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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2005 The ScummVM project
*
* 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.
*
* $Header$
*
*/
#include "common/stdafx.h"
#include "palm.h"
bool OSystem_PALMOS::showMouse(bool visible) {
if (_mouseVisible == visible)
return visible;
bool last = _mouseVisible;
_mouseVisible = visible;
if (visible)
draw_mouse();
else
undraw_mouse();
return last;
}
void OSystem_PALMOS::warpMouse(int x, int y) {
set_mouse_pos(x, y);
}
void OSystem_PALMOS::set_mouse_pos(int x, int y) {
if (x != _mouseCurState.x || y != _mouseCurState.y) {
_mouseCurState.x = x;
_mouseCurState.y = y;
undraw_mouse();
}
}
void OSystem_PALMOS::setMouseCursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y, byte keycolor) {
_mouseCurState.w = w;
_mouseCurState.h = h;
_mouseHotspotX = hotspot_x;
_mouseHotspotY = hotspot_y;
_mouseKeyColor = keycolor;
if (_mouseDataP)
free(_mouseDataP);
_mouseDataP = (byte *)malloc(w * h);
memcpy(_mouseDataP, buf, w * h);
undraw_mouse();
}
void OSystem_PALMOS::draw_mouse() {
if (_mouseDrawn || !_mouseVisible)
return;
_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;
byte color;
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
int width;
// clip the mouse rect, and addjust the src pointer accordingly
if (x < 0) {
w += x;
src -= x;
x = 0;
}
if (y < 0) {
h += y;
src -= y * _mouseCurState.w;
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;
// Draw the mouse cursor; backup the covered area in "bak"
if (!_overlayVisible) {
dst = _offScreenP + y * _offScreenPitch + x;
while (h > 0) {
width = w;
while (width > 0) {
*bak++ = *dst;
color = *src++;
if (color != _mouseKeyColor) // transparent, don't draw
*dst = color;
dst++;
width--;
}
src += _mouseCurState.w - w;
bak += MAX_MOUSE_W - w;
dst += _offScreenPitch - w;
h--;
}
} else {
int offset = y * _screenWidth + x;
dst = _tmpScreenP;
while (h > 0) {
width = w;
while (width > 0) {
*bak++ = *(dst + offset);
color = *src++;
if (color != _mouseKeyColor) // transparent, don't draw
DmWrite(dst, offset, &color, 1);
offset++;
width--;
}
src += _mouseCurState.w - w;
bak += MAX_MOUSE_W - w;
offset += _screenWidth - w;
h--;
}
}
// Finally, set the flag to indicate the mouse has been drawn
_mouseDrawn = true;
}
void OSystem_PALMOS::undraw_mouse() {
if (!_mouseDrawn)
return;
_mouseDrawn = false;
byte *dst, *bak = _mouseBackupP;
const int old_mouse_x = _mouseOldState.x;
const int old_mouse_y = _mouseOldState.y;
const int old_mouse_w = _mouseOldState.w;
int old_mouse_h = _mouseOldState.h;
// No need to do clipping here, since draw_mouse() did that already
if (!_overlayVisible) {
dst = _offScreenP + old_mouse_y * _offScreenPitch + old_mouse_x;
do {
memcpy(dst, bak, old_mouse_w);
bak += MAX_MOUSE_W;
dst += _offScreenPitch;
} while (--old_mouse_h);
} else {
int offset = old_mouse_y * _screenWidth + old_mouse_x;
do {
DmWrite(_tmpScreenP, offset, bak, old_mouse_w);
bak += MAX_MOUSE_W;
offset += _screenWidth;
} while (--old_mouse_h);
}
}
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