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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Check that ANGLE_instanced_arrays state does not leak to browser</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"></script> |
| <style> |
| canvas { |
| border: 1px solid black; |
| } |
| .correct { |
| border: 1px solid black; |
| background-color: #00ff00; |
| } |
| </style> |
| </head> |
| <body> |
| <pre> |
| This test must be run manually. |
| |
| This test tests that leaving state for ANGLE_instanced_arrays with non-default values at the |
| end of rendering does not interfere with proper compositing of results. |
| Failures seen on Linux and Mac with Chrome 32. |
| See http://crbug.com/304927 for more info. |
| |
| You should see a <span class="correct">green rectangle</span> |
| with black a outline on success. Briefly flashing red is normal. |
| </pre> |
| <canvas id='c'></canvas> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| var c = document.getElementById("c"); |
| // The bug has only been seen with preserveDrawingBuffer=true. |
| var gl = wtu.create3DContext(c, { preserveDrawingBuffer: true }); |
| var ext = wtu.getExtensionWithKnownPrefixes(gl, "ANGLE_instanced_arrays"); |
| var frame = 0; |
| function render() { |
| var RED_FRAMES = 3; |
| if (frame < RED_FRAMES) { |
| // Draw N frames red, leaving the vertex divisor to 0 after each call. |
| gl.clearColor(1,0,0,1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.requestAnimFrame(render); |
| } else { |
| // Draw 2 more times in green, setting the divisor to 1 afterward. |
| gl.clearColor(0,1,0,1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| if (frame - RED_FRAMES < 2) { |
| wtu.requestAnimFrame(render); |
| } else { |
| finishTest(); |
| } |
| // Leave attrib 0 set with a divisor of 1 before returning to browser. |
| if (ext) { |
| ext.vertexAttribDivisorANGLE(0, 1); |
| } |
| } |
| frame++; |
| } |
| |
| if (!ext) { |
| testPassed("No ANGLE_instanced_arrays support -- this is legal"); |
| } |
| wtu.requestAnimFrame(render); |
| var successfullyParsed = true; |
| </script> |
| </body> |
| </html> |
