如何读入位图（三）

最新推荐文章于 2025-08-12 15:11:10 发布

转载最新推荐文章于 2025-08-12 15:11:10 发布 · 63 阅读

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原文链接：http://www.cnblogs.com/djcsch2001/archive/2011/02/21/1960202.html

文章标签：

#c/c++

本文介绍了一个使用C语言实现的函数，用于从BMP文件中读取信息头的各项参数，包括宽度、高度、位数等。该函数通过打开文件、跳过文件头并逐个读取信息头中的字段来完成任务。

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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;

}

转载于:https://www.cnblogs.com/djcsch2001/archive/2011/02/21/1960202.html