content/canvas/test/webgl-conformance/conformance/attribs/gl-vertexattribpointer-offsets.html@8bccb770b82d
content/canvas/test/webgl-conformance/conformance/attribs/gl-vertexattribpointer-offsets.html
Wed, 31 Dec 2014 13:27:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 13:27:57 +0100
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
- permissions
- -rw-r--r--
Ignore runtime configuration files generated during quality assurance.
1 <!--
2 Copyright (C) 2011 Apple Computer, Inc. All rights reserved.
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5 modification, are permitted provided that the following conditions
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17 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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21 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 -->
26 <!DOCTYPE html>
27 <html>
28 <head>
29 <meta charset="utf-8">
30 <title>vertexattribpointer offsets test</title>
31 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
32 <script src="../../resources/js-test-pre.js"></script>
33 <script src="../resources/webgl-test.js"> </script>
34 <script src="../resources/webgl-test-utils.js"> </script>
35 </head>
36 <body>
37 <canvas id="example" width="50" height="50">
38 There is supposed to be an example drawing here, but it's not important.
39 </canvas>
40 <div id="description"></div>
41 <div id="console"></div>
42 <script id="vshader" type="x-shader/x-vertex">
43 attribute vec4 vPosition;
44 void main()
45 {
46 gl_Position = vPosition;
47 }
48 </script>
50 <script id="fshader" type="x-shader/x-fragment">
51 precision mediump float;
52 uniform vec4 color;
53 void main()
54 {
55 gl_FragColor = color;
56 }
57 </script>
59 <script>
60 function fail(x,y, buf, shouldBe)
61 {
62 var i = (y*50+x) * 4;
63 var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
64 testFailed(reason);
65 }
67 function pass()
68 {
69 testPassed("drawing is correct");
70 }
72 function init()
73 {
74 if (window.initNonKhronosFramework) {
75 window.initNonKhronosFramework(false);
76 }
77 description("test vertexattribpointer offsets work");
79 wtu = WebGLTestUtils;
80 gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);
82 var tests = [
83 { data: new Float32Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
84 type: gl.FLOAT,
85 componentSize: 4,
86 normalize: false,
87 },
88 { data: new Float32Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
89 type: gl.FLOAT,
90 componentSize: 4,
91 normalize: false,
92 },
93 { data: new Uint16Array([ 0, 32767, 0, 32767, 0, 0, 0, 0, 0 ]),
94 type: gl.SHORT,
95 componentSize: 2,
96 normalize: true,
97 },
98 { data: new Uint16Array([ 0, 65535, 0, 65535, 0, 0, 0, 0, 0 ]),
99 type: gl.UNSIGNED_SHORT,
100 componentSize: 2,
101 normalize: true,
102 },
103 { data: new Uint16Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
104 type: gl.UNSIGNED_SHORT,
105 componentSize: 2,
106 normalize: false,
107 },
108 { data: new Uint16Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
109 type: gl.SHORT,
110 componentSize: 2,
111 normalize: false,
112 },
113 { data: new Uint8Array([ 0, 127, 0, 127, 0, 0, 0, 0, 0 ]),
114 type: gl.BYTE,
115 componentSize: 1,
116 normalize: true,
117 },
118 { data: new Uint8Array([ 0, 255, 0, 255, 0, 0, 0, 0, 0 ]),
119 type: gl.UNSIGNED_BYTE,
120 componentSize: 1,
121 normalize: true,
122 },
123 { data: new Uint8Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
124 type: gl.BYTE,
125 componentSize: 1,
126 normalize: false,
127 },
128 { data: new Uint8Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
129 type: gl.UNSIGNED_BYTE,
130 componentSize: 1,
131 normalize: false,
132 }
133 ];
135 var vertexObject = gl.createBuffer();
136 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
137 gl.bufferData(gl.ARRAY_BUFFER, 1024, gl.STATIC_DRAW);
138 gl.enableVertexAttribArray(0);
140 var colorLoc = gl.getUniformLocation(gl.program, "color");
141 var kNumVerts = 3;
142 var kNumComponents = 3;
144 var count = 0;
145 for (var tt = 0; tt < tests.length; ++tt) {
146 var test = tests[tt];
147 for (var oo = 0; oo < 3; ++oo) {
148 for (var ss = 0; ss < 3; ++ss) {
149 var offset = (oo + 1) * test.componentSize;
150 var color = (count % 2) ? [1, 0, 0, 1] : [0, 1, 0, 1];
151 var stride = test.componentSize * kNumComponents + test.componentSize * ss;
152 debug("");
153 debug("check with " + wtu.glEnumToString(gl, test.type) + " at offset: " + offset + " with stride:" + stride + " normalize: " + test.normalize);
154 gl.uniform4fv(colorLoc, color);
155 var data = new Uint8Array(test.componentSize * kNumVerts * kNumComponents + stride * (kNumVerts - 1));
156 var view = new Uint8Array(test.data.buffer);
157 var size = test.componentSize * kNumComponents;
158 for (var jj = 0; jj < kNumVerts; ++jj) {
159 var off1 = jj * size;
160 var off2 = jj * stride;
161 for (var zz = 0; zz < size; ++zz) {
162 data[off2 + zz] = view[off1 + zz];
163 }
164 }
165 gl.bufferSubData(gl.ARRAY_BUFFER, offset, data);
166 gl.vertexAttribPointer(0, 3, test.type, test.normalize, stride, offset);
167 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
168 gl.drawArrays(gl.TRIANGLES, 0, 3);
170 var buf = new Uint8Array(50 * 50 * 4);
171 gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
173 var black = [0, 0, 0, 255];
174 var other = [color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255];
175 var otherMsg = "should be " + ((count % 2) ? "red" : "green")
176 wtu.checkCanvasRect(gl, 0, 0, 1, 1, black, "should be black", 0);
177 wtu.checkCanvasRect(gl, 0, 49, 1, 1, black, "should be black", 0);
178 wtu.checkCanvasRect(gl, 26, 40, 1, 1, other, otherMsg, 0);
179 wtu.checkCanvasRect(gl, 26, 27, 1, 1, other, otherMsg, 0);
180 wtu.checkCanvasRect(gl, 40, 27, 1, 1, other, otherMsg, 0);
181 ++count;
182 }
183 }
184 }
185 }
187 init();
188 successfullyParsed = true;
189 </script>
190 <script>finishTest();</script>
192 </body>
193 </html>
