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
|
# This tests unrolling of a loop with a single exit point where the exact trip
# count is unknown, but the max iteration count can be guessed using the size
# of an array indexed via the induction variable.
#
# Here we test all possible (defined) outcomes for the loop.
[require]
GLSL >= 1.10
[vertex shader]
uniform int loop_count;
void main()
{
vec4 colour_array[4];
colour_array[0] = vec4(0.0, 0.25, 0.0, 1.0);
colour_array[1] = vec4(0.0, 0.5, 0.0, 1.0);
colour_array[2] = vec4(0.0, 0.75, 0.0, 1.0);
colour_array[3] = vec4(0.0, 1.0, 0.0, 1.0);
gl_Position = gl_Vertex;
vec4 colour = vec4(1.0, 1.0, 1.0, 1.0);
for (int i = 0; i < loop_count; i++) {
colour = colour_array[i];
}
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 0
draw rect -1 -1 2 2
probe all rgba 1.0 1.0 1.0 1.0
uniform int loop_count 1
draw rect -1 -1 2 2
probe all rgba 0.0 0.25 0.0 1.0
uniform int loop_count 2
draw rect -1 -1 2 2
probe all rgba 0.0 0.5 0.0 1.0
uniform int loop_count 3
draw rect -1 -1 2 2
probe all rgba 0.0 0.75 0.0 1.0
uniform int loop_count 4
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0
|
