desc 0x64657363
345 static struct tag *find_tag(struct tag_index index, uint32_t tag_id)
348 struct tag *tag = NULL;
349 for (i = 0; i < index.count; i++) {
350 if (index.tags[i].signature == tag_id) {
351 return &index.tags[i];
357 #define DESC_TYPE 0x64657363 // 'desc'
358 #define MLUC_TYPE 0x6d6c7563 // 'mluc'
360 static bool read_tag_descType(qcms_profile *profile, struct mem_source *src, struct tag_index index, uint32_t tag_id)
362 struct tag *tag = find_tag(index, tag_id);
364 const uint32_t limit = sizeof profile->description;
365 uint32_t offset = tag->offset;
366 uint32_t type = read_u32(src, offset);
367 uint32_t length = read_u32(src, offset+8);
368 uint32_t i, description;
369 if (length && type == MLUC_TYPE) {
370 length = read_u32(src, offset+20);
371 if (!length || (length & 1) || (read_u32(src, offset+12) != 12))
372 goto invalid_desc_tag;
373 description = offset + read_u32(src, offset+24);
375 goto invalid_desc_tag;
376 } else if (length && type == DESC_TYPE) {
377 description = offset + 12;
379 goto invalid_desc_tag;
383 for (i = 0; i < length; ++i)
384 profile->description[i] = read_u8(src, description+i);
385 profile->description[length] = 0;
387 goto invalid_desc_tag;
394 invalid_source(src, "invalid description");
398 #define XYZ_TYPE 0x58595a20 // 'XYZ '
399 #define CURVE_TYPE 0x63757276 // 'curv'
400 #define PARAMETRIC_CURVE_TYPE 0x70617261 // 'para'
401 #define LUT16_TYPE 0x6d667432 // 'mft2'
402 #define LUT8_TYPE 0x6d667431 // 'mft1'
403 #define LUT_MAB_TYPE 0x6d414220 // 'mAB '
404 #define LUT_MBA_TYPE 0x6d424120 // 'mBA '
405 #define CHROMATIC_TYPE 0x73663332 // 'sf32'
407 static struct matrix read_tag_s15Fixed16ArrayType(struct mem_source *src, struct tag_index index, uint32_t tag_id)
409 struct tag *tag = find_tag(index, tag_id);
410 struct matrix matrix;
413 uint32_t offset = tag->offset;
414 uint32_t type = read_u32(src, offset);
416 // Check mandatory type signature for s16Fixed16ArrayType
417 if (type != CHROMATIC_TYPE) {
418 invalid_source(src, "unexpected type, expected 'sf32'");
421 for (i = 0; i < 9; i++) {
422 matrix.m[i/3][i%3] = s15Fixed16Number_to_float(read_s15Fixed16Number(src, offset+8+i*4));
424 matrix.invalid = false;
426 matrix.invalid = true;
427 invalid_source(src, "missing sf32tag");
432 static struct XYZNumber read_tag_XYZType(struct mem_source *src, struct tag_index index, uint32_t tag_id)
434 struct XYZNumber num = {0, 0, 0};
435 struct tag *tag = find_tag(index, tag_id);
437 uint32_t offset = tag->offset;
439 uint32_t type = read_u32(src, offset);
440 if (type != XYZ_TYPE)
441 invalid_source(src, "unexpected type, expected XYZ");
442 num.X = read_s15Fixed16Number(src, offset+8);
443 num.Y = read_s15Fixed16Number(src, offset+12);
444 num.Z = read_s15Fixed16Number(src, offset+16);
446 invalid_source(src, "missing xyztag");
451 // Read the tag at a given offset rather then the tag_index.
452 // This method is used when reading mAB tags where nested curveType are
453 // present that are not part of the tag_index.
