tree d627b1044944a5938754a371bc0cd52fb952ffbf
parent 7e50a7fad31686d3fbd4361053d81896d1b5e9fd
author Austin Eng <enga@chromium.org> 1627415998 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1627415998 +0000

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>