| <!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 src="../../resources/run-after-layout-and-paint.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') == internals.getImageSourceURL(preserve_canvas3D)"); |
| debug("2) when drawingBuffer is not preserved. They must be different.") |
| shouldBeTrue("nonpreserve_canvas3D.toDataURL('image/png') != 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') == internals.getImageSourceURL(preserve_canvas3D)"); |
| debug("2) when drawingBuffer is not preserved.") |
| shouldBeTrue("nonpreserve_canvas3D.toDataURL('image/png') == internals.getImageSourceURL(nonpreserve_canvas3D)"); |
| |
| runAfterLayoutAndPaint(asyncTest); |
| } |
| |
| window.onload = function () { |
| window.requestAnimationFrame(startTestAfterFirstPaint); |
| } |
| </script> |
| </body> |
| </html> |
