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| 1 /* | 1 /* |
| 2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 #ifndef SkTextureCompressor_DEFINED | 8 #ifndef SkTextureCompressor_DEFINED |
| 9 #define SkTextureCompressor_DEFINED | 9 #define SkTextureCompressor_DEFINED |
| 10 | 10 |
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| 48 kLast_Format = kASTC_12x12_Format | 48 kLast_Format = kASTC_12x12_Format |
| 49 }; | 49 }; |
| 50 static const int kFormatCnt = kLast_Format + 1; | 50 static const int kFormatCnt = kLast_Format + 1; |
| 51 | 51 |
| 52 // Returns the size of the compressed data given the width, height, and | 52 // Returns the size of the compressed data given the width, height, and |
| 53 // desired compression format. If the width and height are not an appropriat
e | 53 // desired compression format. If the width and height are not an appropriat
e |
| 54 // multiple of the block size, then this function returns an error (-1). | 54 // multiple of the block size, then this function returns an error (-1). |
| 55 int GetCompressedDataSize(Format fmt, int width, int height); | 55 int GetCompressedDataSize(Format fmt, int width, int height); |
| 56 | 56 |
| 57 // Returns an SkData holding a blob of compressed data that corresponds | 57 // Returns an SkData holding a blob of compressed data that corresponds |
| 58 // to the bitmap. If the bitmap colorType cannot be compressed using the | 58 // to the pixmap. If the pixmap colorType cannot be compressed using the |
| 59 // associated format, then we return NULL. The caller is responsible for | 59 // associated format, then we return NULL. The caller is responsible for |
| 60 // calling unref() on the returned data. | 60 // calling unref() on the returned data. |
| 61 SkData* CompressBitmapToFormat(const SkBitmap& bitmap, Format format); | 61 SkData* CompressBitmapToFormat(const SkPixmap&, Format format); |
| 62 | 62 |
| 63 // Compresses the given src data into dst. The src data is assumed to be | 63 // Compresses the given src data into dst. The src data is assumed to be |
| 64 // large enough to hold width*height pixels. The dst data is expected to | 64 // large enough to hold width*height pixels. The dst data is expected to |
| 65 // be large enough to hold the compressed data according to the format. | 65 // be large enough to hold the compressed data according to the format. |
| 66 bool CompressBufferToFormat(uint8_t* dst, const uint8_t* src, SkColorType sr
cColorType, | 66 bool CompressBufferToFormat(uint8_t* dst, const uint8_t* src, SkColorType sr
cColorType, |
| 67 int width, int height, size_t rowBytes, Format f
ormat, | 67 int width, int height, size_t rowBytes, Format f
ormat, |
| 68 bool opt = true /* Use optimization if available
*/); | 68 bool opt = true /* Use optimization if available
*/); |
| 69 | 69 |
| 70 // Decompresses the given src data from the format specified into the | 70 // Decompresses the given src data from the format specified into the |
| 71 // destination buffer. The width and height of the data passed corresponds | 71 // destination buffer. The width and height of the data passed corresponds |
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| 109 // Returns the desired dimensions of the block size for the given format. Th
ese dimensions | 109 // Returns the desired dimensions of the block size for the given format. Th
ese dimensions |
| 110 // don't necessarily correspond to the specification's dimensions, since the
re may | 110 // don't necessarily correspond to the specification's dimensions, since the
re may |
| 111 // be specialized algorithms that operate on multiple blocks at once. If the | 111 // be specialized algorithms that operate on multiple blocks at once. If the |
| 112 // flag 'matchSpec' is true, then the actual dimensions from the specificati
on are | 112 // flag 'matchSpec' is true, then the actual dimensions from the specificati
on are |
| 113 // returned. If the flag is false, then these dimensions reflect the appropr
iate operable | 113 // returned. If the flag is false, then these dimensions reflect the appropr
iate operable |
| 114 // dimensions of the compression functions. | 114 // dimensions of the compression functions. |
| 115 void GetBlockDimensions(Format format, int* dimX, int* dimY, bool matchSpec
= false); | 115 void GetBlockDimensions(Format format, int* dimX, int* dimY, bool matchSpec
= false); |
| 116 } | 116 } |
| 117 | 117 |
| 118 #endif | 118 #endif |
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