diff options
Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.blending.html')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.blending.html | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.blending.html b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.blending.html new file mode 100644 index 0000000000..71414b4b37 --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.blending.html @@ -0,0 +1,38 @@ +<!DOCTYPE html> +<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> +<link rel="match" href="2d.layer.global-states.alpha.blending-expected.html"> +<title>Canvas test: 2d.layer.global-states.alpha.blending</title> +<h1>2d.layer.global-states.alpha.blending</h1> +<p class="desc">Checks that layers correctly use global render states.</p> +<canvas id="canvas" width="200" height="200"> + <p class="fallback">FAIL (fallback content)</p> +</canvas> +<script> + const canvas = new OffscreenCanvas(200, 200); + const ctx = canvas.getContext('2d'); + + ctx.fillStyle = 'rgba(0, 0, 255, 1)'; + + var circle = new Path2D(); + circle.arc(90, 90, 45, 0, 2 * Math.PI); + ctx.fill(circle); + + ctx.globalAlpha = 0.6; + ctx.globalCompositeOperation = 'multiply'; + + ctx.beginLayer(); + + // Enable compositing in the layer to validate that draw calls in the layer + // won't individually composite with the background. + ctx.globalCompositeOperation = 'screen'; + + ctx.fillStyle = 'rgba(225, 0, 0, 1)'; + ctx.fillRect(50, 50, 75, 50); + ctx.fillStyle = 'rgba(0, 255, 0, 1)'; + ctx.fillRect(70, 70, 75, 50); + + ctx.endLayer(); + + const outputCanvas = document.getElementById("canvas"); + outputCanvas.getContext('2d').drawImage(canvas, 0, 0); +</script> |