454 static struct curveType *read_curveType(struct mem_source *src, uint32_t offset, uint32_t *len)
456 static const uint32_t COUNT_TO_LENGTH[5] = {1, 3, 4, 5, 7};
457 struct curveType *curve = NULL;
458 uint32_t type = read_u32(src, offset);
462 if (type != CURVE_TYPE && type != PARAMETRIC_CURVE_TYPE) {
463 invalid_source(src, "unexpected type, expected CURV or PARA");
467 if (type == CURVE_TYPE) {
468 count = read_u32(src, offset+8);
470 #define MAX_CURVE_ENTRIES 40000 //arbitrary
471 if (count > MAX_CURVE_ENTRIES) {
472 invalid_source(src, "curve size too large");
475 curve = malloc(sizeof(struct curveType) + sizeof(uInt16Number)*count);
479 curve->count = count;
482 for (i=0; i<count; i++) {
483 curve->data[i] = read_u16(src, offset + 12 + i*2);
485 *len = 12 + count * 2;
486 } else { //PARAMETRIC_CURVE_TYPE
487 count = read_u16(src, offset+8);
490 invalid_source(src, "parametric function type not supported.");
494 curve = malloc(sizeof(struct curveType));
498 curve->count = count;
501 for (i=0; i < COUNT_TO_LENGTH[count]; i++) {
502 curve->parameter[i] = s15Fixed16Number_to_float(read_s15Fixed16Number(src, offset + 12 + i*4));
504 *len = 12 + COUNT_TO_LENGTH[count] * 4;
506 if ((count == 1 || count == 2)) {
507 /* we have a type 1 or type 2 function that has a division by 'a' */
508 float a = curve->parameter[1];
510 invalid_source(src, "parametricCurve definition causes division by zero.");
517 static struct curveType *read_tag_curveType(struct mem_source *src, struct tag_index index, uint32_t tag_id)
519 struct tag *tag = find_tag(index, tag_id);
520 struct curveType *curve = NULL;
523 return read_curveType(src, tag->offset, &len);
525 invalid_source(src, "missing curvetag");
531 #define MAX_CLUT_SIZE 500000 // arbitrary
532 #define MAX_CHANNELS 10 // arbitrary
533 static void read_nested_curveType(struct mem_source *src, struct curveType *(*curveArray)[MAX_CHANNELS], uint8_t num_channels, uint32_t curve_offset)
535 uint32_t channel_offset = 0;
537 for (i = 0; i < num_channels; i++) {
538 uint32_t tag_len = ~0;
540 (*curveArray)[i] = read_curveType(src, curve_offset + channel_offset, &tag_len);
541 if (!(*curveArray)[i]) {
542 invalid_source(src, "invalid nested curveType curve");
546 invalid_source(src, "invalid nested curveType tag length");
550 channel_offset += tag_len;
552 if ((tag_len % 4) != 0)
553 channel_offset += 4 - (tag_len % 4);
557 static void mAB_release(struct lutmABType *lut)
561 for (i = 0; i < lut->num_in_channels; i++){
562 free(lut->a_curves[i]);
564 for (i = 0; i < lut->num_out_channels; i++){
565 free(lut->b_curves[i]);
566 free(lut->m_curves[i]);
571 /* See section 10.10 for specs */
572 static struct lutmABType *read_tag_lutmABType(struct mem_source *src, struct tag_index index, uint32_t tag_id)
574 struct tag *tag = find_tag(index, tag_id);
575 uint32_t offset = tag->offset;
576 uint32_t a_curve_offset, b_curve_offset, m_curve_offset;
577 uint32_t matrix_offset;
578 uint32_t clut_offset;
579 uint32_t clut_size = 1;
580 uint8_t clut_precision;
581 uint32_t type = read_u32(src, offset);
582 uint8_t num_in_channels, num_out_channels;
583 struct lutmABType *lut;
586 if (type != LUT_MAB_TYPE && type != LUT_MBA_TYPE) {
590 num_in_channels = read_u8(src, offset + 8);
591 num_out_channels = read_u8(src, offset + 8);
592 if (num_in_channels > MAX_CHANNELS || num_out_channels > MAX_CHANNELS)
595 // We require 3in/out channels since we only support RGB->XYZ (or RGB->LAB)
596 // XXX: If we remove this restriction make sure that the number of channels
597 // is less or equal to the maximum number of mAB curves in qcmsint.h
598 // also check for clut_size overflow.
599 if (num_in_channels != 3 || num_out_channels != 3)
602 // some of this data is optional and is denoted by a zero offset
603 // we also use this to track their existance
604 a_curve_offset = read_u32(src, offset + 28);
605 clut_offset = read_u32(src, offset + 24);
606 m_curve_offset = read_u32(src, offset + 20);
607 matrix_offset = read_u32(src, offset + 16);
608 b_curve_offset = read_u32(src, offset + 12);
610 // Convert offsets relative to the tag to relative to the profile
611 // preserve zero for optional fields
613 a_curve_offset += offset;
615 clut_offset += offset;
617 m_curve_offset += offset;
619 matrix_offset += offset;
621 b_curve_offset += offset;
624 assert (num_in_channels == 3);
625 // clut_size can not overflow since lg(256^num_in_channels) = 24 bits.
