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| 1 <!-- |
| 2 Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 3 Use of this source code is governed by a BSD-style license that can be |
| 4 found in the LICENSE file. |
| 5 --> |
| 6 <!DOCTYPE html> |
| 7 <html> |
| 8 <head> |
| 9 <meta charset="utf-8"> |
| 10 <title>WebGL More than 65536 indices.</title> |
| 11 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 12 <script src="../../resources/js-test-pre.js"></script> |
| 13 <script src="../resources/webgl-test.js"> </script> |
| 14 <script src="../resources/webgl-test-utils.js"> </script> |
| 15 </head> |
| 16 <body> |
| 17 <canvas id="example" width="40" height="40" style="width: 40px; height: 40px;"><
/canvas> |
| 18 <div id="description"></div> |
| 19 <div id="console"></div> |
| 20 <script id="vs" type="text/something-not-javascript"> |
| 21 attribute vec4 vPosition; |
| 22 attribute vec4 vColor; |
| 23 varying vec4 color; |
| 24 void main() { |
| 25 gl_Position = vPosition; |
| 26 color = vColor; |
| 27 } |
| 28 </script> |
| 29 <script id="fs" type="text/something-not-javascript"> |
| 30 precision mediump float; |
| 31 varying vec4 color; |
| 32 void main() { |
| 33 gl_FragColor = color; |
| 34 } |
| 35 </script> |
| 36 <script> |
| 37 description("checks that rendering with more than 65536 indices works."); |
| 38 var wtu = WebGLTestUtils; |
| 39 // The antialias:false context creation attribute is a concession to some older
and buggier drivers. |
| 40 var gl = initWebGL("example", "vs", "fs", ["vPosition", "vColor"], [0, 0, 0, 1],
1, { antialias: false }); |
| 41 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after initWebGL"); |
| 42 var bufferObjects = wtu.setupUnitQuad(gl, 0, 1); |
| 43 gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[0]); |
| 44 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ |
| 45 -1,1,0, 1,1,0, -1,-1,0, 1,-1,0, |
| 46 -1,1,0, 1,1,0, -1,-1,0, 1,-1,0]), gl.STATIC_DRAW); |
| 47 gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[1]); |
| 48 gl.bufferData(gl.ARRAY_BUFFER, new Uint8Array([ |
| 49 255, 0, 0, 255, |
| 50 255, 0, 0, 255, |
| 51 255, 0, 0, 255, |
| 52 255, 0, 0, 255, |
| 53 0, 255, 0, 255, |
| 54 0, 255, 0, 255, |
| 55 0, 255, 0, 255, |
| 56 0, 255, 0, 255]), gl.STATIC_DRAW); |
| 57 gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, false, 0, 0); |
| 58 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after program setup"); |
| 59 gl.enable(gl.BLEND); |
| 60 gl.disable(gl.DEPTH_TEST); |
| 61 |
| 62 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating texture"); |
| 63 var numQuads = Math.floor(65536 / 6) + 2; |
| 64 debug("numQuads: " + numQuads); |
| 65 debug("numPoints: " + numQuads * 6); |
| 66 var indexBuf = new ArrayBuffer(numQuads * 6); |
| 67 var indices = new Uint8Array(indexBuf); |
| 68 for (var ii = 0; ii < numQuads; ++ii) { |
| 69 var offset = ii * 6; |
| 70 var quad = (ii == (numQuads - 1)) ? 4 : 0; |
| 71 indices[offset + 0] = quad + 0; |
| 72 indices[offset + 1] = quad + 1; |
| 73 indices[offset + 2] = quad + 2; |
| 74 indices[offset + 3] = quad + 2; |
| 75 indices[offset + 4] = quad + 1; |
| 76 indices[offset + 5] = quad + 3; |
| 77 } |
| 78 var indexBuffer = gl.createBuffer(); |
| 79 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer); |
| 80 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW); |
| 81 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting up indices"); |
| 82 gl.drawElements(gl.TRIANGLES, numQuads * 6, gl.UNSIGNED_BYTE, 0); |
| 83 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after drawing"); |
| 84 wtu.checkCanvas(gl, [0, 255, 0, 255], "Should be green."); |
| 85 |
| 86 successfullyParsed = true; |
| 87 </script> |
| 88 |
| 89 <script src="../../resources/js-test-post.js"></script> |
| 90 |
| 91 </body> |
| 92 </html> |
| 93 |
| 94 |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/