#include </home/zeitlin/src/wx/github/interface/wx/mstream.h>
This class allows to use all methods taking a wxOutputStream reference to write to in-memory data.
例:
wxMemoryOutputStream stream; if (!my_wxImage.SaveFile(stream)) return; // now we can access the saved image bytes: wxStreamBuffer* theBuffer = stream.GetOutputStreamBuffer(); unsigned char byte; if (theBuffer->Read(byte, 1) != 1) return; // ... do something with 'byte'... // remember that ~wxMemoryOutputStream will destroy the internal // buffer since we didn't provide our own when constructing it
Public Member Functions | |
wxMemoryOutputStream (void *data=NULL, size_t length=0) | |
If data is NULL, then it will initialize a new empty buffer which will grow if required. | |
virtual | ~wxMemoryOutputStream () |
Destructor. | |
size_t | CopyTo (void *buffer, size_t len) const |
Allows you to transfer data from the internal buffer of wxMemoryOutputStream to an external buffer. | |
wxStreamBuffer * | GetOutputStreamBuffer () const |
Returns the pointer to the stream object used as an internal buffer for this stream. |
wxMemoryOutputStream::wxMemoryOutputStream | ( | void * | data = NULL , |
size_t | length = 0 |
||
) |
If data is NULL, then it will initialize a new empty buffer which will grow if required.
virtual wxMemoryOutputStream::~wxMemoryOutputStream | ( | ) | [virtual] |
Destructor.
If the buffer wasn't provided by the user, it will be deleted here.
size_t wxMemoryOutputStream::CopyTo | ( | void * | buffer, |
size_t | len | ||
) | const |
Allows you to transfer data from the internal buffer of wxMemoryOutputStream to an external buffer.
len specifies the size of the buffer.
wxStreamBuffer* wxMemoryOutputStream::GetOutputStreamBuffer | ( | ) | const |
Returns the pointer to the stream object used as an internal buffer for this stream.