/* 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.
 *
 */
/**************************************************************************
 *                                     様様様様様様様様様様様様様様様様様 *
 *                                             Nayma Software srl         *
 *                    e                -= We create much MORE than ALL =- *
 *        u-        z$$$c        '.    様様様様様様様様様様様様様様様様様 *
 *      .d"        d$$$$$b        "b.                                     *
 *   .z$*         d$$$$$$$L        ^*$c.                                  *
 *  #$$$.         $$$$$$$$$         .$$$" Project: Roasted Moths........  *
 *    ^*$b       4$$$$$$$$$F      .d$*"                                   *
 *      ^$$.     4$$$$$$$$$F     .$P"     Module:  GfxCore.CPP..........  *
 *        *$.    '$$$$$$$$$     4$P 4                                     *
 *     J   *$     "$$$$$$$"     $P   r    Author:  Giovanni Bajo........  *
 *    z$   '$$$P*4c.*$$$*.z@*R$$$    $.                                   *
 *   z$"    ""       #$F^      ""    '$c                                  *
 *  z$$beu     .ue="  $  "=e..    .zed$$c                                 *
 *      "#$e z$*"   .  `.   ^*Nc e$""                                     *
 *         "$$".  .r"   ^4.  .^$$"                                        *
 *          ^.@*"6L=\ebu^+C$"*b."                                         *
 *        "**$.  "c 4$$$  J"  J$P*"    OS:  [ ] DOS  [X] WIN95  [ ] PORT  *
 *            ^"--.^ 9$"  .--""      COMP:  [ ] WATCOM  [X] VISUAL C++    *
 *                    "                     [ ] EIFFEL  [ ] GCC/GXX/DJGPP *
 *                                                                        *
 * This source code is Copyright (C) Nayma Software.  ALL RIGHTS RESERVED *
 *                                                                        *
 **************************************************************************/

#ifndef TONY_GFXCORE_H
#define TONY_GFXCORE_H

#include "common/system.h"
#include "tony/utils.h"

namespace Tony {

/****************************************************************************\
*       Prototipi di classi
\****************************************************************************/

//    Nome della classe           Albero genealogico     Astratto?
class RMGfxTask;             //                             Si
class RMGfxTaskSetPrior;     //     Task                    Si
class RMGfxBuffer;           //
class RMGfxSourceBuffer;     //     TaskP+[Buffer]          Si
class RMGfxTargetBuffer;     //     [Buffer]
class RMGfxSourceBufferPal;  //     Source                  Si
class RMGfxSourceBuffer4;    //     SourcePal
class RMGfxSourceBuffer8;    //     SourcePal
class RMGfxSourceBuffer16;   //     Source
class RMGfxWoodyBuffer;      //     Source16+Target
class RMGfxClearTask;        //     Task


/**
 * Graphics buffer
 */
class RMGfxBuffer {
protected:
    int m_dimx, m_dimy;
    byte *m_buf;
	byte *m_origBuf;
    bool m_bUseDDraw;

public:
    RMGfxBuffer();
    RMGfxBuffer(int dimx, int dimy, int nBpp, bool bUseDDraw = false);
    virtual ~RMGfxBuffer();

    // Attributes
    int Dimx() { return m_dimx; }
    int Dimy() { return m_dimy; }

    // Creation
    virtual void Create(int dimx, int dimy, int nBpp, bool bUseDDraw = false);
    virtual void Destroy(void);

    // Buffer access
    void Lock(void);
    void Unlock(void);

    // These are valid only if the buffer is locked
    operator byte *();
    operator void *();

	// Getting the offset for a given Y position
	void OffsetY(int nLines, int nBpp);
};

/**
 * Graphics primitive 
 */
class RMGfxPrimitive {
public:
    RMGfxTask *m_task;

protected:
    RMRect m_src;
    RMRect m_dst;

bool m_bStretch;
	byte m_bFlag;

public:
    RMGfxPrimitive() { m_bFlag = 0; m_task = NULL; m_src.SetEmpty(); m_dst.SetEmpty(); }

    RMGfxPrimitive(RMGfxTask *task) {
		m_task = task; m_bFlag = 0;
    }

	RMGfxPrimitive(RMGfxTask *task, const RMRect &src, RMRect &dst) {
		m_task = task; m_src = src; m_dst = dst; m_bFlag = 0;
		m_bStretch = (src.Width() != dst.Width() || src.Height() != dst.Height());
    }

    RMGfxPrimitive(RMGfxTask *task, const RMPoint &src, RMRect &dst) {
		m_task = task; m_src.TopLeft() = src; m_dst = dst; m_bFlag = 0;
    }

