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| 1 <!-- |
| 2 |
| 3 /* |
| 4 ** Copyright (c) 2012 The Khronos Group Inc. |
| 5 ** |
| 6 ** Permission is hereby granted, free of charge, to any person obtaining a |
| 7 ** copy of this software and/or associated documentation files (the |
| 8 ** "Materials"), to deal in the Materials without restriction, including |
| 9 ** without limitation the rights to use, copy, modify, merge, publish, |
| 10 ** distribute, sublicense, and/or sell copies of the Materials, and to |
| 11 ** permit persons to whom the Materials are furnished to do so, subject to |
| 12 ** the following conditions: |
| 13 ** |
| 14 ** The above copyright notice and this permission notice shall be included |
| 15 ** in all copies or substantial portions of the Materials. |
| 16 ** |
| 17 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 20 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 21 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 22 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 23 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| 24 */ |
| 25 |
| 26 --> |
| 27 |
| 28 <!DOCTYPE html> |
| 29 <html> |
| 30 <head> |
| 31 <meta charset="utf-8"> |
| 32 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 33 <script src="../../resources/js-test-pre.js"></script> |
| 34 <script src="../resources/webgl-test.js"></script> |
| 35 <script id="vshader" type="x-shader/x-vertex"> |
| 36 attribute vec3 pos; |
| 37 attribute vec4 colorIn; |
| 38 uniform float pointSize; |
| 39 varying vec4 color; |
| 40 |
| 41 void main() |
| 42 { |
| 43 gl_PointSize = pointSize; |
| 44 color = colorIn; |
| 45 gl_Position = vec4(pos, 1.0); |
| 46 } |
| 47 </script> |
| 48 |
| 49 <script id="fshader" type="x-shader/x-fragment"> |
| 50 precision mediump float; |
| 51 varying vec4 color; |
| 52 |
| 53 void main() |
| 54 { |
| 55 gl_FragColor = color; |
| 56 } |
| 57 </script> |
| 58 </head> |
| 59 <body> |
| 60 <canvas id="testbed" width="2px" height="2px"></canvas> |
| 61 <div id="description"></div> |
| 62 <div id="console"></div> |
| 63 <script> |
| 64 description('Verify GL_VERTEX_PROGRAM_POINT_SIZE is enabled in WebGL'); |
| 65 |
| 66 var gl = initWebGL('testbed', { antialias: false }); |
| 67 shouldBeNonNull("gl"); |
| 68 var program = setupProgram(gl, 'vshader', 'fshader', ['pos', 'colorIn']); |
| 69 shouldBe('gl.getError()', 'gl.NO_ERROR'); |
| 70 |
| 71 gl.disable(gl.BLEND); |
| 72 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 73 |
| 74 // The choice of (0.4, 0.4) ensures that the centers of the surrounding |
| 75 // pixels are not contained within the point when it is of size 1, but |
| 76 // that they definitely are when it is of size 2. |
| 77 var vertices = new Float32Array([ |
| 78 0.4, 0.4, 0.0]); |
| 79 var colors = new Uint8Array([ |
| 80 255, 0, 0, 255]); |
| 81 |
| 82 var colorOffset = vertices.byteLength; |
| 83 |
| 84 var vbo = gl.createBuffer(); |
| 85 gl.bindBuffer(gl.ARRAY_BUFFER, vbo); |
| 86 gl.bufferData(gl.ARRAY_BUFFER, colorOffset + colors.byteLength, gl.STATIC_DR
AW); |
| 87 gl.bufferSubData(gl.ARRAY_BUFFER, 0, vertices); |
| 88 gl.bufferSubData(gl.ARRAY_BUFFER, colorOffset, colors); |
| 89 |
| 90 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| 91 gl.enableVertexAttribArray(0); |
| 92 gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, true, 0, colorOffset); |
| 93 gl.enableVertexAttribArray(1); |
| 94 |
| 95 var locPointSize = gl.getUniformLocation(program, 'pointSize'); |
| 96 |
| 97 shouldBe('gl.getError()', 'gl.NO_ERROR'); |
| 98 |
| 99 debug('Draw a point of size 1 and verify it does not touch any other pixels.
'); |
| 100 |
| 101 gl.uniform1f(locPointSize, 1.0); |
| 102 gl.drawArrays(gl.POINTS, 0, vertices.length / 3); |
| 103 var buf = new Uint8Array(2 * 2 * 4); |
| 104 gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| 105 shouldBe('gl.getError()', 'gl.NO_ERROR'); |
| 106 |
| 107 var index = 0; |
| 108 var correctColor; |
| 109 for (var y = 0; y < 2; ++y) { |
| 110 for (var x = 0; x < 2; ++x) { |
| 111 correctColor = [0, 0, 0]; |
| 112 if (x == 1 && y == 1) |
| 113 shouldBe('buf[index]', '255'); |
| 114 else |
| 115 shouldBe('buf[index]', '0'); |
| 116 shouldBe('buf[index + 1]', '0'); |
| 117 shouldBe('buf[index + 2]', '0'); |
| 118 index += 4; |
| 119 } |
| 120 } |
| 121 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 122 |
| 123 debug('Draw a point of size 2 and verify it fills the appropriate region.'); |
| 124 |
| 125 var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE); |
| 126 if (pointSizeRange[1] >= 2.0) { |
| 127 gl.uniform1f(locPointSize, 2.0); |
| 128 gl.drawArrays(gl.POINTS, 0, vertices.length / 3); |
| 129 gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| 130 shouldBe('gl.getError()', 'gl.NO_ERROR'); |
| 131 index = 0; |
| 132 for (var y = 0; y < 2; ++y) { |
| 133 for (var x = 0; x < 2; ++x) { |
| 134 shouldBe('buf[index]', '255'); |
| 135 shouldBe('buf[index + 1]', '0'); |
| 136 shouldBe('buf[index + 2]', '0'); |
| 137 index += 4; |
| 138 } |
| 139 } |
| 140 } |
| 141 |
| 142 successfullyParsed = true; |
| 143 </script> |
| 144 |
| 145 <script src="../../resources/js-test-post.js"></script> |
| 146 |
| 147 </body> |
| 148 </html> |
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Chromium Code Reviews
Issue 10399113:
Roll webgl conformance tests to r17874: part 2, adding r17874 (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/