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71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef TITANIC_SURFACE_FADER_BASE_H
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#define TITANIC_SURFACE_FADER_BASE_H
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#include "titanic/support/video_surface.h"
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#include "titanic/support/screen_manager.h"
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#include "titanic/star_control/surface_area.h"
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namespace Titanic {
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class CSurfaceFaderBase {
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private:
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/**
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* Sets up an internal surface to match the size of the specified one
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*/
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bool setupSurface(CScreenManager *screenManager, CVideoSurface *srcSurface);
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protected:
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/**
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* Create a faded version of the source surface at the given dest
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*/
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virtual void copySurface(CSurfaceArea &srcSurface, CSurfaceArea &destSurface) = 0;
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public:
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int _index;
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int _count;
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CVideoSurface *_videoSurface;
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public:
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CSurfaceFaderBase();
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virtual ~CSurfaceFaderBase();
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/**
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* Reset fading back to the start
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*/
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virtual void reset();
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/**
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* Creates a faded version of the passed source surface, based on a percentage
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* visibility specified by _index of _count
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*/
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virtual CVideoSurface *fade(CScreenManager *screenManager, CVideoSurface *srcSurface);
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/**
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* Returns true if a fade is in progress
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*/
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bool isActive() const { return _index != -1 && _index < _count; }
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};
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} // End of namespace Titanic
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#endif /* TITANIC_SURFACE_FADER_BASE_H */
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