How to show PNG Images with no window?????

[ml1969]

Hello,

I have learnd alot... but there ist still a question / problem....

I want to show an image-file, perhaps a png file with transparency.

I am able to show a bitmapfile, which is include in a window

Code: [Select]

hbit = SHLoadDIBitmap(hStr);

HWND hWnd;


hWnd = CreateWindow(L"imgClass", L"Dialog",  WS_VISIBLE | SS_BITMAP,  0,  0,  50, 50,  NULL, NULL, hInstance, NULL);

HWND imgCtrl = CreateWindow( _T("STATIC"), NULL, SS_CENTERIMAGE | SS_BITMAP | WS_CHILD | WS_VISIBLE, 0, 0 , 50, 50, hWnd, NULL, NULL, NULL);

SendMessage(imgCtrl,STM_SETIMAGE, (WPARAM)IMAGE_BITMAP,(LPARAM)hbit);
.....

So is it possible to show a png-file on the screen with no window(form)? Cause the background of the window is grey and not transparent?

Michael

[Stefan Pendl]

JohnF has an example of using GDI+ to load and display images at his site.

[ml1969]

Hello,

you mean that http://www.johnfindlay.plus.com/pellesc/GdiPlus/GdiPlus.html

Will this work on an PNA?  WinCe 4 ?

Ok I look there thanks

[Romashka]

Another possibility is to make a shaped window (if you don't need it to be semitransparent).
See the following URL for an algorithm for making a region from a bitmap:
http://www.vbaccelerator.com/codelib/winstyle/bmpwinsh.htm

You can also use layered windows but I am not sure if they are supported on WinCE (and they are not supported on Windows 9x/NT too).

[Kaljj]

Hello Michael,

I thing it not a great problem, if you only want to show the picture.
At first load the sample for a fullscreen from PelleC - homepage.
After then load the picture from the file with SHLoadImageFile
It's work with gif,jpg,png,ico and bmp
So you get a handle to a bitmap and show it with StretchBlt.

Kaljj

[ml1969]

Hello,


(I´m also from germany  )

The fullscreen-sample requires the aygshell, which is NOT represented on an PNA (wince 5)
This is a problem I meet sometimes, this makes some problems much difficult.


Michael

[Kaljj]

Hello Michael,

have you found a way to show the PNG.
i have read in the last time about the GAPI.
Look at the MSDN there show you a example to
write direct to the screen-memory

I hope i'm not to late 

good luck
Kaljj