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Win32 Double Buffering

Jamin Grey · 2006-08-28T12:04:11

I'm almost finished with the 2D level editor I'm working on, whihc I've built in win32, but I've hit a snag. The screen flickers so much when I continueally update the screen, I can barely see what's going on. I looked up some double buffering tuts and checked some old threads posted here on gamedev, but I can't seem to get it working correctly. I essentionally am drawing like this: //Not all the drawing code, but the rest is reduntant HBITMAP hbmOld; HBITMAP Bitmap; hdc = BeginPaint(hwnd, &ps); HDC hdcMem = CreateCompatibleDC(hdc); hbmOld = (HBITMAP)SelectObject(hdcMem, Bitmap); BitBlt(hdc, X, Y, 32, 32, hdcMem, 0, 0, SRCCOPY); SelectObject(hdcMem, hbmOld); DeleteDC(hdcMem); EndPaint(hwnd, &ps); How can I double buffer it? My attempts leave me with a blank screen. [smile] I think I understand the concept, but I don't get exactly how it's done. Is my buffer supposed to be a HBITMAP or a HDC? How do I 'flip' the buffer to the front? I would much apreciate a code snippet or tutorial so I can see it in action, or a detailed enough explantion for one as thick as me to understand. =) Many thanks,

General and Gameplay Programming Programming

Started by Servant of the Lord August 26, 2006 07:03 PM

9 comments, last by Servant of the Lord 17 years, 7 months ago

Servant of the Lord

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August 28, 2006 12:04 PM

Hmm, I have another question, and think it doesn't warrant a new thread being made.

The drawing itself double buffers fine, but the dialog boxes I made into scroll bars and a toolbar still flicker at redraw. I tried several things like using a RNG to limit what I redraw, but I'm still having issues with it. Is there a way to double buffer dialog boxes through a simple command without using .NET frame?

If not, I'll have to manually draw the WM_PAINT of the dialog boxes and double buffer it myself. I'd use the basics of DefWindowProc, to not recreate the wheel, but I'm not sure what DefWindowProc looks like inside. I can't find it online or offline. (But apparenly it's a 'windows2' file) Anyone know how I can access it?

Win32 Double Buffering

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