SPIRV-Cross/shaders/frag/for-loop-init.frag
2016-12-16 13:48:30 +01:00

53 lines
1010 B
GLSL

#version 310 es
precision mediump float;
layout(location = 0) out int FragColor;
void main()
{
FragColor = 16;
// Basic loop variable.
for (int i = 0; i < 25; i++)
FragColor += 10;
// Multiple loop variables.
for (int i = 1, j = 4; i < 30; i++, j += 4)
FragColor += 11;
// A potential loop variables, but we access it outside the loop,
// so cannot be one.
int k = 0;
for (; k < 20; k++)
FragColor += 12;
k += 3;
FragColor += k;
// Potential loop variables, but the dominator is not trivial.
int l;
if (k == 40)
{
for (l = 0; l < 40; l++)
FragColor += 13;
return;
}
else
{
l = k;
FragColor += l;
}
// Vectors cannot be loop variables
for (ivec2 i = ivec2(0); i.x < 10; i.x += 4)
{
FragColor += i.y;
}
// Check that static expressions can be used before the loop header.
int m = 0;
m = k;
int o = m;
for (; m < 40; m++)
FragColor += m;
FragColor += o;
}