Create gdiplus: bitmap through byte array

Source: Internet
Author: User

In VC, we use GDI + for Graphic programming. It is known that image data is stored in byte arrays. We need to use this byte to create a bitmap and then process it. In this process, we need to use istream to implement it,CodeAs follows:

Void bytetobitmap (byte * pimagedata, int nsize)
Hresult hr;
Status SR;

Hglobal = globalalloc (gmem_moveable, nsize );
Lpvoid pvdata = NULL;
Pvdata = globallock (hglobal );
Memcpy (pvdata, pimagedata, nsize );
Globalunlock (hglobal );

Istream * pstream = NULL;
HR = createstreamonhglobal (hglobal, true, & pstream );

Bitmap BMP (pstream );
Sr = BMP. getlaststatus (); // sr = OK, indicating that bitmap is successfully created.


Globalfree (hglobal); // after using bitmap, you need to release resources to avoid Memory leakage.

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