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* Copyright 2019 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef GrDataUtils_DEFINED
#define GrDataUtils_DEFINED
#include "include/core/SkColor.h"
#include "include/private/GrTypesPriv.h"
#include "src/gpu/GrColorInfo.h"
#include "src/gpu/GrSwizzle.h"
class GrImageInfo;
// Returns a value that can be used to set rowBytes for a transfer function.
size_t GrCompressedRowBytes(SkImage::CompressionType, int w);
// Return the pixel dimensions of a compressed texture. The topmost levels
// of a compressed mipmapped texture (i.e., 1x1 or 2x2) still occupy a full
// block and thus objectively take up more pixels (e.g., 4x4 pixels for ETC1).
SkISize GrCompressedDimensions(SkImage::CompressionType, SkISize baseDimensions);
// Compute the size of the buffer required to hold all the mipLevels of the specified type
// of data when all rowBytes are tight.
// Note there may still be padding between the mipLevels to meet alignment requirements.
size_t GrComputeTightCombinedBufferSize(size_t bytesPerPixel, SkISize baseDimensions,
SkTArray<size_t>* individualMipOffsets, int mipLevelCount);
void GrFillInCompressedData(SkImage::CompressionType, SkISize dimensions, GrMipmapped, char* dest,
const SkColor4f& color);
// Swizzle param is applied after loading and before converting from srcInfo to dstInfo.
bool GrConvertPixels(const GrImageInfo& dstInfo, void* dst, size_t dstRB,
const GrImageInfo& srcInfo, const void* src, size_t srcRB,
bool flipY = false);
/** Clears the dst image to a constant color. */
bool GrClearImage(const GrImageInfo& dstInfo, void* dst, size_t dstRB, SkColor4f color);
* BC1 compress an image that contains only either opaque black or transparent black and one
* other color.
* opaque pixmaps -> kBC1_RGB8_UNORM
* transparent pixmaps -> kBC1_RGBA8_UNORM
void GrTwoColorBC1Compress(const SkPixmap& pixmap, SkColor otherColor, char* dstPixels);