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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 "SkCodecPriv.h" | 9 #include "SkCodecPriv.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
11 #include "SkColorTable.h" | 11 #include "SkColorTable.h" |
12 #include "SkScaledCodec.h" | |
13 #include "SkStream.h" | 12 #include "SkStream.h" |
14 #include "SkCodec_wbmp.h" | 13 #include "SkCodec_wbmp.h" |
15 | 14 |
16 // Each bit represents a pixel, so width is actually a number of bits. | 15 // Each bit represents a pixel, so width is actually a number of bits. |
17 // A row will always be stored in bytes, so we round width up to the | 16 // A row will always be stored in bytes, so we round width up to the |
18 // nearest multiple of 8 to get the number of bits actually in the row. | 17 // nearest multiple of 8 to get the number of bits actually in the row. |
19 // We then divide by 8 to convert to bytes. | 18 // We then divide by 8 to convert to bytes. |
20 static inline size_t get_src_row_bytes(int width) { | 19 static inline size_t get_src_row_bytes(int width) { |
21 return SkAlign8(width) >> 3; | 20 return SkAlign8(width) >> 3; |
22 } | 21 } |
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74 SkSwizzler* SkWbmpCodec::initializeSwizzler(const SkImageInfo& info, | 73 SkSwizzler* SkWbmpCodec::initializeSwizzler(const SkImageInfo& info, |
75 const SkPMColor* ctable, const Options& opts) { | 74 const SkPMColor* ctable, const Options& opts) { |
76 // TODO (msarett): Reenable support for 565 if it is desired | 75 // TODO (msarett): Reenable support for 565 if it is desired |
77 // skbug.com/3683 | 76 // skbug.com/3683 |
78 | 77 |
79 // Create the swizzler based on the desired color type | 78 // Create the swizzler based on the desired color type |
80 switch (info.colorType()) { | 79 switch (info.colorType()) { |
81 case kIndex_8_SkColorType: | 80 case kIndex_8_SkColorType: |
82 case kN32_SkColorType: | 81 case kN32_SkColorType: |
83 case kGray_8_SkColorType: | 82 case kGray_8_SkColorType: |
84 return SkSwizzler::CreateSwizzler(SkSwizzler::kBit, ctable, info, op
ts.fZeroInitialized, | 83 return SkSwizzler::CreateSwizzler( |
85 this->getInfo()); | 84 SkSwizzler::kBit, ctable, info, opts.fZeroInitialized); |
86 default: | 85 default: |
87 return NULL; | 86 return NULL; |
88 } | 87 } |
89 } | 88 } |
90 | 89 |
91 SkCodec::Result SkWbmpCodec::readRow(uint8_t* row) { | 90 SkCodec::Result SkWbmpCodec::readRow(uint8_t* row) { |
92 if (this->stream()->read(row, fSrcRowBytes) != fSrcRowBytes) { | 91 if (this->stream()->read(row, fSrcRowBytes) != fSrcRowBytes) { |
93 return kIncompleteInput; | 92 return kIncompleteInput; |
94 } | 93 } |
95 return kSuccess; | 94 return kSuccess; |
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195 const SkCodec::Options& options, SkPMColor inputColorTable[], | 194 const SkCodec::Options& options, SkPMColor inputColorTable[], |
196 int* inputColorCount) { | 195 int* inputColorCount) { |
197 if (!fCodec->rewindIfNeeded()) { | 196 if (!fCodec->rewindIfNeeded()) { |
198 return SkCodec::kCouldNotRewind; | 197 return SkCodec::kCouldNotRewind; |
199 } | 198 } |
200 if (options.fSubset) { | 199 if (options.fSubset) { |
201 // Subsets are not supported. | 200 // Subsets are not supported. |
