kolibrios/programs/cmm/lib/patterns/rgb.h

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#ifndef INCLUDE_RGB_H
#define INCLUDE_RGB_H
:struct _rgb
{
byte b,g,r;
void DwordToRgb();
void SetRgb();
dword RgbToDword();
} rgb;
:void _rgb::DwordToRgb(dword _dword)
{
b = _dword & 0xFF; _dword >>= 8;
g = _dword & 0xFF; _dword >>= 8;
r = _dword & 0xFF; _dword >>= 8;
}
:void _rgb::SetRgb(dword _r, _g, _b)
{
r = _r;
g = _g;
b = _b;
}
:dword _rgb::RgbToDword()
{
dword _r, _g, _b;
_r = r << 16;
_g = g << 8;
_b = b;
return _r + _g + _b;
}
:dword MixColors(dword _base, _overlying, dword a)
{
_rgb rgb1, rgb2, rgb_final;
dword n_a;
if (a<0) || (a>255) {
debug("Wrong alpha param in MixColors()!");
debugval("alpha", a);
}
rgb1.DwordToRgb(_base);
rgb2.DwordToRgb(_overlying);
n_a = 255 - a;
rgb_final.b = calc(rgb1.b*a/255) + calc(rgb2.b*n_a/255);
rgb_final.g = calc(rgb1.g*a/255) + calc(rgb2.g*n_a/255);
rgb_final.r = calc(rgb1.r*a/255) + calc(rgb2.r*n_a/255);
return rgb_final.RgbToDword();
}
#endif