# 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