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Main => Main Forum => Topic started by: AE35 on June 27, 2007, 01:29:14 pm

Title: Mame 'bitmap prescaling' - what is that?
Post by: AE35 on June 27, 2007, 01:29:14 pm

Hi all!

I just tried the new Mame32 v116, and it has an option that says 'bitmap prescaling' with
a 1-10 slider.

What does that do? Right now I'm at work :) and running Mame in a window, but when I turn
it to 10, it just seem more blocky and sloooow.

Any advice? :)

Thanks,

Nicholas

Title: Re: Mame 'bitmap prescaling' - what is that?
Post by: Bursk on June 27, 2007, 01:52:31 pm

The higher the number the sharper/more blocky the graphics will be.  I use a setting of 2, because I find that's the best blurry/blocky combination.  I suggest you play around with the different settings to see what you like.  I do believe the higher the value the slower things will run.

Title: Re: Mame 'bitmap prescaling' - what is that?
Post by: RandyT on June 27, 2007, 01:52:58 pm

From what I understand, each pixel gets "squared" by the value of the slider before being handed to D3D for processing.  A 2 will represent each original pixel as 2x2 or 4 pixels, 9 for 3, 16 for 4, 25 for 5, etc.  This should reduce the amount of fuzziness caused by the filters, as well as being helpful in other circumstances (like matching game output screens to fixed resolution displays, such as LCD panels.)

RandyT

Title: Re: Mame 'bitmap prescaling' - what is that?
Post by: AE35 on June 27, 2007, 03:26:18 pm

Thanks....then it's not an option for me :)