Implement depth-clip-control using depthClamp #3892
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Use depthClamp instead of VK_EXT_depth_clip_enable to implement depth-clip-control (unclipped_depth). depthClamp implicitly disables clipping and is more widely supported.
AlbinBernhardssonARM
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Checklist
cargo clippy.cargo clippy --target wasm32-unknown-unknownif applicable.Description
In Vulkan, use depthClamp instead of VK_EXT_depth_clip_enable to implement depth-clip-control (unclipped_depth). depthClamp implicitly disables clipping in addition to enabling clamping (27.4. Primitive Clipping in Vulkan spec). Enabling clamping is fine as clamping depth should always be done according to WebGPU spec (23.3.6. Fragment Processing).
depthClamp is more widely supported than VK_EXT_depth_clip_enable (85.94% vs. 38.42% according to vulkan.gpuinfo.org) so this enables depth-clip-control on more devices.
Testing
Ran shadow example.
Ran DepthClamping unit test in https://github.com/Chainsawkitten/HymnToBeauty/ (requires gfx-rs/wgpu-native#270).