How to save a scene in higher resolution?

hlee · 2013-09-18T22:38:26

I am trying to make posters for secens from my program. I can grab the screen by using IDirect3DDevice9:: GetBackBuffer. However it is limited to the screen resolutions of my display, 2560x1600. The new 4K displays can go up to 3840x2160, but even that is not good enough for large posters. I would like to have images of 6000x4000 or higher. Is this possible? Do I need to use a software device to render in a higher resolution than the display? If so, how?

Graphics and GPU Programming Programming

Started by hlee September 06, 2013 07:41 PM

20 comments, last by hlee 10 years, 7 months ago

hlee

115

Author

September 18, 2013 09:59 PM

How about using D3DXSaveSurfaceToFile

That works! I thought D3DXSaveSurfaceToFile requires the source being OffscreenPlainSurface.

That's one step saved. I still think it is unnecessarily cumbersome. Maybe D3D11 provide a more efficient method?

hlee

115

Author

September 18, 2013 10:38 PM

How about using D3DXSaveSurfaceToFile

That works! I thought D3DXSaveSurfaceToFile requires the source being OffscreenPlainSurface.

That's one step saved. I still think it is unnecessarily cumbersome. Maybe D3D11 provide a more efficient method?

Just noticed a side effect of skipping the step: the maximum resolution is reduced !

Somehow, by copying RT2 to an OffscreenPlainSurface before D3DXSaveSurfaceToFile, I can save a frame with higher resolution. Does anyone have an explanation?

Since efficiency is not a concern for my purpose, I will add the step back.

How to save a scene in higher resolution?

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How to save a scene in higher resolution?

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