dib.h

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/*
 *
 * dib.h
 *
   Copyright (C) 2006 Michael H. Overlin

   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
   
   Contact at [e-mail]
 */

#ifndef DIBSECTION_H
#define DIBSECTION_H

#include "myfilemap.h"

class DibFromMemory {
public:
	DibFromMemory(void) ;
	~DibFromMemory() ;

	BOOL Init(const void *pMemImage, DWORD dwImageSize) ;
	int StretchDIBits(HDC hdc, const RECT& rDest, const RECT& rSrc, DWORD dwRop) const ;
	int StretchDIBits(
		HDC hdc, int xDest, int yDest, int cxDest, int cyDest, 
		int xSrc, int ySrc, int cxSrc, int cySrc, DWORD dwRop
	) const ;

	const POINTD& GetLogPix(void) const ;
	const SIZED& GetSize_Inches(void) const ;
	const SIZE& GetSize_Pixels(void) const ;

protected:	
	BOOL m_bInited;
	const BITMAPINFO* m_pbi;
	const void *m_pBits;

	SIZE m_sz_Pixels;
	SIZED m_szd_Inches;
	POINTD m_ptdLogPix;
};

// CURRENTLY USED TO READ A BITMAP FILE FROM DISK
class DibFromFileMap : public DibFromMemory {
public:
	DibFromFileMap(void) ;
	~DibFromFileMap() ;

	BOOL Open(const tstring& tstrFileName) ;
	void Close(void) ;

	BOOL IsOpen(void) const { return m_mfm.IsOpen(); }

private:
	::MyFileMap m_mfm;
};

// CURRENTLY USED TO CREATE A BITMAP FILE ON DISK
class My24BPPDIBSection {
public:
	My24BPPDIBSection(void) ;
	~My24BPPDIBSection() ;


	HBITMAP Create(IN HDC hdc, IN const tstring& tstrFileName, 
					IN const SIZED& szd_Inches, IN const POINTD& ptdLogPix);

	void Close(void) ;

	BOOL IsOpen(void) const ;

	const POINTD& GetLogPix(void) const;
	const SIZED& GetSize_Inches(void) const;
	const SIZE& GetSize_Pixels(void) const;
	

	static BOOL TheirCalculateFileSize(
		OUT DWORD& dwFileSize,
		OUT SIZE& szImage_Pixels, 
		IN const SIZED& szd_Inches, 
		IN const POINTD& ptdLogPix
		);

	static BOOL TheirCalculateSizes(
		OUT DWORD& dwFileSize,
		OUT DWORD& dwPixelDataOffset, 
		OUT DWORD& dwImagePixelDataBytes,
		OUT SIZE& szImage_Pixels,
		IN const SIZED& szd_Inches, 
		IN const POINTD& ptdLogPix
		) ;

private:
	::MyFileReadWriteMap m_mfm;
	HBITMAP m_hbmp;
	POINTD m_ptdLogPix;
	SIZED m_szd_Inches;
	SIZE m_sz_Pixels;
};


#endif