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Side by Side Diff: src/codec/SkGifCodec.h

Issue 2445653004: Rename GIFImageReader to SkGifImageReader (Closed)
Patch Set: Remove dependent patch set Created 4 years, 1 month ago
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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 "SkCodecAnimation.h" 9 #include "SkCodecAnimation.h"
10 #include "SkColorSpace.h" 10 #include "SkColorSpace.h"
11 #include "SkColorTable.h" 11 #include "SkColorTable.h"
12 #include "SkImageInfo.h" 12 #include "SkImageInfo.h"
13 #include "SkSwizzler.h" 13 #include "SkSwizzler.h"
14 14
15 #include "GIFImageReader.h" 15 #include "SkGifImageReader.h"
16 16
17 /* 17 /*
18 * 18 *
19 * This class implements the decoding for gif images 19 * This class implements the decoding for gif images
20 * 20 *
21 */ 21 */
22 class SkGifCodec : public SkCodec { 22 class SkGifCodec : public SkCodec {
23 public: 23 public:
24 static bool IsGif(const void*, size_t); 24 static bool IsGif(const void*, size_t);
25 25
26 /* 26 /*
27 * Assumes IsGif was called and returned true 27 * Assumes IsGif was called and returned true
28 * Creates a gif decoder 28 * Creates a gif decoder
29 * Reads enough of the stream to determine the image format 29 * Reads enough of the stream to determine the image format
30 */ 30 */
31 static SkCodec* NewFromStream(SkStream*); 31 static SkCodec* NewFromStream(SkStream*);
32 32
33 // Callback for GIFImageReader when a row is available. 33 // Callback for SkGifImageReader when a row is available.
34 bool haveDecodedRow(size_t frameIndex, const unsigned char* rowBegin, 34 bool haveDecodedRow(size_t frameIndex, const unsigned char* rowBegin,
35 size_t rowNumber, unsigned repeatCount, bool writeTransp arentPixels); 35 size_t rowNumber, unsigned repeatCount, bool writeTransp arentPixels);
36 protected: 36 protected:
37 /* 37 /*
38 * Performs the full gif decode 38 * Performs the full gif decode
39 */ 39 */
40 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, 40 Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&,
41 SkPMColor*, int*, int*) override; 41 SkPMColor*, int*, int*) override;
42 42
43 SkEncodedFormat onGetEncodedFormat() const override { 43 SkEncodedFormat onGetEncodedFormat() const override {
(...skipping 76 matching lines...) Expand 10 before | Expand all | Expand 10 after
120 * it had to fill), including rows decoded by prior 120 * it had to fill), including rows decoded by prior
121 * calls to onIncrementalDecode. 121 * calls to onIncrementalDecode.
122 * @return kSuccess if the frame is complete, kIncompleteInput 122 * @return kSuccess if the frame is complete, kIncompleteInput
123 * otherwise. 123 * otherwise.
124 */ 124 */
125 Result decodeFrame(bool firstAttempt, const Options& opts, int* rowsDecoded) ; 125 Result decodeFrame(bool firstAttempt, const Options& opts, int* rowsDecoded) ;
126 126
127 /* 127 /*
128 * Creates an instance of the decoder 128 * Creates an instance of the decoder
129 * Called only by NewFromStream 129 * Called only by NewFromStream
130 * Takes ownership of the GIFImageReader 130 * Takes ownership of the SkGifImageReader
131 */ 131 */
132 SkGifCodec(const SkEncodedInfo&, const SkImageInfo&, GIFImageReader*); 132 SkGifCodec(const SkEncodedInfo&, const SkImageInfo&, SkGifImageReader*);
133 133
134 std::unique_ptr<GIFImageReader> fReader; 134 std::unique_ptr<SkGifImageReader> fReader;
135 std::unique_ptr<uint8_t[]> fTmpBuffer; 135 std::unique_ptr<uint8_t[]> fTmpBuffer;
136 std::unique_ptr<SkSwizzler> fSwizzler; 136 std::unique_ptr<SkSwizzler> fSwizzler;
137 sk_sp<SkColorTable> fCurrColorTable; 137 sk_sp<SkColorTable> fCurrColorTable;
138 // We may create a dummy table if there is not a Map in the input data. In 138 // We may create a dummy table if there is not a Map in the input data. In
139 // that case, we set this value to false, and we can skip a lot of decoding 139 // that case, we set this value to false, and we can skip a lot of decoding
140 // work (which would not be meaningful anyway). We create a "fake"/"dummy" 140 // work (which would not be meaningful anyway). We create a "fake"/"dummy"
141 // one in that case, so the client and the swizzler have something to draw. 141 // one in that case, so the client and the swizzler have something to draw.
142 bool fCurrColorTableIsReal; 142 bool fCurrColorTableIsReal;
143 // Whether the background was filled. 143 // Whether the background was filled.
144 bool fFilledBackground; 144 bool fFilledBackground;
145 // True on the first call to onIncrementalDecode. This value is passed to 145 // True on the first call to onIncrementalDecode. This value is passed to
146 // decodeFrame. 146 // decodeFrame.
147 bool fFirstCallToIncrementalDecode; 147 bool fFirstCallToIncrementalDecode;
148 148
149 void* fDst; 149 void* fDst;
150 size_t fDstRowBytes; 150 size_t fDstRowBytes;
151 151
152 // Updated inside haveDecodedRow when rows are decoded, unless we filled 152 // Updated inside haveDecodedRow when rows are decoded, unless we filled
153 // the background, in which case it is set once and left alone. 153 // the background, in which case it is set once and left alone.
154 int fRowsDecoded; 154 int fRowsDecoded;
155 155
156 typedef SkCodec INHERITED; 156 typedef SkCodec INHERITED;
157 }; 157 };
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