OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright 2015 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "SkBmpCodec.h" |
| 9 #include "SkColorTable.h" |
| 10 #include "SkImageInfo.h" |
| 11 #include "SkSwizzler.h" |
| 12 #include "SkTypes.h" |
| 13 |
| 14 /* |
| 15 * This class implements the decoding for bmp images that use "standard" modes, |
| 16 * which essentially means they do not contain bit masks or RLE codes. |
| 17 */ |
| 18 class SkBmpStandardCodec : public SkBmpCodec { |
| 19 public: |
| 20 |
| 21 /* |
| 22 * Creates an instance of the decoder |
| 23 * |
| 24 * Called only by SkBmpCodec::NewFromStream |
| 25 * There should be no other callers despite this being public |
| 26 * |
| 27 * @param srcInfo contains the source width and height |
| 28 * @param stream the stream of encoded image data |
| 29 * @param bitsPerPixel the number of bits used to store each pixel |
| 30 * @param format the format of the bmp file |
| 31 * @param numColors the number of colors in the color table |
| 32 * @param bytesPerColor the number of bytes in the stream used to represent |
| 33 each color in the color table |
| 34 * @param offset the offset of the image pixel data from the end of the |
| 35 * headers |
| 36 * @param rowOrder indicates whether rows are ordered top-down or bottom-up |
| 37 */ |
| 38 SkBmpStandardCodec(const SkImageInfo& srcInfo, SkStream* stream, |
| 39 uint16_t bitsPerPixel, uint32_t numColors, uint32_t bytesPerColor
, |
| 40 uint32_t offset, SkBmpCodec::RowOrder rowOrder, bool isIco); |
| 41 |
| 42 protected: |
| 43 |
| 44 Result onGetPixels(const SkImageInfo& dstInfo, void* dst, |
| 45 size_t dstRowBytes, const Options&, SkPMColor*, |
| 46 int*) override; |
| 47 |
| 48 private: |
| 49 |
| 50 /* |
| 51 * Creates the color table |
| 52 * Sets colorCount to the new color count if it is non-NULL |
| 53 */ |
| 54 bool createColorTable(SkAlphaType alphaType, int* colorCount); |
| 55 |
| 56 bool initializeSwizzler(const SkImageInfo& dstInfo, const Options& opts); |
| 57 |
| 58 Result decode(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes, con
st Options& opts); |
| 59 |
| 60 SkAutoTUnref<SkColorTable> fColorTable; // owned |
| 61 const uint32_t fNumColors; |
| 62 const uint32_t fBytesPerColor; |
| 63 const uint32_t fOffset; |
| 64 SkAutoTDelete<SkSwizzler> fSwizzler; |
| 65 SkAutoTDeleteArray<uint8_t> fSrcBuffer; |
| 66 const bool fInIco; |
| 67 |
| 68 typedef SkBmpCodec INHERITED; |
| 69 }; |
OLD | NEW |