TexturePainter.h

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// Copyright (C) 2005 Dave Griffiths
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#ifndef N_TEXTURE
#define N_TEXTURE

#include <iostream>
#include <string>
#include <map>
#include "PNGLoader.h"
#include "PData.h"

using namespace std;

namespace Fluxus
{

class TextureState
{
    public:
    
    TextureState(): TexEnv(GL_MODULATE), Min(GL_LINEAR_MIPMAP_LINEAR), 
     Mag(GL_LINEAR_MIPMAP_LINEAR), WrapS(GL_REPEAT), WrapT(GL_REPEAT), WrapR(GL_REPEAT), 
     Priority(1), MinLOD(-1000), MaxLOD(1000) {}
    
    int TexEnv; 
    int Min;
    int Mag;
    int WrapS;
    int WrapT;
    int WrapR;
    dColour BorderColour; 
    float Priority; 
    dColour EnvColour; 
    float MinLOD;
    float MaxLOD;
};

class TexturePainter
{
public:
    static TexturePainter* Get()
    {
        if (m_Singleton==NULL) m_Singleton=new TexturePainter;
        return m_Singleton;
    }
    
    static void Shutdown()
    {
        if (m_Singleton!=NULL) delete m_Singleton;
    }
    
    void Initialise();
    
    void ClearCache();
        
    class CreateParams
    {
        public:
        CreateParams(): ID(-1), Type(GL_TEXTURE_2D), GenerateMipmaps(true), MipLevel(0), Border(0) {}

        int ID;
        int Type;
        bool GenerateMipmaps;
        int MipLevel;
        int Border;
    };

    
    unsigned int LoadTexture(const string &Filename, CreateParams &params);
    
    bool LoadPData(const string &Filename, unsigned int &w, unsigned int &h, TypedPData<dColour> &pixels);
    
    bool SavePData(const string &Filename, unsigned int w, unsigned int h, const TypedPData<dColour> &pixels);
    
    unsigned int MakeTexture(unsigned int w, unsigned int h, PData *data);
    
    
    bool SetCurrent(unsigned int *ids, TextureState *states);

    void DisableAll();
    
    void Dump();
    
private:
    class TextureDesc
    {
    public:
        TextureDesc() : Format(NONE) {}
        unsigned int Width;
        unsigned int Height;
        PixelFormat Format;
    };
    
    class CubeMapDesc
    {
    public:
        CubeMapDesc() { Positive[0]=0; Positive[1]=0; Positive[2]=0; 
                        Negative[0]=0; Negative[1]=0; Negative[2]=0; }
        unsigned int Positive[3];
        unsigned int Negative[3];
    };

    TexturePainter();
    ~TexturePainter();
    void ApplyState(int type, TextureState &state, bool cubemap);
    unsigned int LoadCubeMap(const string &Fullpath, CreateParams &params);
    void UploadTexture(TextureDesc desc, CreateParams params, const unsigned char *ImageData);
    static TexturePainter *m_Singleton;

    map<string,int> m_LoadedMap;
    map<string,int> m_LoadedCubeMap;
    map<unsigned int,TextureDesc> m_TextureMap;
    map<unsigned int,CubeMapDesc> m_CubeMapMap;
};

}

#endif

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