src/fragment.glsl


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#version 330 core
out vec4 FragColor;

in vec2 texCoord;

uniform sampler2D texture0;
uniform sampler2D texture1;

void
main()
{
	vec4 col = mix(texture(texture0, texCoord),
	               texture(texture1, texCoord), 0.2);
	col.r = (col.r < 0.5) ? 0.0 : 1.0;
	col.g = (col.g < 0.5) ? 0.0 : 1.0;
	col.b = (col.b < 0.5) ? 0.0 : 1.0;
	if (col.r == 1.0 && col.g == 1.0)
		col.rgb = vec3(1.0, 1.0, 0.0);
	else if (col.r == 1.0)
		col.rgb = vec3(0.0, 1.0, 1.0);
	else
		col.rgb = vec3(1.0, 0.0, 1.0);
	FragColor = col;
}