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
|
# This tests unrolling of a loop with two exit point where the trip count
# of one of the exits is known to be zero and the other unknown
# (loop_count uniform).
[require]
GLSL >= 1.10
[vertex shader]
uniform int loop_count;
void main()
{
gl_Position = gl_Vertex;
vec4 colour = vec4(1.0, 0.0, 0.0, 1.0);
for (int i = 0; i < loop_count; i++) {
colour = vec4(0.0, 1.0, 0.0, 1.0);
if (i == 0)
break;
}
gl_FrontColor = colour;
}
[fragment shader]
void main()
{
gl_FragColor = gl_Color;
}
[test]
clear color 0.5 0.5 0.5 0.5
uniform int loop_count 1
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0
uniform int loop_count 0
draw rect -1 -1 2 2
probe all rgba 1.0 0.0 0.0 1.0
|