626 for (i = 0; i < num_in_channels; i++) {
627 clut_size *= read_u8(src, clut_offset + i);
633 // 24bits * 3 won't overflow either
634 clut_size = clut_size * num_out_channels;
636 if (clut_size > MAX_CLUT_SIZE)
639 lut = malloc(sizeof(struct lutmABType) + (clut_size) * sizeof(float));
642 // we'll fill in the rest below
643 memset(lut, 0, sizeof(struct lutmABType));
644 lut->clut_table = &lut->clut_table_data[0];
646 for (i = 0; i < num_in_channels; i++) {
647 lut->num_grid_points[i] = read_u8(src, clut_offset + i);
650 // Reverse the processing of transformation elements for mBA type.
651 lut->reversed = (type == LUT_MBA_TYPE);
653 lut->num_in_channels = num_in_channels;
654 lut->num_out_channels = num_out_channels;
657 // read the matrix if we have it
658 lut->e00 = read_s15Fixed16Number(src, matrix_offset+4*0);
659 lut->e01 = read_s15Fixed16Number(src, matrix_offset+4*1);
660 lut->e02 = read_s15Fixed16Number(src, matrix_offset+4*2);
661 lut->e10 = read_s15Fixed16Number(src, matrix_offset+4*3);
662 lut->e11 = read_s15Fixed16Number(src, matrix_offset+4*4);
663 lut->e12 = read_s15Fixed16Number(src, matrix_offset+4*5);
664 lut->e20 = read_s15Fixed16Number(src, matrix_offset+4*6);
665 lut->e21 = read_s15Fixed16Number(src, matrix_offset+4*7);
666 lut->e22 = read_s15Fixed16Number(src, matrix_offset+4*8);
667 lut->e03 = read_s15Fixed16Number(src, matrix_offset+4*9);
668 lut->e13 = read_s15Fixed16Number(src, matrix_offset+4*10);
669 lut->e23 = read_s15Fixed16Number(src, matrix_offset+4*11);
672 if (a_curve_offset) {
673 read_nested_curveType(src, &lut->a_curves, num_in_channels, a_curve_offset);
675 if (m_curve_offset) {
676 read_nested_curveType(src, &lut->m_curves, num_out_channels, m_curve_offset);
678 if (b_curve_offset) {
679 read_nested_curveType(src, &lut->b_curves, num_out_channels, b_curve_offset);
681 invalid_source(src, "B curves required");
685 clut_precision = read_u8(src, clut_offset + 16);
686 if (clut_precision == 1) {
687 for (i = 0; i < clut_size; i++) {
688 lut->clut_table[i] = uInt8Number_to_float(read_uInt8Number(src, clut_offset + 20 + i*1));
690 } else if (clut_precision == 2) {
691 for (i = 0; i < clut_size; i++) {
692 lut->clut_table[i] = uInt16Number_to_float(read_uInt16Number(src, clut_offset + 20 + i*2));
695 invalid_source(src, "Invalid clut precision");
707 static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index index, uint32_t tag_id)
709 struct tag *tag = find_tag(index, tag_id);
710 uint32_t offset = tag->offset;
711 uint32_t type = read_u32(src, offset);
712 uint16_t num_input_table_entries;
713 uint16_t num_output_table_entries;
714 uint8_t in_chan, grid_points, out_chan;
715 size_t clut_offset, output_offset;
721 /* I'm not sure why the spec specifies a fixed number of entries for LUT8 tables even though
722 * they have room for the num_entries fields */
723 if (type == LUT8_TYPE) {
724 num_input_table_entries = 256;
725 num_output_table_entries = 256;
727 } else if (type == LUT16_TYPE) {
728 num_input_table_entries = read_u16(src, offset + 48);
729 num_output_table_entries = read_u16(src, offset + 50);
732 assert(0); // the caller checks that this doesn't happen
733 invalid_source(src, "Unexpected lut type");
737 in_chan = read_u8(src, offset + 8);
738 out_chan = read_u8(src, offset + 9);
739 grid_points = read_u8(src, offset + 10);
