raze-gles/source/common/utility/palentry.h

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#pragma once
#include <stdint.h>
struct PalEntry
{
PalEntry() = default;
PalEntry (uint32_t argb) { d = argb; }
operator uint32_t () const { return d; }
void SetRGB(PalEntry other)
{
d = other.d & 0xffffff;
}
PalEntry Modulate(PalEntry other) const
{
if (isWhite())
{
return other;
}
else if (other.isWhite())
{
return *this;
}
else
{
other.r = (r * other.r) / 255;
other.g = (g * other.g) / 255;
other.b = (b * other.b) / 255;
return other;
}
}
int Luminance() const
{
return (r * 77 + g * 143 + b * 37) >> 8;
}
void Decolorize() // this for 'nocoloredspritelighting' and not the same as desaturation. The normal formula results in a value that's too dark.
{
int v = (r + g + b);
r = g = b = ((255*3) + v + v) / 9;
}
bool isBlack() const
{
return (d & 0xffffff) == 0;
}
bool isWhite() const
{
return (d & 0xffffff) == 0xffffff;
}
PalEntry &operator= (const PalEntry &other) = default;
PalEntry &operator= (uint32_t other) { d = other; return *this; }
PalEntry InverseColor() const { PalEntry nc; nc.a = a; nc.r = 255 - r; nc.g = 255 - g; nc.b = 255 - b; return nc; }
#ifdef __BIG_ENDIAN__
PalEntry (uint8_t ir, uint8_t ig, uint8_t ib) : a(0), r(ir), g(ig), b(ib) {}
PalEntry (uint8_t ia, uint8_t ir, uint8_t ig, uint8_t ib) : a(ia), r(ir), g(ig), b(ib) {}
union
{
struct
{
uint8_t a,r,g,b;
};
uint32_t d;
};
#else
PalEntry (uint8_t ir, uint8_t ig, uint8_t ib) : b(ib), g(ig), r(ir), a(0) {}
PalEntry (uint8_t ia, uint8_t ir, uint8_t ig, uint8_t ib) : b(ib), g(ig), r(ir), a(ia) {}
union
{
struct
{
uint8_t b,g,r,a;
};
uint32_t d;
};
#endif
};
inline int Luminance(int r, int g, int b)
{
return (r * 77 + g * 143 + b * 37) >> 8;
}