golgotha/i4/image/color.hh

/********************************************************************** <BR>
  This file is part of Crack dot Com's free source code release of
  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
  information about compiling & licensing issues visit this URL</a> 
  <PRE> If that doesn't help, contact Jonathan Clark at 
  golgotha_source@usa.net (Subject should have "GOLG" in it) 
***********************************************************************/

#ifndef I4_COLOR_HH
#define I4_COLOR_HH
#include "arch.hh"

inline w16 i4_32bpp_to_16bpp(w32 color)
{
  w32 r=(color>>16)&0xff, g=(color>>8)&0xff, b=(color>>0)&0xff;

  r=(r>>3); 
  g=(g>>2); 
  b=(b>>3);

  return (r<<(5+6)) | (g<<5) | b;
}


inline w16 i4_32bpp_to_15bpp(w32 color)
{
  w32 r=(color>>(16+3))   & (1 | 2 | 4 | 8 | 16);
  w32 g=(color>>(8+3))    & (1 | 2 | 4 | 8 | 16);
  w32 b=(color>>(0+3))    & (1 | 2 | 4 | 8 | 16);

  return (r<<(5+5)) | (g<<5) | b;
}

inline void i4_32bpp_to_rgb(w32 color, w8 &r, w8 &g, w8 &b)
{
  r=(color>>16)&0xff;
  g=(color>>8)&0xff;
  b=color&0xff;
}

inline w32 i4_15bpp_to_32bpp(w32 color)
{
  return ((((color & ((1 | 2 | 4 | 8 | 16)<<0))  >> 0) << (3+0)) |
          (((color & ((1 | 2 | 4 | 8 | 16)<<5))  >> 5) << (3+8)) |
          (((color & ((1 | 2 | 4 | 8 | 16)<<10)) >> 10) << (3+16)));
}

inline w32 i4_16bpp_to_32bpp(w32 color)
{
  w32 r=((color>>11) & (1|2|4|8|16))   <<3;
  w32 g=((color>>5)  & (1|2|4|8|16|32))<<2;
  w32 b=((color>>0)  & (1|2|4|8|16))   <<3;
  return (r<<16)|(g<<8)|b;
}

inline w32 i4_rgb_to_32bit(w8 r, w8 g, w8 b)
{
  return (r<<16) | (g<<8) | b;
}

#if (I4_SCREEN_DEPTH==15)
inline w16 i4_32bpp_to_screen(w32 color, w32 *pal)
{
  return i4_32bpp_to_15bpp(color);
}
#endif



#if (I4_SCREEN_DEPTH==16)
inline w16 i4_32bpp_to_screen(w32 color, w32 *pal)
{
  return i4_32bpp_to_16bpp(color);
}
#endif



#if (I4_SCREEN_DEPTH==32)
inline w16 i4_32bpp_to_screen(w32 color, w32 *pal)
{
  return color;
}
#endif


#if (I4_SCREEN_DEPTH==8)
#error need to solve this problem
inline w16 i4_32bpp_to_screen(w32 color, w32 *pal) 
{ return 0; }

#endif




#endif