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| 1 <!-- | |
| 2 Copyright (c) 2011 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 <title>WebGL shader precision format test.</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="canvas" width="2" height="2" style="width: 40px; height: 40px;"></canvas> | |
| 18 <div id="description"></div> | |
| 19 <div id="console"></div> | |
| 20 <script> | |
| 21 var wtu = WebGLTestUtils; | |
| 22 description(document.title); | |
| 23 debug("Tests that WebGLShaderPrecisionFormat class and getShaderPrecisionFormat work."); | |
| 24 debug(""); | |
| 25 var gl = wtu.create3DContext("canvas"); | |
| 26 | |
| 27 function verifyShaderPrecisionFormat(shadertype, precisiontype) { | |
| 28 shouldBeTrue('gl.getShaderPrecisionFormat(' + shadertype + ', ' + | |
| 29 precisiontype + ') instanceof WebGLShaderPrecisionFormat'); | |
| 30 } | |
| 31 | |
| 32 if (gl.getShaderPrecisionFormat == null || typeof gl.getShaderPrecisionFormat != 'function') { | |
| 33 debug("getShaderPrecisionFormat() function not found."); | |
| 34 } else { | |
| 35 debug(""); | |
| 36 debug("Test that getShaderPrecisionFormat returns a WebGLShaderPrecisionFormat object."); | |
| 37 debug(""); | |
| 38 | |
| 39 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.LOW_FLOAT'); | |
| 40 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.MEDIUM_FLOAT'); | |
| 41 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.HIGH_FLOAT'); | |
| 42 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.LOW_INT'); | |
| 43 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.MEDIUM_INT'); | |
| 44 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.HIGH_INT'); | |
| 45 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.LOW_FLOAT'); | |
| 46 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.MEDIUM_FLOAT'); | |
| 47 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.HIGH_FLOAT'); | |
| 48 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.LOW_INT'); | |
| 49 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.MEDIUM_INT'); | |
| 50 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.HIGH_INT'); | |
| 51 | |
| 52 debug(""); | |
| 53 debug("Test that getShaderPrecisionFormat throws an error with invalid parameters."); | |
| 54 debug(""); | |
| 55 | |
| 56 shouldGenerateGLError(gl, gl.INVALID_ENUM, 'gl.getShaderPrecisionFormat(gl.HIGH_INT, gl.VERTEX_SHADER)'); | |
| 57 | |
| 58 debug(""); | |
| 59 debug("Test that WebGLShaderPrecisionFormat values are sensible."); | |
| 60 debug(""); | |
| 61 | |
| 62 var shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_FLOAT); | |
| 63 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 0 && shaderPrecisionFormat.rangeMin <= 128'); | |
| 64 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 0 && shaderPrecisionFormat.rangeMax <= 128'); | |
| 65 shouldBeTrue('shaderPrecisionFormat.precision >= 0 && shaderPrecisionFormat.precision <= 128'); | |
| 66 | |
| 67 debug(""); | |
| 68 debug("Test that getShaderPrecisionFormat returns the same thing every call."); | |
| 69 debug(""); | |
| 70 | |
| 71 var shaderPrecisionFormat2 = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_FLOAT); | |
| 72 shouldBeTrue('shaderPrecisionFormat.rangeMin == shaderPrecisionFormat2.rangeMin'); | |
| 73 shouldBeTrue('shaderPrecisionFormat.rangeMax == shaderPrecisionFormat2.rangeMax'); | |
| 74 shouldBeTrue('shaderPrecisionFormat.precision == shaderPrecisionFormat2.precision'); | |
| 75 } | |
| 76 | |
| 77 finishTest(); | |
| 78 </script> | |
| 79 | |
| 80 </body> | |
| 81 </html> | |
| 82 | |
| 83 |
