写BITMAP标题 [英] writing BITMAP header

问题描述

i我试图将BITMAP文件分成4个部分

在这个过程中我们必须为每个部分写标题

怎么写标题

请帮帮我

i am致命需要

i am attempting to split a BITMAP file into 4 parts
in that process we have to write header for each part
how to write the header
please help me
i am in deadly need

推荐答案

HI，
告诉我你在这方面的尝试以及ru卡住的地方？

那么这里的人可以帮你...

谢谢

Raghuram

Tell me what you have attempted on this and where r u stuck?
Then people here can hep u...
Thanks
Raghuram

嗨大家好，


希望你能帮助我。我有一个0-255的数字数组，我想创建一个bmp文件，但只有灰色，所以0 = schwarz，255 =白色。


我已经能够使用以下方法写入文件：（c ++）

[PHP]

fstream data（filename，ios ::''out''| ios :: binary | ios :: trunc）;


if（！data.is_open（）|| data.bad（））

{

cout<< 错误：无法打开文件 << endl;

退出（-1）;

}


writeBin（数据，''B''）;

writeBin（数据，''M''）;

writeBin（数据，（长）高*宽* 3 + 52）;

writeBin （数据，（长）0）;

writeBin（数据，（长）52）;


writeBin（数据，（长）40）;

writeBin（数据，宽度）;

writeBin（数据，高度）;

writeBin（数据，（短）1）;

writeBin（数据，（短）8）;

writeBin（数据，（长）0）;

writeBin（数据，（长）0） ;

writeBin（数据，（长）0）;

writeBin（数据，（长）0）;

writeBin（数据，（ long）0）;

writeBin（data，（long）0）;


std :: vector< pix> :: iterator pixIterator = grauwert.begin（）;

for（pixIterator; pixIterator！= grauwert.end（）; pixIterator ++）

{

printf（"％i test"，（* pixIterator）.grauwert）;

writeBin（data，（* pixIterator）.grauwert）;

}

data.close（）;

[/ PHP]


[PHP]

struct pix

{

pix（）：grauwert（0），x（0），y（0）{}

int grauwert;

int x;

int y;

};


//写作方法：

模板< class T>

void writeBin（fstream& Out，T data）

{

Out .write（reinterpret_cast< char *>（& data），sizeof（T））;

}

[/ PHP]

所以我的问题是如何编辑我的标题，我可以使用我的矢量数字作为表示灰色值的数字？


如果您有任何建议，请随时回答:-)


bye

Hi Guys,

hopefully you can help me. I have an array of number from 0-255 and I would like to create a bmp file, but only grey colors so 0 = schwarz , 255 = white.

I am already able to write into the file with the following method: (c++)
[PHP]
fstream data(filename, ios::''out'' | ios::binary | ios::trunc);

if(!data.is_open() || data.bad())
{
cout << "error: cannot open file" << endl;
exit(-1);
}

writeBin(data, ''B'');
writeBin(data, ''M'');
writeBin(data, (long) height*width*3+52);
writeBin(data, (long) 0);
writeBin(data, (long) 52);

writeBin(data, (long) 40);
writeBin(data, width);
writeBin(data, height);
writeBin(data, (short) 1);
writeBin(data, (short) 8);
writeBin(data, (long) 0);
writeBin(data, (long) 0);
writeBin(data, (long) 0);
writeBin(data, (long) 0);
writeBin(data, (long) 0);
writeBin(data, (long) 0);

std::vector< pix >::iterator pixIterator = grauwert.begin();
for (pixIterator;pixIterator != grauwert.end();pixIterator++)
{
printf("%i test",(*pixIterator).grauwert);
writeBin(data, (*pixIterator).grauwert);
}
data.close();
[/PHP]

[PHP]
struct pix
{
pix():grauwert( 0 ),x(0),y(0) {}
int grauwert;
int x;
int y;
};

//the writing method:
template <class T>
void writeBin(fstream &Out, T data)
{
Out.write(reinterpret_cast<char*> (&data), sizeof(T));
}
[/PHP]
So my question is how can I edit my header, that I can use the numbers of my vector as numbers which indicate a grayvalue?

If you have any suggestions, please feel free to answer :-)

bye

明天我会回答这个问题（或者今晚晚些时候）。


Adrian

I''ll answer this tomorrow (or maybe later tonight).


Adrian

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