| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Test for WebGL preserve drawing buffer being affected by scissor.</title> |
| <script src="resources/webgl_test_files/js/webgl-test-utils.js"> </script> |
| <style type=text/css> |
| body { margin: 0 } |
| </style> |
| </head> |
| <body> |
| <canvas style="width: 300px; height: 150px" id="c"></canvas> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| var c = document.getElementById("c"); |
| var scale = window.devicePixelRatio; |
| c.width = Math.floor(300. * scale); |
| c.height = Math.floor(150. * scale); |
| var gl = wtu.create3DContext(c, { preserveDrawingBuffer: true, antialias: false }); |
| gl.enable(gl.SCISSOR_TEST); |
| gl.clearColor(0., 1., 0., 1); |
| gl.scissor(0, 0, 300. * scale, 50. * scale); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| gl.scissor(125 * scale, 50 * scale, 50 * scale, 50 * scale); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| if (window.testRunner) |
| window.testRunner.dumpAsText(true); |
| </script> |
| </body> |
| </html> |
| |
