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os5_overlay.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2006 The ScummVM project
 * Copyright (C) 2002-2006 Chris Apers - PalmOS Backend
 *
 * 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
 * of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/backends/platform/PalmOS/Src/os5_overlay.cpp $
 * $Id: os5_overlay.cpp 22911 2006-06-04 12:12:24Z sev $
 *
 */

#include "be_os5.h"
#include "common/endian.h"

void OSystem_PalmOS5::showOverlay() {
      // hide fight indicator
      draw_osd(kDrawFight, _screenDest.w - 34, _screenDest.h + 2, false);

      undraw_mouse();
      _overlayVisible = true;
      clearOverlay();   
}

void OSystem_PalmOS5::hideOverlay() {
      undraw_mouse();
      _overlayVisible = false;
      _redawOSD = true;
}

void OSystem_PalmOS5::clearOverlay() {
      if (!_overlayVisible)
            return;

      byte *src = _offScreenP;
      int16 *dst =  _overlayP;
      int cnt = _screenWidth * _screenHeight;
      do {
            *dst++ = _nativePal[*src++];
      } while (--cnt);
}

void OSystem_PalmOS5::grabOverlay(OverlayColor *buf, int pitch) {
      OverlayColor *src = _overlayP;
      int h = _screenHeight;
      do {
            memcpy(buf, src, _screenWidth * 2);
            src += _screenWidth;
            buf += pitch;
      } while (--h);
}

void OSystem_PalmOS5::copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h) {
      if (w == 0 || h == 0)
            return;

      OverlayColor *dst = _overlayP + x + y * _screenWidth;
      do {
            memcpy(dst, buf, w * 2);
            dst += _screenWidth;
            buf += pitch;
      } while (--h);
}

OverlayColor OSystem_PalmOS5::RGBToColor(uint8 r, uint8 g, uint8 b) {
      return gfxMakeDisplayRGB(r, g, b);
}

void OSystem_PalmOS5::colorToRGB(OverlayColor color, uint8 &r, uint8 &g, uint8 &b) {
#ifdef PALMOS_68K
      color = SWAP_BYTES_16(color);
#endif
      r = ((color >> 8) & 0xF8);
      g = ((color >> 3) & 0xFC);
      b = ((color << 3) & 0xF8);
}

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