ximabmp.h

/*
 * File:	ximabmp.h
 * Purpose:	BMP Image Class Loader and Writer
 */
/* ==========================================================
 * CxImageBMP (c) 07/Aug/2001 Davide Pizzolato - www.xdp.it
 * For conditions of distribution and use, see copyright notice in ximage.h
 *
 * Special thanks to Troels Knakkergaard for new features, enhancements and bugfixes
 *
 * original CImageBMP  and CImageIterator implementation are:
 * Copyright:	(c) 1995, Alejandro Aguilar Sierra <asierra(at)servidor(dot)unam(dot)mx>
 *
 * ==========================================================
 */

#if !defined(__ximaBMP_h)
#define __ximaBMP_h

#include "ximage.h"

const int32_t RLE_COMMAND     = 0;
const int32_t RLE_ENDOFLINE   = 0;
const int32_t RLE_ENDOFBITMAP = 1;
const int32_t RLE_DELTA       = 2;

#if !defined(BI_RLE8)
 #define BI_RLE8  1L
#endif
#if !defined(BI_RLE4)
 #define BI_RLE4  2L
#endif

#if CXIMAGE_SUPPORT_BMP

class CxImageBMP: public CxImage
{
public:
	CxImageBMP(): CxImage(CXIMAGE_FORMAT_BMP) {};

	bool Decode(CxFile * hFile);
	bool Decode(FILE *hFile) { CxIOFile file(hFile); return Decode(&file); }

#if CXIMAGE_SUPPORT_ENCODE
	bool Encode(CxFile * hFile);
	bool Encode(FILE *hFile) { CxIOFile file(hFile); return Encode(&file); }
#endif // CXIMAGE_SUPPORT_ENCODE

protected:
	bool DibReadBitmapInfo(CxFile* fh, BITMAPINFOHEADER *pdib);
};

#define BFT_ICON   0x4349   /* 'IC' */
#define BFT_BITMAP 0x4d42   /* 'BM' */
#define BFT_CURSOR 0x5450   /* 'PT' */

#ifndef WIDTHBYTES
#define WIDTHBYTES(i)           ((unsigned)((i+31)&(~31))/8)  /* ULONG aligned ! */
#endif

#endif

#define DibWidthBytesN(lpbi, n) (uint32_t)WIDTHBYTES((uint32_t)(lpbi)->biWidth * (uint32_t)(n))
#define DibWidthBytes(lpbi)     DibWidthBytesN(lpbi, (lpbi)->biBitCount)

#define DibSizeImage(lpbi)      ((lpbi)->biSizeImage == 0 \
                                    ? ((uint32_t)(uint32_t)DibWidthBytes(lpbi) * (uint32_t)(uint32_t)(lpbi)->biHeight) \
                                    : (lpbi)->biSizeImage)

#define DibNumColors(lpbi)      ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
                                    ? (int32_t)(1 << (int32_t)(lpbi)->biBitCount)          \
                                    : (int32_t)(lpbi)->biClrUsed)

#define FixBitmapInfo(lpbi)     if ((lpbi)->biSizeImage == 0)                 \
												(lpbi)->biSizeImage = DibSizeImage(lpbi); \
                                if ((lpbi)->biClrUsed == 0)                   \
                                    (lpbi)->biClrUsed = DibNumColors(lpbi);   \

#endif