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Issue 8342021: Add webgl conformance tests r15841. (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/
Patch Set: Created 9 years, 2 months ago
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1 <!--
2 Copyright (c) 2011 The Chromium Authors. 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 Canvas Conformance Tests</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 <div id="description"></div>
18 <div id="console"></div>
19 <canvas id="canvas" width="50" height="50"> </canvas>
20
21 <script id="vshader" type="x-shader/x-vertex">
22 attribute vec4 vPosition;
23 void main()
24 {
25 gl_Position = vPosition;
26 }
27 </script>
28
29 <script id="fshader" type="x-shader/x-fragment">
30 void main()
31 {
32 gl_FragColor = vec4(1.0,0.0,0.0,1.0);
33 }
34 </script>
35
36 <script>
37 function fail(x,y, buf, shouldBe)
38 {
39 var i = (y*50+x) * 4;
40 var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+", "+buf[i+3]+"), should be "+shouldBe;
41 testFailed(reason);
42 }
43
44 function pass()
45 {
46 testPassed("drawing is correct");
47 }
48
49 function drawTriangleTest(gl)
50 {
51 gl.viewport(0, 0, 50, 50);
52 var vertexObject = gl.createBuffer();
53 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
54 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0 .5,0 ]), gl.STATIC_DRAW);
55 gl.enableVertexAttribArray(0);
56 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
57
58 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
59 gl.drawArrays(gl.TRIANGLES, 0, 3);
60
61 var buf = new Uint8Array(50 * 50 * 4);
62 gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
63
64 // Test several locations
65 // First line should be all black
66 for (var i = 0; i < 50; ++i) {
67 if (buf[i*4] != 0 || buf[i*4+1] != 0 || buf[i*4+2] != 0 || buf[i*4+3] != 255 ) {
68 fail(i, 0, buf, "(0,0,0,255)");
69 return;
70 }
71 }
72 // Line 15 should be red for at least 10 red pixels starting 20 pixels in
73 var offset = (15*50+20) * 4;
74 for (var i = 0; i < 10; ++i) {
75 if (buf[offset+i*4] != 255 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
76 fail(20 + i, 15, buf, "(255,0,0,255)");
77 return;
78 }
79 }
80 // Last line should be all black
81 offset = (49*50) * 4;
82 for (var i = 0; i < 50; ++i) {
83 if (buf[offset+i*4] != 0 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
84 fail(i, 49, buf, "(0,0,0,255)");
85 return;
86 }
87 }
88 }
89
90 description("This test ensures WebGL implementations correctly implement drawing bufferWidth/Height with compositing.");
91
92 debug("");
93
94 var wtu = WebGLTestUtils;
95 var err;
96 var maxSize;
97 var canvas = document.getElementById("canvas");
98 var gl = wtu.create3DContext(canvas);
99 if (!gl) {
100 testFailed("context does not exist");
101 } else {
102 testPassed("context exists");
103
104 gl.program = createProgram(gl, "vshader", "fshader", ["vPosition"]);
105 shouldBeNonNull(gl.program);
106 gl.useProgram(gl.program);
107 gl.enable(gl.DEPTH_TEST);
108 gl.disable(gl.BLEND);
109 gl.clearColor(0, 0, 0, 1);
110 gl.clearDepth(1);
111 shouldBe('gl.getError()', 'gl.NO_ERROR');
112
113 debug("");
114 debug("Checking drawingBufferWidth/drawingBufferHeight");
115
116 // Check that a canvas with no width or height is 300x150 pixels
117 shouldBe('gl.drawingBufferWidth', 'canvas.width');
118 shouldBe('gl.drawingBufferHeight', 'canvas.height');
119
120 // Check that changing the canvas size to something too large falls back to re asonable values.
121 maxSize = gl.getParameter(gl.MAX_VIEWPORT_DIMS);
122 shouldBeTrue('maxSize[0] > 0');
123 shouldBeTrue('maxSize[1] > 0');
124
125 // debug("MAX_VIEWPORT_DIMS = " + maxSize[0] + "x" + maxSize[1]);
126 canvas.width = maxSize[0] * 4;
127 canvas.height = maxSize[1] * 4;
128 shouldBeTrue('gl.drawingBufferWidth > 0');
129 shouldBeTrue('gl.drawingBufferHeight > 0');
130 shouldBeTrue('gl.drawingBufferWidth <= maxSize[0]');
131 shouldBeTrue('gl.drawingBufferHeight <= maxSize[1]');
132 shouldBe('gl.getError()', 'gl.NO_ERROR');
133
134 debug("");
135 debug("Checking scaling up then back down to 50/50, drawing still works.");
136 canvas.width = 50;
137 canvas.height = 50;
138 shouldBeTrue('gl.drawingBufferWidth == 50');
139 shouldBeTrue('gl.drawingBufferHeight == 50');
140 shouldBe('gl.getError()', 'gl.NO_ERROR');
141 drawTriangleTest(gl);
142 shouldBe('gl.getError()', 'gl.NO_ERROR');
143 }
144 debug("")
145 successfullyParsed = true;
146 </script>
147 <script src="../../resources/js-test-post.js"></script>
148 </body>
149 </html>
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