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
16class SkBitmap;
17class SkData;
18
19static 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
30size_t SkCompressedDataSize(SkImage::CompressionType, SkISize baseDimensions,
31 SkTArray<size_t>* individualMipOffsets, bool mipMapped);
32size_t SkCompressedBlockSize(SkImage::CompressionType type);
33
34/**
35 * Returns the data size for the given SkImage::CompressionType
36 */
37size_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 */
43bool SkDecompress(sk_sp<SkData> data,
44 SkISize dimensions,
45 SkImage::CompressionType compressionType,
46 SkBitmap* dst);
47
48#endif
49