Dr. Halo CUT

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|formattype=electronic
 
|formattype=electronic
 
|subcat=Graphics
 
|subcat=Graphics
|extensions={{ext|cut}}<br>{{ext|pal}}
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|extensions={{ext|cut}}, {{ext|pal}}, {{ext|pic}}
|pronom={{PRONOM|x-fmt/316}}
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|pronom={{PRONOM|x-fmt/316}}, {{PRONOM|fmt/1186}}
 
}}
 
}}
== Overview ==
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'''Dr. Halo''' was a line of raster image editing software for MS-DOS. It has a well-known device-independent '''.CUT''' image format, which uses [[Run-length encoding|RLE compression]] (in a way which is similar to, but not the same as, [[PackBits]]). CUT files are sometimes accompanied by '''.PAL''' palette files. (This format is unrelated to the [[CUT (Amstrad)|Amstrad .cut]] file format.)
'''Dr. Halo''' is a raster image file format associated with the ''Dr. Halo III'' paint program for MS-DOS. It uses [[Run-length encoding|RLE]] compression.
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A Dr. Halo image is usually composed of two separate files: a ".CUT" file containing the bitmap, and a ".PAL" file containing the color palette.
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There is also a device-dependent '''.PIC''' image format. We have not located any details about PIC format.
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== Format details ==
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All CUT images have exactly 8 bits per pixel, but all 8 bits might not be used. It is common for the only color codes used by an image to be 0 and 1.
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It is not clear what to do if no palette file is present. Interpreting the image as grayscale, with black=0, seems to be standard practice. But different viewers use different logic for guessing the code that should be interpreted as white.
  
 
== Software ==
 
== Software ==
* [http://www.imagemagick.org/ ImageMagick] (format named "CUT")
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* [[ImageMagick]] (format named "CUT"; read only)
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* [[Konvertor]] (read only)
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* [[XnView]] (read only)
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* [[Farbfeld Utilities]] (read/write)
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* [[Tom's Editor]]
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* [[Tom's Viewer]]
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* Dr. Halo (read/write)
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** [https://archive.org/details/Dr.HaloIII3.0KyeOEM Dr. Halo III] - Floppy disk images from archive.org
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** [https://archive.org/details/Dr.HaloPlus3.00QTronixOEMGerman Dr. Halo Plus 3.00 (German)] - Floppy disk images from archive.org
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** Possibly relevant: [http://cd.textfiles.com/rbbsv3n1/dull/drhalo.unp drhalo.unp]
  
== Resources ==
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== Sample files ==
* [http://www.fileformat.info/format/drhalo/egff.htm Dr. Halo File Format Summary]
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* http://cd.textfiles.com/fantaziasampler/CLIPART/CUT/
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* http://cd.textfiles.com/gameempire/SOFT/NEW/PRO7/
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* http://cd.textfiles.com/librisbritannia/GRAPHICS/CLIPDRHA/ ...
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** [http://cd.textfiles.com/librisbritannia/GRAPHICS/CLIPDRHA/1169.ZIP 1169.ZIP] - PIC format
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* https://telparia.com/fileFormatSamples/image/drHalo/
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* https://web.archive.org/web/20191231015527/http://whatis.rest7.com/how-to-open-cut-file
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== Links ==
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* {{EGFF|drhalo|Dr. Halo File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]
 
* [http://www.textfiles.com/programming/FORMATS/pix_fmt.txt Picture format docs (of a number of formats including this one)]
 
* [http://www.textfiles.com/programming/FORMATS/pix_fmt.txt Picture format docs (of a number of formats including this one)]
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[[Category:Multi-file formats]]

Revision as of 13:57, 20 December 2020

File Format
Name Dr. Halo CUT
Ontology
Extension(s) .cut, .pal, .pic
PRONOM x-fmt/316, fmt/1186

Dr. Halo was a line of raster image editing software for MS-DOS. It has a well-known device-independent .CUT image format, which uses RLE compression (in a way which is similar to, but not the same as, PackBits). CUT files are sometimes accompanied by .PAL palette files. (This format is unrelated to the Amstrad .cut file format.)

There is also a device-dependent .PIC image format. We have not located any details about PIC format.

Contents

Format details

All CUT images have exactly 8 bits per pixel, but all 8 bits might not be used. It is common for the only color codes used by an image to be 0 and 1.

It is not clear what to do if no palette file is present. Interpreting the image as grayscale, with black=0, seems to be standard practice. But different viewers use different logic for guessing the code that should be interpreted as white.

Software

Sample files

Links

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