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comparison: content/canvas/test/webgl-conformance/misc/program-test-1.html
content/canvas/test/webgl-conformance/misc/program-test-1.html
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| 1 <!-- | |
| 2 Copyright (c) 2010 Mozilla Foundation. 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 <!-- This is a visual test that programs must have both a vertex and | |
| 11 fragment shader attached; the fixed function pipeline on the | |
| 12 desktop must remain disabled. --> | |
| 13 <script type="text/javascript"> | |
| 14 function log() { | |
| 15 var s = ""; | |
| 16 for (var i = 0; i < arguments.length; ++i) { | |
| 17 s += arguments[i] + " "; | |
| 18 } | |
| 19 | |
| 20 document.getElementById("log").innerHTML += s + "<br>"; | |
| 21 } | |
| 22 | |
| 23 function go() { | |
| 24 var gl = document.getElementById("c").getContext("experimental-webgl"); | |
| 25 | |
| 26 gl.clearColor(0.0, 0.0, 0.0, 0.0); | |
| 27 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 28 | |
| 29 var vs = gl.createShader(gl.VERTEX_SHADER); | |
| 30 gl.shaderSource(vs, "attribute vec4 aVertex; attribute vec4 aColor; varying vec4 vColor; void main() { vColor = aColor; gl_Position = aVertex; }"); | |
| 31 gl.compileShader(vs); | |
| 32 | |
| 33 var fs = gl.createShader(gl.FRAGMENT_SHADER); | |
| 34 gl.shaderSource(fs, "precision mediump float; varying vec4 vColor; void main() { gl_FragColor = vColor; }"); | |
| 35 gl.compileShader(fs); | |
| 36 | |
| 37 var prog = gl.createProgram(); | |
| 38 gl.attachShader(prog, vs); | |
| 39 // don't attach a fragment shader -- may use fixed pipeline on desktop if the implementation doesn't check! | |
| 40 //gl.attachShader(prog, fs); | |
| 41 | |
| 42 gl.bindAttribLocation(prog, 0, "aVertex"); | |
| 43 gl.bindAttribLocation(prog, 1, "aColor"); | |
| 44 | |
| 45 gl.linkProgram(prog); | |
| 46 | |
| 47 var vbuf = gl.createBuffer(); | |
| 48 gl.bindBuffer(gl.ARRAY_BUFFER, vbuf); | |
| 49 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ | |
| 50 -1.0, -1.0, 0.0, 1.0, | |
| 51 -1.0, 1.0, 0.0, 1.0, | |
| 52 1.0, -1.0, 0.0, 1.0, | |
| 53 1.0, 1.0, 0.0, 1.0]), gl.STATIC_DRAW); | |
| 54 gl.vertexAttribPointer(0, 4, gl.FLOAT, false, 0, 0); | |
| 55 | |
| 56 var cbuf = gl.createBuffer(); | |
| 57 gl.bindBuffer(gl.ARRAY_BUFFER, cbuf); | |
| 58 gl.bufferData(gl.ARRAY_BUFFER, new Uint8Array([255, 0, 0, | |
| 59 0, 255, 0, | |
| 60 0, 0, 255, | |
| 61 255, 255, 0]), gl.STATIC_DRAW); | |
| 62 gl.vertexAttribPointer(1, 3, gl.UNSIGNED_BYTE, false, 0, 0); | |
| 63 | |
| 64 gl.enableVertexAttribArray(0); | |
| 65 gl.enableVertexAttribArray(1); | |
| 66 | |
| 67 gl.useProgram(prog); | |
| 68 | |
| 69 gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); | |
| 70 | |
| 71 log("glError", "0x" + gl.getError().toString(16)); | |
| 72 } | |
| 73 </script> | |
| 74 </head> | |
| 75 | |
| 76 <body onload="go()"> | |
| 77 <p>Should be green in the rectangle below:</p> | |
| 78 <canvas style="background: green;" id="c"></canvas> | |
| 79 <div id="log"></div> | |
| 80 </body> | |
| 81 </html> |
