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<!DOCTYPE html>
<body>
<p>
Test creating an ImageBitmap from the transferToImageBitmap of a webgl OffscreenCanvas, and then
transferred to an ImageBitmapRenderingContext.
</p>
<canvas id="canvas" width="300" height="300"></canvas>
</body>
<script>
function drawSquares(ctx) {
ctx.enable(ctx.SCISSOR_TEST);
ctx.scissor(0, 150, 150, 150);
ctx.clearColor(1, 0, 0, 1);
ctx.clear(ctx.COLOR_BUFFER_BIT);
ctx.scissor(150, 150, 300, 150);
ctx.clearColor(0, 1, 0, 1);
ctx.clear(ctx.COLOR_BUFFER_BIT);
ctx.scissor(0, 0, 150, 150);
ctx.clearColor(0, 0, 1, 1);
ctx.clear(ctx.COLOR_BUFFER_BIT);
}
async function runTest() {
const canvas = document.getElementById('canvas');
canvas.width = 300;
canvas.height = 300;
const ctx = canvas.getContext('webgl');
drawSquares(ctx);
}
runTest();
</script>
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