DirectDraw Rendering Issues in Windows 8 in Legacy Code

Asked May 11 '14 at 20:08

Active May 11 '14 at 20:08

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I know almost nothing about DirectDraw and/or DirectX, but I've been helping port an old Windows 9x game to Windows 8. The game uses DirectDraw for rendering and on Windows 8 the GUI of the game has major artifacts.

Here is what the GUI should look like: Windows 7 running Underlight

And here is the same build, running on Windows 8.1: Windows 8.1 runing Underlight

I realize this isn't much to go on but I don't know what additional information I can provide that will help answer this question. I have access to the code, I can show you how we're loading bitmaps, initializing DirectDraw, whatever. But I don't know what bits are interesting.

Note this is an OLD Win32 API app; no MFC, no WPF, nothing but a plain old message pump.

Happy to provide any more information I can.g

asked May 11 '14 at 20:08

FreeMemory

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Does the code implement proper error checking? Have you looked to see if any DX calls are failing? – Jonathan Potter May 12 '14 at 06:47
I believe it does; if any of the DDraw setup calls fail, the game will immediately exit. – FreeMemory May 12 '14 at 12:47
What about the rendering calls? – Jonathan Potter May 12 '14 at 13:46
No, but I think I may have found the issue. Windows 8 expects all bitmaps to be 32 bit, but ours are not. I expect it's making them all full alpha OR it's just misaligning the bits somehow. – FreeMemory May 13 '14 at 11:56

DirectDraw Rendering Issues in Windows 8 in Legacy Code

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