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1 // Copyright 2020 The Dawn Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //     http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef UTILS_TESTHELPERS_H_
16 #define UTILS_TESTHELPERS_H_
17 
18 #include <dawn/webgpu_cpp.h>
19 
20 namespace utils {
21 
22     struct TextureDataCopyLayout {
23         uint64_t byteLength;
24         uint64_t texelBlockCount;
25         uint32_t bytesPerRow;
26         uint32_t rowsPerImage;
27         uint32_t texelBlocksPerRow;
28         uint32_t bytesPerImage;
29         uint32_t texelBlocksPerImage;
30         wgpu::Extent3D mipSize;
31     };
32 
33     uint32_t GetMinimumBytesPerRow(wgpu::TextureFormat format, uint32_t width);
34     TextureDataCopyLayout GetTextureDataCopyLayoutForTextureAtLevel(
35         wgpu::TextureFormat format,
36         wgpu::Extent3D textureSizeAtLevel0,
37         uint32_t mipmapLevel,
38         wgpu::TextureDimension dimension = wgpu::TextureDimension::e2D,
39         uint32_t rowsPerImage = wgpu::kCopyStrideUndefined);
40 
41     uint64_t RequiredBytesInCopy(uint64_t bytesPerRow,
42                                  uint64_t rowsPerImage,
43                                  wgpu::Extent3D copyExtent,
44                                  wgpu::TextureFormat textureFormat);
45     uint64_t RequiredBytesInCopy(uint64_t bytesPerRow,
46                                  uint64_t rowsPerImage,
47                                  uint64_t widthInBlocks,
48                                  uint64_t heightInBlocks,
49                                  uint64_t depth,
50                                  uint64_t bytesPerBlock);
51 
52     uint64_t GetTexelCountInCopyRegion(uint64_t bytesPerRow,
53                                        uint64_t rowsPerImage,
54                                        wgpu::Extent3D copyExtent,
55                                        wgpu::TextureFormat textureFormat);
56 
57     // A helper function used for testing DynamicUploader offset alignment.
58     // A call of this function will do a Queue::WriteTexture with 1 byte of data,
59     // so that assuming that WriteTexture uses DynamicUploader, the first RingBuffer
60     // in it will contain 1 byte of data.
61     void UnalignDynamicUploader(wgpu::Device device);
62 
63     uint32_t VertexFormatSize(wgpu::VertexFormat format);
64 
65 }  // namespace utils
66 
67 #endif  // UTILS_TESTHELPERS_H_
68