741 clut_size = pow(grid_points, in_chan);
742 if (clut_size > MAX_CLUT_SIZE) {
746 if (in_chan != 3 || out_chan != 3) {
750 lut = malloc(sizeof(struct lutType) + (num_input_table_entries * in_chan + clut_size*out_chan + num_output_table_entries * out_chan)*sizeof(float));
755 /* compute the offsets of tables */
756 lut->input_table = &lut->table_data[0];
757 lut->clut_table = &lut->table_data[in_chan*num_input_table_entries];
758 lut->output_table = &lut->table_data[in_chan*num_input_table_entries + clut_size*out_chan];
760 lut->num_input_table_entries = num_input_table_entries;
761 lut->num_output_table_entries = num_output_table_entries;
762 lut->num_input_channels = read_u8(src, offset + 8);
763 lut->num_output_channels = read_u8(src, offset + 9);
764 lut->num_clut_grid_points = read_u8(src, offset + 10);
765 lut->e00 = read_s15Fixed16Number(src, offset+12);
766 lut->e01 = read_s15Fixed16Number(src, offset+16);
767 lut->e02 = read_s15Fixed16Number(src, offset+20);
768 lut->e10 = read_s15Fixed16Number(src, offset+24);
769 lut->e11 = read_s15Fixed16Number(src, offset+28);
770 lut->e12 = read_s15Fixed16Number(src, offset+32);
771 lut->e20 = read_s15Fixed16Number(src, offset+36);
772 lut->e21 = read_s15Fixed16Number(src, offset+40);
773 lut->e22 = read_s15Fixed16Number(src, offset+44);
775 for (i = 0; i < lut->num_input_table_entries * in_chan; i++) {
776 if (type == LUT8_TYPE) {
777 lut->input_table[i] = uInt8Number_to_float(read_uInt8Number(src, offset + 52 + i * entry_size));
779 lut->input_table[i] = uInt16Number_to_float(read_uInt16Number(src, offset + 52 + i * entry_size));
783 clut_offset = offset + 52 + lut->num_input_table_entries * in_chan * entry_size;
784 for (i = 0; i < clut_size * out_chan; i+=3) {
785 if (type == LUT8_TYPE) {
786 lut->clut_table[i+0] = uInt8Number_to_float(read_uInt8Number(src, clut_offset + i*entry_size + 0));
787 lut->clut_table[i+1] = uInt8Number_to_float(read_uInt8Number(src, clut_offset + i*entry_size + 1));
788 lut->clut_table[i+2] = uInt8Number_to_float(read_uInt8Number(src, clut_offset + i*entry_size + 2));
790 lut->clut_table[i+0] = uInt16Number_to_float(read_uInt16Number(src, clut_offset + i*entry_size + 0));
791 lut->clut_table[i+1] = uInt16Number_to_float(read_uInt16Number(src, clut_offset + i*entry_size + 2));
792 lut->clut_table[i+2] = uInt16Number_to_float(read_uInt16Number(src, clut_offset + i*entry_size + 4));
796 output_offset = clut_offset + clut_size * out_chan * entry_size;
797 for (i = 0; i < lut->num_output_table_entries * out_chan; i++) {
798 if (type == LUT8_TYPE) {
799 lut->output_table[i] = uInt8Number_to_float(read_uInt8Number(src, output_offset + i*entry_size));
801 lut->output_table[i] = uInt16Number_to_float(read_uInt16Number(src, output_offset + i*entry_size));
808 static void read_rendering_intent(qcms_profile *profile, struct mem_source *src)
810 profile->rendering_intent = read_u32(src, 64);
811 switch (profile->rendering_intent) {
812 case QCMS_INTENT_PERCEPTUAL:
813 case QCMS_INTENT_SATURATION:
814 case QCMS_INTENT_RELATIVE_COLORIMETRIC:
815 case QCMS_INTENT_ABSOLUTE_COLORIMETRIC:
818 invalid_source(src, "unknown rendering intent");
822 qcms_profile *qcms_profile_create(void)
824 return calloc(sizeof(qcms_profile), 1);
829 /* build sRGB gamma table */
830 /* based on cmsBuildParametricGamma() */
