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# Test that vertex array outputs that are passed to a geometry shader are
# valid if they are declared within an output block.
#
# From the GLSL 1.50 specification, section 4.3.4 ("Inputs"):
#
# "If the output of a vertex shader is itself an array to be consumed by a
# geometry shader, then it must appear in an output block (see interface blocks
# below) in the vertex shader and in an input block in the geometry shader with
# a block instance name declared as an array. This is required for arrays
# output from a vertex shader because two-dimensional arrays are not
# supported."
[require]
GL >= 3.2
GLSL >= 1.50
[vertex shader]
in vec4 vertex;
in float offset;
out vec4 pos;
out block {
float a[4];
};
out float off;
void main()
{
gl_Position = vertex;
pos = vertex;
for(int i = 0; i < 4; i++) {
a[i] = offset + i;
}
off = offset;
}
[geometry shader]
layout(triangles) in;
layout(triangle_strip, max_vertices = 3) out;
in vec4 pos[];
in block {
float a[4];
} b[];
in float off[];
out vec4 c;
void main()
{
bool pass = true;
for(int i = 0; i < 3; i++) {
for(int j = 0; j < 4; j++) {
if(b[i].a[j] != off[i] + j) pass = false;
}
}
for(int i = 0; i < 3; i++) {
gl_Position = pos[i];
c = pass ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
EmitVertex();
}
}
[fragment shader]
in vec4 c;
out vec4 color;
void main()
{
color = c;
}
[vertex data]
vertex/float/2 offset/float/1
-1.0 -1.0 0.0
1.0 -1.0 10.0
1.0 1.0 20.0
-1.0 1.0 30.0
[test]
draw arrays GL_TRIANGLE_FAN 0 4
probe all rgba 0.0 1.0 0.0 1.0
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