Difference between revisions of "User Manual/Appendix: Graphic filters"
(New page: == Graphic filters == ScummVM offers several anti-aliasing filters to attempt to improve visual quality. These filters take the original game graphics, and scale it by a certain fixed fac...) |
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! Factor | ! Factor | ||
! Description | ! Description | ||
! Snapshot | |||
|- | |- | ||
| | | Normal | ||
| 1x | | 1x | ||
| No filtering, no scaling, fastest | | No filtering, no scaling, fastest | ||
|[[Image:ManiacMansion_Normal.png|thumb|Maniac Mansion Normal]] | |||
|- | |- | ||
| | | 2X | ||
| 2x | | 2x | ||
| No filtering, simple pixel duplication (default for non 640x480 games) | | No filtering, simple pixel duplication (default for non 640x480 games) | ||
|[[Image:ManiacMansion_2X.png|thumb|Maniac Mansion 2X]] | |||
|- | |- | ||
| | | 3X | ||
| 3x | | 3x | ||
| No filtering, simple pixel duplication | | No filtering, simple pixel duplication | ||
|[[Image:ManiacMansion_3X.png|thumb|Maniac Mansion 3X]] | |||
|- | |- | ||
| | | 2xSAI | ||
| 2x | | 2x | ||
| SAI filter | | SAI filter | ||
|[[Image:ManiacMansion_2xSAI.png|thumb|Maniac Mansion 2xSAI]] | |||
|- | |- | ||
| | | Super2xSAI | ||
| 2x | | 2x | ||
| Enhanced 2xSAI filtering | | Enhanced 2xSAI filtering | ||
|[[Image:ManiacMansion_Super2xSAI.png|thumb|Maniac Mansion Super2xSAI]] | |||
|- | |- | ||
| | | SuperEagle | ||
| 2x | | 2x | ||
| Less blurry than 2xSAI, but slower | | Less blurry than 2xSAI, but slower | ||
|[[Image:ManiacMansion_SuperEagle.png|thumb|Maniac Mansion SuperEagle]] | |||
|- | |- | ||
| | | AdvMAME2x | ||
| 2x | | 2x | ||
| Doesn't rely on blurring like 2xSAI, fast | | Doesn't rely on blurring like 2xSAI, fast | ||
|[[Image:ManiacMansion_AdvMAME2x.png|thumb|Maniac Mansion AdvMAME2x]] | |||
|- | |- | ||
| | | AdvMAME3x | ||
| 3x | | 3x | ||
| Doesn't rely on blurring like 2xSAI, fast | | Doesn't rely on blurring like 2xSAI, fast | ||
|[[Image:ManiacMansion_AdvMAME3x.png|thumb|Maniac Mansion AdvMAME3x]] | |||
|- | |- | ||
| | | HQ2x | ||
| 2x | | 2x | ||
| Very nice high quality filter but slow | | Very nice high quality filter but slow | ||
|[[Image:ManiacMansion_HQ2x.png|thumb|Maniac Mansion HQ2x]] | |||
|- | |- | ||
| | | HQ3x | ||
| 3x | | 3x | ||
| Very nice high quality filter but slow | | Very nice high quality filter but slow | ||
|[[Image:ManiacMansion_HQ3x.png|thumb|Maniac Mansion HQ3x]] | |||
|- | |- | ||
| | | TV2x | ||
| 2x | | 2x | ||
| Interlace filter, tries to emulate a TV | | Interlace filter, tries to emulate a TV | ||
|[[Image:ManiacMansion_TV2x.png|thumb|Maniac Mansion TV2x]] | |||
|- | |- | ||
| | | DotMatrix | ||
| 2x | | 2x | ||
| Dot matrix effect | | Dot matrix effect | ||
|[[Image:ManiacMansion_DotMatrix.png|thumb|Maniac Mansion DotMatrix]] | |||
|} | |} | ||
Click on the images above to display them at their real size and see the effect of the graphic modes. | |||
To select a graphics filter from the command line, use the '-g' option (see [[User Manual/Appendix: Command line options|Command line options]]), e.g.: | To select a graphics filter from the command line, use the '-g' option (see [[User Manual/Appendix: Command line options|Command line options]]), e.g.: | ||
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''Note 2'': When setting a graphic filter in the general ScummVM options it only applies to the games that have a low original resolution (e.g. 320x200 or 320x240). To use a graphic filter with a game that has a higher original resolution (e.g. 640x480) you need to specifically set the graphic filter in the settings for that game. | ''Note 2'': When setting a graphic filter in the general ScummVM options it only applies to the games that have a low original resolution (e.g. 320x200 or 320x240). To use a graphic filter with a game that has a higher original resolution (e.g. 640x480) you need to specifically set the graphic filter in the settings for that game. | ||
