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# Test proper behavior of the unary '--' operator.
[require]
GLSL >= 1.50
GL_ARB_gpu_shader_fp64
[vertex shader]
#version 150
#extension GL_ARB_gpu_shader_fp64 : require
uniform double tolerance;
uniform dvec4 starting_value;
uniform dvec4 expected4;
uniform dvec3 expected3;
uniform dvec2 expected2;
uniform double expected1;
in vec4 piglit_vertex;
out vec4 vscolor;
void main()
{
gl_Position = piglit_vertex;
vscolor = vec4(0.0);
dvec4 starting_point = starting_value;
dvec4 result4 = starting_point--;
if (distance(result4, expected4) > tolerance)
vscolor.x = 1.0;
dvec3 result3 = --starting_point.xyz;
if (distance(result3, expected3) > tolerance)
vscolor.y = 1.0;
dvec2 result2 = starting_point.zw--;
if (distance(result2, expected2) > tolerance)
vscolor.z = 1.0;
double result1 = --starting_point.x;
if (distance(result1, expected1) > tolerance)
vscolor.w = 1.0;
}
[fragment shader]
#version 150
in vec4 vscolor;
out vec4 color;
void main() {
color = vscolor;
}
[test]
clear color 0.0 0.0 1.0 0.0
clear
uniform double tolerance 0.0
uniform dvec4 starting_value 0.0 1.0 1.25 0.75
uniform dvec4 expected4 0.0 1.0 1.25 0.75
uniform dvec3 expected3 -2.0 -1.0 -0.75
uniform dvec2 expected2 -0.75 -0.25
uniform double expected1 -3.0
draw rect -1 -1 2 2
probe rgba 0 0 0.0 0.0 0.0 0.0
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