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98a7cd11af
Add clamping of the @builtin(frag_depth) output of fragment shaders using
two push constantsprovided by the outside environment. For example the
following code:
@fragment fn main() -> @builtin(frag_depth) f32 {
return 0.0;
}
Is transformed to:
enable chromium_experimental_push_constant;
struct FragDepthClampArgs {
min : f32,
max : f32,
}
var<push_constant> frag_depth_clamp_args : FragDepthClampArgs;
fn clamp_frag_depth(v : f32) -> f32 {
return clamp(v, frag_depth_clamp_args.min, frag_depth_clamp_args.max);
}
@fragment
fn main() -> @builtin(frag_depth) f32 {
return clamp_frag_depth(0.0);
}
Fixed: tint:1620
Change-Id: Id403c4813fb2698aa87630abc30d26f02d53634a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104980
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Dawn, a WebGPU implementation
Dawn is an open-source and cross-platform implementation of the work-in-progress WebGPU standard.
More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL.
Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.
Dawn provides several WebGPU building blocks:
- WebGPU C/C++ headers that applications and other building blocks use.
- The
webgpu.hversion that Dawn implements. - A C++ wrapper for the
webgpu.h.
- The
- A "native" implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
- A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
- Tint is a compiler for the WebGPU Shader Language (WGSL) that can be used in standalone to convert shaders from and to WGSL.
Helpful links:
- Dawn bug tracker if you find issues with Dawn.
- Tint bug tracker if you find issues with Tint.
- Dawn's mailing list for other discussions related to Dawn.
- Dawn's source code
- Dawn's Matrix chatroom for live discussion around contributing or using Dawn.
- WebGPU's Matrix chatroom
- Tint mirror for standalone usage.
Documentation table of content
Developer documentation:
- Dawn overview
- Building
- Contributing
- Code of Conduct
- Testing Dawn
- Debugging Dawn
- Dawn's infrastructure
- Dawn errors
- Tint experimental extensions
User documentation: (TODO, figure out what overlaps with the webgpu.h docs)
Status
(TODO)
License
Apache 2.0 Public License, please see LICENSE.
Disclaimer
This is not an officially supported Google product.