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[require]
GLSL >= 1.10
/* built-in function could be overriden, but should not impact
another shader.
*/
[vertex shader]
void main()
{
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
}
[fragment shader]
float myfunc(float);
float abs(float f)
{
return f-1.0;
}
void main()
{
gl_FragColor = vec4(abs(1.0), myfunc(1.0), 0.0, 1.0);
}
[fragment shader]
float myfunc(float f)
{
return abs(f);
}
[test]
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0
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