Draw a semi-transparent icon in winapi.

diskdisk · 07-10-2009, 02:35 PM

People.
How can I draw a semi transparent icon in winapi with WM_PAINT ?
I mean i'm using functions like

Code:

HICON hIconPic =  LoadImage(_hInstance, MAKEINTRESOURCE(IDI_ICON), IMAGE_ICON, 320, 240, LR_LOADTRANSPARENT);
HDC dcIconPic = CreateCompatibleDC(0);
HICON hSecondIcon = (HICON)SelectObject(dcIconPic, hIconPic);
DrawIconEx(ps.hdc, 0, 0, hIconPic, 0, 0, 0, NULL, DI_NORMAL );

to draw an Icon in winapi window, but the transparency of the icon image is only fully transparent.
Semi-transparency doesn't work ! The semi transparency shown as white color. Can it be implemented somehow easily?

Yarin · 07-10-2009, 08:13 PM

I don't think so. The icon alpha channel isn't natively supported in XP and below. You'll have to make your own function for that, or install a library or graphics engine of some kind.

Alex31 · 07-13-2009, 03:19 AM

Quote:

Originally Posted by Yarin

I don't think so. The icon alpha channel isn't natively supported in XP and below. You'll have to make your own function for that, or install a library or graphics engine of some kind.

No, use Win32 Shell apis

diskdisk · 07-14-2009, 06:33 PM

Quote:

Originally Posted by Alex31

No, use Win32 Shell apis

can you please explain ?
wich of the API can do this ?

thanks

Alex31 · 07-18-2009, 12:08 PM

Several methods (see on Win32 grp, Sh. , C. Controls, etc)

07-10-2009, 02:35 PM	#1
diskdisk Registered User Join Date: Jun 2009 Posts: 9	Draw a semi-transparent icon in winapi. People. How can I draw a semi transparent icon in winapi with WM_PAINT ? I mean i'm using functions like Code: HICON hIconPic = LoadImage(_hInstance, MAKEINTRESOURCE(IDI_ICON), IMAGE_ICON, 320, 240, LR_LOADTRANSPARENT); HDC dcIconPic = CreateCompatibleDC(0); HICON hSecondIcon = (HICON)SelectObject(dcIconPic, hIconPic); DrawIconEx(ps.hdc, 0, 0, hIconPic, 0, 0, 0, NULL, DI_NORMAL ); to draw an Icon in winapi window, but the transparency of the icon image is only fully transparent. Semi-transparency doesn't work ! The semi transparency shown as white color. Can it be implemented somehow easily?
diskdisk is offline

07-10-2009, 08:13 PM	#2
Yarin Unregistered User Join Date: Jul 2007 Posts: 925	I don't think so. The icon alpha channel isn't natively supported in XP and below. You'll have to make your own function for that, or install a library or graphics engine of some kind. __________________ GCC 4.4.0, Code::Blocks 8.02, Fedora 11, x64
Yarin is offline

07-18-2009, 12:08 PM	#5
Alex31 Registered User Join Date: Apr 2007 Posts: 127	Several methods (see on Win32 grp, Sh. , C. Controls, etc)
Alex31 is offline

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