19 lines
706 B
Markdown
19 lines
706 B
Markdown
|
# Dawn Internal Usages
|
||
|
|
|
||
|
|
The `dawn-internal-usages` extension allows adding additional usage which affects how a texture is allocated, but does 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);
|
||
|
|
```
|