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| 1 | 1 |
| 2 /* | 2 /* |
| 3 * Copyright 2007 The Android Open Source Project | 3 * Copyright 2007 The Android Open Source Project |
| 4 * | 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
| 7 */ | 7 */ |
| 8 | 8 |
| 9 | 9 |
| 10 #include "bmpdecoderhelper.h" | 10 #include "bmpdecoderhelper.h" |
| 11 #include "SkColorPriv.h" | 11 #include "SkColorPriv.h" |
| 12 #include "SkImageDecoder.h" | 12 #include "SkImageDecoder.h" |
| 13 #include "SkScaledBitmapSampler.h" | 13 #include "SkScaledBitmapSampler.h" |
| 14 #include "SkStream.h" | 14 #include "SkStream.h" |
| 15 #include "SkStreamHelpers.h" | 15 #include "SkStreamPriv.h" |
| 16 #include "SkTDArray.h" | 16 #include "SkTDArray.h" |
| 17 | 17 |
| 18 class SkBMPImageDecoder : public SkImageDecoder { | 18 class SkBMPImageDecoder : public SkImageDecoder { |
| 19 public: | 19 public: |
| 20 SkBMPImageDecoder() {} | 20 SkBMPImageDecoder() {} |
| 21 | 21 |
| 22 virtual Format getFormat() const SK_OVERRIDE { | 22 virtual Format getFormat() const SK_OVERRIDE { |
| 23 return kBMP_Format; | 23 return kBMP_Format; |
| 24 } | 24 } |
| 25 | 25 |
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| 92 bool fJustBounds; | 92 bool fJustBounds; |
| 93 }; | 93 }; |
| 94 | 94 |
| 95 bool SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) { | 95 bool SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) { |
| 96 // First read the entire stream, so that all of the data can be passed to | 96 // First read the entire stream, so that all of the data can be passed to |
| 97 // the BmpDecoderHelper. | 97 // the BmpDecoderHelper. |
| 98 | 98 |
| 99 // Allocated space used to hold the data. | 99 // Allocated space used to hold the data. |
| 100 SkAutoMalloc storage; | 100 SkAutoMalloc storage; |
| 101 // Byte length of all of the data. | 101 // Byte length of all of the data. |
| 102 const size_t length = CopyStreamToStorage(&storage, stream); | 102 const size_t length = SkCopyStreamToStorage(&storage, stream); |
| 103 if (0 == length) { | 103 if (0 == length) { |
| 104 return 0; | 104 return 0; |
| 105 } | 105 } |
| 106 | 106 |
| 107 const bool justBounds = SkImageDecoder::kDecodeBounds_Mode == mode; | 107 const bool justBounds = SkImageDecoder::kDecodeBounds_Mode == mode; |
| 108 SkBmpDecoderCallback callback(justBounds); | 108 SkBmpDecoderCallback callback(justBounds); |
| 109 | 109 |
| 110 // Now decode the BMP into callback's rgb() array [r,g,b, r,g,b, ...] | 110 // Now decode the BMP into callback's rgb() array [r,g,b, r,g,b, ...] |
| 111 { | 111 { |
| 112 image_codec::BmpDecoderHelper helper; | 112 image_codec::BmpDecoderHelper helper; |
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| 153 const int dstHeight = sampler.scaledHeight(); | 153 const int dstHeight = sampler.scaledHeight(); |
| 154 const uint8_t* srcRow = callback.rgb(); | 154 const uint8_t* srcRow = callback.rgb(); |
| 155 | 155 |
| 156 srcRow += sampler.srcY0() * srcRowBytes; | 156 srcRow += sampler.srcY0() * srcRowBytes; |
| 157 for (int y = 0; y < dstHeight; y++) { | 157 for (int y = 0; y < dstHeight; y++) { |
| 158 sampler.next(srcRow); | 158 sampler.next(srcRow); |
| 159 srcRow += sampler.srcDY() * srcRowBytes; | 159 srcRow += sampler.srcDY() * srcRowBytes; |
| 160 } | 160 } |
| 161 return true; | 161 return true; |
| 162 } | 162 } |
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