color.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 COLOR_H
#define COLOR_H
 
 
#include <stdint.h>
 
typedef uint32_t IntColor; // Uint32 in SDL
 
struct SDL_Color;
struct lua_State;
 
class CColor
{
public:
        CColor() : R(0), G(0), B(0), A(0) {}
        CColor(unsigned char r, unsigned char g, unsigned char b,
                   unsigned char a = 0) : R(r), G(g), B(b), A(a) {}
        CColor(const CColor &color) : R(color.R), G(color.G), B(color.B), A(color.A) {}
 
        void Parse(lua_State *l, int index = -1);
 
        operator SDL_Color() const;
 
        operator IntColor() const;
 
public:
        unsigned char R;       
        unsigned char G;       
        unsigned char B;       
        unsigned char A;       
};
 
 
#include <vector>
 
class CUnitColors
{
public:
        CUnitColors() {}
 
        void Clear();
 
        void Set(std::vector<CColor> &colors);
 
private:
        std::vector<CColor> Colors;
};
 
 
class PaletteSwap
{
public:
        PaletteSwap(unsigned int variable, unsigned char colorStart, unsigned char colorCount, unsigned char steps, unsigned char alternatives, std::vector<CColor> &colors);
        ~PaletteSwap();
 
        SDL_Color *GetColorsForPercentAndAlternative(unsigned int value, unsigned int max, unsigned int alt);
        
        unsigned int GetUnitVariableIndex() { return UnitVariableIndex; }
        unsigned int GetColorIndexStart() { return ColorIndexStart; }
        unsigned int GetColorCount() { return ColorCount; }
 
private:
        unsigned int UnitVariableIndex;
        unsigned char ColorIndexStart;
        unsigned char ColorCount;
        unsigned char Steps;
        unsigned char AlternativesCount;
        SDL_Color *Colors = nullptr;
};
 
IntColor InterpolateColor(IntColor color1, IntColor color2, float fraction);
 
 
#endif