831 static uint16_t *build_sRGB_gamma_table(int num_entries)
834 /* taken from lcms: Build_sRGBGamma() */
837 double b = 0.055/1.055;
841 uint16_t *table = malloc(sizeof(uint16_t) * num_entries);
845 for (i=0; i<num_entries; i++) {
846 double x = (double)i / (num_entries-1);
848 // IEC 61966-2.1 (sRGB)
849 // Y = (aX + b)^Gamma | X >= d
852 double e = (a*x + b);
861 // Saturate -- this could likely move to a separate function
862 output = y * 65535. + .5;
867 table[i] = (uint16_t)floor(output);
872 static struct curveType *curve_from_table(uint16_t *table, int num_entries)
874 struct curveType *curve;
876 curve = malloc(sizeof(struct curveType) + sizeof(uInt16Number)*num_entries);
879 curve->type = CURVE_TYPE;
880 curve->count = num_entries;
881 for (i = 0; i < num_entries; i++) {
882 curve->data[i] = table[i];
887 static uint16_t float_to_u8Fixed8Number(float a)
889 if (a > (255.f + 255.f/256))
894 return floor(a*256.f + .5f);
897 static struct curveType *curve_from_gamma(float gamma)
899 struct curveType *curve;
901 curve = malloc(sizeof(struct curveType) + sizeof(uInt16Number)*num_entries);
904 curve->count = num_entries;
905 curve->data[0] = float_to_u8Fixed8Number(gamma);
910 //XXX: it would be nice if we had a way of ensuring
911 // everything in a profile was initialized regardless of how it was created
913 //XXX: should this also be taking a black_point?
914 /* similar to CGColorSpaceCreateCalibratedRGB */
915 qcms_profile* qcms_profile_create_rgb_with_gamma(
916 qcms_CIE_xyY white_point,
917 qcms_CIE_xyYTRIPLE primaries,
920 qcms_profile* profile = qcms_profile_create();
922 return NO_MEM_PROFILE;
924 //XXX: should store the whitepoint
925 if (!set_rgb_colorants(profile, white_point, primaries)) {
926 qcms_profile_release(profile);
927 return INVALID_PROFILE;
930 profile->redTRC = curve_from_gamma(gamma);
931 profile->blueTRC = curve_from_gamma(gamma);
932 profile->greenTRC = curve_from_gamma(gamma);
934 if (!profile->redTRC || !profile->blueTRC || !profile->greenTRC) {
935 qcms_profile_release(profile);
936 return NO_MEM_PROFILE;
938 profile->class = DISPLAY_DEVICE_PROFILE;
939 profile->rendering_intent = QCMS_INTENT_PERCEPTUAL;
940 profile->color_space = RGB_SIGNATURE;
944 qcms_profile* qcms_profile_create_rgb_with_table(
945 qcms_CIE_xyY white_point,
946 qcms_CIE_xyYTRIPLE primaries,
947 uint16_t *table, int num_entries)
949 qcms_profile* profile = qcms_profile_create();
951 return NO_MEM_PROFILE;
953 //XXX: should store the whitepoint
954 if (!set_rgb_colorants(profile, white_point, primaries)) {
955 qcms_profile_release(profile);
956 return INVALID_PROFILE;
959 profile->redTRC = curve_from_table(table, num_entries);
960 profile->blueTRC = curve_from_table(table, num_entries);
961 profile->greenTRC = curve_from_table(table, num_entries);
963 if (!profile->redTRC || !profile->blueTRC || !profile->greenTRC) {
964 qcms_profile_release(profile);
965 return NO_MEM_PROFILE;
967 profile->class = DISPLAY_DEVICE_PROFILE;
968 profile->rendering_intent = QCMS_INTENT_PERCEPTUAL;
969 profile->color_space = RGB_SIGNATURE;
973 /* from lcms: cmsWhitePointFromTemp */
974 /* tempK must be >= 4000. and <= 25000.
975 * similar to argyll: icx_DTEMP2XYZ() */
976 static qcms_CIE_xyY white_point_from_temp(int temp_K)
978 qcms_CIE_xyY white_point;
983 // No optimization provided.
