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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkCodec.h" | 8 #include "SkCodec.h" |
9 #include "SkJpegCodec.h" | 9 #include "SkJpegCodec.h" |
10 #include "SkJpegDecoderMgr.h" | 10 #include "SkJpegDecoderMgr.h" |
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80 JpegDecoderMgr* decoderMgr) | 80 JpegDecoderMgr* decoderMgr) |
81 : INHERITED(srcInfo, stream) | 81 : INHERITED(srcInfo, stream) |
82 , fDecoderMgr(decoderMgr) | 82 , fDecoderMgr(decoderMgr) |
83 , fReadyState(decoderMgr->dinfo()->global_state) | 83 , fReadyState(decoderMgr->dinfo()->global_state) |
84 {} | 84 {} |
85 | 85 |
86 /* | 86 /* |
87 * Return the row bytes of a particular image type and width | 87 * Return the row bytes of a particular image type and width |
88 */ | 88 */ |
89 static int get_row_bytes(const j_decompress_ptr dinfo) { | 89 static int get_row_bytes(const j_decompress_ptr dinfo) { |
90 #if defined (GOOGLE3) | |
91 int colorBytes = dinfo->out_color_components; | |
92 #else | |
93 int colorBytes = (dinfo->out_color_space == JCS_RGB565) ? 2 : dinfo->out_col
or_components; | 90 int colorBytes = (dinfo->out_color_space == JCS_RGB565) ? 2 : dinfo->out_col
or_components; |
94 #endif | |
95 return dinfo->output_width * colorBytes; | 91 return dinfo->output_width * colorBytes; |
96 | 92 |
97 } | 93 } |
98 | 94 |
99 /* | 95 /* |
100 * Calculate output dimensions based on the provided factors. | 96 * Calculate output dimensions based on the provided factors. |
101 * | 97 * |
102 * Not to be used on the actual jpeg_decompress_struct used for decoding, since
it will | 98 * Not to be used on the actual jpeg_decompress_struct used for decoding, since
it will |
103 * incorrectly modify num_components. | 99 * incorrectly modify num_components. |
104 */ | 100 */ |
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180 bool isCMYK = JCS_CMYK == colorSpace || JCS_YCCK == colorSpace; | 176 bool isCMYK = JCS_CMYK == colorSpace || JCS_YCCK == colorSpace; |
181 | 177 |
182 // Check for valid color types and set the output color space | 178 // Check for valid color types and set the output color space |
183 switch (dst.colorType()) { | 179 switch (dst.colorType()) { |
184 case kN32_SkColorType: | 180 case kN32_SkColorType: |
185 if (isCMYK) { | 181 if (isCMYK) { |
186 fDecoderMgr->dinfo()->out_color_space = JCS_CMYK; | 182 fDecoderMgr->dinfo()->out_color_space = JCS_CMYK; |
187 } else { | 183 } else { |
188 // Check the byte ordering of the RGBA color space for the | 184 // Check the byte ordering of the RGBA color space for the |
189 // current platform | 185 // current platform |
190 #if defined(GOOGLE3) | 186 #if defined(SK_PMCOLOR_IS_RGBA) |
191 return false; | 187 fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA; |
192 #else | 188 #else |
193 #if defined(SK_PMCOLOR_IS_RGBA) | |
194 fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA; | |
195 #else | |
196 fDecoderMgr->dinfo()->out_color_space = JCS_EXT_BGRA; | 189 fDecoderMgr->dinfo()->out_color_space = JCS_EXT_BGRA; |
197 #endif | |
198 #endif | 190 #endif |
199 } | 191 } |
200 return true; | 192 return true; |
201 case kRGB_565_SkColorType: | 193 case kRGB_565_SkColorType: |
202 if (isCMYK) { | 194 if (isCMYK) { |
203 fDecoderMgr->dinfo()->out_color_space = JCS_CMYK; | 195 fDecoderMgr->dinfo()->out_color_space = JCS_CMYK; |
