# Left side should be green, and the right side should be gray.  In the bug
# case, both slides will be slightly different shades of green.
#
# If WORK_AROUND is defined in the vertex shader, correct results are produced.

[require]
GLSL >= 1.20

[vertex shader]
#version 120
//#define WORK_AROUND

attribute vec4 vertex;

uniform bool flag;
uniform float contrast;

varying vec4 color;

vec4 gray = vec4(0.4, 0.4, 0.4,
#ifndef WORK_AROUND
		 contrast
#else
		 1.0
#endif
		 );
vec4 orange = vec4(1.0, 0.72, 0.0,
#ifndef WORK_AROUND
		 contrast
#else
		 1.0
#endif
		 );

void main()
{
    color = gray;

    // Changing this to !flag doesn't affect the output of the test.
    if (flag)
	color = orange;

#ifdef WORK_AROUND
    color.w = contrast;
#endif

    gl_Position = vertex;
}

[fragment shader]
varying vec4 color;

void main()
{
    // Swizzle the W around to get gray or green.
    gl_FragColor = color.wyzw;
}

[test]
uniform int flag 1
uniform float contrast 0.1
draw rect -1 -1 1 2

uniform int flag 0
uniform float contrast 0.4
draw rect 0 -1 1 2