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zodiac_mouse.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2005 The ScummVM project
 * Copyright (C) 2002-2005 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.
 *
 * $Header: /cvsroot/scummvm/scummvm/backends/PalmOS/Src/zodiac_mouse.cpp,v 1.1.2.1 2005/10/18 02:11:14 sev Exp $
 *
 */

#include "be_zodiac.h"

void OSystem_PalmZodiac::setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor, int cursorTargetScale) {
      if (w == 0 || h == 0)
            return;

      _mouseCurState.w = w;
      _mouseCurState.h = h;

      _mouseHotspotX = hotspotX;
      _mouseHotspotY = hotspotY;

      _mouseKeyColor = keycolor;
      
#ifdef PALMOS_68K
      // set bitmap transparency
      WinSetDrawWindow(_mouseDataH);
      WinSetBackColor(_mouseKeyColor);
      WinEraseWindow();
      BmpSetTransparentValue(WinGetBitmap(_mouseDataH), _mouseKeyColor);

      if (w & 1) {
            // copy new cursor
            byte *dst = _mouseDataP;
            while (h--) {
                  memcpy(dst, buf, w);
                  dst += MAX_MOUSE_W;
                  buf += w;
            }

      } else {
            // copy new cursor
            BitmapTypeV1 nfo = {
                  w, h, w,
                  {0,0,0,0,0,0,0,0,0},
                  8, BitmapVersionOne, 0
            };

            BitmapTypeV3 *v3 = BmpCreateBitmapV3((BitmapType*)&nfo, kDensityDouble, (void *)buf, 0);
            WinDrawBitmap((BitmapPtr)v3, 0, 0);
            BmpDelete((BitmapPtr)v3);
      }
#else

      // copy new cursor
      byte *dst = _mouseDataP;
      while (h--) {
            memcpy(dst, buf, w);
            dst += MAX_MOUSE_W;
            buf += w;
      }
#endif
}

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

#ifdef PALMOS_ARM
      byte *src = _mouseDataP;            // Image representing the mouse
      byte *bak = _mouseBackupP;          // Surface used to backup the area obscured by the mouse
      byte *dst;                                // Surface we are drawing into
      byte color;
      int width;
#endif

      _mouseCurState.y = _mouseCurState.y >= _screenHeight ? _screenHeight - 1 : _mouseCurState.y;

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

      int draw_x = x;
      int draw_y = y;

      // clip the mouse rect
      if (x < 0) {
            w += x;
#ifdef PALMOS_ARM
            src -= x;
#endif
            x = 0;
      }
      if (y < 0) {
            h += y;
#ifdef PALMOS_ARM
            src -= y * MAX_MOUSE_W;
#endif
            y = 0;
      }
      if (w > _screenWidth - x)
            w = _screenWidth - x;
      if (h > _screenHeight - y)
            h = _screenHeight - y;

      // Quick check to see if anything has to be drawn at all
      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;

      // Backup the covered area draw the mouse cursor
#ifdef PALMOS_68K
      if (_overlayVisible) {
            WinSetDrawWindow(_screenH);
            WinDrawBitmap(WinGetBitmap(_mouseDataH), draw_x + _screenOffset.x, draw_y + _screenOffset.y);
            // force mouse redraw at each frame so that an extra buffer is not needed
            _mouseDrawn = false;

      } else {
            // backup...
            RectangleType r = {x, y, w, h};
            WinCopyRectangle(_offScreenH, _mouseBackupH, &r, 0, 0, winPaint);
            // ...and draw
            WinSetDrawWindow(_offScreenH);
            WinDrawBitmap(WinGetBitmap(_mouseDataH), draw_x, draw_y);
            _mouseDrawn = true;
      }
#else 
      if (_overlayVisible) {
            // where is the mouse ...
      } else {
            dst = _offScreenP + y * _screenWidth + x;

            do {
                  width = w;
                  do {
                        *bak++ = *dst;
                        color = *src++;
                        if (color != _mouseKeyColor)  // transparent, don't draw
                              *dst = color;
                        dst++;
                  } while (--width);

                  src += MAX_MOUSE_W - w;
                  bak += MAX_MOUSE_W - w;
                  dst += _screenWidth - w;
            } while (--h);
            _mouseDrawn = true;
      }
#endif
}

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

      // No need to do clipping here, since draw_mouse() did that already
#ifdef PALMOS_68K
      if (_overlayVisible) {
      } else {
            RectangleType r = {0, 0, _mouseOldState.w, _mouseOldState.h};
            WinCopyRectangle(_mouseBackupH, _offScreenH, &r, _mouseOldState.x, _mouseOldState.y, winPaint);
      }
#else
      if (_overlayVisible) {
      } else {
            int h = _mouseOldState.h;
            byte *dst, *bak = _mouseBackupP;
            dst = _offScreenP + _mouseOldState.y * _screenWidth + _mouseOldState.x;
            
            do {
                  memcpy(dst, bak, _mouseOldState.w);
                  bak += MAX_MOUSE_W;
                  dst += _screenWidth;
            } while (--h);
      }
#endif
}

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