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[require]
GLSL >= 1.10
[vertex shader]
/* this is a test for a bug in constructor handling in glsl2. It
* would evaluate the expression used in the constructor for each
* channel it needed to pull out.
*/
vec4 color = vec4(0.0);
vec2 get_val()
{
color += vec4(1.0, 1.0, 0.0, 0.0);
return vec2(1.0, 0.0);
}
void main()
{
vec4 val = vec4(get_val(), 0.0, 0.0);
val += color;
/* If the bug is present, val is (3,2,0,0), but it should be
* (2,1,0,0).
*/
gl_FrontColor = val - vec4(2.0, 0, 0.0, 0.0);
gl_Position = gl_Vertex;
}
[fragment shader]
void main()
{
gl_FragColor = gl_Color;
}
[test]
draw rect -1 -1 2 2
probe rgb 1 1 0.0 1.0 0.0
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