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
|
[require]
GLSL >= 1.50
GL_ARB_tessellation_shader
[vertex shader]
#version 150
in vec4 piglit_vertex;
void main()
{
gl_Position = piglit_vertex;
}
[tessellation control shader]
#version 150
#extension GL_ARB_tessellation_shader : require
layout(vertices = 4) out;
uniform int index;
patch out ivec4 v;
void main()
{
if (gl_InvocationID == 0)
v = ivec4(-1);
barrier();
// Write part of the variable and with a swizzle
if (gl_InvocationID < 3)
v.wxy[2 - gl_InvocationID] = int(gl_InvocationID);
gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;
gl_TessLevelOuter = float[4](1.0, 1.0, 1.0, 1.0);
gl_TessLevelInner = float[2](1.0, 1.0);
}
[tessellation evaluation shader]
#version 150
#extension GL_ARB_tessellation_shader : require
layout(quads, equal_spacing) in;
uniform int index;
patch in ivec4 v;
out vec4 fscolor;
#define INTERP_QUADj(INj, OUT) do { \
vec4 v[4]; \
for (int j = 0; j < 4; j++) v[j] = INj; \
OUT = mix(mix(v[0], v[1], gl_TessCoord[0]), mix(v[2], v[3], gl_TessCoord[0]), \
gl_TessCoord[1]); \
} while(false)
void main() {
bool pass = true;
if (v != ivec4(1, 0, -1, 2))
pass = false;
fscolor = pass ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0);
INTERP_QUADj(gl_in[j].gl_Position, gl_Position);
}
[fragment shader]
#version 150
in vec4 fscolor;
out vec4 outcolor;
void main()
{
outcolor = fscolor;
}
[test]
clear color 0.5 0.5 0.5 0.5
clear
patch parameter vertices 4
draw rect patch -1 -1 0.09 0.09
#draw arrays GL_PATCHES 0 4
probe rgb 6 6 0.0 1.0 0.0
|