988 // For correlated color temperature (T) between 4000K and 7000K:
989 if (T >= 4000. && T <= 7000.) {
990 x = -4.6070*(1E9/T3) + 2.9678*(1E6/T2) + 0.09911*(1E3/T) + 0.244063;
992 // or for correlated color temperature (T) between 7000K and 25000K:
993 if (T > 7000.0 && T <= 25000.0) {
994 x = -2.0064*(1E9/T3) + 1.9018*(1E6/T2) + 0.24748*(1E3/T) + 0.237040;
996 assert(0 && "invalid temp");
1002 y = -3.000*(x*x) + 2.870*x - 0.275;
1004 // wave factors (not used, but here for futures extensions)
1006 // M1 = (-1.3515 - 1.7703*x + 5.9114 *y)/(0.0241 + 0.2562*x - 0.7341*y);
1007 // M2 = (0.0300 - 31.4424*x + 30.0717*y)/(0.0241 + 0.2562*x - 0.7341*y);
1009 // Fill white_point struct
1012 white_point.Y = 1.0;
1017 qcms_profile* qcms_profile_sRGB(void)
1019 qcms_profile *profile;
1022 qcms_CIE_xyYTRIPLE Rec709Primaries = {
1023 {0.6400, 0.3300, 1.0},
1024 {0.3000, 0.6000, 1.0},
1025 {0.1500, 0.0600, 1.0}
1029 D65 = white_point_from_temp(6504);
1031 table = build_sRGB_gamma_table(1024);
1034 return NO_MEM_PROFILE;
1036 profile = qcms_profile_create_rgb_with_table(D65, Rec709Primaries, table, 1024);
1038 strcpy(profile->description, "sRGB IEC61966-2.1");
1045 /* qcms_profile_from_memory does not hold a reference to the memory passed in */
1046 qcms_profile* qcms_profile_from_memory(const void *mem, size_t size)
1049 struct mem_source source;
1050 struct mem_source *src = &source;
1051 struct tag_index index;
1052 qcms_profile *profile;
1056 source.valid = true;
1059 return INVALID_PROFILE;
1061 length = read_u32(src, 0);
1062 if (length <= size) {
1063 // shrink the area that we can read if appropriate
1064 source.size = length;
1066 return INVALID_PROFILE;
1069 /* ensure that the profile size is sane so it's easier to reason about */
1070 if (source.size <= 64 || source.size >= MAX_PROFILE_SIZE)
1071 return INVALID_PROFILE;
1073 profile = qcms_profile_create();
1075 return NO_MEM_PROFILE;
1077 check_CMM_type_signature(src);
1078 check_profile_version(src);
1079 read_class_signature(profile, src);
1080 read_rendering_intent(profile, src);
1081 read_color_space(profile, src);
1082 read_pcs(profile, src);
1083 //TODO read rest of profile stuff
1086 goto invalid_profile;
1088 index = read_tag_table(profile, src);
1089 if (!src->valid || !index.tags)
1090 goto invalid_tag_table;
1092 if (!read_tag_descType(profile, src, index, TAG_desc))
1093 goto invalid_tag_table;
1095 if (find_tag(index, TAG_CHAD)) {
1096 profile->chromaticAdaption = read_tag_s15Fixed16ArrayType(src, index, TAG_CHAD);
1098 profile->chromaticAdaption.invalid = true; //Signal the data is not present
1101 if (profile->class == DISPLAY_DEVICE_PROFILE || profile->class == INPUT_DEVICE_PROFILE ||
1102 profile->class == OUTPUT_DEVICE_PROFILE || profile->class == COLOR_SPACE_PROFILE) {
1103 if (profile->color_space == RGB_SIGNATURE) {
1104 if (find_tag(index, TAG_A2B0)) {
1105 if (read_u32(src, find_tag(index, TAG_A2B0)->offset) == LUT8_TYPE ||
1106 read_u32(src, find_tag(index, TAG_A2B0)->offset) == LUT16_TYPE) {
1107 profile->A2B0 = read_tag_lutType(src, index, TAG_A2B0);
1108 } else if (read_u32(src, find_tag(index, TAG_A2B0)->offset) == LUT_MAB_TYPE) {
1109 profile->mAB = read_tag_lutmABType(src, index, TAG_A2B0);
1112 if (find_tag(index, TAG_B2A0)) {
1113 if (read_u32(src, find_tag(index, TAG_B2A0)->offset) == LUT8_TYPE ||
1114 read_u32(src, find_tag(index, TAG_B2A0)->offset) == LUT16_TYPE) {
1115 profile->B2A0 = read_tag_lutType(src, index, TAG_B2A0);
