CHR Format (Halloween Harry)

CHR Format (Halloween Harry)

Format type	Tileset
Hardware	VGA
Max tile count	255
Palette	Shared VGA
Tile names?	No
Minimum tile size (pixels)	16×16
Maximum tile size (pixels)	16×16
Plane count	1
Plane arrangement	Linear VGA
Transparent pixels?	Yes
Hitmap pixels?	No
Metadata?	None
Supports sub-tilesets?	No
Compressed tiles?	No
Hidden data?	No
Games	Halloween Harry

The CHR Format is used by Halloween Harry to store map tiles. The .CHR files are stored inside the main HARRY.-0 group file.

MISSIONx.CHR (where x is a number from 1-4) are files containing the map graphics for Halloween Harry and Alien Carnage. They consist of a number of consecutive image chunks composed entirely of raw data. They are identical in format to the ICO files, with the exception that dimension data is omitted for images, since they are all 16x16 pixels.

The CHR file for each mission contains the image data used to draw the levels for that mission. Please see the article on the GMF Format for details.

There is no palette stored in the CHR file and the data is standard 8bpp indexed. Each file contains 255 images.

File format

The file has no signature or headers. Because there are always 255 images and they are fixed at 16×16 8bpp, files will always be 65280 bytes long.

Data type	Description
BYTE image00[256]	First 16×16 image
BYTE image01[256]	Second 16×16 image
...
BYTE imageFE[256]	255th 16×16 image

Tools

The following tools are able to work with files in this format.

Name	Platform	View images in this format?	Convert/export to another file/format?	Import from another file/format?	Access hidden data?	Edit metadata?	Notes
Camoto	Linux/Windows	Yes	Yes	Yes	N/A	N/A

Credits

This file format was reverse engineered by Duckthing. If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)