vbagx/source/vba/simple2x.cpp

// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
// Copyright (C) 1999-2003 Forgotten
// Copyright (C) 2004 Forgotten and the VBA development team

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or(at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include "System.h"

void Simple2x(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
              u8 *dstPtr, u32 dstPitch, int width, int height)
{
  u8 *nextLine, *finish;

  nextLine = dstPtr + dstPitch;

  do
    {
      u32 *bP = (u32 *) srcPtr;
      u32 *dP = (u32 *) dstPtr;
      u32 *nL = (u32 *) nextLine;
      u32 currentPixel;

      finish = (u8 *) bP + ((width+2) << 1);
      currentPixel = *bP++;

      do
        {
#ifdef WORDS_BIGENDIAN
          u32 color = currentPixel >> 16;
#else
          u32 color = currentPixel & 0xffff;
#endif

          color = color | (color << 16);

          *(dP) = color;
          *(nL) = color;

#ifdef WORDS_BIGENDIAN
          color = currentPixel & 0xffff;
#else
          color = currentPixel >> 16;
#endif
          color = color| (color << 16);
          *(dP + 1) = color;
          *(nL + 1) = color;

          currentPixel = *bP++;

          dP += 2;
          nL += 2;
        }
      while ((u8 *) bP < finish);

      srcPtr += srcPitch;
      dstPtr += dstPitch << 1;
      nextLine += dstPitch << 1;
    }
  while (--height);
}

void Simple2x32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
                u8 *dstPtr, u32 dstPitch, int width, int height)
{
  u8 *nextLine, *finish;

  nextLine = dstPtr + dstPitch;

  do
    {
      u32 *bP = (u32 *) srcPtr;
      u32 *dP = (u32 *) dstPtr;
      u32 *nL = (u32 *) nextLine;
      u32 currentPixel;

      finish = (u8 *) bP + ((width+1) << 2);
      currentPixel = *bP++;

      do
        {
          u32 color = currentPixel;

          *(dP) = color;
          *(dP+1) = color;
          *(nL) = color;
          *(nL + 1) = color;

          currentPixel = *bP++;

          dP += 2;
          nL += 2;
        }
      while ((u8 *) bP < finish);

      srcPtr += srcPitch;
      dstPtr += dstPitch << 1;
      nextLine += dstPitch << 1;
    }
  while (--height);
}