mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-19 16:18:45 +00:00
101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/* 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.
|
|
*
|
|
*/
|
|
|
|
#include "common/util.h"
|
|
|
|
#include "gob/backbuffer.h"
|
|
#include "gob/surface.h"
|
|
|
|
namespace Gob {
|
|
|
|
BackBuffer::BackBuffer() : _background(0), _saved(false) {
|
|
}
|
|
|
|
BackBuffer::~BackBuffer() {
|
|
delete _background;
|
|
}
|
|
|
|
bool BackBuffer::hasBuffer() const {
|
|
return _background != 0;
|
|
}
|
|
|
|
bool BackBuffer::hasSavedBackground() const {
|
|
return _saved;
|
|
}
|
|
|
|
void BackBuffer::trashBuffer() {
|
|
_saved = false;
|
|
}
|
|
|
|
void BackBuffer::resizeBuffer(uint16 width, uint16 height) {
|
|
trashBuffer();
|
|
|
|
if (_background && (_background->getWidth() == width) && (_background->getHeight() == height))
|
|
return;
|
|
|
|
delete _background;
|
|
|
|
_background = new Surface(width, height, 1);
|
|
}
|
|
|
|
bool BackBuffer::saveScreen(const Surface &dest, int16 &left, int16 &top, int16 &right, int16 &bottom) {
|
|
if (!_background)
|
|
return false;
|
|
|
|
const int16 width = MIN<int16>(right - left + 1, _background->getWidth ());
|
|
const int16 height = MIN<int16>(bottom - top + 1, _background->getHeight());
|
|
if ((width <= 0) || (height <= 0))
|
|
return false;
|
|
|
|
right = left + width - 1;
|
|
bottom = top + height - 1;
|
|
|
|
_saveLeft = left;
|
|
_saveTop = top;
|
|
_saveRight = right;
|
|
_saveBottom = bottom;
|
|
|
|
_background->blit(dest, _saveLeft, _saveTop, _saveRight, _saveBottom, 0, 0);
|
|
|
|
_saved = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool BackBuffer::restoreScreen(Surface &dest, int16 &left, int16 &top, int16 &right, int16 &bottom) {
|
|
if (!_saved)
|
|
return false;
|
|
|
|
left = _saveLeft;
|
|
top = _saveTop;
|
|
right = _saveRight;
|
|
bottom = _saveBottom;
|
|
|
|
dest.blit(*_background, 0, 0, right - left, bottom - top, left, top);
|
|
|
|
_saved = false;
|
|
|
|
return true;
|
|
}
|
|
|
|
} // End of namespace Gob
|