1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Simple Rendering Test</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"> </script>
</head>
<body>
<canvas id="example" width="50" height="50">
There is supposed to be an example drawing here, but it's not important.
</canvas>
<div id="description"></div>
<div id="console"></div>
<script id="vshader" type="x-shader/x-vertex">
attribute vec4 a_Position;
void main()
{
gl_Position = a_Position;
}
</script>
<script id="fshader" type="x-shader/x-fragment">
void main()
{
gl_FragColor = vec4(0,1,0,1);
}
</script>
<script>
"use strict";
var wtu = WebGLTestUtils;
function init()
{
description();
var gl = wtu.create3DContext("example");
var program = wtu.loadProgramFromScript(gl, "vshader", "fshader");
gl.useProgram(program);
var loc = gl.getAttribLocation(program, "a_Position");
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(
gl.ARRAY_BUFFER,
new Float32Array(
[ 1, 1,
-1, 1,
-1, -1,
1, 1,
-1, -1,
1, -1]),
gl.STATIC_DRAW);
gl.enableVertexAttribArray(loc);
gl.vertexAttribPointer(loc, 2, gl.FLOAT, false, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
wtu.checkCanvas(gl, [0,0,0,0], "should be black", 0);
gl.drawArrays(gl.TRIANGLES, 0, 6);
wtu.checkCanvas(gl, [0,255,0,255], "should be green", 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
}
init();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
