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68 lines
1.8 KiB
C++
68 lines
1.8 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 SLUDGE_BACKDROP_H
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#define SLUDGE_BACKDROP_H
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#include "common/stream.h"
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#include "graphics/surface.h"
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#include "sludge/variable.h"
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namespace Sludge {
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/**
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* parallax layers can scroll at different speeds
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* to the background image, giving the illusion of
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* depth to a scene as it moves.
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*/
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class Parallax {
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public:
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struct ParallaxLayer {
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Graphics::Surface surface;
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int speedX, speedY;
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bool wrapS, wrapT;
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uint16 fileNum, fractionX, fractionY;
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int cameraX, cameraY;
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};
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typedef Common::List<ParallaxLayer *> ParallaxLayers;
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Parallax();
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~Parallax();
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void kill();
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bool add(uint16 v, uint16 fracX, uint16 fracY);
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void save(Common::WriteStream *fp);
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void draw();
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private:
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ParallaxLayers _parallaxLayers;
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inline int sortOutPCamera(int cX, int fX, int sceneMax, int boxMax) {
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return (fX == 65535) ? (sceneMax ? ((cX * boxMax) / sceneMax) : 0) : ((cX * fX) / 100);
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}
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};
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} // End of namespace Sludge
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#endif
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