LayoutTests/fast/canvas/webgl/canvas-to-data-url.html - Issue 749653002: WebGL: clarify which Front or Back buffer is used by each API.

Unified Diff: LayoutTests/fast/canvas/webgl/canvas-to-data-url.html

Issue 749653002: WebGL: clarify which Front or Back buffer is used by each API. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Fix bot failure, and fix existing bug of HTMLCanvasElement::imageSourceURL() Created 6 years, 1 month ago

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Index: LayoutTests/fast/canvas/webgl/canvas-to-data-url.html

diff --git a/LayoutTests/fast/canvas/webgl/canvas-to-data-url.html b/LayoutTests/fast/canvas/webgl/canvas-to-data-url.html

new file mode 100644

index 0000000000000000000000000000000000000000..20ab459ad34296635efdb664fc9f319f347225f9

--- /dev/null

+++ b/LayoutTests/fast/canvas/webgl/canvas-to-data-url.html

@@ -0,0 +1,60 @@

+<!DOCTYPE html>

+<html>

+<body>

+<canvas id="preserve-canvas3d" width="10" height="10"></canvas>

+<canvas id="nonpreserve-canvas3d" width="10" height="10"></canvas>

+<script src="../../../resources/js-test.js"></script>

+<script>

+if (window.testRunner) {

+ testRunner.dumpAsText();

+ testRunner.waitUntilDone();

+var preserve_canvas3D;

+var nonpreserve_canvas3D;

+function renderWebGL(gl) {

+ gl.clearColor(0.5, 1, 0.3, 0.1);

+ gl.clear(gl.COLOR_BUFFER_BIT);

+function asyncTest() {

+ debug("Check if back buffer (toDataURL) is equal to front buffer (getImageSourceURL) one frame after drawing webgl contents.")

+ debug("1) when drawingBuffer is preserved.")

+ shouldBeTrue("preserve_canvas3D.toDataURL('image/png') == window.internals.getImageSourceURL(preserve_canvas3D)");

+ debug("2) when drawingBuffer is not preserved. They must be different.")

+ shouldBeTrue("nonpreserve_canvas3D.toDataURL('image/png') != window.internals.getImageSourceURL(nonpreserve_canvas3D)");

+ if (window.testRunner)

+ testRunner.notifyDone();

+function startTestAfterFirstPaint() {

+ preserve_canvas3D = document.getElementById('preserve-canvas3d');

+ var preserve_gl = preserve_canvas3D.getContext('webgl', {preserveDrawingBuffer: true, premultipliedAlpha: false});

+ nonpreserve_canvas3D = document.getElementById('nonpreserve-canvas3d');

+ var nonpreserve_gl = nonpreserve_canvas3D.getContext('webgl', {preserveDrawingBuffer: false, premultipliedAlpha: false});

+ // prepare webgl contents.

+ renderWebGL(preserve_gl);

+ renderWebGL(nonpreserve_gl);

+ debug("Check if back buffer (toDataURL) is equal to front buffer (getImageSourceURL)")

+ debug("1) when drawingBuffer is preserved.")

+ shouldBeTrue("preserve_canvas3D.toDataURL('image/png') == window.internals.getImageSourceURL(preserve_canvas3D)");

+ debug("2) when drawingBuffer is not preserved.")

+ shouldBeTrue("nonpreserve_canvas3D.toDataURL('image/png') == window.internals.getImageSourceURL(nonpreserve_canvas3D)");

+ if (window.testRunner) {

+ testRunner.waitUntilDone();

+ testRunner.displayAsyncThen(asyncTest);

+ } else {

+ window.requestAnimationFrame(asyncTest);

+ }

+window.onload = function () {

+ window.requestAnimationFrame(startTestAfterFirstPaint);

+</script>

+</body>

+</html>

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