1 /* 2 * Copyright 2020 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 #ifndef SkCompressedDataUtils_DEFINED 9 #define SkCompressedDataUtils_DEFINED 10 11 #include "include/core/SkImage.h" 12 #include "include/core/SkRefCnt.h" 13 #include "include/core/SkSize.h" 14 #include "include/private/SkTArray.h" 15 16 class SkBitmap; 17 class SkData; 18 SkCompressionTypeIsOpaque(SkImage::CompressionType compression)19 static constexpr bool SkCompressionTypeIsOpaque(SkImage::CompressionType compression) { 20 switch (compression) { 21 case SkImage::CompressionType::kNone: return true; 22 case SkImage::CompressionType::kETC2_RGB8_UNORM: return true; 23 case SkImage::CompressionType::kBC1_RGB8_UNORM: return true; 24 case SkImage::CompressionType::kBC1_RGBA8_UNORM: return false; 25 } 26 27 SkUNREACHABLE; 28 } 29 30 size_t SkCompressedDataSize(SkImage::CompressionType, SkISize baseDimensions, 31 SkTArray<size_t>* individualMipOffsets, bool mipMapped); 32 size_t SkCompressedBlockSize(SkImage::CompressionType type); 33 34 /** 35 * Returns the data size for the given SkImage::CompressionType 36 */ 37 size_t SkCompressedFormatDataSize(SkImage::CompressionType compressionType, 38 SkISize dimensions, bool mipMapped); 39 40 /* 41 * This method will decompress the bottommost level in 'data' into 'dst'. 42 */ 43 bool SkDecompress(sk_sp<SkData> data, 44 SkISize dimensions, 45 SkImage::CompressionType compressionType, 46 SkBitmap* dst); 47 48 #endif 49