| # Dawn Internal Usages |
| |
| The `dawn-internal-usages` feature 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); |
| ``` |