204 } else { | 196 } else { |
205 #if defined(GOOGLE3) | |
206 return false; | |
207 #else | |
208 fDecoderMgr->dinfo()->dither_mode = JDITHER_NONE; | 197 fDecoderMgr->dinfo()->dither_mode = JDITHER_NONE; |
209 fDecoderMgr->dinfo()->out_color_space = JCS_RGB565; | 198 fDecoderMgr->dinfo()->out_color_space = JCS_RGB565; |
210 #endif | |
211 } | 199 } |
212 return true; | 200 return true; |
213 case kGray_8_SkColorType: | 201 case kGray_8_SkColorType: |
214 if (isCMYK) { | 202 if (isCMYK) { |
215 return false; | 203 return false; |
216 } else { | 204 } else { |
217 // We will enable decodes to gray even if the image is color bec
ause this is | 205 // We will enable decodes to gray even if the image is color bec
ause this is |
218 // much faster than decoding to color and then converting | 206 // much faster than decoding to color and then converting |
219 fDecoderMgr->dinfo()->out_color_space = JCS_GRAYSCALE; | 207 fDecoderMgr->dinfo()->out_color_space = JCS_GRAYSCALE; |
220 } | 208 } |
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351 srcConfig = SkSwizzler::kRGBX; | 339 srcConfig = SkSwizzler::kRGBX; |
352 break; | 340 break; |
353 case kBGRA_8888_SkColorType: | 341 case kBGRA_8888_SkColorType: |
354 srcConfig = SkSwizzler::kBGRX; | 342 srcConfig = SkSwizzler::kBGRX; |
355 break; | 343 break; |
356 case kRGB_565_SkColorType: | 344 case kRGB_565_SkColorType: |
357 srcConfig = SkSwizzler::kRGB_565; | 345 srcConfig = SkSwizzler::kRGB_565; |
358 break; | 346 break; |
359 default: | 347 default: |
360 // This function should only be called if the colorType is suppo
rted by jpeg | 348 // This function should only be called if the colorType is suppo
rted by jpeg |
361 #if defined(GOOGLE3) | |
362 SK_CRASH(); | |
363 #else | |
364 SkASSERT(false); | 349 SkASSERT(false); |
365 #endif | |
366 } | 350 } |
367 } | 351 } |
368 | 352 |
369 fSwizzler.reset(SkSwizzler::CreateSwizzler(srcConfig, nullptr, dstInfo, opti
ons)); | 353 fSwizzler.reset(SkSwizzler::CreateSwizzler(srcConfig, nullptr, dstInfo, opti
ons)); |
370 fStorage.reset(get_row_bytes(fDecoderMgr->dinfo())); | 354 fStorage.reset(get_row_bytes(fDecoderMgr->dinfo())); |
371 fSrcRow = static_cast<uint8_t*>(fStorage.get()); | 355 fSrcRow = static_cast<uint8_t*>(fStorage.get()); |
372 } | 356 } |
373 | 357 |
374 SkSampler* SkJpegCodec::getSampler(bool createIfNecessary) { | 358 SkSampler* SkJpegCodec::getSampler(bool createIfNecessary) { |
375 if (!createIfNecessary || fSwizzler) { | 359 if (!createIfNecessary || fSwizzler) { |
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463 #endif | 447 #endif |
464 | 448 |
465 bool SkJpegCodec::onSkipScanlines(int count) { | 449 bool SkJpegCodec::onSkipScanlines(int count) { |
466 // Set the jump location for libjpeg errors | 450 // Set the jump location for libjpeg errors |
467 if (setjmp(fDecoderMgr->getJmpBuf())) { | 451 if (setjmp(fDecoderMgr->getJmpBuf())) { |
468 return fDecoderMgr->returnFalse("setjmp"); | 452 return fDecoderMgr->returnFalse("setjmp"); |
469 } | 453 } |
470 | 454 |
471 return (uint32_t) count == jpeg_skip_scanlines(fDecoderMgr->dinfo(), count); | 455 return (uint32_t) count == jpeg_skip_scanlines(fDecoderMgr->dinfo(), count); |
472 } | 456 } |
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