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Old 09 December 2012, 02:12   #1
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Column Doubling with "no filter"?

I just noticed recently that WinUAE runs quite a bit faster when using "low-res" instead of "Hi-Res (Standard)" display mode, which is still OK for many games.

In fact, I can even run the Amiga 500 full speed on a ~700 MHz age old laptop of mine in this mode, which is very cool.

However, the picture is distorted in this case, unless I enable filters and use scale horizontal *2. Well, on my old laptop, using filters makes WinUAE extremely slow. I attribute this to some crappy intel onboard gfx chip.

Now, WinUAE already includes a line doubling option that works very well, without any filters enabled. Is it possible to include a "column doubling" mode similar to "line doubling" just to get rid of the screen distortion in "low res/no filter" mode. This could have almost zero computational overhead, couldn't it?

EDIT: Please move to wishlist topic... thanks

Last edited by rsn8887; 09 December 2012 at 02:31. Reason: EDIT: Please move to wishlist... thanks
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Old 09 December 2012, 09:21   #2
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The picture is not distorted, it is like you asked it to be. In "Hires (normal)" mode and using a lores Amiga screen mode, every pixel is doubled (as you want it to be). If you select "Low-res", this doubling does not take place.

If you want to use "Low-Res" you also need to select a low resolution on the top of the page. In combination with Line Mode "normal" you get a good low resolution display.
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Old 09 December 2012, 20:56   #3
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Originally Posted by rsn8887 View Post
EDIT: Please move to wishlist topic... thanks
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Old 10 December 2012, 08:25   #4
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Thomas already answered it perfectly.

Lores/hires equals horizontal no-doubling/doubling. Neither just doubles resolution, doubling also includes full interlace support just like hires adds hires resolution support.
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Old 10 December 2012, 20:01   #5
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Ah I get it now. Thanks for the help! Of course I did not think of turning off line-doubling when switching to low-res. After doing that and using a smaller fullscreen resolution it works nice on my old laptop now!
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