1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/rendering/more-than-65536-indices.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,94 @@
1.4 +<!--
1.5 +Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.6 +Use of this source code is governed by a BSD-style license that can be
1.7 +found in the LICENSE file.
1.8 + -->
1.9 +<!DOCTYPE html>
1.10 +<html>
1.11 +<head>
1.12 +<meta charset="utf-8">
1.13 +<title>WebGL More than 65536 indices.</title>
1.14 +<link rel="stylesheet" href="../../resources/js-test-style.css"/>
1.15 +<script src="../../resources/js-test-pre.js"></script>
1.16 +<script src="../resources/webgl-test.js"> </script>
1.17 +<script src="../resources/webgl-test-utils.js"> </script>
1.18 +</head>
1.19 +<body>
1.20 +<canvas id="example" width="40" height="40" style="width: 40px; height: 40px;"></canvas>
1.21 +<div id="description"></div>
1.22 +<div id="console"></div>
1.23 +<script id="vs" type="text/something-not-javascript">
1.24 +attribute vec4 vPosition;
1.25 +attribute vec4 vColor;
1.26 +varying vec4 color;
1.27 +void main() {
1.28 + gl_Position = vPosition;
1.29 + color = vColor;
1.30 +}
1.31 +</script>
1.32 +<script id="fs" type="text/something-not-javascript">
1.33 +precision mediump float;
1.34 +varying vec4 color;
1.35 +void main() {
1.36 + gl_FragColor = color;
1.37 +}
1.38 +</script>
1.39 +<script>
1.40 +description("checks that rendering with more than 65536 indices works.");
1.41 +var wtu = WebGLTestUtils;
1.42 +// The antialias:false context creation attribute is a concession to some older and buggier drivers.
1.43 +var gl = initWebGL("example", "vs", "fs", ["vPosition", "vColor"], [0, 0, 0, 1], 1, { antialias: false });
1.44 +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after initWebGL");
1.45 +var bufferObjects = wtu.setupUnitQuad(gl, 0, 1);
1.46 +gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[0]);
1.47 +gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
1.48 + -1,1,0, 1,1,0, -1,-1,0, 1,-1,0,
1.49 + -1,1,0, 1,1,0, -1,-1,0, 1,-1,0]), gl.STATIC_DRAW);
1.50 +gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[1]);
1.51 +gl.bufferData(gl.ARRAY_BUFFER, new Uint8Array([
1.52 + 255, 0, 0, 255,
1.53 + 255, 0, 0, 255,
1.54 + 255, 0, 0, 255,
1.55 + 255, 0, 0, 255,
1.56 + 0, 255, 0, 255,
1.57 + 0, 255, 0, 255,
1.58 + 0, 255, 0, 255,
1.59 + 0, 255, 0, 255]), gl.STATIC_DRAW);
1.60 +gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, false, 0, 0);
1.61 +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after program setup");
1.62 +gl.enable(gl.BLEND);
1.63 +gl.disable(gl.DEPTH_TEST);
1.64 +
1.65 +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating texture");
1.66 +var numQuads = Math.floor(65536 / 6) + 2;
1.67 +debug("numQuads: " + numQuads);
1.68 +debug("numPoints: " + numQuads * 6);
1.69 +var indexBuf = new ArrayBuffer(numQuads * 6);
1.70 +var indices = new Uint8Array(indexBuf);
1.71 +for (var ii = 0; ii < numQuads; ++ii) {
1.72 + var offset = ii * 6;
1.73 + var quad = (ii == (numQuads - 1)) ? 4 : 0;
1.74 + indices[offset + 0] = quad + 0;
1.75 + indices[offset + 1] = quad + 1;
1.76 + indices[offset + 2] = quad + 2;
1.77 + indices[offset + 3] = quad + 2;
1.78 + indices[offset + 4] = quad + 1;
1.79 + indices[offset + 5] = quad + 3;
1.80 +}
1.81 +var indexBuffer = gl.createBuffer();
1.82 +gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
1.83 +gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
1.84 +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting up indices");
1.85 +gl.drawElements(gl.TRIANGLES, numQuads * 6, gl.UNSIGNED_BYTE, 0);
1.86 +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after drawing");
1.87 +wtu.checkCanvas(gl, [0, 255, 0, 255], "Should be green.");
1.88 +
1.89 +successfullyParsed = true;
1.90 +</script>
1.91 +
1.92 +<script>finishTest();</script>
1.93 +
1.94 +</body>
1.95 +</html>
1.96 +
1.97 +