    RMGfxPrimitive(RMGfxTask *task, const RMPoint &src, RMPoint &dst) {
		m_task = task; m_src.TopLeft() = src; m_dst.TopLeft() = dst; m_bFlag = 0;
    }

    RMGfxPrimitive(RMGfxTask *task, const RMRect &src, RMPoint &dst) {
		m_task = task; m_src = src; m_dst.TopLeft() = dst; m_bFlag = 0;
    }

    RMGfxPrimitive(RMGfxTask *task, const RMRect &dst) {
		m_task = task; m_dst = dst; m_src.SetEmpty(); m_bFlag = 0;
    }

    RMGfxPrimitive(RMGfxTask *task, const RMPoint &dst) {
		m_task = task; m_dst.TopLeft() = dst; m_src.SetEmpty(); m_bFlag = 0;
    }

	virtual ~RMGfxPrimitive() { }

    void SetFlag(byte bFlag)		{ m_bFlag=bFlag; }
	void SetTask(RMGfxTask *task)   { m_task = task; }
    void SetSrc(const RMRect &src)        { m_src = src; }
    void SetSrc(const RMPoint &src)       { m_src.TopLeft() = src; }
    void SetDst(const RMRect &dst)        { m_dst = dst; }
    void SetDst(const RMPoint &dst)       { m_dst.TopLeft() = dst; }
    void SetStrecth(bool bStretch)	{ m_bStretch = bStretch; }

	bool HaveDst()					{ return !m_dst.IsEmpty(); }
	RMRect &Dst()					{ return m_dst; }

	bool HaveSrc()					{ return !m_src.IsEmpty(); }
	RMRect &Src()					{ return m_src; }

	// Flags
	bool IsFlipped()				{ return m_bFlag&1; }

	// Duplicate
	virtual RMGfxPrimitive* Duplicate() { return new RMGfxPrimitive(*this); }
};


/**
 * Graphic drawing task
 */
class RMGfxTask {
protected:
	int m_nPrior;
	int m_nInList;

public:
	// Costruttore standard
    RMGfxTask();
	virtual ~RMGfxTask() { }

	virtual int Priority();
    virtual void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) = 0;
    virtual bool RemoveThis();
		
	// Registration
	virtual void Register(void) { m_nInList++; }
	virtual void Unregister(void) { m_nInList--; assert(m_nInList >= 0); }
};


/**
 * Graphic drawing with priority
 */
class RMGfxTaskSetPrior : public RMGfxTask {
public:
	virtual ~RMGfxTaskSetPrior() { }
    void SetPriority(int nPrior);
};


/**
 * Task that cleans the destination buffer
 */
class RMGfxClearTask : public RMGfxTask {
public:
	virtual ~RMGfxClearTask() { }

	int Priority();
    void Draw(RMGfxTargetBuffer& bigBuf, RMGfxPrimitive* prim);
	bool RemoveThis();
};


/**
 * Task that draws a coloured box
 */
class RMGfxBox : public RMGfxTaskSetPrior { 
protected:
	uint16 wFillColor;

public:
	virtual ~RMGfxBox() { }

	void SetColor(byte r, byte g, byte b);
	void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
	bool RemoveThis();
};


/**
 * Buffer source for the design, which is a task. This is an abstract base.
 */
class RMGfxSourceBuffer : public virtual RMGfxBuffer, public RMGfxTaskSetPrior {
public:
    // Carica i dati della surface a basso livello
    virtual int Init(uint32 resID, int dimx, int dimy, bool bLoadPalette = false);
    virtual int Init(const byte *buf, int dimx, int dimy, bool bLoadPalette = false);
	virtual void Init(RMDataStream &ds, int dimx, int dimy, bool bLoadPalette = false);
	
	virtual ~RMGfxSourceBuffer();

protected:
	virtual void PrepareImage(void);
	bool Clip2D(int &x1, int &y1, int &u, int &v, int &width, int &height, bool bUseSrc, RMGfxTargetBuffer *buf);
	void OffsetY(int nLines) { RMGfxBuffer::OffsetY(nLines,Bpp()); }

public:
    virtual int Bpp() = 0;
};


/**
 * 16-bit colour source
 */
class RMGfxSourceBuffer16 : public RMGfxSourceBuffer {
protected:
	virtual void PrepareImage(void);
	bool m_bTrasp0;
	
public:
    RMGfxSourceBuffer16(bool bUseTrasp = false);
    RMGfxSourceBuffer16(int dimx, int dimy, bool bUseDDraw = false);
	virtual ~RMGfxSourceBuffer16();

