用C语言读入信息头：
int ReadInfoHeader(char *filepath,BITMAPINFOHEADER *bmih)
{
FILE *fp;
//打开文件
fp=fopen(filepath,"rb");
if(!fp)
{
printf("Can not open the file:%s\n",filepath);
return -1;
}
//使文件指针跳过文件头（14字节）
fseek(fp,14,SEEK_SET);
//读入biSize
if(fread(&bmih->biSize,sizeof(DWORD),1,fp)!=1)
{
printf("Can not read biSize in the info header.\n");
fclose(fp);
return -1;
}
//读入biWidth
if(fread(&bmih->biWidth,sizeof(LONG),1,fp)!=1)
{
printf("Can not read biWidth in the info header.\n");
fclose(fp);
return -1;
}
//读入biHeight
if(fread(&bmih->biHeight,sizeof(LONG),1,fp)!=1)
{
printf("Can not read biHeight in the info header.\n");
fclose(fp);
return -1;
}
//读入biPlanes
if(fread(&bmih->biPlanes,sizeof(WORD),1,fp)!=1)
{
printf("Can not read biPlanes in the info header.\n");
fclose(fp);
return -1;
}
//读入biBitCount
if(fread(&bmih->biBitCount,sizeof(WORD),1,fp)!=1)
{
printf("Can not read biBitCount in the info header.\n");
fclose(fp);
return -1;
}
//读入biCompression
if(fread(&bmih->biCompression,sizeof(DWORD),1,fp)!=1)
{
printf("Can not read biCompression in the info header.\n");
fclose(fp);
return -1;
}
//读入biSizeImage
if(fread(&bmih->biSizeImage,sizeof(DWORD),1,fp)!=1)
{
printf("Can not read biSizeImage in the info header.\n");
fclose(fp);
return -1;
}
//读入biXPelsPerMeter
if(fread(&bmih->biXPelsPerMeter,sizeof(LONG),1,fp)!=1)
{
printf("Can not read biXPelsPerMeter in the info header.\n");
fclose(fp);
return -1;
}
//读入biYPelsPerMeter
if(fread(&bmih->biYPelsPerMeter,sizeof(LONG),1,fp)!=1)
{
printf("Can not read biYPelsPerMeter in the info header.\n");
fclose(fp);
return -1;
}
//读入biClrUsed
if(fread(&bmih->biClrUsed,sizeof(DWORD),1,fp)!=1)
{
printf("Can not read biClrUsed in the info header.\n");
fclose(fp);
return -1;
}
//读入biClrImportant
if(fread(&bmih->biClrImportant,sizeof(DWORD),1,fp)!=1)
{
printf("Can not read biClrImportant in the info header.\n");
fclose(fp);
return -1;
}
//关闭文件
fclose(fp);
return 0;
}
