Creating an HICON from a byte array in C++?

Question

I have a PNG-encoded icon as a byte array in memory. What is the recommended way of creating an HICON object from this byte array?

Imaginary bonus points if you know a solution without ATL or GDI+... :)

create a stream out of it, and then load an icon from the stream... — Mordachai, Dec 17 '09 at 15:14

Ivan Krechetov · Answer 1 · 2009-12-17T15:47:04.527

4

HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, dataSize);
LPVOID pImage = GlobalLock(hMem);
memcpy(pImage, pngData, dataSize);
GlobalUnlock(hMem);

ATL::CComPtr<IStream> pStream;
CreateStreamOnHGlobal(hMem, TRUE, &pStream);

Gdiplus::Bitmap *pBitmap = new Gdiplus::Bitmap(pStream);
HICON YOUR_HICON = pBitmap->GetHICON();

edited Dec 17 '09 at 15:47

answered Dec 17 '09 at 15:23

Ivan Krechetov

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also is there any way of doing it without ATL or GDI+? – Epaga Dec 17 '09 at 15:33
Corrected: now you do have HICON. Without ATL or GDI+ — don't know Epaga, I'm not that hardcore anymore. – Ivan Krechetov Dec 17 '09 at 15:38
I don't see an Icon class in GDI+ - instead it would work with Gdiplus::Bitmap and then GetHICON. – Epaga Dec 17 '09 at 15:43
Right! Of course. Icon is in .NET, but not in GDI+. Sorry. Yes, Gdiplus::Bitmap and then GetHICON should work. – Ivan Krechetov Dec 17 '09 at 15:46

score 0 · Answer 2 · answered Dec 17 '09 at 17:53

0

It looks like you could do this with CreateBitmap and CreateIconIndirect, or maybe even just CreateIcon. Don't ask me for code because I'm not really familiar with this low-level graphics stuff.

answered Dec 17 '09 at 17:53

Luke

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Creating an HICON from a byte array in C++?

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