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
|
<!--
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>WebGL: Check that state is not lost by compositing</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="testbed" width="16" height="16" style="width:50px; height:50px"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description();
var wtu = WebGLTestUtils;
function runTest()
{
var gl = wtu.create3DContext('testbed', { antialias: false });
if (!gl) {
testFailed('could not create context');
return;
}
var program = wtu.setupTexturedQuad(gl);
var tex = gl.createTexture();
var fb = gl.createFramebuffer();
var step1 = function() {
wtu.fillTexture(gl, tex, 1, 1, [0, 255, 0, 255]);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, [0, 255, 0, 255], "drawing with texture should be green");
};
var step2 = function() {
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, [0, 255, 0, 255], "drawing with texture after composite without rebinding should be green");
// Clear background to red
gl.clearColor(1, 0, 0, 1);
gl.clear(gl.COLOR_BUFFER_BIT);
// Bind framebuffer with green texture.
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 255, 0, 255], "reading from fbo with attached texture should be green");
};
var step3 = function() {
// Should still have fb bound and reading should be green
wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 255, 0, 255], "reading from fbo after composite without rebinding should be green");
};
var steps = [
step1,
step2,
step3,
];
var stepIndex = 0;
var runNextStep = function() {
steps[stepIndex++]();
if (stepIndex == steps.length) {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
finishTest();
return;
}
wtu.waitForComposite(runNextStep);
};
runNextStep();
}
runTest();
var successfullyParsed = true;
</script>
</body>
</html>
|
