diff options
Diffstat (limited to '')
-rw-r--r-- | testing/web-platform/tests/html/canvas/element/manual/context-attributes/fill_alpha_false.html | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/element/manual/context-attributes/fill_alpha_false.html b/testing/web-platform/tests/html/canvas/element/manual/context-attributes/fill_alpha_false.html new file mode 100644 index 0000000000..7872a79380 --- /dev/null +++ b/testing/web-platform/tests/html/canvas/element/manual/context-attributes/fill_alpha_false.html @@ -0,0 +1,18 @@ +<!DOCTYPE html> +<meta charset="utf-8"> +<title>CanvasRenderingContext 2D with alpha=flase, path fill with transparent color and 'copy' composite operation.</title> +<link rel="author" title="Justin Novosad" href="mailto:junov@chromium.org"> +<link rel="help" href="https://html.spec.whatwg.org/#concept-canvas-alpha"> +<link rel="match" href="fill_alpha_false-ref.html"> +<meta name="assert" content="Canvas pixels remain opaque black when filling path with tranparent pixels and 'copy' compisite op."> +<p>Test passes if a 100x100 black square is displayed below.</p> +<canvas id="c" width=100 height=100></canvas> +<script> +const ctx = document.getElementById("c").getContext("2d", {alpha: false}); +ctx.fillColor = 'red'; +ctx.fillRect(25, 25, 50, 25); // will be overwritten. +ctx.fillColor = "rgba(0, 0, 0, 0.0)"; +ctx.globalCompositeOperation = 'copy'; +ctx.rect(25, 25, 50, 50); +ctx.fill(); +</script> |