Winapi - Bits Per Pixel

Try this:

	DEVMODE dmSettings;					
	memset(&dmSettings,0,sizeof(dmSettings));

	if(!EnumDisplaySettings(NULL,ENUM_CURRENT_SETTINGS,&dmSettings))
	{
		MessageBox(NULL, "Could Not Enumerate Display Settings", "Error", MB_OK);
		return;
	}

After calling EnumDisplaySettings, dmSettings will contain information on the current display, including bit depth in dmSettings.dmBitsPerPel.


[edited by - CodeMunkie on April 23, 2004 2:00:00 PM]

Is GetDeviceCaps() what you''re looking for?

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Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

-Bertrand Russell, Unpopular Essays, "Ideas That Have Harmed Mankind"

I tried GetDeviceCaps(GetDc(GetDesktopWindow), BITSPIXEL), but that was to no avail.

bob_konysh

Well, I had forgotten about EnumDisplaySettings(), so that may work just fine (CodeMunkie posted while I was typing). As for GetDeviceCaps(), try using GetDC(NULL). From MSDN Docs for GetDC():

quote:

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hWnd
Handle to the window whose device context is to be retrieved. If this value is NULL, GetDC retrieves the device context for the entire screen.

---

---

Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

-Bertrand Russell, Unpopular Essays, "Ideas That Have Harmed Mankind"

Sorry for getting into, but I''m also searching for this, but I need even more precision than just the bpp.

How could I know the currently used bit masks for red, green and blue???

I tried testing speeds of BitBlt and it is at its best only when I match exactly my window''s masks (of course). But I don''t know how to detect it using only Win32 API...

With you advice I tried:

GetDeviceCaps(GetDC(NULL), BITSPIXEL);

That worked and sucessfuly returned the BPP.

bob_konysh