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49 lines
2.1 KiB
TeX
49 lines
2.1 KiB
TeX
%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: "readme"
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%%% End:
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\subsection {Graphics filters} \label{sect-gfx-filters}
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ScummVM offers several anti-aliasing filters to attempt to improve visual
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quality. These are the same filters used in many other emulators, such as
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MAME. These filters take the original game graphics, and scale it by a
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certain fixed factor (usually 2x or 3x) before displaying them to you.
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So for example, if the game originally run at a resolution of 320x200
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(typical for most of the SCUMM games), then using a filter with scale
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factor 2x will effectively yield 640x400 graphics. Likewise with a
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3x filter you'll get 960x600.
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They are:\\
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\begin{tabular}[h]{ll}
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1x & No filtering, no scaling. Fastest.\\
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2x & No filtering, factor 2x (default for non 640x480 games).\\
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3x & No filtering, factor 3x.\\
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2xsai & 2xsai filter, factor 2x.\\
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super2xsai & Enhanced 2xsai filtering, factor 2x.\\
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supereagle & Less blurry than 2xsai, but slower. Factor 2x.\\
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advmame2x & Doesn't rely on blurring like 2xSAI, fast. Factor 2x.\\
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advmame3x & Doesn't rely on blurring like 2xSAI, fast. Factor 3x.\\
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hq2x & Very nice high quality filter but slow. Factor 2x.\\
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hq3x & Very nice high quality filter but slow. Factor 3x.\\
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tv2x & Interlace filter, tries to emulate a TV. Factor 2x.\\
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dotmatrix & Dot matrix effect. Factor 2x.\\
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\end{tabular}
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To select a graphics filter, pass its name via the '-g' option to scummvm,
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for example:
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\begin{verbatim}
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scummvm -g advmame2x monkey2
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\end{verbatim}
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\begin{enumerate}
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\item [Note \#1] Not all backends support all or any filters. The ones
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listed above are for the default SDL backend.
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\item [Note \#2] Filters can be very slow when ScummVM is compiled in a
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debug configuration without optimizations. And there is always a
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speed impact when using any form of anti-aliasing/linear filtering.
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\item [Note \#3] The FM-TOWNS version of Zak uses an
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original resolution of 320x240 -- hence for this game scalers will
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scale to 640x480 or 960x720.
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\end{enumerate}
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