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| ** Copyright (c) 2014 The Khronos Group Inc. |
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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL Scissor Canvas Dimensions Test</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 #000; |
| width: 64px; |
| height: 64px; |
| } |
| </style> |
| </head> |
| <body> |
| <canvas id="canvas1" width="16" height="16"> </canvas> |
| <canvas id="canvas2" width="16" height="16"> </canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("Check that scissoring is initially disabled and that the scissor rect does not change when canvas size changes."); |
| |
| var wtu = WebGLTestUtils; |
| |
| function testInit(canvas, attribs) { |
| var gl = wtu.create3DContext(canvas, attribs); |
| if (!gl) { |
| testFailed("context does not exist"); |
| return; |
| } |
| debug("Testing that scissor test is initially disabled"); |
| // Setting the scissor rect should have no effect on drawing. |
| gl.scissor(0, 0, 1, 1); |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors"); |
| wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, [0, 255, 0, 255], "whole canvas should be green"); |
| } |
| |
| function testCanvasSizeChange(canvas, attribs) { |
| var gl = wtu.create3DContext(canvas, attribs); |
| if (!gl) { |
| testFailed("context does not exist"); |
| return; |
| } |
| debug("Testing that scissor rect dimensions do not change if the canvas is resized."); |
| canvas.width = 32; |
| canvas.height = 32; |
| gl.viewport(0, 0, 32, 32); |
| gl.enable(gl.SCISSOR_TEST); |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors"); |
| wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0, 255, 0, 255], "area inside scissor should be green"); |
| wtu.checkCanvasRect(gl, 0, 16, 32, 16, [0, 0, 0, 0], "area outside scissor should be black"); |
| wtu.checkCanvasRect(gl, 16, 0, 16, 16, [0, 0, 0, 0], "area outside scissor should be black"); |
| } |
| |
| testInit(document.getElementById("canvas1"), {antialias: false}); |
| debug(""); |
| testCanvasSizeChange(document.getElementById("canvas2"), {antialias: false}); |
| |
| var successfullyParsed = true; |
| |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |
