shaders/cairo-gl/3.frag


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uniform vec4 source_constant;
vec4 get_source()
{
    return source_constant;
}
varying float mask_coverage;
vec4 get_mask()
{
    return vec4(0, 0, 0, mask_coverage);
}
void main()
{
    gl_FragColor = get_source() * get_mask().a;
}