== Comparison == | |||
{{ManualScreenshot|name=ManiacMansion_comparison2x.png|desc=Comparison of 2x graphic modes}} | |||
Comparison of the 2x graphic modes (2X, TV2x, AdvMAME2x, 2xSAI, Super2xSAI, SuperEagle, HQ2x and DotMatrix) | |||
{{-}} | |||
{{ManualScreenshot|name=ManiacMansion_comparison3x.png|desc=Comparison of 3x graphic modes}} | |||
Comparison of the 2x graphic modes (3X, AdvMAME3x, HQ3x) | |||
{{-}} | |||
Revision as of 19:51, 8 August 2009
Graphic filters
ScummVM offers several anti-aliasing filters to attempt to improve visual quality. These filters take the original game graphics, and scale it by a certain fixed factor (usually 2x or 3x) before displaying them to you. So for example, if the game originally ran at a resolution of 320x200 (typical for most of the SCUMM games), then using a filter with a scale factor of 2x will effectively yield 640x400 graphics. Likewise a 3x filter will give 960x600.
ScummVM uses the following graphic filters:
| Name | Factor | Description | Snapshot |
|---|---|---|---|
| Normal | 1x | No filtering, no scaling, fastest | |
| 2X | 2x | No filtering, simple pixel duplication (default for non 640x480 games) | |
| 3X | 3x | No filtering, simple pixel duplication | |
| 2xSAI | 2x | SAI filter | |
| Super2xSAI | 2x | Enhanced 2xSAI filtering | |
| SuperEagle | 2x | Less blurry than 2xSAI, but slower | |
| AdvMAME2x | 2x | Doesn't rely on blurring like 2xSAI, fast | |
| AdvMAME3x | 3x | Doesn't rely on blurring like 2xSAI, fast | |
| HQ2x | 2x | Very nice high quality filter but slow | |
| HQ3x | 3x | Very nice high quality filter but slow | |
| TV2x | 2x | Interlace filter, tries to emulate a TV | |
| DotMatrix | 2x | Dot matrix effect |
Click on the images above to display them at their real size and see the effect of the graphic modes.
To select a graphics filter from the command line, use the '-g' option (see Command line options), e.g.:
scummvm -gadvmame2x monkey2
There is always a speed impact when using any form of anti-aliasing/linear filtering. Filters can be especially slow when ScummVM is compiled in a debug configuration without optimizations. For these reasons, not all backends support all (or even any) of the filters listed above; some may support additional ones. The filters listed above are those supported by the default SDL backend.
Note 1: The final resolution depends on the original resolution of the game you are playing. For example, the FM-TOWNS version of Zak McKracken uses an original resolution of 320x240, hence for this game the final resolution with a scaler will be 640x480 (2x) or 960x720 (3x). Likewise, games that were originally 640x480 (such as Curse of Monkey Island or the Broken Sword games) will be scaled to 1280x960 (2x) and 1920x1440 (3x).
Note 2: When setting a graphic filter in the general ScummVM options it only applies to the games that have a low original resolution (e.g. 320x200 or 320x240). To use a graphic filter with a game that has a higher original resolution (e.g. 640x480) you need to specifically set the graphic filter in the settings for that game.
Comparison
Comparison of the 2x graphic modes (2X, TV2x, AdvMAME2x, 2xSAI, Super2xSAI, SuperEagle, HQ2x and DotMatrix)
Comparison of the 2x graphic modes (3X, AdvMAME3x, HQ3x)