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content / test / data / gpu / offscreencanvas_imagebitmap_uses_overlay.html [blame]
<!DOCTYPE HTML>
<html>
<head>
<title>Canvas Uses CALayerOverlay Test</title>
<script>
// '--enable-gpu-benchmarking' is required for this test.
// Diagnostics:
// * Page is blank: something fundamental is broken with workers,
// OffscreenCanvas, ImageBitmap, or ImageBitmapRendering context.
// Check the console output.
// * Black square: You probably forgot to run with the
// --enable-gpu-benchmarking flag or
// addCoreAnimationStatusEventListener failed for some reason.
// * Red square: Test failed, CALayerOverlay is not being used.
// * Green square: Test passed, CALayerOverlay is being used.
// * None of the above: You're in big trouble!
async function main() {
const canvas = document.getElementById('canvas');
const context = canvas.getContext('bitmaprenderer');
const bg_canvas = new OffscreenCanvas(canvas.width, canvas.height);
const bg_ctx = bg_canvas.getContext('2d');
bg_ctx.clearRect(0, 0, canvas.width, canvas.height);
bg_ctx.fillStyle = "Black";
bg_ctx.fillRect(0, 0, 100, 100);
const image1 = await createImageBitmap(bg_canvas);
context.transferFromImageBitmap(image1);
async function errorCodeHandler(errorCode) {
// gfx::kCALayerSuccess = 0
bg_ctx.clearRect(0, 0, canvas.width, canvas.height);
if (errorCode == 0) {
console.log("CALayerOverlay is being used");
bg_ctx.fillStyle = "DarkGreen";
if (window.domAutomationController) {
window.domAutomationController.send("SUCCESS");
}
} else {
console.log("CALayerOverlay is not used. Error code:" , errorCode);
bg_ctx.fillStyle = "Red";
if (window.domAutomationController) {
window.domAutomationController.send("FAILED");
}
}
bg_ctx.fillRect(0, 0, 100, 100);
const image = await createImageBitmap(bg_canvas);
context.transferFromImageBitmap(image);
}
async function draw() {
if (!chrome.gpuBenchmarking.addCoreAnimationStatusEventListener(errorCodeHandler)) {
console.log("addCoreAnimationStatusEventListener fails!");
if (window.domAutomationController) {
window.domAutomationController.send("FAILED");
}
}
}
window.requestAnimationFrame(draw);
}
</script>
</head>
<body onload="main()">
<canvas id="canvas" width="100" height="100">
</body>
</html>