202 return SkCodec::kUnimplemented; | 201 return SkCodec::kUnimplemented; |
203 } | 202 } |
204 if (dstInfo.dimensions() != this->getInfo().dimensions()) { | 203 if (dstInfo.dimensions() != this->getInfo().dimensions()) { |
205 if (!SkScaledCodec::DimensionsSupportedForSampling(this->getInfo(),
dstInfo)) { | 204 return SkCodec::kInvalidScale; |
206 return SkCodec::kInvalidScale; | |
207 } | |
208 } | 205 } |
209 | 206 |
210 if (!valid_alpha(dstInfo.alphaType(), this->getInfo().alphaType())) { | 207 if (!valid_alpha(dstInfo.alphaType(), this->getInfo().alphaType())) { |
211 return SkCodec::kInvalidConversion; | 208 return SkCodec::kInvalidConversion; |
212 } | 209 } |
213 | 210 |
214 // Fill in the color table | 211 // Fill in the color table |
215 setup_color_table(dstInfo.colorType(), inputColorTable, inputColorCount)
; | 212 setup_color_table(dstInfo.colorType(), inputColorTable, inputColorCount)
; |
216 | 213 |
217 // Copy the color table to a pointer that can be owned by the scanline d
ecoder | 214 // Copy the color table to a pointer that can be owned by the scanline d
ecoder |
218 if (kIndex_8_SkColorType == dstInfo.colorType()) { | 215 if (kIndex_8_SkColorType == dstInfo.colorType()) { |
219 fColorTable.reset(SkNEW_ARGS(SkColorTable, (inputColorTable, 2))); | 216 fColorTable.reset(SkNEW_ARGS(SkColorTable, (inputColorTable, 2))); |
220 } | 217 } |
221 | 218 |
222 // Initialize the swizzler | 219 // Initialize the swizzler |
223 fSwizzler.reset(fCodec->initializeSwizzler(dstInfo, | 220 fSwizzler.reset(fCodec->initializeSwizzler(dstInfo, |
224 get_color_ptr(fColorTable.get()), options)); | 221 get_color_ptr(fColorTable.get()), options)); |
225 if (NULL == fSwizzler.get()) { | 222 if (NULL == fSwizzler.get()) { |
226 return SkCodec::kInvalidConversion; | 223 return SkCodec::kInvalidInput; |
227 } | 224 } |
228 | 225 |
229 return SkCodec::kSuccess; | 226 return SkCodec::kSuccess; |
230 } | 227 } |
231 | 228 |
232 SkEncodedFormat onGetEncodedFormat() const { | |
233 return kWBMP_SkEncodedFormat; | |
234 } | |
235 | |
236 private: | 229 private: |
237 SkAutoTDelete<SkWbmpCodec> fCodec; | 230 SkAutoTDelete<SkWbmpCodec> fCodec; |
238 SkAutoTUnref<SkColorTable> fColorTable; | 231 SkAutoTUnref<SkColorTable> fColorTable; |
239 SkAutoTDelete<SkSwizzler> fSwizzler; | 232 SkAutoTDelete<SkSwizzler> fSwizzler; |
240 SkAutoTMalloc<uint8_t> fSrcBuffer; | 233 SkAutoTMalloc<uint8_t> fSrcBuffer; |
241 | 234 |
242 typedef SkScanlineDecoder INHERITED; | 235 typedef SkScanlineDecoder INHERITED; |
243 }; | 236 }; |
244 | 237 |
245 SkScanlineDecoder* SkWbmpCodec::NewSDFromStream(SkStream* stream) { | 238 SkScanlineDecoder* SkWbmpCodec::NewSDFromStream(SkStream* stream) { |
246 SkAutoTDelete<SkWbmpCodec> codec(static_cast<SkWbmpCodec*>( | 239 SkAutoTDelete<SkWbmpCodec> codec(static_cast<SkWbmpCodec*>( |
247 SkWbmpCodec::NewFromStream(stream))); | 240 SkWbmpCodec::NewFromStream(stream))); |
248 if (!codec) { | 241 if (!codec) { |
249 return NULL; | 242 return NULL; |
250 } | 243 } |
251 | 244 |
252 // Return the new scanline decoder | 245 // Return the new scanline decoder |
253 return SkNEW_ARGS(SkWbmpScanlineDecoder, (codec.detach())); | 246 return SkNEW_ARGS(SkWbmpScanlineDecoder, (codec.detach())); |
254 } | 247 } |
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