viewport.h

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//                        T H E   W A R   B E G I N S
//         Stratagus - A free fantasy real time strategy game engine
//
//
//      (c) Copyright 2012 by Joris Dauphin
//
//      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; only version 2 of the License.
//
//      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., 59 Temple Place - Suite 330, Boston, MA
//      02111-1307, USA.
//
 
#ifndef VIEWPORT_H
#define VIEWPORT_H
 
#include "fow.h"
#include "vec2i.h"
class CUnit;
 
class CViewport
{
public:
        CViewport();
        ~CViewport();
 
        bool IsInsideMapArea(const PixelPos &screenPixelPos) const;
 
        PixelPos ScreenToMapPixelPos(const PixelPos &screenPixelPos) const;
        // Convert map pixel coordinates into screen coordinates
        PixelPos MapToScreenPixelPos(const PixelPos &mapPixelPos) const;
 
        Vec2i ScreenToTilePos(const PixelPos &screenPixelPos) const;
        PixelPos TilePosToScreen_TopLeft(const Vec2i &tilePos) const;
        PixelPos TilePosToScreen_Center(const Vec2i &tilePos) const;
 
        SDL_Surface* GetFogSurface() {
                return this->FogSurface;
        }
 
        void Set(const Vec2i &tilePos, const PixelDiff &offset);
        void Center(const PixelPos &mapPixelPos);
 
        void SetClipping() const;
 
        void Draw();
        void DrawBorder() const;
        bool AnyMapAreaVisibleInViewport(const Vec2i &boxmin, const Vec2i &boxmax) const;
 
        bool Contains(const PixelPos &screenPos) const;
 
        void Restrict(int &screenPosX, int &screenPosY) const;
        void Clean();
 
        static bool isGridEnabled()
        {
                return CViewport::ShowGrid;
        }
 
        static void EnableGrid(const bool value)
        {
                CViewport::ShowGrid = value;
        }
 
 
        PixelSize GetPixelSize() const;
        const PixelPos &GetTopLeftPos() const { return TopLeftPos;}
        const PixelPos &GetBottomRightPos() const { return BottomRightPos;}
private:
        void Set(const PixelPos &mapPixelPos);
        void DrawMapGridInViewport() const;
        void DrawMapBackgroundInViewport() const;
        void DrawMapFogOfWar();
        void AdjustFogSurface();
        void CleanFog();
 
public:
        //private:
        PixelPos TopLeftPos;      
        PixelPos BottomRightPos;  
 
public:
        Vec2i MapPos;             
        PixelDiff Offset;         
        int MapWidth;             
        int MapHeight;            
 
        CUnit *Unit;              
private:
        SDL_Surface *FogSurface { nullptr }; 
        static bool ShowGrid;
 
};
 
 
 
#endif // VIEWPORT_H