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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 "SkColorTable.h" | 9 #include "SkColorTable.h" |
10 #include "SkEncodedFormat.h" | 10 #include "SkEncodedFormat.h" |
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30 static SkScanlineDecoder* NewSDFromStream(SkStream*); | 30 static SkScanlineDecoder* NewSDFromStream(SkStream*); |
31 | 31 |
32 virtual ~SkPngCodec(); | 32 virtual ~SkPngCodec(); |
33 | 33 |
34 protected: | 34 protected: |
35 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMCo
lor*, int*) | 35 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMCo
lor*, int*) |
36 override; | 36 override; |
37 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } | 37 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } |
38 bool onRewind() override; | 38 bool onRewind() override; |
39 bool onReallyHasAlpha() const override { return fReallyHasAlpha; } | 39 bool onReallyHasAlpha() const override { return fReallyHasAlpha; } |
40 | |
41 private: | 40 private: |
42 png_structp fPng_ptr; | 41 png_structp fPng_ptr; |
43 png_infop fInfo_ptr; | 42 png_infop fInfo_ptr; |
44 | 43 |
45 // These are stored here so they can be used both by normal decoding and sca
nline decoding. | 44 // These are stored here so they can be used both by normal decoding and sca
nline decoding. |
46 SkAutoTUnref<SkColorTable> fColorTable; // May be unpremul. | 45 SkAutoTUnref<SkColorTable> fColorTable; // May be unpremul. |
47 SkAutoTDelete<SkSwizzler> fSwizzler; | 46 SkAutoTDelete<SkSwizzler> fSwizzler; |
48 | 47 |
49 SkSwizzler::SrcConfig fSrcConfig; | 48 SkSwizzler::SrcConfig fSrcConfig; |
50 int fNumberPasses; | 49 int fNumberPasses; |
51 bool fReallyHasAlpha; | 50 bool fReallyHasAlpha; |
52 int fBitDepth; | 51 int fBitDepth; |
53 | 52 |
54 SkPngCodec(const SkImageInfo&, SkStream*, png_structp, png_infop, int); | 53 SkPngCodec(const SkImageInfo&, SkStream*, png_structp, png_infop, int); |
55 | 54 |
| 55 |
56 // Helper to set up swizzler and color table. Also calls png_read_update_inf
o. | 56 // Helper to set up swizzler and color table. Also calls png_read_update_inf
o. |
57 Result initializeSwizzler(const SkImageInfo& requestedInfo, const Options&, | 57 Result initializeSwizzler(const SkImageInfo& requestedInfo, const Options&, |
58 SkPMColor*, int* ctableCount); | 58 SkPMColor*, int* ctableCount); |
59 | 59 |
60 bool decodePalette(bool premultiply, int* ctableCount); | 60 bool decodePalette(bool premultiply, int* ctableCount); |
61 void destroyReadStruct(); | 61 void destroyReadStruct(); |
62 | 62 |
63 friend class SkPngScanlineDecoder; | 63 friend class SkPngScanlineDecoder; |
64 friend class SkPngInterlacedScanlineDecoder; | 64 friend class SkPngInterlacedScanlineDecoder; |
65 | 65 |
66 typedef SkCodec INHERITED; | 66 typedef SkCodec INHERITED; |
67 }; | 67 }; |
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