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/* 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 "titanic/star_control/surface_fader_base.h"
namespace Titanic {
CSurfaceFaderBase::CSurfaceFaderBase() : _index(-1), _count(32),
_videoSurface(nullptr) {
}
CSurfaceFaderBase::~CSurfaceFaderBase() {
delete _videoSurface;
}
void CSurfaceFaderBase::reset() {
_index = 0;
}
bool CSurfaceFaderBase::setupSurface(CScreenManager *screenManager, CVideoSurface *srcSurface) {
int width = srcSurface->getWidth();
int height = srcSurface->getHeight();
if (_videoSurface) {
if (width == _videoSurface->getWidth() && _videoSurface->getHeight())
// Allocated surface already matches new size
return true;
// Different sizes, so delete old surface
delete _videoSurface;
}
_videoSurface = screenManager->createSurface(width, height);
return true;
}
CVideoSurface *CSurfaceFaderBase::fade(CScreenManager *screenManager, CVideoSurface *srcSurface) {
if (_index == -1 || _index >= _count)
return srcSurface;
if (!_count && !setupSurface(screenManager, srcSurface))
return nullptr;
srcSurface->lock();
_videoSurface->lock();
CSurfaceArea srCSurfaceArea(srcSurface);
CSurfaceArea destSurfaceObj(_videoSurface);
// Copy the surface with fading
copySurface(srCSurfaceArea, destSurfaceObj);
srcSurface->unlock();
_videoSurface->unlock();
++_index;
return _videoSurface;
}
} // End of namespace Titanic
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