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[require]
GLSL >= 1.30
GL_ARB_uniform_buffer_object
[vertex shader]
#extension GL_ARB_uniform_buffer_object : require
uniform test_unif1
{
float test1;
float test2;
};
uniform test_unif2
{
float test3;
float test4;
};
in vec4 piglit_vertex;
out vec4 fcolor;
void main(void)
{
gl_Position = piglit_vertex;
// The GLSL compiler has a bug that compiles this expression as:
// vec4(test1, test2, test1, test2)
//
// In other words, it only fetches from the first uniform block.
//
// This bug can be avoided by doing:
// vec4(test1, test2, test3, 0.4)
//
// In this case, the GLSL compiler correctly generates a fetch
// from the second uniform block.
fcolor = vec4(test1, test2, test3, test4);
}
[fragment shader]
in vec4 fcolor;
void main()
{
gl_FragColor = fcolor;
}
[test]
link success
uniform float test1 0.1
uniform float test2 0.2
uniform float test3 0.3
uniform float test4 0.4
draw rect -1 -1 2 2
probe all rgba 0.1 0.2 0.3 0.4
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