| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <meta name="viewport" content="initial-scale=1"> |
| <title>WebGL Canvas Save/Copy Image Test</title> |
| <style type="text/css"> |
| .nomargin { |
| margin: 0px auto; |
| } |
| </style> |
| <script> |
| let g_swapsBeforeAck = 15; |
| |
| function waitForFinish() |
| { |
| if (g_swapsBeforeAck == 0) { |
| sendResult("SUCCESS"); |
| } else { |
| g_swapsBeforeAck--; |
| window.requestAnimationFrame(waitForFinish); |
| } |
| } |
| |
| function sendResult(status) { |
| if (domAutomationController) { |
| domAutomationController.send(status); |
| } else { |
| console.log(status); |
| } |
| } |
| |
| function main() |
| { |
| let canvas = document.getElementById("c"); |
| let gl = canvas.getContext("webgl"); |
| if (!gl) { |
| sendResult("FAILURE", "WebGL context not supported"); |
| return; |
| } |
| |
| // Diagonally opposite green and blue box, over red box to test correctness |
| // w.r.t. to both vertical and horizontal flips. |
| gl.scissor(0, 0, 100, 100); |
| gl.enable(gl.SCISSOR_TEST); |
| gl.clearColor(1, 0, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| gl.scissor(0, 50, 50, 50); |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| gl.scissor(50, 0, 50, 50); |
| gl.clearColor(0, 0, 1, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| let dataURL = canvas.toDataURL(); |
| |
| let image = document.getElementById("i"); |
| image.src = dataURL; |
| |
| waitForFinish(); |
| } |
| </script> |
| </head> |
| <body onload="main()" class="nomargin" style="display:inline-flex"> |
| <canvas id="c" width="100" height="100" class="nomargin" style="background-color:black"></canvas> |
| <img id="i" width="100" height="100" class="nomargin" style="background-color:black"> |
| </body> |
| </html> |
