LPBYTE DibGRAY2RGBHandle(LPBYTE lpGrayDib){
LPBYTE lpRgbDib, lpSrc, lpDst;
int cx, cy;
if(!lpGrayDib || DIB_BPP(lpGrayDib) != 8)
return NULL;
cx = DIB_CX(lpGrayDib);
cy = DIB_CY(lpGrayDib);
if(!(lpRgbDib = DibCreateEmptyHandle(24, cx, cy)))
return NULL;
for(int y = 0; y < cy; y++){
lpSrc = DIB_DATA8XY(lpGrayDib, 0, y);
lpDst = DIB_DATA24XY(lpRgbDib, 0, y);
for(int x = 0; x < cx; x++){
*lpDst++ = *lpSrc;
*lpDst++ = *lpSrc;
*lpDst++ = *lpSrc;
lpSrc++;
}
}
return lpRgbDib;
}
LPBYTE DibRGB2GRAYHandle( LPBYTE lpRgbDib )
{
LPBYTE lpGrayDib, lpSrc, lpDst;
int x, y, cx, cy;
if ( !lpRgbDib || DIB_BPP( lpRgbDib ) != 24 )
return NULL;
cx = DIB_CX( lpRgbDib );
cy = DIB_CY( lpRgbDib );
if ( !(lpGrayDib = DibCreateEmptyHandle( 8, cx, cy )) )
return NULL;
for ( y = 0; y < cy; y++ )
{
lpSrc = DIB_DATA24XY( lpRgbDib, 0, y );
lpDst = DIB_DATA8XY( lpGrayDib, 0, y );
for ( x = 0; x < cx; x++ )
{
*lpDst++ = (*lpSrc + *(lpSrc+1) + *(lpSrc+2))/3;
lpSrc += 3;
}
}
return lpGrayDib;
}