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Tests: Add a test for WebGL framebuffers retaining data after present

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Zaggy1024 2025-10-29 16:44:18 -07:00 committed by Jelle Raaijmakers
parent 7e20b21879
commit fae2888103
2 changed files with 35 additions and 0 deletions
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1
Tests/LibWeb/Text/expected/canvas/webgl-present-with-bound-offscreen-framebuffer.txt Normal file
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FIXME: This test relies on having a GPU backend enabled, which it is not in run-tests mode :(

34
Tests/LibWeb/Text/input/canvas/webgl-present-with-bound-offscreen-framebuffer.html Normal file
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<!DOCTYPE html>
<canvas id="canvas" width="1" height="1"></canvas>
<script src="../include.js"></script>
<script>
promiseTest(async () => {
let gl = canvas.getContext("webgl");
if (!gl) {
println("FIXME: This test relies on having a GPU backend enabled, which it is not in run-tests mode :(");
return;
}
let framebuffer = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
let texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
gl.clearColor(1, 0, 0, 1);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
await animationFrame();
await animationFrame();
const pixelBuffer = new Uint8Array(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixelBuffer);
console.log(`Framebuffer pixel value: ${pixelBuffer}`);
});
</script>
</body>
</html>