Screen resolution
From Chocolate Doom
Chocolate Doom now has new screen resolution code, which can provide more modes (800x600 for example), and preserves the originally intended 4:3 screen resolution of Doom on other aspect ratios. It does this by letter- or pillar-boxing the screen (sometimes both to result in what is known as windowboxing) and rendering a 4:3 image inside it. To use this, you must have a recent SVN copy of Chocolate Doom (r1006 or higher). To set a specific mode, run Chocolate Doom with the following command line:
chocolate-doom -width 1280 -height 800
Note that -width and -height can be set to any value up to 1600 for width and 1200 for height - Chocolate Doom will automatically pick the closest supported value. Currently, Chocolate Doom's setup utility can not be used to change the resolution. In addition to using the command line arguments, the resolution can also be changed by editing the width and height values in Chocolate Doom's configuration file (chocolate-doom.cfg).
To prevent Chocolate Doom from changing to the nearest screen filling resolution automatically, change autoadjust_video_settings in Chocolate Doom's configuration file to 0.
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Supported scale sizes
Uncorrected aspect ratio
These modes are used when the "aspect ratio correction" option is turned off. Scaleup is performed by exact pixel doubling, which is fast and accurate; however, in modern square pixel video modes, the game may appear "squashed".
| Scale size | Full-screen resolutions this provides support for |
|---|---|
| 320x200 | 320x200, 320x240 (letterboxed) |
| 640x400 | 640x400, 640x480 (letterboxed) |
| 960x600 | 1024x768 (letterboxed) |
| 1280x800 | 1280x800 (widescreen), 1280x1024 (letterboxed) |
| 1600x1000 | 1600x1200 (letterboxed), 1080p |
Aspect ratio corrected
These modes are used when the "aspect ratio correction" option is turned on. Scaleup is performed by scaling the screen up and performing vertical stretching of the screen; the game then appears correct when viewed in a square pixel video mode. The disadvantages are that this may be slightly slower than the non-aspect ratio-corrected modes, and there may be slight blurring of the screen caused by antialiasing when performing the scaleup.
| Scale size | Full-screen resolutions this provides support for |
|---|---|
| 256x200 | |
| 320x240 | 320x240 (letterboxed) |
| 512x400 | |
| 640x480 | 640x480, 480p |
| 800x600 | 800x600 |
| 960x720 | 1024x768 (letterboxed), 720p |
| 1024x800 | 1280x800 (widescreen, pillarboxed) |
| 1280x960 | 1280x1024, 1080p (letterboxed) |
| 1280x1000 | 1280x1024, 1080p (letterboxed) |
| 1600x1200 | 1600x1200 |
External links
Aspect ratio on Doom Wiki (http://doom.wikia.com/).
