//?ConvertBMP.cpp?:?定義控制臺應用程序的入口點。
//

#include?“stdafx.h“
#include?

#define?WIDTHBYTES（bits）?（（bits?+?31）/32*4）

BOOL?Convert8To24（RGBQUAD?*?pColorTable?BYTE*?srcImage?BYTE*?dstImage?LONG?imageWidthLONG?imageHeight）
{
	LONG?lLineBytes24?=?（（imageWidth*24+31）/32*4）;
	LONG?lLineBytes8?=?（（imageWidth*8+31）/32*4）;

	int?i?j?n;
	for（i?=?0;?i?	{
		for（j?=?0?n?=?0;?j?		{
			int?num?=?*（srcImage+lLineBytes8*i+j）;?//?獲取8位中調色板信息的偏移量
			*（dstImage+lLineBytes24*i+n）?=?pColorTable[num].rgbBlue;
			n++;
			*（dstImage+lLineBytes24*i+n）?=?pColorTable[num].rgbGreen;
			n++;
			*（dstImage+lLineBytes24*i+n）?=?pColorTable[num].rgbRed;
			n++;
		}
	}
	return?true;
}

void?ChangeBmpHeader（PBITMAPFILEHEADER?pbfheader?PBITMAPINFOHEADER?pbiheader?WORD?wType）
{
	
	pbiheader->biBitCount?=?wType;?//?24?或者?8
	pbiheader->biClrUsed?=?（wType?==?24）???0?:?256;
	pbiheader->biClrImportant?=?（wType?==?24）???0?:?256;
	pbfheader->bfOffBits?=?sizeof（BITMAPFILEHEADER）?+?sizeof（BITMAPINFOHEADER）?+?pbiheader->biClrUsed?*?sizeof（RGBQUAD）;?
	pbiheader->biSizeImage?=?WIDTHBYTES（pbiheader->biWidth?*?pbiheader->biBitCount）?*?pbiheader->biHeight;
	pbfheader->bfSize?=?pbfheader->bfOffBits?+?pbiheader->biSizeImage;
}

int?_tmain（int?argc?_TCHAR*?argv[]）
{
	FILE*?fpSrc?=?fopen（“1.bmp““rb+“）;
	if（fpSrc?==?NULL）?return?false;

	//?讀取BMP文件頭信息
	BITMAPFILEHEADER?bf;
	fread（&bf?sizeof（BITMAPFILEHEADER）?1?fpSrc）;
	
	//?讀取位圖信息頭
	BITMAPINFOHEADER?bi;
	fread（&bi?sizeof（BITMAPINFOHEADER）?1?fpSrc）;

	int?bmpWidth?=?bi.biWidth;
	int?bmpHeight?=?bi.biHeight;
	int?biBitCount?=?bi.biBitCount;

	RGBQUAD?*pColorTable;
	if（bi.biBitCount?==?8）?{
		pColorTable=new?RGBQUAD[256];
		fread（pColorTable?sizeof（RGBQUAD）?256?fpSrc）;
	}
	else?if（bi.biBitCount?==?24）{
		fclose（fpSrc）;
		return;
	}

	int?lineByte=（bmpWidth?*?biBitCount/8+3）/4*4;

	unsigned?char?*pBmpBuf;

	pBmpBuf?=?new?unsigned?char[lineByte?*?bmpHeight];
	fread（pBmpBuf?1?lineByte?*?bmpHeight?fpSrc）;

	//fclose（fpSrc）;
	//----------------------------------------------------------------
	//FILE*?fpDes?=?fopen（“2.bmp““wb“）;
	//if（fpDes?==?NULL）
	//{
	//	fclose（fpSrc）;
	//	return?FALSE;
	//}
	
	rewind（fpSrc）;
	ChangeBmpHeader（&bf?&bi?24）;
	fwrite（&bf?sizeof（BITMAPFILEHEADER）?1?fpSrc）;
	fwrite（&bi?sizeof（BITMAPINFOHEADER）?1?fpSrc）;

	int?lineByte24?=?（bmpWidth?*?bi.biBitCount/8+3）/4*4;
	unsigned?char?*dstImage;
	dstImage?=?new?unsigned?char[lineByte24?*?bmpHeight];

	Convert8To24（pColorTable?pBmpBuf?dstImage?bmpWidth?bmpHeight）;
	fwrite（dstImage?lineByte24?*?bmpHeight?1?fpSrc）;

	delete?[]?pBmpBuf;
	delete?[]?dstImage;
	fclose（fpSrc）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????2798??2017-07-20?18:20??ConvertBMP\ConvertBMP.cpp

?????文件???????4142??2017-07-12?18:42??ConvertBMP\ConvertBMP.vcxproj

?????文件???????1314??2017-07-12?18:42??ConvertBMP\ConvertBMP.vcxproj.filters

?????文件????????376??2017-07-12?19:00??ConvertBMP\ConvertBMP.vcxproj.user

?????文件???????1574??2017-07-12?18:42??ConvertBMP\ReadMe.txt

?????文件????????215??2017-07-12?18:42??ConvertBMP\stdafx.cpp

?????文件????????233??2017-07-12?18:42??ConvertBMP\stdafx.h

?????文件????????236??2017-07-12?18:42??ConvertBMP\targetver.h

?????目錄??????????0??2017-07-20?18:19??ConvertBMP

-----------?---------??----------?-----??----

????????????????10888????????????????????9