#version 440
layout(location = 0) in vec2 qt_TexCoord0;
layout(location = 0) out vec4 fragColor;
layout(std140, binding = 0) uniform buf {
    mat4 qt_Matrix;
    float qt_Opacity;
    vec4 bgcol;
};
layout(binding = 1) uniform sampler2D source;
void main() {
    vec4 p = texture(source, qt_TexCoord0);
    if (
        p.r == bgcol.r &&
        p.g == bgcol.g &&
        p.b == bgcol.b
    ) {
        fragColor = vec4(0, 0, 0, 0);
    }
    else {
        fragColor = p;
    }
}