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Update expected result of an unconfigured canvas to be transparent black #4607

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Update expected result of an unconfigured canvas to be transparent black #4607

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8 changes: 1 addition & 7 deletions src/webgpu/web_platform/canvas/readbackFromWebGPUCanvas.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -519,14 +519,8 @@ g.test('transferToImageBitmap_unconfigured_nonzero_size')
return;
}

// Since there isn't a configuration we expect the ImageBitmap to have the default alphaMode of "opaque".
// Since there isn't a configuration we expect the ImageBitmap to be transparent black.
const expected = new Uint8ClampedArray(kWidth * kHeight * 4);
for (let i = 0; i < expected.byteLength; i += 4) {
expected[i + 0] = 0;
expected[i + 1] = 0;
expected[i + 2] = 0;
expected[i + 3] = 255;
}

readbackContext.drawImage(ib, 0, 0);
readPixelsFrom2DCanvasAndCompare(t, readbackContext, expected);
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