Don't require GPUBufferUsage.STORAGE for GPUCommandEncoder.fillBuffer()

litherum · litherum · commit 2de05aed62ac · 2021-10-23T10:44:38.000-07:00
D3D implementations can implement this by copying from a pre-zeroed buffer.

(If the buffer just happens to also have GPUBufferUsage.STORAGE, then D3D
implementations can use ID3D12GraphicsCommandList::ClearUnorderedAccessViewUint(),
if it's faster. But it isn't necessary.)
diff --git a/spec/index.bs b/spec/index.bs
@@ -5996,7 +5996,7 @@ dictionary GPUImageCopyExternalImage {
             <div class=validusage>
                 - |this|.{{GPUCommandEncoder/[[state]]}} is {{encoder state/open}}.
                 - |destination| is [$valid to use with$] |this|.
-                - |destination|.{{GPUBuffer/[[usage]]}} contains {{GPUBufferUsage/COPY_DST}} and {{GPUBufferUsage/STORAGE}}.
+                - |destination|.{{GPUBuffer/[[usage]]}} contains {{GPUBufferUsage/COPY_DST}}.
                 - |size| is a multiple of 4.
                 - |destinationOffset| is a multiple of 4.
                 - (|destinationOffset| + |size|) does not overflow a {{GPUSize64}}.
