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 case SkTextureCompressionType::kASTC_RGBA8_4x4: return false; 29 case SkTextureCompressionType::kASTC_RGBA8_6x6: return false; 30 case SkTextureCompressionType::kASTC_RGBA8_8x8: return false; 31 } 32 33 SkUNREACHABLE; 34 } 35 36 size_t SK_API SkCompressedDataSize(SkTextureCompressionType, SkISize baseDimensions, 37 skia_private::TArray<size_t>* individualMipOffsets, bool mipmapped); 38 size_t SkCompressedBlockSize(SkTextureCompressionType type); 39 40 /** 41 * Returns the data size for the given SkTextureCompressionType 42 */ 43 size_t SkCompressedFormatDataSize(SkTextureCompressionType compressionType, 44 SkISize dimensions, bool mipmapped); 45 46 /* 47 * This method will decompress the bottommost level in 'data' into 'dst'. 48 */ 49 bool SkDecompress(sk_sp<SkData> data, 50 SkISize dimensions, 51 SkTextureCompressionType compressionType, 52 SkBitmap* dst); 53 54 #endif 55