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| 1 <html> | |
| 2 <head> | |
| 3 <script src="../../../resources/js-test.js"></script> | |
| 4 <script src="resources/webgl-test.js"></script> | |
| 5 <script id="vshader" type="x-shader/x-vertex"> | |
| 6 attribute vec3 pos; | |
| 7 attribute vec4 colorIn; | |
| 8 uniform float pointSize; | |
| 9 varying vec4 color; | |
| 10 | |
| 11 void main() | |
| 12 { | |
| 13 gl_PointSize = pointSize; | |
| 14 color = colorIn; | |
| 15 gl_Position = vec4(pos.xyz, 3.0); | |
| 16 } | |
| 17 </script> | |
| 18 | |
| 19 <script id="fshader" type="x-shader/x-fragment"> | |
| 20 #ifdef GL_ES | |
| 21 precision mediump float; | |
| 22 #endif | |
| 23 varying vec4 color; | |
| 24 | |
| 25 void main() | |
| 26 { | |
| 27 gl_FragColor = color; | |
| 28 } | |
| 29 </script> | |
| 30 | |
| 31 <script> | |
| 32 function runTest() | |
| 33 { | |
| 34 var gl = initWebGL('testbed', 'vshader', 'fshader', ['pos', 'colorIn'], [0,
0, 0, 1], 1, { antialias: false }); | |
| 35 if (!gl) { | |
| 36 testFailed('initWebGL(..) failed'); | |
| 37 return false; | |
| 38 } | |
| 39 gl.disable(gl.BLEND); | |
| 40 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 41 | |
| 42 // The choice of (0.4, 0.4) ensures that the centers of the surrounding | |
| 43 // pixels are not contained within the point when it is of size 1, but | |
| 44 // that they definitely are when it is of size 2. | |
| 45 var vertices = new Float32Array([ | |
| 46 0.4, 0.4, 0.0]); | |
| 47 var colors = new Uint8Array([ | |
| 48 255, 0, 0, 255]); | |
| 49 | |
| 50 var colorOffset = vertices.byteLength; | |
| 51 | |
| 52 var vbo = gl.createBuffer(); | |
| 53 gl.bindBuffer(gl.ARRAY_BUFFER, vbo); | |
| 54 gl.bufferData(gl.ARRAY_BUFFER, colorOffset + colors.byteLength, gl.STATIC_DR
AW); | |
| 55 gl.bufferSubData(gl.ARRAY_BUFFER, 0, vertices); | |
| 56 gl.bufferSubData(gl.ARRAY_BUFFER, colorOffset, colors); | |
| 57 | |
| 58 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); | |
| 59 gl.enableVertexAttribArray(0); | |
| 60 gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, true, 0, colorOffset); | |
| 61 gl.enableVertexAttribArray(1); | |
| 62 | |
| 63 var locPointSize = gl.getUniformLocation(gl.program, 'pointSize'); | |
| 64 | |
| 65 debug('Draw a point of size 1 and verify it does not touch any other pixels.
'); | |
| 66 | |
| 67 gl.uniform1f(locPointSize, 1.0); | |
| 68 gl.drawArrays(gl.POINTS, 0, vertices.length / 3); | |
| 69 var buf = new Uint8Array(2 * 2 * 4); | |
| 70 gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 71 var index = 0; | |
| 72 for (var y = 0; y < 2; ++y) { | |
| 73 for (var x = 0; x < 2; ++x) { | |
| 74 var correctColor = [0, 0, 0]; | |
| 75 if (x == 1 && y == 1) | |
| 76 correctColor[0] = 255; | |
| 77 if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[
1] || buf[index + 2] != correctColor[2]) { | |
| 78 testFailed('Drawing a point of size 1 touched pixels that should
not be touched'); | |
| 79 return false; | |
| 80 } | |
| 81 index += 4; | |
| 82 } | |
| 83 } | |
| 84 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 85 | |
| 86 debug('Draw a point of size 2 and verify it fills the appropriate region.'); | |
| 87 | |
| 88 var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE); | |
| 89 if (pointSizeRange < 2.0) | |
| 90 return true; | |
| 91 | |
| 92 gl.uniform1f(locPointSize, 2.0); | |
| 93 gl.drawArrays(gl.POINTS, 0, vertices.length / 3); | |
| 94 gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 95 index = 0; | |
| 96 for (var y = 0; y < 2; ++y) { | |
| 97 for (var x = 0; x < 2; ++x) { | |
| 98 var correctColor = [255, 0, 0]; | |
| 99 if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[
1] || buf[index + 2] != correctColor[2]) { | |
| 100 testFailed('Drawing a point of size 2 failed to fill the appropr
iate region'); | |
| 101 return false; | |
| 102 } | |
| 103 index += 4; | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 return true; | |
| 108 } | |
| 109 </script> | |
| 110 </head> | |
| 111 <body> | |
| 112 <canvas id="testbed" width="2px" height="2px"></canvas> | |
| 113 <div id="description"></div> | |
| 114 <div id="console"></div> | |
| 115 <script> | |
| 116 description('Verify GL_VERTEX_PROGRAM_POINT_SIZE is enabled in WebGL'); | |
| 117 | |
| 118 if (runTest()) | |
| 119 testPassed(""); | |
| 120 </script> | |
| 121 | |
| 122 | |
| 123 </body> | |
| 124 </html> | |
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Chromium Code Reviews
Issue 1601093008:
Remove duplicated WebGL layout tests. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master