forked from KolibriOS/kolibrios
40 lines
695 B
C
40 lines
695 B
C
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struct _rgb
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{
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byte r,g,b;
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void DwordToRgb();
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dword RgbToDword();
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};
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void _rgb::DwordToRgb(dword _dword)
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{
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r = _dword & 0xFF; _dword >>= 8;
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g = _dword & 0xFF; _dword >>= 8;
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b = _dword & 0xFF; _dword >>= 8;
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}
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dword _rgb::RgbToDword()
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{
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dword _b, _g;
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_b = b << 16;
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_g = g << 8;
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return _b + _g + r;
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}
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dword MixColors(dword _base, _overlying, byte a)
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{
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_rgb rgb1, rgb2, rgb;
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byte n_a;
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rgb1.DwordToRgb(_base);
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rgb2.DwordToRgb(_overlying);
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n_a = 255 - a;
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rgb.b = calc(rgb1.b*a/255) + calc(rgb2.b*n_a/255);
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rgb.g = calc(rgb1.g*a/255) + calc(rgb2.g*n_a/255);
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rgb.r = calc(rgb1.r*a/255) + calc(rgb2.r*n_a/255);
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return rgb.RgbToDword();
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}
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