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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 "SkPngChunkReader.h" | 10 #include "SkPngChunkReader.h" |
11 #include "SkEncodedFormat.h" | 11 #include "SkEncodedFormat.h" |
12 #include "SkImageInfo.h" | 12 #include "SkImageInfo.h" |
13 #include "SkRefCnt.h" | 13 #include "SkRefCnt.h" |
14 #include "SkSwizzler.h" | 14 #include "SkSwizzler.h" |
15 | 15 |
16 #include "png.h" | 16 #include "png.h" |
17 | 17 |
18 class SkStream; | 18 class SkStream; |
19 | 19 |
20 class SkPngCodec : public SkCodec { | 20 class SkPngCodec : public SkCodec { |
21 public: | 21 public: |
22 static bool IsPng(SkStream*); | 22 static bool IsPng(const char*, size_t); |
23 | 23 |
24 // Assume IsPng was called and returned true. | 24 // Assume IsPng was called and returned true. |
25 static SkCodec* NewFromStream(SkStream*, SkPngChunkReader* = NULL); | 25 static SkCodec* NewFromStream(SkStream*, SkPngChunkReader* = NULL); |
26 | 26 |
27 virtual ~SkPngCodec(); | 27 virtual ~SkPngCodec(); |
28 | 28 |
29 protected: | 29 protected: |
30 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMCo
lor*, int*, int*) | 30 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMCo
lor*, int*, int*) |
31 override; | 31 override; |
32 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } | 32 SkEncodedFormat onGetEncodedFormat() const override { return kPNG_SkEncodedF
ormat; } |
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74 SkSwizzler::SrcConfig fSrcConfig; | 74 SkSwizzler::SrcConfig fSrcConfig; |
75 const int fNumberPasses; | 75 const int fNumberPasses; |
76 int fBitDepth; | 76 int fBitDepth; |
77 AlphaState fAlphaState; | 77 AlphaState fAlphaState; |
78 | 78 |
79 bool decodePalette(bool premultiply, int* ctableCount); | 79 bool decodePalette(bool premultiply, int* ctableCount); |
80 void destroyReadStruct(); | 80 void destroyReadStruct(); |
81 | 81 |
82 typedef SkCodec INHERITED; | 82 typedef SkCodec INHERITED; |
83 }; | 83 }; |
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