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
|
<!--
/*
** Copyright (c) 2015 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>GLSL short-circuiting operators should be evaluated after previous operands in a sequence</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>
<script src="../../../js/glsl-conformance-test.js"></script>
</head>
<body>
<canvas id="canvas" width="64" height="64"> </canvas>
<div id="description"></div>
<div id="console"></div>
<script id="fshaderSequenceSideEffectsAffectTernary" type="x-shader/x-fragment">
precision mediump float;
bool correct = true;
uniform float u_zero;
float wrong() {
correct = false;
return 0.0;
}
void main() {
// ESSL 1.00 section 5.9, about sequence operator:
// "All expressions are evaluated, in order, from left to right"
// Also use a ternary operator where the third operand has side effects to make sure
// only the second operand is evaluated.
float a = u_zero - 0.5; // Result should be -0.5.
float green = (a++, a > 0.0 ? 1.0 : wrong());
gl_FragColor = vec4(0.0, correct ? green : 0.0, 0.0, 1.0);
}
</script>
<script id="fshaderSequenceSideEffectsAffectAnd" type="x-shader/x-fragment">
precision mediump float;
uniform bool u_false;
bool sideEffectA = false;
bool funcA() {
sideEffectA = true;
return true;
}
bool sideEffectB = false;
bool funcB() {
sideEffectB = true;
return true;
}
void main() {
bool b = (funcA(), u_false == sideEffectA && funcB());
gl_FragColor = (!b && sideEffectA && !sideEffectB) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
}
</script>
<script id="fshaderSequenceSideEffectsAffectOr" type="x-shader/x-fragment">
precision mediump float;
uniform bool u_false;
bool sideEffectA = false;
bool funcA() {
sideEffectA = true;
return false;
}
bool sideEffectB = false;
bool funcB() {
sideEffectB = true;
return false;
}
void main() {
bool b = (funcA(), (u_false == !sideEffectA) || funcB());
gl_FragColor = (b && sideEffectA && !sideEffectB) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
}
</script>
<script type="application/javascript">
"use strict";
description();
debug("");
debug("This test is targeted to stress syntax tree transformations that might need to be done in shader translation to unfold operators.");
GLSLConformanceTester.runRenderTests([
{
fShaderId: 'fshaderSequenceSideEffectsAffectTernary',
fShaderSuccess: true,
linkSuccess: true,
passMsg: 'Expression where first operand of a sequence operator has side effects which affect the second operand that is a ternary operator'
},
{
fShaderId: 'fshaderSequenceSideEffectsAffectAnd',
fShaderSuccess: true,
linkSuccess: true,
passMsg: 'Expression where first operand of a sequence operator has side effects which affect the second operand that is an and operator'
},
{
fShaderId: 'fshaderSequenceSideEffectsAffectOr',
fShaderSuccess: true,
linkSuccess: true,
passMsg: 'Expression where first operand of a sequence operator has side effects which affect the second operand that is an or operator'
}
]);
</script>
</body>
</html>
|
