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# Test that the qualifiers 'smooth', 'flat', and 'noperspective' can appear on
# geometry shader ins and outs.
#
# From the GLSL 1.50 specification, section 4.3 ("Storage Qualifiers"):
#
# "Outputs from shader (out) and inputs to a shader (in) can be further
# qualified with one of these interpolation qualifiers:
# smooth
# flat
# noperspective"
[require]
GL >= 3.2
GLSL >= 1.50
[vertex shader]
uniform mat4 mvp;
in vec4 vertex;
in vec3 input_data;
out vec4 pos;
flat out float a;
smooth out float b;
noperspective out float c;
void main()
{
gl_Position = vertex * mvp;
pos = vertex * mvp;
a = input_data.r;
b = input_data.g;
c = input_data.b;
}
[geometry shader]
layout(triangles) in;
layout(triangle_strip, max_vertices = 3) out;
in vec4 pos[];
flat in float a[];
smooth in float b[];
noperspective in float c[];
flat out float aa;
smooth out float bb;
noperspective out float cc;
void main()
{
for(int i = 0; i < 3; i++) {
gl_Position = pos[i];
aa = a[i];
bb = b[i];
cc = c[i];
EmitVertex();
}
}
[fragment shader]
flat in float aa;
smooth in float bb;
noperspective in float cc;
out vec4 color;
void main()
{
color = vec4(aa, bb, cc, 1.0);
}
[vertex data]
vertex/float/3 input_data/float/3
0.0 6.0 -2.0 0.25 1.0 0.0
-3.0 -3.0 -1.0 0.50 0.0 0.0
9.0 -9.0 -3.0 0.75 0.0 1.0
[test]
uniform mat4 mvp 1 0 0 0 0 1 0 0 0 0 -2 -1 0 0 -3 0
clear color 0.0 0.0 0.0 0.0
clear
draw arrays GL_TRIANGLE_FAN 0 3
relative probe rgba (0.444444444444, 0.222222222222) (0.75, 0.166666666667, 0.333333333333, 1.0)
relative probe rgba (0.636363636364, 0.181818181818) (0.75, 0.166666666667, 0.545454545455, 1.0)
relative probe rgba (0.769230769231, 0.153846153846) (0.75, 0.166666666667, 0.692307692308, 1.0)
relative probe rgba (0.866666666667, 0.133333333333) (0.75, 0.166666666667, 0.8, 1.0)
relative probe rgba (0.5, 0.4 ) (0.75, 0.333333333333, 0.3, 1.0)
relative probe rgba (0.666666666667, 0.333333333333) (0.75, 0.333333333333, 0.5, 1.0)
relative probe rgba (0.785714285714, 0.285714285714) (0.75, 0.333333333333, 0.642857142857, 1.0)
relative probe rgba (0.545454545455, 0.545454545455) (0.75, 0.5, 0.272727272727, 1.0)
relative probe rgba (0.692307692308, 0.461538461538) (0.75, 0.5, 0.461538461538, 1.0)
relative probe rgba (0.583333333333, 0.666666666667) (0.75, 0.666666666667, 0.25, 1.0)
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