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/SkRefCnt.h" 12 #include "include/core/SkTextureCompressionType.h" 13 #include "include/private/base/SkAssert.h" 14 #include "include/private/base/SkTArray.h" 15 16 #include <cstddef> 17 18 class SkBitmap; 19 class SkData; 20 struct SkISize; 21 SkTextureCompressionTypeIsOpaque(SkTextureCompressionType compression)22static constexpr bool SkTextureCompressionTypeIsOpaque(SkTextureCompressionType compression) { 23 switch (compression) { 24 case SkTextureCompressionType::kNone: return true; 25 case SkTextureCompressionType::kETC2_RGB8_UNORM: return true; 26 case SkTextureCompressionType::kBC1_RGB8_UNORM: return true; 27 case SkTextureCompressionType::kBC1_RGBA8_UNORM: return false; 28 } 29 30 SkUNREACHABLE; 31 } 32 33 size_t SkCompressedDataSize(SkTextureCompressionType, SkISize baseDimensions, 34 skia_private::TArray<size_t>* individualMipOffsets, bool mipmapped); 35 size_t SkCompressedBlockSize(SkTextureCompressionType type); 36 37 /** 38 * Returns the data size for the given SkTextureCompressionType 39 */ 40 size_t SkCompressedFormatDataSize(SkTextureCompressionType compressionType, 41 SkISize dimensions, bool mipmapped); 42 43 /* 44 * This method will decompress the bottommost level in 'data' into 'dst'. 45 */ 46 bool SkDecompress(sk_sp<SkData> data, 47 SkISize dimensions, 48 SkTextureCompressionType compressionType, 49 SkBitmap* dst); 50 51 #endif 52