/*
** bitmap.h
**
**---------------------------------------------------------------------------
** Copyright 2008 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/


#ifndef __BITMAP_H__
#define __BITMAP_H__

#include "doomtype.h"

class FBitmap
{
	BYTE *data;
	int Width;
	int Height;
	int Pitch;
	bool FreeBuffer;

public:
	FBitmap()
	{
		data = NULL;
		Width = Height = 0;
		Pitch = 0;
		FreeBuffer = false;
	}

	FBitmap(BYTE *buffer, int pitch, int width, int height)
	{
		data = buffer;

		Pitch = pitch;
		Width = width;
		Height = height;
		FreeBuffer = false;
	}

	~FBitmap()
	{
		Destroy();
	}

	void Destroy()
	{
		if (data != NULL && FreeBuffer) delete [] data;
		data = NULL;
		FreeBuffer = false;
	}

	bool Create (int w, int h)
	{
		Pitch = w*4;
		Width = w;
		Height = h;
		data = new BYTE[4*w*h];
		FreeBuffer = true;
		return data != NULL;
	}


	virtual void CopyPixelDataRGB(int originx, int originy, const BYTE *patch, int srcwidth, 
								int srcheight, int step_x, int step_y, int rotate, int ct);
	virtual void CopyPixelData(int originx, int originy, const BYTE * patch, int srcwidth, int srcheight, 
								int step_x, int step_y, int rotate, PalEntry * palette);


};

bool ClipCopyPixelRect(int texwidth, int texheight, int &originx, int &originy,
									const BYTE *&patch, int &srcwidth, int &srcheight, 
									int &step_x, int &step_y, int rotate);

//===========================================================================
// 
// True color conversion classes for the different pixel formats
// used by the supported texture formats
//
//===========================================================================
struct cRGB
{
	static unsigned char R(const unsigned char * p) { return p[0]; }
	static unsigned char G(const unsigned char * p) { return p[1]; }
	static unsigned char B(const unsigned char * p) { return p[2]; }
	static unsigned char A(const unsigned char * p) { return 255; }
	static int Gray(const unsigned char * p) { return (p[0]*77 + p[1]*143 + p[2]*36)>>8; }
};

struct cRGBA
{
	static unsigned char R(const unsigned char * p) { return p[0]; }
	static unsigned char G(const unsigned char * p) { return p[1]; }
	static unsigned char B(const unsigned char * p) { return p[2]; }
	static unsigned char A(const unsigned char * p) { return p[3]; }
	static int Gray(const unsigned char * p) { return (p[0]*77 + p[1]*143 + p[2]*36)>>8; }
};

struct cIA
{
	static unsigned char R(const unsigned char * p) { return p[0]; }
	static unsigned char G(const unsigned char * p) { return p[0]; }
	static unsigned char B(const unsigned char * p) { return p[0]; }
	static unsigned char A(const unsigned char * p) { return p[1]; }
	static int Gray(const unsigned char * p) { return p[0]; }
};

struct cCMYK
{
	static unsigned char R(const unsigned char * p) { return p[3] - (((256-p[0])*p[3]) >> 8); }
	static unsigned char G(const unsigned char * p) { return p[3] - (((256-p[1])*p[3]) >> 8); }
	static unsigned char B(const unsigned char * p) { return p[3] - (((256-p[2])*p[3]) >> 8); }
	static unsigned char A(const unsigned char * p) { return 255; }
	static int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};

struct cBGR
{
	static unsigned char R(const unsigned char * p) { return p[2]; }
	static unsigned char G(const unsigned char * p) { return p[1]; }
	static unsigned char B(const unsigned char * p) { return p[0]; }
	static unsigned char A(const unsigned char * p) { return 255; }
	static int Gray(const unsigned char * p) { return (p[2]*77 + p[1]*143 + p[0]*36)>>8; }
};

struct cBGRA
{
	static unsigned char R(const unsigned char * p) { return p[2]; }
	static unsigned char G(const unsigned char * p) { return p[1]; }
	static unsigned char B(const unsigned char * p) { return p[0]; }
	static unsigned char A(const unsigned char * p) { return p[3]; }
	static int Gray(const unsigned char * p) { return (p[2]*77 + p[1]*143 + p[0]*36)>>8; }
};

struct cI16
{
	static unsigned char R(const unsigned char * p) { return p[1]; }
	static unsigned char G(const unsigned char * p) { return p[1]; }
	static unsigned char B(const unsigned char * p) { return p[1]; }
	static unsigned char A(const unsigned char * p) { return 255; }
	static int Gray(const unsigned char * p) { return p[1]; }
};

struct cRGB555
{
	static unsigned char R(const unsigned char * p) { return (((*(WORD*)p)&0x1f)<<3); }
	static unsigned char G(const unsigned char * p) { return (((*(WORD*)p)&0x3e0)>>2); }
	static unsigned char B(const unsigned char * p) { return (((*(WORD*)p)&0x7c00)>>7); }
	static unsigned char A(const unsigned char * p) { return p[1]; }
	static int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};

struct cPalEntry
{
	static unsigned char R(const unsigned char * p) { return ((PalEntry*)p)->r; }
	static unsigned char G(const unsigned char * p) { return ((PalEntry*)p)->g; }
	static unsigned char B(const unsigned char * p) { return ((PalEntry*)p)->b; }
	static unsigned char A(const unsigned char * p) { return ((PalEntry*)p)->a; }
	static int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};

enum ColorType
{
	CF_RGB,
	CF_RGBA,
	CF_IA,
	CF_CMYK,
	CF_BGR,
	CF_BGRA,
	CF_I16,
	CF_RGB555,
	CF_PalEntry
};


#endif