namespace Blend {
 
// Alphabetically ordered blend modes.
enum DLLPUBLIC Op
{
    ArithmeticMean, // (A+B)/2
    ColorBurn,      // 1 - (1-B)/A
    ColorDodge,     // B/(1-A)
    Difference,     // abs(A-B)
    Divide,         // A/B
    Exclusion,      // A+B-2AB
    Geometric,      // 2AB/(A+B)
    GeometricMean,  // sqrt(AB)
    HardLight,      // if(A<0.5):2AB, else 1 - 2(1-A)(1-B)
    Hypotenuse,     // sqrt(A*A + B*B)
    LinearBurn,     // A+B-1
    LinearLight,    // 2A+B-1
    Max,            // max(A,B)
    Min,            // min(A,B)
    Minus,          // A-B
    Multiply,       // AB
    Normal,         // A
    Overlay,        // hard_light (B,A)
    PinLight,       // max(2A-1, min(B, 2A))
    Screen,         // A+B-A*B if A and B are in range 0-1, otherwise max(A,B)
    SoftLight,      // if (A<0.5): B*Screen(2A,B), else B+(2A-1)(D-B),
                    // where D=sqrt(B) if (B>0.25), otherwise ((16B-12)B+4)B.
    VividLight      // 1-(1-B)/2A if A<0.5, else B / (2(1-A))
};
 
}

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