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dawn-cmake/docs/features/dawn_internal_usages.md

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Add chained DawnTextureInternalUsageDescriptor This chained struct can be used for internally adding usages to Dawn textures. It will affect how the texture is allocated, but not affect frontend validation. One use case for this is so that Chromium can use an internal copyTextureToTexture command to implement copies from a WebGPU texture-backed canvas to other Web platform primitives when the swapchain texture was not explicitly created with CopySrc usage in Javascript. Usage: wgpu::DawnTextureInternalUsageDescriptor internalDesc = {}; internalDesc.internalUsage = wgpu::TextureUsage::CopySrc; wgpu::TextureDescriptor desc = {}; // set properties of desc. desc.nextInChain = &internalDesc; device.createTexture(&desc); Fixed: dawn:1027 Change-Id: Id4d08b5588d4960d150d559aa11502c69f40a674 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/58140 Commit-Queue: Austin Eng <enga@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2021-07-27 19:59:58 +00:00
# Dawn Internal Usages
Rename "extension" to "feature" This CL renames "extension" to "feature" to follow WebGPU. It still supports both. A future Chromium CL will pick this change, then all "extension" occurrences will be removed. Change-Id: I070e32d7ae042f9b846df01f200b39f6741a0a14 Bug: dawn:1149 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/65664 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
2021-10-04 11:30:02 +00:00
The `dawn-internal-usages` feature allows adding additional usage which affects how a texture is allocated, but does not affect frontend validation.
Add chained DawnTextureInternalUsageDescriptor This chained struct can be used for internally adding usages to Dawn textures. It will affect how the texture is allocated, but not affect frontend validation. One use case for this is so that Chromium can use an internal copyTextureToTexture command to implement copies from a WebGPU texture-backed canvas to other Web platform primitives when the swapchain texture was not explicitly created with CopySrc usage in Javascript. Usage: wgpu::DawnTextureInternalUsageDescriptor internalDesc = {}; internalDesc.internalUsage = wgpu::TextureUsage::CopySrc; wgpu::TextureDescriptor desc = {}; // set properties of desc. desc.nextInChain = &internalDesc; device.createTexture(&desc); Fixed: dawn:1027 Change-Id: Id4d08b5588d4960d150d559aa11502c69f40a674 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/58140 Commit-Queue: Austin Eng <enga@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2021-07-27 19:59:58 +00:00
One use case for this is so that Chromium can use an internal copyTextureToTexture command to implement copies from a WebGPU texture-backed canvas to other Web platform primitives when the swapchain texture was not explicitly created with CopySrc usage in Javascript.
```
Usage:
wgpu::DawnTextureInternalUsageDescriptor internalDesc = {};
internalDesc.internalUsage = wgpu::TextureUsage::CopySrc;
wgpu::TextureDescriptor desc = {};
// set properties of desc.
desc.nextInChain = &internalDesc;
device.createTexture(&desc);
```