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
|
<!--
Copyright (c) 2023 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 EXT_clip_control Conformance Tests</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 width="32" height="32" id="c"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("This test verifies the functionality of the EXT_clip_control extension, if it is available.");
debug("");
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("c");
var ext;
const w = gl.drawingBufferWidth;
const h = gl.drawingBufferHeight;
function runTestNoExtension() {
debug("");
debug("Check the parameters without the extension");
shouldBeNull("gl.getParameter(0x935C /* CLIP_ORIGIN_EXT */)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
shouldBeNull("gl.getParameter(0x935D /* CLIP_DEPTH_MODE_EXT */)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function checkEnums() {
debug("");
debug("Check enums");
shouldBe("ext.LOWER_LEFT_EXT", "0x8CA1");
shouldBe("ext.UPPER_LEFT_EXT", "0x8CA2");
shouldBe("ext.NEGATIVE_ONE_TO_ONE_EXT", "0x935E");
shouldBe("ext.ZERO_TO_ONE_EXT", "0x935F");
shouldBe("ext.CLIP_ORIGIN_EXT", "0x935C");
shouldBe("ext.CLIP_DEPTH_MODE_EXT", "0x935D");
}
function checkQueries() {
debug("");
debug("Check default state");
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT');
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT');
debug("");
debug("Check state updates using the new function");
ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.ZERO_TO_ONE_EXT);
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.UPPER_LEFT_EXT');
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.ZERO_TO_ONE_EXT');
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.ZERO_TO_ONE_EXT);
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT');
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.ZERO_TO_ONE_EXT');
ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.UPPER_LEFT_EXT');
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT');
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT');
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT');
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function checkDepthMode() {
debug("");
debug("Check depth mode toggling");
gl.enable(gl.DEPTH_TEST);
gl.clear(gl.DEPTH_BUFFER_BIT);
const program = wtu.setupProgram(gl, [wtu.simpleVertexShader,
wtu.simpleColorFragmentShader]);
gl.useProgram(program);
const colorLoc = gl.getUniformLocation(program, "u_color");
wtu.setupUnitQuad(gl);
// Draw red at 0 with the default depth mode
gl.uniform4f(colorLoc, 1, 0, 0, 1);
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
wtu.drawUnitQuad(gl);
wtu.checkCanvasRect(gl, 0, 0, w, h, [255, 0, 0, 255]);
// Draw green at 0, depth test must fail
gl.uniform4f(colorLoc, 0, 1, 0, 1);
wtu.drawUnitQuad(gl);
wtu.checkCanvasRect(gl, 0, 0, w, h, [255, 0, 0, 255]);
// Draw green at 0 after switching the depth mode
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.ZERO_TO_ONE_EXT);
wtu.drawUnitQuad(gl);
wtu.checkCanvasRect(gl, 0, 0, w, h, [0, 255, 0, 255]);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function checkClipOrigin() {
debug("");
debug("Check clip origin toggling");
gl.disable(gl.DEPTH_TEST);
const vertexShader = `
attribute vec4 vPosition;
varying float y;
void main() {
gl_Position = vPosition;
y = vPosition.y;
}`;
const fragmentShader = `
precision mediump float;
varying float y;
void main() {
if (y > 0.0) {
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
} else {
gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
}
}`;
const program = wtu.setupProgram(gl, [vertexShader, fragmentShader]);
gl.useProgram(program);
wtu.setupUnitQuad(gl);
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
wtu.drawUnitQuad(gl);
wtu.checkCanvasRect(gl, 0, 0, w, h / 2 - 2, [0, 255, 0, 255]);
wtu.checkCanvasRect(gl, 0, h / 2 + 2, w, h / 2 - 2, [255, 0, 0, 255]);
ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
wtu.drawUnitQuad(gl);
wtu.checkCanvasRect(gl, 0, 0, w, h / 2 - 2, [255, 0, 0, 255]);
wtu.checkCanvasRect(gl, 0, h / 2 + 2, w, h / 2 - 2, [0, 255, 0, 255]);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function runTestExtension() {
checkEnums();
checkQueries();
checkDepthMode();
checkClipOrigin();
}
function runTest() {
if (!gl) {
testFailed("WebGL context does not exist");
return;
}
testPassed("WebGL context exists");
runTestNoExtension();
ext = gl.getExtension("EXT_clip_control");
wtu.runExtensionSupportedTest(gl, "EXT_clip_control", ext !== null);
if (ext !== null) {
runTestExtension();
} else {
testPassed("No EXT_clip_control support -- this is legal");
}
}
runTest();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