1116 } else if (read_u32(src, find_tag(index, TAG_B2A0)->offset) == LUT_MBA_TYPE) {
1117 profile->mBA = read_tag_lutmABType(src, index, TAG_B2A0);
1120 if (find_tag(index, TAG_rXYZ) || !qcms_supports_iccv4) {
1121 profile->redColorant = read_tag_XYZType(src, index, TAG_rXYZ);
1122 profile->greenColorant = read_tag_XYZType(src, index, TAG_gXYZ);
1123 profile->blueColorant = read_tag_XYZType(src, index, TAG_bXYZ);
1127 goto invalid_tag_table;
1129 if (find_tag(index, TAG_rTRC) || !qcms_supports_iccv4) {
1130 profile->redTRC = read_tag_curveType(src, index, TAG_rTRC);
1131 profile->greenTRC = read_tag_curveType(src, index, TAG_gTRC);
1132 profile->blueTRC = read_tag_curveType(src, index, TAG_bTRC);
1134 if (!profile->redTRC || !profile->blueTRC || !profile->greenTRC)
1135 goto invalid_tag_table;
1137 } else if (profile->color_space == GRAY_SIGNATURE) {
1139 profile->grayTRC = read_tag_curveType(src, index, TAG_kTRC);
1140 if (!profile->grayTRC)
1141 goto invalid_tag_table;
1144 assert(0 && "read_color_space protects against entering here");
1145 goto invalid_tag_table;
1148 goto invalid_tag_table;
1152 goto invalid_tag_table;
1161 qcms_profile_release(profile);
1162 return INVALID_PROFILE;
1165 qcms_bool qcms_profile_match(qcms_profile *p1, qcms_profile *p2)
1167 return memcmp(p1->description, p2->description, sizeof p1->description) == 0;
1170 qcms_intent qcms_profile_get_rendering_intent(qcms_profile *profile)
1172 return profile->rendering_intent;
1175 icColorSpaceSignature
1176 qcms_profile_get_color_space(qcms_profile *profile)
1178 return profile->color_space;
1181 static void lut_release(struct lutType *lut)
1186 void qcms_profile_release(qcms_profile *profile)
1188 if (profile->output_table_r)
1189 precache_release(profile->output_table_r);
1190 if (profile->output_table_g)
1191 precache_release(profile->output_table_g);
1192 if (profile->output_table_b)
1193 precache_release(profile->output_table_b);
1196 lut_release(profile->A2B0);
1198 lut_release(profile->B2A0);
1201 mAB_release(profile->mAB);
1203 mAB_release(profile->mBA);
1205 free(profile->redTRC);
1206 free(profile->blueTRC);
1207 free(profile->greenTRC);
1208 free(profile->grayTRC);
1214 qcms_profile* qcms_profile_from_file(FILE *file)
1216 uint32_t length, remaining_length;
1217 qcms_profile *profile;
1222 if (fread(&length_be, 1, sizeof(length_be), file) != sizeof(length_be))
1223 return BAD_VALUE_PROFILE;
1225 length = be32_to_cpu(length_be);
1226 if (length > MAX_PROFILE_SIZE || length < sizeof(length_be))
1227 return BAD_VALUE_PROFILE;
1229 /* allocate room for the entire profile */
1230 data = malloc(length);
1232 return NO_MEM_PROFILE;
1234 /* copy in length to the front so that the buffer will contain the entire profile */
1235 *((be32*)data) = length_be;
1236 remaining_length = length - sizeof(length_be);
1238 /* read the rest profile */
1239 read_length = fread((unsigned char*)data + sizeof(length_be), 1, remaining_length, file);
1240 if (read_length != remaining_length) {
1242 return INVALID_PROFILE;
1245 profile = qcms_profile_from_memory(data, length);
1250 qcms_profile* qcms_profile_from_path(const char *path)
1252 qcms_profile *profile = NULL;
1253 FILE *file = fopen(path, "rb");
1255 profile = qcms_profile_from_file(file);
1262 /* Unicode path version */
1263 qcms_profile* qcms_profile_from_unicode_path(const wchar_t *path)
1265 qcms_profile *profile = NULL;
1266 FILE *file = _wfopen(path, L"rb");
1268 profile = qcms_profile_from_file(file);