mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-15 14:18:37 +00:00
54 lines
1.7 KiB
C++
54 lines
1.7 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.
|
|
*
|
|
*/
|
|
|
|
// Based on code by omergilad.
|
|
|
|
#ifndef GUI_ANIMATION_ANIMATION_H
|
|
#define GUI_ANIMATION_ANIMATION_H
|
|
|
|
#include "gui/animation/Animation.h"
|
|
|
|
namespace GUI {
|
|
|
|
class AlphaAnimation: public Animation {
|
|
public:
|
|
AlphaAnimation() {}
|
|
virtual ~AlphaAnimation() {}
|
|
float getEndAlpha() const { return _endAlpha; }
|
|
void setEndAlpha(float endAlpha) { _endAlpha = endAlpha; }
|
|
float getStartAlpha() const { return _startAlpha; }
|
|
void setStartAlpha(float startAlpha) { _startAlpha = startAlpha; }
|
|
|
|
protected:
|
|
virtual void updateInternal(Drawable* drawable, float interpolation) {
|
|
// Calculate alpha value based on properties and interpolation
|
|
drawable->setAlpha(_startAlpha * (1 - interpolation) + _endAlpha * interpolation);
|
|
}
|
|
|
|
float _startAlpha;
|
|
float _endAlpha;
|
|
};
|
|
|
|
} // End of namespace GUI
|
|
|
|
#endif /* GUI_ANIMATION_ANIMATION_H */
|