/*		 
		note: compilation de ce fichier optimisée en vitesse
*/


//
// Modifications History
//
//$LB (20/12/2002) : 16bits to 24bits
//



#include "CObjBuffer.h"
#include "utils.h"
#include "colors.h"



OBJBITMAP_BUFFER classicBlit( OBJBITMAP_BUFFER bDest, OBJBITMAP_BUFFER bSrc,
					    int DestBPL, int SrcBPL,
					    int destX, int destY, int srcX, int srcY, int width, int height,
						int transparency)
{
    int dcx, dcy, scx, scy, color;
	unsigned char r, g, b;
	register int i, j;
	register OBJBITMAP_BUFFER BufS;
	register OBJBITMAP_BUFFER BufD;

//***********************************
#if DEBUG_LIB2D
MMechostr (0, "classicBlit\n");
#endif
//***********************************


	dcy = destY * DestBPL + (destX * 3);
  scy = srcY  * SrcBPL  + (srcX * 3);
  
  if (bDest != 0)
  {
	  if ( transparency == NIL ) 
	  {            
	     BufS = ((OBJBITMAP_BUFFER) bSrc ) + scy ;
	     BufD = ((OBJBITMAP_BUFFER) bDest ) + dcy ;

	     for ( j = 0 ; j < height ; j ++ )
	     {                 
				  memcpy( BufD, BufS, width*3) ;
				  BufD += DestBPL ;
				  BufS += SrcBPL ;
	     }
	  }
	  else
	  {
		  for ( j = 0 ; j < height ; j ++ )
		  {
			  dcx = dcy ;
			  scx = scy ;
			  for ( i = 0 ; i < width ; i ++ , dcx +=3 , scx +=3 )
			  {
				  b = bSrc[ scx ];
				  g = bSrc[ scx+1 ];
				  r = bSrc[ scx+2 ];

				  color = _COLOR_BGR_TO_I (b, g, r);

				  if (color != transparency)
				  {
					  bDest[ dcx ] = b;
					  bDest[ dcx+1 ] = g;
					  bDest[ dcx+2 ] = r;
				  }
			  }
			  dcy += DestBPL;
			  scy += SrcBPL;
		  }
    }
	}


//***********************************
#if DEBUG_LIB2D
MMechostr (0, "classicBlit end\n");
#endif
//***********************************

	return bDest;
}