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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" |
11 #include "SkImageInfo.h" | 11 #include "SkImageInfo.h" |
12 #include "SkRefCnt.h" | 12 #include "SkRefCnt.h" |
13 #include "SkSwizzler.h" | 13 #include "SkSwizzler.h" |
14 | 14 |
15 #ifdef SKIA_PNG_PREFIXED | 15 #ifdef SKIA_PNG_PREFIXED |
16 // this must proceed png.h | 16 // this must proceed png.h |
17 #include "pngprefix.h" | 17 #include "pngprefix.h" |
18 #endif | 18 #endif |
19 #include "png.h" | 19 #include "png.h" |
20 | 20 |
21 class SkScanlineDecoder; | 21 class SkScanlineDecoder; |
22 class SkStream; | 22 class SkStream; |
23 | 23 |
24 class SkPngCodec : public SkCodec { | 24 class SkPngCodec : public SkCodec { |
25 public: | 25 public: |
26 // Assumes IsPng was called and returned true. | 26 static bool IsPng(SkStream*); |
| 27 |
| 28 // Assume IsPng was called and returned true. |
27 static SkCodec* NewFromStream(SkStream*); | 29 static SkCodec* NewFromStream(SkStream*); |
28 static bool IsPng(SkStream*); | 30 static SkScanlineDecoder* NewSDFromStream(SkStream*); |
29 | 31 |
30 virtual ~SkPngCodec(); | 32 virtual ~SkPngCodec(); |
31 | 33 |
32 protected: | 34 protected: |
33 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*) |
34 override; | 36 override; |
35 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } | 37 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } |
36 SkScanlineDecoder* onGetScanlineDecoder(const SkImageInfo& dstInfo, const Op
tions& options, | |
37 SkPMColor ctable[], int* ctableCount
) override; | |
38 bool onReallyHasAlpha() const override { return fReallyHasAlpha; } | 38 bool onReallyHasAlpha() const override { return fReallyHasAlpha; } |
39 private: | 39 private: |
40 png_structp fPng_ptr; | 40 png_structp fPng_ptr; |
41 png_infop fInfo_ptr; | 41 png_infop fInfo_ptr; |
42 | 42 |
43 // These are stored here so they can be used both by normal decoding and sca
nline decoding. | 43 // These are stored here so they can be used both by normal decoding and sca
nline decoding. |
44 SkAutoTUnref<SkColorTable> fColorTable; // May be unpremul. | 44 SkAutoTUnref<SkColorTable> fColorTable; // May be unpremul. |
45 SkAutoTDelete<SkSwizzler> fSwizzler; | 45 SkAutoTDelete<SkSwizzler> fSwizzler; |
46 | 46 |
47 SkSwizzler::SrcConfig fSrcConfig; | 47 SkSwizzler::SrcConfig fSrcConfig; |
(...skipping 11 matching lines...) Expand all Loading... |
59 // Calls rewindIfNeeded and returns true if the decoder can continue. | 59 // Calls rewindIfNeeded and returns true if the decoder can continue. |
60 bool handleRewind(); | 60 bool handleRewind(); |
61 bool decodePalette(bool premultiply, int* ctableCount); | 61 bool decodePalette(bool premultiply, int* ctableCount); |
62 void destroyReadStruct(); | 62 void destroyReadStruct(); |
63 | 63 |
64 friend class SkPngScanlineDecoder; | 64 friend class SkPngScanlineDecoder; |
65 friend class SkPngInterlacedScanlineDecoder; | 65 friend class SkPngInterlacedScanlineDecoder; |
66 | 66 |
67 typedef SkCodec INHERITED; | 67 typedef SkCodec INHERITED; |
68 }; | 68 }; |
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