/*
 * File:	cimageb.h
 * Purpose:	Declaration of the Platform Independent Image Class
 * Author:	Alejandro Aguilar Sierra
 * Created:	1995
 * Description: This class adds drawing routines and color map management.
 *
 * Copyright:	(c) 1995, Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
 */
#ifndef CIMAGEBH
#define CIMAGEBH

#include "stdafx.h"
#include "cmap.h"

#define CIMAGE_COLORS DIB_PAL_COLORS

#define CIMAGE_SUPPORT_BMP 1
#define CIMAGE_SUPPORT_GIF 1
#define CIMAGE_SUPPORT_JPEG 1
#define CIMAGE_SUPPORT_PNG  1
#define CIMAGE_SUPPORT_XPM  1

#ifndef byte
typedef unsigned char byte;
#endif

#ifdef WIN32
typedef byte* ImagePointerType;
#else
typedef byte huge* ImagePointerType;
#endif

typedef struct
{
	byte red;
	byte green;
   byte blue;
} rgb_color_struct;

#ifndef byte
typedef unsigned char byte;
#endif

#define COLORTYPE_PALETTE	1
#define COLORTYPE_COLOR		2
#define COLORTYPE_ALPHA		4

class CImageImpl
{
protected:
  ImagePointerType RawImage;  		//  Image data

  int Width, Height;   		//  Dimensions
  int Depth;	 				// (bits x pixel)
  int ColorType;				// Bit 1 = Palette used
									// Bit 2 = Color used
									// Bit 3 = Alpha used

  long EffWidth;	 			// Effective Width
  LPBITMAPINFOHEADER lpbi;
  int bgindex;
  CImagePalette* imagePalette;

friend class CImageIterator;
public:
// Constructors
  CImageImpl();
  CImageImpl(int width, int height, int depth, int colortype=-1);
  CImageImpl( const CImageImpl *ima );

  // Destructor
  virtual ~CImageImpl();

  //  Image Information
  int  GetWidth( void ) const { return Width; };
  int  GetHeight( void ) const { return Height; };
  int  GetDepth( void ) const { return Depth; };
  int  GetColorType( void ) const { return ColorType; };

  virtual BOOL Inside(int x, int y);

  virtual void Create(int width, int height, int deep, int colortype=-1);

  // Drawing routines
  BOOL Draw(CDC *dc, int x=0, int y=0, int dx=-1, int dy=-1, int xs=0, int ys=0);
  BOOL Stretch(CDC *dc, int xd=0, int yd=0, int dxd=-1, int dyd=-1,
	 int xs=0, int ys=0, int dxs=-1, int dys=-1);

  virtual int  GetIndex(int x, int y);
  virtual BOOL GetRGB(int x, int y, byte* r, byte* g, byte* b);

  virtual BOOL SetIndex(int x, int y, int index);
  virtual BOOL SetRGB(int x, int y, byte r, byte g, byte b);

// ColorMap settings
  BOOL SetPalette(CImagePalette* palette);
  BOOL SetPalette(int n, rgb_color_struct *rgb_struct);
  BOOL SetPalette(int n, byte *r, byte *g=0, byte *b=0);
  CImagePalette* GetPalette() const { return imagePalette; }
  
  inline ImagePointerType GetRawImage() { return RawImage; }
  inline LPBITMAPINFOHEADER GetBits() { return lpbi; }
  inline long GetEffWidth() { return EffWidth; }

  virtual BOOL ReadFile(const CString& imageFileName="") { return FALSE; }
  virtual BOOL SaveFile(const CString& imageFileName="") { return FALSE; }

  // 'Copy' the raw image data et. from 'from' to 'this'. NULLify these attributes
  // in 'from' so we can then delete it without deleting the raw image data.
  void TransferBits(CImageImpl *from);
};


inline
CImageImpl::CImageImpl(): /*ImaBase(),*/ imagePalette(0), lpbi(0)
{
  RawImage = 0; 
  Width = Height = 0;
  Depth = 0;
  ColorType = 0;
  bgindex = -1;
}

inline
CImageImpl::CImageImpl(int width, int height, int depth, int colortype): imagePalette(0), lpbi(0)
{
  Width = Height = 0;
  Depth = 0;
  ColorType = 0;
  bgindex = -1;
  RawImage = 0;
  Create(width, height, depth, colortype);
}


inline
CImageImpl::CImageImpl( const CImageImpl *ima ): imagePalette(0), lpbi(0)
{
  bgindex = -1;

  if (ima) {
	 Create(ima->GetWidth(), ima->GetHeight(), ima->GetDepth(), ima->GetColorType());
     if (ima->GetPalette())
	   SetPalette(new CImagePalette(ima->GetPalette()));
  }
}

inline
BOOL CImageImpl::Inside(int x, int y)
{
  return (0<=y && y<Height && 0<=x && x<Width);
}

#endif