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// From the ARB_separate_shader_objects spec v.25:
//
// "To use any built-in input or output in the gl_PerVertex and
// gl_PerFragment blocks in separable program objects, shader code
// must redeclare those blocks prior to use. A separable program
// will fail to link if:
//
// * it contains multiple shaders of a single type with different
// redeclarations of these built-in input and output blocks; or
//
// * any shader uses a built-in block member not found in the
// redeclaration of that block."
//
// Issues section (issue #28) states that redeclaration is not
// required for GLSL shaders using #version 140 or earlier (since
// interface blocks are not possible with older versions).
//
[require]
GLSL >= 1.40
GL_ARB_separate_shader_objects
SEPARABLE PROGRAM ENABLED
[vertex shader]
#version 140
void main()
{
gl_PointSize = float(256.0);
}
[fragment shader]
#version 140
out vec4 color;
void main()
{
float len = length((gl_PointCoord.xy / 1.0) - vec2(0.5));
color = vec4(len);
}
[test]
link success
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