1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/limits/gl-min-uniforms.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,104 @@
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 the minimum number of uniforms are supported.</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="4" height="4" style="width: 40px; height: 30px;"></canvas>
1.21 +<div id="description"></div>
1.22 +<div id="console"></div>
1.23 +<script id="vshader" type="x-shader/x-vertex">
1.24 +#define NUM_UNIFORMS 128 // See spec
1.25 +attribute vec4 vPosition;
1.26 +uniform vec4 uni[NUM_UNIFORMS];
1.27 +varying vec4 color;
1.28 +void main()
1.29 +{
1.30 + gl_Position = vPosition;
1.31 + vec4 c = vec4(0,0,0,0);
1.32 + for (int ii = 0; ii < NUM_UNIFORMS; ++ii) {
1.33 + c += uni[ii];
1.34 + }
1.35 + color = c;
1.36 +}
1.37 +</script>
1.38 +
1.39 +<script id="fshader" type="x-shader/x-fragment">
1.40 +precision mediump float;
1.41 +varying vec4 color;
1.42 +void main()
1.43 +{
1.44 + gl_FragColor = color;
1.45 +}
1.46 +</script>
1.47 +<script id="vshader2" type="x-shader/x-vertex">
1.48 +attribute vec4 vPosition;
1.49 +void main()
1.50 +{
1.51 + gl_Position = vPosition;
1.52 +}
1.53 +</script>
1.54 +
1.55 +<script id="fshader2" type="x-shader/x-fragment">
1.56 +precision mediump float;
1.57 +#define NUM_UNIFORMS 16 // See spec
1.58 +uniform vec4 uni[NUM_UNIFORMS];
1.59 +void main()
1.60 +{
1.61 + vec4 c = vec4(0,0,0,0);
1.62 + for (int ii = 0; ii < NUM_UNIFORMS; ++ii) {
1.63 + c += uni[ii];
1.64 + }
1.65 + gl_FragColor = vec4(c.r, c.g, c.b, c.a / 120.0);
1.66 +}
1.67 +</script>
1.68 +<script>
1.69 +description(document.title);
1.70 +var wtu = WebGLTestUtils;
1.71 +var gl = wtu.create3DContext("example");
1.72 +var program = wtu.setupTexturedQuad(gl);
1.73 +
1.74 +//------------------------------------------------------------------------------
1.75 +var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['vPosition'], [0]);
1.76 +
1.77 +for (var ii = 0; ii < 128; ++ii) {
1.78 + var loc = gl.getUniformLocation(program, "uni[" + ii + "]");
1.79 + gl.uniform4f(loc, 2/256, 2/512, 2/1024, ii/8128);
1.80 +}
1.81 +
1.82 +wtu.drawQuad(gl);
1.83 +glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
1.84 +wtu.checkCanvasRect(gl, 0, 0, gl.canvas.width, gl.canvas.height, [255, 127, 64, 255], "Should render 255,127,64,32 (+/-1)", 1);
1.85 +
1.86 +//------------------------------------------------------------------------------
1.87 +var program = wtu.setupProgram(gl, ['vshader2', 'fshader2'], ['vPosition'], [0]);
1.88 +
1.89 +for (var ii = 0; ii < 16; ++ii) {
1.90 + var loc = gl.getUniformLocation(program, "uni[" + ii + "]");
1.91 + gl.uniform4f(loc, 16/2048, 16/1024, 16/512, ii);
1.92 +}
1.93 +
1.94 +glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
1.95 +wtu.drawQuad(gl);
1.96 +glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
1.97 +wtu.checkCanvasRect(gl, 0, 0, gl.canvas.width, gl.canvas.height, [32, 64, 127, 255], "Should render 32,64,127,255 (+/-1)", 1);
1.98 +
1.99 +successfullyParsed = true;
1.100 +
1.101 +</script>
1.102 +<script>finishTest();</script>
1.103 +
1.104 +</body>
1.105 +</html>
1.106 +
1.107 +
