D3D9: Resize in Windowed Application

Graphics and GPU Programming Programming

Started by schupf May 28, 2011 07:21 PM

6 comments, last by malborojones 12 years, 10 months ago

221

Author

May 28, 2011 07:21 PM

Hello,

I have a D3D9 windowed application. When I create the device I do not specify any dimensions for the backbuffer. For example:



   mPresentParams.BackBufferWidth  = 0;

   mPresentParams.BackBufferHeight = 0;

Now I wonder if I have to do anything when I resize the window? Do I have to reset() the device if the window is resized?

MJP

20,295

May 28, 2011 08:54 PM

Creating your device that way means that it will create a back buffer with the same size as your window's client area. If the window changes size, you don't *have* to change your backbuffer size but if you don't, what you're rendering will appear either squashed or stretched. So if you don't want that to happen, you should reset the device so that the backbuffer continues to match the window size.

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schupf

221

Author

May 28, 2011 09:29 PM

Hm ok. So after the window has been resized I just reset() the device with a new PresentParameters struct were BackBufferWidth and BackBufferHeight is again 0?

TomKQT

1,708

May 29, 2011 09:15 AM

Hm ok. So after the window has been resized I just reset() the device with a new PresentParameters struct were BackBufferWidth and BackBufferHeight is again 0?

Yes. Just don't forget that you cannot simply reuse the PresentParams structure you used to create the device, because it autimatically overwrites your 0 dimensions with the actual size. You have to set them back to zero.
Also, "just reset()" of course have to mean to do all what a device reset requires (freeing non-managed resources etc.).

schupf

221

Author

May 29, 2011 04:14 PM

Thanks for the hint with the resetting of width/height! I definitely would have missed that:)

malborojones

100

May 29, 2011 05:08 PM

Just don't make the same mistake I did and use D3DPOOL_DEFAULT for everything ;D Otherwise you'll have to release and recreate everything created using DEFAULT when you call device reset. USE MANAGED!

The only thing I have to do is call my font's OnResetDevice before and OnLostDevice after resetting the device.

Good luck, Mal ^_^

Never refuse a cup of tea, that's how wars are started.

TomKQT

1,708

May 29, 2011 05:36 PM

The only thing I have to do is call my font's OnResetDevice before and OnLostDevice after resetting the device.

And Effect's and Sprite's

malborojones

100

May 30, 2011 10:04 AM

[quote name='malborojones' timestamp='1306688931' post='4817163']The only thing I have to do is call my font's OnResetDevice before and OnLostDevice after resetting the device.

And Effect's and Sprite's

[/quote]

If you're using them x) Sprite's are okay I think as long as you use the managed pool for their textures. I don't have to reload any of the sprites when calling Reset ^_^

Never refuse a cup of tea, that's how wars are started.

D3D9: Resize in Windowed Application

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D3D9: Resize in Windowed Application

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