	// Inizializzazione
	void Create(int dimx, int dimy, bool bUseDDraw = false);

    int Bpp();
    virtual void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
};


/**
 * Buffer source with palette
 */
class RMGfxSourceBufferPal : public RMGfxSourceBuffer {
protected:
	// The size of the palette is  (1<<Bpp())*4
	byte m_pal[256 * 3];
	uint16 m_palFinal[256];

	// Post process to prepare the palette for drawing
	virtual void PreparePalette(void);

public:
	virtual ~RMGfxSourceBufferPal();

	virtual int Init(const byte *buf, int dimx, int dimy, bool bLoadPalette = false);
	virtual void Init(RMDataStream& ds, int dimx, int dimy, bool bLoadPalette = false);
 
	int LoadPaletteWA(uint32 resID, bool bSwapped = false);
	int LoadPaletteWA(const byte *buf, bool bSwapped = false);
	int LoadPalette(uint32 resID);
	int LoadPalette(const byte *buf);
};


/**
 * Buffer source with a 256 colour palette
 */
class RMGfxSourceBuffer8 : public RMGfxSourceBufferPal {
protected:
	bool m_bTrasp0;
	
public:
	RMGfxSourceBuffer8(bool bTrasp0 = true);
	RMGfxSourceBuffer8(int dimx, int dimy, bool bUseDDraw = false);
	virtual ~RMGfxSourceBuffer8();

	// Inizializzazione
	void Create(int dimx, int dimy, bool bUseDDraw = false);

	int Bpp();
    virtual void Draw(RMGfxTargetBuffer& bigBuf, RMGfxPrimitive *prim);
};


/**
 * Buffer source with a 256 colour palette, and alpha blending
 */
class RMGfxSourceBuffer8AB : public RMGfxSourceBuffer8 {
protected:
	int CalcTrasp(int f, int b);

public:
	virtual ~RMGfxSourceBuffer8AB();
	virtual void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
};


/**
 * Buffer source with a 256 colour palette, RLE compressed
 */

class RMGfxSourceBuffer8RLE : public virtual RMGfxSourceBuffer8 {
protected:
	int alphaBlendColor;
	int alphaR, alphaB, alphaG;
	bool bNeedRLECompress;

protected:
	static byte MegaRLEBuf[];
		
	virtual void RLEWriteTrasp(byte *&cur, int rep) = 0;
	virtual void RLEWriteData(byte *&cur, int rep, byte *src) = 0;
	virtual void RLEWriteEOL(byte *&cur) = 0;
	virtual void RLEWriteAlphaBlend(byte *&cur, int rep) = 0;
	virtual void RLEDecompressLine(uint16 *dst, byte *src, int nStartSkip, int nLength) = 0;
	virtual void RLEDecompressLineFlipped(uint16 *dst, byte *src, int nStartSkip, int nLength) = 0;

	// Perform image compression in RLE
	void CompressRLE(void);
	
protected:
	// Overriding initialization methods
	virtual void PrepareImage(void);
	virtual	void PreparePalette(void);

public:
	RMGfxSourceBuffer8RLE();
	virtual ~RMGfxSourceBuffer8RLE();

	// Overload of the initialization method
	virtual void Init(RMDataStream& ds, int dimx, int dimy, bool bLoadPalette = false);
	virtual int Init(const byte *buf, int dimx, int dimy, bool bLoadPalette = false);

	// Draw image with RLE decompression
	void Draw(RMGfxTargetBuffer& bigBuf, RMGfxPrimitive* prim);

	// Sets the color that will be alpha blended
	void SetAlphaBlendColor(int color);

	// Warn if the data is already compressed
	void SetAlreadyCompressed(void);
};

class RMGfxSourceBuffer8RLEByte : public RMGfxSourceBuffer8RLE {
protected:
	void RLEWriteTrasp(byte *  &cur, int rep);
	void RLEWriteAlphaBlend(byte *  &cur, int rep);
	void RLEWriteData(byte *  &cur, int rep, byte *src);
	void RLEWriteEOL(byte *  &cur);
	void RLEDecompressLine(uint16 *dst, byte *src, int nStartSkip, int nLength);
	void RLEDecompressLineFlipped(uint16 *dst, byte *src, int nStartSkip, int nLength);

public:
	virtual ~RMGfxSourceBuffer8RLEByte();
};

