Re: save DC as bitmap to file
Matthias Pospiech wrote:
DIBSection is what you want. A CBitmap does not contain the pixel
data, only a handle to data stored by Windows. A DIBSection does
contain the pixel data, in arrays of memory you can allocate, read and
write.
That may be, but hidden in the class. The class does not offer any
public (nor private) method to acces the data in x, y coordinates (as
far as I can see)
The whole set of methods is
BOOL SetBitmap(UINT nIDResource);
BOOL SetBitmap(LPCTSTR lpszResourceName);
BOOL SetBitmap(HBITMAP hBitmap
BOOL SetBitmap(LPBITMAPINFO lpBitmapInfo, LPVOID lpBits);
That's the one: lpBits would be your memory array containing pixel
values. See also the m_ppvBits within the class and note that this
pointer is used when calling CreateDIBSection to specify where the pixel
data is located.
I do not know what you mean by in-memory bitmap.
And yes it does display bmp files (from ressource oder hard disk) and
can read or write these to a file.
I however have an array created using vector that neads to be mapped to
a format that this class can understand.
You're going to have to study what that format is. It's a bit complex
to study due to the large number of options available. The pixels are
not accessed with x,y coordinates, they are accessed by converting x,y
to a linear array address using the CDIBSectionLite::BytesPerLine function.
--
Scott McPhillips [VC++ MVP]