import.c

c代码

/*#############################################################################
 * 文件名：import.c
 * 功能：  一些基本的图像操作
 * modified by  [e-mail]
#############################################################################*/


#include "import.h"

#include <stdio.h>
#define DIB_HEADER_MARKER   ((FvsWord_t) ('M' << 8) | 'B')


/******************************************************************************
  * 功能：从文件中加载指纹图像
  * 参数：image       指纹图像
  *       filename    文件名
  * 返回：错误编号
******************************************************************************/
FvsError_t FvsImageImport(FvsImage_t image, const FvsString_t filename,
		FvsByte_t bmfh[14],BITMAPINFOHEADER *bmih,RGBQUAD *rgbq)
{
    FvsError_t ret = FvsOK;
    FvsByte_t*    buffer;
    FvsInt_t      pitch;
    FvsInt_t      height;
    FvsInt_t      width;
    FvsInt_t i,x,y;
    FvsFile_t	file;
//	FvsByte_t bmfh0[14];
//	BITMAPINFOHEADER bmih0;

    file	  = FileCreate();
	if(FileOpen(file,filename,FvsFileRead)==FvsFailure)
	{
		ret = FvsFailure;
	}

	if(FileRead(file,bmfh,14)!=14)
		ret = FvsFailure;
	
	if(*(FvsWord_t*)bmfh != DIB_HEADER_MARKER)
		ret = FvsFailure;

	if(FileRead(file,bmih,sizeof(BITMAPINFOHEADER))!=sizeof(BITMAPINFOHEADER))
		ret = FvsFailure;
	
	if(bmih->biBitCount!=8)
		ret = FvsFailure;

	if(FileRead(file,rgbq,sizeof(RGBQUAD)*256)!=sizeof(RGBQUAD)*256)
		ret = FvsFailure;

	if(ret==FvsFailure)
	{
		printf("File format or Read file error");
		return ret;
	}
	else
	{
		ret = ImageSetSize(image,(FvsInt_t)bmih->biWidth,(FvsInt_t)bmih->biHeight);
		if (ret==FvsOK)
		{
	    	/* 获得缓冲区 */
	    	buffer = ImageGetBuffer(image);
	    	pitch  = ImageGetPitch(image);
	    	height = ImageGetHeight(image);
	    	width  = ImageGetWidth(image);
	
			x = *(FvsDword_t*)(bmfh+10);
	    	/* 拷贝数据 */
	    	for (i=0; i<height; i++)
	    	{
				y = (height-1-i)*WIDTHBYTES(width*8);
                FileSeek(file,x+y);
				FileRead(file,buffer+i*pitch,pitch);
	    	}
		}
 
    }

	FileDestroy(file);    
    return ret;
}