class RMGfxSourceBuffer8RLEWord : public RMGfxSourceBuffer8RLE {
protected:
	void RLEWriteTrasp(byte *  &cur, int rep);
	void RLEWriteAlphaBlend(byte *  &cur, int rep);
	void RLEWriteData(byte *  &cur, int rep, byte *src);
	void RLEWriteEOL(byte *  &cur);
	virtual void RLEDecompressLine(uint16 *dst, byte *src, int nStartSkip, int nLength);
	virtual void RLEDecompressLineFlipped(uint16 *dst, byte *src, int nStartSkip, int nLength);

public:
	virtual ~RMGfxSourceBuffer8RLEWord();
};

class RMGfxSourceBuffer8RLEWordAB : public RMGfxSourceBuffer8RLEWord {
protected:
	virtual void RLEDecompressLine(uint16 *dst, byte *src, int nStartSkip, int nLength);

public:
	virtual ~RMGfxSourceBuffer8RLEWordAB();
};


/**
 * Buffer source with a 256 color palette, with anti-aliasing
 */
class RMGfxSourceBuffer8AA : public virtual RMGfxSourceBuffer8 {
protected:
	static byte MegaAABuf[];
	static byte MegaAABuf2[];
	byte *m_aabuf;

	// Calcola il buffer per l'antialiasing
	void CalculateAA(void);

	// Disegna l'AA
	void DrawAA(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);

protected:
	void PrepareImage(void);

public:
	RMGfxSourceBuffer8AA();
	virtual ~RMGfxSourceBuffer8AA();

	// Draw con antialiasing
	void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
};


class RMGfxSourceBuffer8RLEByteAA : public RMGfxSourceBuffer8RLEByte, public RMGfxSourceBuffer8AA {
protected:
	void PrepareImage(void);

public:
	void Draw(RMGfxTargetBuffer& bigBuf, RMGfxPrimitive* prim);

	// Overloaded initialisation methods
	virtual void Init(RMDataStream &ds, int dimx, int dimy, bool bLoadPalette = false);
    virtual int Init(const byte *buf, int dimx, int dimy, bool bLoadPalette = false);

	virtual ~RMGfxSourceBuffer8RLEByteAA();
};

class RMGfxSourceBuffer8RLEWordAA : public RMGfxSourceBuffer8RLEWord, public RMGfxSourceBuffer8AA {
protected:
	void PrepareImage(void);

public:
	void Draw(RMGfxTargetBuffer& bigBuf, RMGfxPrimitive* prim);

	// Overloaded initialisation method
	virtual void Init(RMDataStream& ds, int dimx, int dimy, bool bLoadPalette = false);
    virtual int Init(byte *buf, int dimx, int dimy, bool bLoadPalette = false);

	virtual ~RMGfxSourceBuffer8RLEWordAA();
};


/**
 * Source buffer with 16 colours
 */
class RMGfxSourceBuffer4 : public RMGfxSourceBufferPal {
public:
    RMGfxSourceBuffer4();
    RMGfxSourceBuffer4(int dimx, int dimy, bool bUseDDraw = false);

	// Initialisation
	void Create(int dimx, int dimy, bool bUseDDraw = false);

    int Bpp();
    virtual void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
};


/**
 * Destination buffer which manages it's own internal list of tasks
 */
class RMGfxTargetBuffer : public virtual RMGfxBuffer {
private:
static RMGfxClearTask taskClear;

	struct OTList {
		RMGfxPrimitive* prim;
		OTList* next;

		OTList();
		OTList(RMGfxPrimitive* pr) { prim=pr; }
	};

private:
	OSystem::MutexRef csModifyingOT;

protected:
	OTList *otlist;
	int m_otSize;

public:
	RMGfxTargetBuffer();
	virtual ~RMGfxTargetBuffer();

	// management of the OT list
	void ClearOT(void);
	void DrawOT(void);
	void AddPrim(RMGfxPrimitive *prim); // The pointer must be delted

	// Adds a task to clear the screen
	void AddClearTask(void);

	operator byte *() { return m_buf; }
	operator void *() { return (void *)m_buf; }
	operator uint16 *() { 
		// FIXME: This may not be endian safe
		return (uint16 *)m_buf; 
	}

	// Offseting buffer
	void OffsetY(int nLines) { RMGfxBuffer::OffsetY(nLines, 16); }
};


/**
 * Ring buffer, which is both source and by destination
 */
class RMGfxWoodyBuffer: public RMGfxSourceBuffer16, public RMGfxTargetBuffer {
public:
    RMGfxWoodyBuffer();
    RMGfxWoodyBuffer(int dimx, int dimy, bool bUseDDraw = false);
	virtual ~RMGfxWoodyBuffer();

    virtual void Draw(RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim);
};

} // End of namespace Tony

#endif