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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 #include "SkTextureCompressor_ASTC.h" | 8 #include "SkTextureCompressor_ASTC.h" |
9 #include "SkTextureCompressor_Blitter.h" | 9 #include "SkTextureCompressor_Blitter.h" |
10 | 10 |
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2066 // In the case of ASTC, if everything index is zero, then the interpolated v
alue | 2066 // In the case of ASTC, if everything index is zero, then the interpolated v
alue |
2067 // will decode to zero provided we have the right header. We use the encodin
g | 2067 // will decode to zero provided we have the right header. We use the encodin
g |
2068 // from recognizing all zero blocks from above. | 2068 // from recognizing all zero blocks from above. |
2069 const int nBlocks = (width * height / 144); | 2069 const int nBlocks = (width * height / 144); |
2070 uint8_t *dst = reinterpret_cast<uint8_t *>(outputBuffer); | 2070 uint8_t *dst = reinterpret_cast<uint8_t *>(outputBuffer); |
2071 for (int i = 0; i < nBlocks; ++i) { | 2071 for (int i = 0; i < nBlocks; ++i) { |
2072 send_packing(&dst, SkTEndian_SwapLE64(0x0000000001FE000173ULL), 0); | 2072 send_packing(&dst, SkTEndian_SwapLE64(0x0000000001FE000173ULL), 0); |
2073 } | 2073 } |
2074 | 2074 |
2075 return allocator->createT< | 2075 return allocator->createT< |
2076 SkTCompressedAlphaBlitter<12, 16, CompressorASTC>, int, int, void* > | 2076 SkTCompressedAlphaBlitter<12, 16, CompressorASTC>>(width, height, output
Buffer); |
2077 (width, height, outputBuffer); | |
2078 } | 2077 } |
2079 | 2078 |
2080 void DecompressASTC(uint8_t* dst, int dstRowBytes, const uint8_t* src, | 2079 void DecompressASTC(uint8_t* dst, int dstRowBytes, const uint8_t* src, |
2081 int width, int height, int blockDimX, int blockDimY) { | 2080 int width, int height, int blockDimX, int blockDimY) { |
2082 // ASTC is encoded in what they call "raster order", so that the first | 2081 // ASTC is encoded in what they call "raster order", so that the first |
2083 // block is the bottom-left block in the image, and the first pixel | 2082 // block is the bottom-left block in the image, and the first pixel |
2084 // is the bottom-left pixel of the image | 2083 // is the bottom-left pixel of the image |
2085 dst += height * dstRowBytes; | 2084 dst += height * dstRowBytes; |
2086 | 2085 |
2087 ASTCDecompressionData data(blockDimX, blockDimY); | 2086 ASTCDecompressionData data(blockDimX, blockDimY); |
2088 for (int y = 0; y < height; y += blockDimY) { | 2087 for (int y = 0; y < height; y += blockDimY) { |
2089 dst -= blockDimY * dstRowBytes; | 2088 dst -= blockDimY * dstRowBytes; |
2090 SkColor *colorPtr = reinterpret_cast<SkColor*>(dst); | 2089 SkColor *colorPtr = reinterpret_cast<SkColor*>(dst); |
2091 for (int x = 0; x < width; x += blockDimX) { | 2090 for (int x = 0; x < width; x += blockDimX) { |
2092 read_astc_block(&data, src); | 2091 read_astc_block(&data, src); |
2093 decompress_astc_block(reinterpret_cast<uint8_t*>(colorPtr + x), dstR
owBytes, data); | 2092 decompress_astc_block(reinterpret_cast<uint8_t*>(colorPtr + x), dstR
owBytes, data); |
2094 | 2093 |
2095 // ASTC encoded blocks are 16 bytes (128 bits) large. | 2094 // ASTC encoded blocks are 16 bytes (128 bits) large. |
2096 src += 16; | 2095 src += 16; |
2097 } | 2096 } |
2098 } | 2097 } |
2099 } | 2098 } |
2100 | 2099 |
2101 } // SkTextureCompressor | 2100 } // SkTextureCompressor |
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