Switch to Dawn's version of dawn_generator.gni. This depends on having
a file called build_overrides/dawn.gni. However, this will also enable
us to use the upstream Dawn BUILD.gn files more easily in the future.
This required adding it to compile.isolate, so the bots can pick it up.
Keeping up with Dawn:
Rename TextureFormat enums.
Rename dawn::BufferUsageBit::TransferDst -> CopyDst.
Removal of GLAD dependency.
SPIRV-Tools update.
Change-Id: Idcd5d1035ed106485dd2503b829e3c3b57a5688b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228568
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
Add Dawn repo to DEPS.
Add skia_use_dawn flag to BUILD.gn (default false).
Add Metal.framework for Mac when building for Dawn/Metal.
Add d3d12, dxgi, d3dcompiler libs when building for Dawn/D3D12.
Disable SPIRV validation when building for Dawn.
Add BUILD.gn for dawn and dawn/third_party libraries.
(Note that I had to split the declare_args() section of BUILD.gn
into two, so that I could refer to skia_use_dawn in skia_enable_spirv_validation.
If there's a better way to do this, I'm open to suggestions.)
Change-Id: I9bdaf990694f6b8bcce6b77c1a8b1620a7396e34
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225137
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>
