| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <title>Low Latency WebGL Canvas Test: Should render diagonal green and blue boxes over red background</title> |
| <style type="text/css"> |
| .nomargin { |
| margin: 0px auto; |
| } |
| </style> |
| <script> |
| let g_swapsBeforeAck = 15; |
| let g_canvas; |
| let g_gl; |
| |
| function main() |
| { |
| g_canvas = document.getElementById("c"); |
| g_gl = g_canvas.getContext("webgl", {desynchronized: true, alpha: true}); |
| requestAnimationFrame(draw); |
| } |
| |
| function draw() |
| { |
| g_gl.clearColor(0, 0, 0, 0); |
| g_gl.clear(g_gl.COLOR_BUFFER_BIT); |
| g_gl.enable(g_gl.SCISSOR_TEST); |
| g_gl.scissor(0, 0, 50, 50); |
| g_gl.clearColor(0, 1, 0, 1); |
| g_gl.clear(g_gl.COLOR_BUFFER_BIT); |
| waitForFinish(); |
| } |
| |
| function waitForFinish() |
| { |
| if (g_swapsBeforeAck == 0) { |
| domAutomationController.send("SUCCESS"); |
| } else { |
| g_swapsBeforeAck--; |
| window.requestAnimationFrame(waitForFinish); |
| } |
| } |
| </script> |
| </head> |
| <body onload="main()"> |
| <div class="nomargin" style="position: absolute; top: 0px; left: 0px; height: 100px; width: 100px; background-color: red"></div> |
| <div id="container" style="position:absolute; top:0px; left:0px"> |
| <canvas id="c" width="100" height="100" class="nomargin"></canvas> |
| </div> |
| <div class="nomargin" style="position: absolute; top: 0px; left: 50px; height: 50px; width: 50px; background-color: blue"></div> |
| </body> |
| </html> |
