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zodiac_mouse.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-1-1/backends/platform/PalmOS/Src/zodiac_mouse.cpp $
 * $Id: zodiac_mouse.cpp 39028 2009-03-01 10:25:33Z chrilith $
 *
 */

#include "be_zodiac.h"

void OSystem_PalmZodiac::draw_mouse() {
      if (!_mouseDataP || _mouseDrawn || !_mouseVisible)
            return;

      byte *src = _mouseDataP;

      int x = _mouseCurState.x - _mouseHotspotX;
      int y = _mouseCurState.y - _mouseHotspotY;
      int w = _mouseCurState.w;
      int h = _mouseCurState.h;

      // clip the mouse rect
      if (y < 0) {
            src -= y * w;
            h += y;
            y = 0;
      }
      if (x < 0) {
            src -= x;
            w += x;
            x = 0;
      }

      if (h > _screenHeight - y)
            h = _screenHeight - y;
      if (w > _screenWidth - x)
            w = _screenWidth - x;

      if (w <= 0 || h <= 0)
            return;

      // store the bounding box so that undraw mouse can restore the area the
      // mouse currently covers to its original content
      _mouseOldState.x = x;
      _mouseOldState.y = y;
      _mouseOldState.w = w;
      _mouseOldState.h = h;

      byte color;
      int ww;

      if (_overlayVisible) {
            uint16 *bak = (uint16 *)_mouseBackupP;
            uint16 *pal = _cursorPaletteDisabled ? _nativePal : _mousePal;
            uint16 *dst;

            TwGfxLockSurface(_overlayP, (void **)&dst);
            dst += y * _screenWidth + x;

            do {
                  ww = w;
                  do {
                        *bak++ = *dst;
                        color = *src++;

                        // transparent, don't draw
                        if (color != _mouseKeyColor)
                              *dst = pal[color];
                        dst++;
                  } while (--ww);

                  src += _mouseCurState.w - w;
                  dst += _screenWidth - w;
            } while (--h);

            TwGfxUnlockSurface(_overlayP, true);

      } else {
            byte *bak = _mouseBackupP;
            byte *dst =_offScreenP + y * _screenWidth + x;

            do {
                  ww = w;
                  do {
                        *bak++ = *dst;
                        color = *src++;

                        // transparent, don't draw
                        if (color != _mouseKeyColor)
                              *dst = color;
                        dst++;
                  } while (--ww);

                  src += _mouseCurState.w - w;
                  dst += _screenWidth - w;
            } while (--h);
      }

      _mouseDrawn = true;
}

void OSystem_PalmZodiac::undraw_mouse() {
      if (!_mouseDrawn)
            return;

      int h = _mouseOldState.h;

      // no need to do clipping here, since draw_mouse() did that already
      if (_overlayVisible) {
            uint16 *dst;
            uint16 *bak = (uint16 *)_mouseBackupP;

            TwGfxLockSurface(_overlayP, (void **)&dst);
            dst += _mouseOldState.y * _screenWidth + _mouseOldState.x;

            do {
                  MemMove(dst, bak, _mouseOldState.w * 2);
                  dst += _screenWidth;
                  bak += _mouseOldState.w;
            } while (--h);

            TwGfxUnlockSurface(_overlayP, true);

      } else {
            byte *dst = _offScreenP + _mouseOldState.y * _screenWidth + _mouseOldState.x;
            byte *bak = _mouseBackupP;

            do {
                  MemMove(dst, bak, _mouseOldState.w);
                  dst += _screenWidth;
                  bak +=  _mouseOldState.w;
            } while (--h);
      }

      _mouseDrawn = false;
}

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