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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
<!--
/*
** Copyright (c) 2012 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL FBO Lost Context Test</title>
<link rel="stylesheet" href="../resources/js-test-style.css"/>
<script src="../../devtools/src/debug/webgl-debug.js"></script>
<script src="../js/js-test-pre.js"></script>
<script src="../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script id="vshader" type="x-shader/x-vertex">
attribute vec4 vPosition;
attribute vec2 texCoord0;
uniform mat4 world;
varying vec2 texCoord;
void main()
{
gl_Position = vPosition * world;
texCoord = texCoord0;
}
</script>
<script id="fshader" type="x-shader/x-fragment">
precision mediump float;
uniform sampler2D tex;
varying vec2 texCoord;
void main()
{
gl_FragColor = texture2D(tex, texCoord);
}
</script>
<canvas id="canvas" width="1024" height="1024"> </canvas>
<script>
"use strict";
description("This test is to help see if an WebGL app *can* get lost context.");
debug("");
debug("Canvas.getContext");
var wtu = WebGLTestUtils;
var g_worldLoc;
var g_texLoc;
var g_textures = [];
var gl = wtu.create3DContext("canvas");
if (!gl) {
testFailed("context does not exist");
} else {
testPassed("context exists");
debug("");
debug("Checking for out of memory handling.");
var program = wtu.setupProgram(["vshader", "fshader"], ["vPosition", "texCoord0"]);
var size = gl.getParameter(gl.MAX_RENDERBUFFER_SIZE);
debug("max render buffer size: " + size);
size = size / 2;
debug("size used: " + size);
var allocateFramebuffers = true;
var itervalId;
var count = 0;
gl = WebGLDebugUtils.makeDebugContext(gl, function(err, functionName, args) {
window.clearInterval(intervalId);
assertMsg(err == gl.OUT_OF_MEMORY,
"correctly returns gl.OUT_OF_MEMORY when out of memory");
finish();
});
function createFBO() {
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texImage2D(gl.TEXTURE_2D,
0, // level
gl.RGBA, // internalFormat
size, // width
size, // height
0, // border
gl.RGBA, // format
gl.UNSIGNED_BYTE, // type
null); // data
var fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(
gl.FRAMEBUFFER,
gl.COLOR_ATTACHMENT0,
gl.TEXTURE_2D,
tex,
0);
var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
if (status != gl.FRAMEBUFFER_COMPLETE) {
testFailed("gl.checkFramebufferStatus() returned " + WebGLDebugUtils.glEnumToString(status));
}
return { fb: fb, tex: tex };
}
gl.disable(gl.DEPTH_TEST);
var numFBOs = 32;
for (var ii = 0; ii < numFBOs; ++ii) {
createFBO();
var t = createFBO();
tex = t.tex;
fb = t.fb;
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.scissor(0, 0, size, size);
gl.clearColor(0, ii / numFBOs, 1 - ii / numFBOs, 1);
gl.clear(gl.COLOR_BUFFER_BIT);
g_textures.push(tex);
}
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
-1,1,0, 1,1,0, -1,-1,0,
-1,-1,0, 1,1,0, 1,-1,0
]), gl.STATIC_DRAW);
gl.enableVertexAttribArray(0);
gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
0,0, 1,0, 0,1,
0,1, 1,0, 1,1
]), gl.STATIC_DRAW);
gl.enableVertexAttribArray(1);
gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);
gl.bindTexture(gl.TEXTURE_2D, tex);
g_texLoc = gl.getUniformLocation(gl.program, "tex");
gl.uniform1i(g_texLoc, 0);
g_worldLoc = gl.getUniformLocation(gl.program, "world");
gl.uniformMatrix4fv(g_worldLoc, false, [
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1]);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
setInterval(render, 1000/60);
}
var g_angle = 0;
var g_texIndex = 0;
function render() {
g_angle += 0.1;
g_texIndex++;
if (g_texIndex >= g_textures.length) {
g_texIndex = 0;
}
gl.bindTexture(gl.TEXTURE_2D, g_textures[g_texIndex]);
gl.uniformMatrix4fv(g_worldLoc, false, rotationZ(g_angle));
gl.clearColor(1,0,0,1);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
gl.drawArrays(gl.TRIANGLES, 0, 6);
}
/**
* Creates a 4-by-4 matrix which rotates around the z-axis by the given angle.
* @param {number} angle The angle by which to rotate (in radians).
* @return {!o3djs.math.Matrix4} The rotation matrix.
*/
function rotationZ(angle) {
var c = Math.cos(angle);
var s = Math.sin(angle);
return [
c, s, 0, 0,
-s, c, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
];
};
debug("");
var successfullyParsed = true;
</script>
<script>
"use strict";
</script>
</body>
</html>
|
