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
|
<!--
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 Multi-Context Sampler 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="canvas_drawing" width="12" height="12"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("Tests that samplers' state doesn't leak across contexts");
debug("");
debug('Regression test for <a href="http://crbug.com/713127">http://crbug.com/713127</a>');
function runTest() {
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("canvas_drawing", undefined, 2);
var texture = null;
var color = [0, 255, 0, 255];
if (!gl) {
testFailed("WebGL context does not exist");
return;
}
testPassed("WebGL context exists");
wtu.setupTexturedQuad(gl);
texture = gl.createTexture();
// Create a texture bigger than 1x1 so that it would need mipmaps in
// order to be complete.
wtu.fillTexture(gl, texture, 2, 2, color, 0,
gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA8);
// Set texture parameters so that this texture is complete.
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
// Set up a secondary context with a sampler bound to texture unit
// 0. This should not interfere with the primary context.
var altGL = wtu.create3DContext(undefined, undefined, 2);
if (!altGL) {
testFailed("Error creating secondary WebGL context");
return;
}
var sampler = altGL.createSampler();
// Note that the sampler's default TEXTURE_MIN_FILTER is
// NEAREST_MIPMAP_LINEAR.
altGL.bindSampler(0, sampler);
altGL.clearColor(1, 0, 0, 1);
altGL.clear(altGL.COLOR_BUFFER_BIT);
wtu.checkCanvasRect(altGL, 0, 0, 1, 1, [ 255, 0, 0, 255 ],
"should be red");
// Now switch back to the main context and draw the texture.
gl.clearColor(1, 1, 1, 1);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
wtu.drawUnitQuad(gl);
// The presence of the sampler on the other context should not
// have interfered with the completeness of the texture.
wtu.checkCanvasRect(gl, 0, 0, 1, 1, color,
"should be green");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
}
runTest();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
