chromium/third_party/dawn/src/dawn/utils/TestUtils.h

// Copyright 2020 The Dawn & Tint Authors
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#ifndef SRC_DAWN_UTILS_TESTUTILS_H_
#define SRC_DAWN_UTILS_TESTUTILS_H_

#include <webgpu/webgpu_cpp.h>

#include <functional>
#include <ostream>

namespace dawn::utils {

struct RGBA8 { … };
std::ostream& operator<<(std::ostream& stream, const RGBA8& color);

struct TextureDataCopyLayout { … };

uint32_t GetMinimumBytesPerRow(wgpu::TextureFormat format, uint32_t width);
TextureDataCopyLayout GetTextureDataCopyLayoutForTextureAtLevel(
    wgpu::TextureFormat format,
    wgpu::Extent3D textureSizeAtLevel0,
    uint32_t mipmapLevel,
    wgpu::TextureDimension dimension = wgpu::TextureDimension::e2D,
    uint32_t rowsPerImage = wgpu::kCopyStrideUndefined);

uint64_t RequiredBytesInCopy(uint64_t bytesPerRow,
                             uint64_t rowsPerImage,
                             wgpu::Extent3D copyExtent,
                             wgpu::TextureFormat textureFormat);
uint64_t RequiredBytesInCopy(uint64_t bytesPerRow,
                             uint64_t rowsPerImage,
                             uint64_t widthInBlocks,
                             uint64_t heightInBlocks,
                             uint64_t depth,
                             uint64_t bytesPerBlock);

uint64_t GetTexelCountInCopyRegion(uint64_t bytesPerRow,
                                   uint64_t rowsPerImage,
                                   wgpu::Extent3D copyExtent,
                                   wgpu::TextureFormat textureFormat);

// A helper function used for testing DynamicUploader offset alignment.
// A call of this function will do a Queue::WriteTexture with 1 byte of data,
// so that assuming that WriteTexture uses DynamicUploader, the first RingBuffer
// in it will contain 1 byte of data.
void UnalignDynamicUploader(wgpu::Device device);

uint32_t VertexFormatSize(wgpu::VertexFormat format);

void RunInParallel(uint32_t numThreads,
                   const std::function<void(uint32_t)>& workerFunc,
                   const std::function<void()>& mainThreadFunc = nullptr);

}  // namespace dawn::utils

#endif  // SRC_DAWN_UTILS_TESTUTILS_H_