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Auto merge of #25831 - szeged:wgpu_read_map_async, r=jdm

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Implement mapReadAsync function of GPUBuffer

Implemented the `mapReadAsync` and fixed the `unmap` functions of `GPUBuffer`.
Added `mapped` internal slot for tracking the ArrayBuffer/Promise.
Added more states to the `GPUBufferState` enum.

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---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes addresses a part of #24706

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cc @kvark @jdm @zakorgy
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This commit is contained in:
bors-servo
2020-02-25 16:42:35 -05:00
committed by GitHub
parent cd00e57c97 2df4d9fce4
commit 6116012408
5 changed files with 253 additions and 62 deletions
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2
components/script/dom/webidls/GPUBuffer.webidl
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@@ -5,7 +5,7 @@
// https://gpuweb.github.io/gpuweb/#gpubuffer
[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
interface GPUBuffer {
// Promise<ArrayBuffer> mapReadAsync();
Promise<ArrayBuffer> mapReadAsync();
// Promise<ArrayBuffer> mapWriteAsync();
void unmap();