Calamus Raster Graphic file format - Revision history

>Lp: updated info

2017-01-31T01:57:54Z

updated info

← Older revision		Revision as of 21:57, 30 January 2017
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	8 pixels per byte, most significant bit first, white is 0. Rows are padded to the next		8 pixels per byte, most significant bit first, white is 0. Rows are padded to the next
	byte boundary.		byte boundary.

			Additional information:
			After the compressed data is 2 extra bytes. The purpose of these extra bytes is
			unknown. They can be safely ignored. Values encountered:
			$FFFF
			$0D0A (EC-Paint always writes this value)
	</pre>		</pre>
	Back to [[ST Picture Formats]]		Back to [[ST Picture Formats]]

>Lp: typo

2017-01-30T06:26:55Z

typo

← Older revision		Revision as of 02:26, 30 January 2017
Line 24:		Line 24:
	To decompress: Code byte (N) Instructions		To decompress: Code byte (N) Instructions
	N <= 127 Emit the next N+1 bytes literally.		N <= 127 Emit the next N+1 bytes literally.
	N >= 128 Emit the next byte N?127 times.		N >= 128 Emit the next byte N-127 times.

	After decompression, pixels are in left-to-right, top-to-bottom order. The format is		After decompression, pixels are in left-to-right, top-to-bottom order. The format is

>Lp: moved Calamus Raster Graphic file fomat to Calamus Raster Graphic file format: Spelling error

2017-01-02T22:45:40Z

moved Calamus Raster Graphic file fomat to Calamus Raster Graphic file format: Spelling error

← Older revision	Revision as of 18:45, 2 January 2017
(No difference)

>Lp: moved Calamus Raster Graphic to Calamus Raster Graphic file fomat: For consistency

2017-01-02T22:44:58Z

moved Calamus Raster Graphic to Calamus Raster Graphic file fomat: For consistency

← Older revision	Revision as of 18:44, 2 January 2017
(No difference)

>Lp: Rerormatted

2017-01-02T20:26:14Z

Rerormatted

← Older revision		Revision as of 16:26, 2 January 2017
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			<pre>
	Calamus Raster Graphic *.CRG		Calamus Raster Graphic *.CRG

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	8 pixels per byte, most significant bit first, white is 0. Rows are padded to the next		8 pixels per byte, most significant bit first, white is 0. Rows are padded to the next
	byte boundary.		byte boundary.
			</pre>
			Back to [[ST Picture Formats]]

>Lp: New page

2017-01-02T20:23:18Z

New page

New page

Calamus Raster Graphic *.CRG

10 bytes file id [”CALAMUSCRG”]
1 word version? [$03E8]
1 word version? [$0002]
1 long file size, minus 24
1 word code for the page size? [$0080]
1 long image width in pixels
1 long image height in pixels
1 long unknown [varies]
1 byte unknown [$01]
1 byte unknown [$00]
1 long unknown [$FFFFFFFF]
1 long size of compressed image data in bytes
--------
42 bytes total for header

?? monochrome image adata

RLE compression scheme: The compressed data consists of a code byte, followed by one or
more data bytes, followed by another code byte, and so on.

To decompress: Code byte (N) Instructions
N <= 127 Emit the next N+1 bytes literally.
N >= 128 Emit the next byte N?127 times.

After decompression, pixels are in left-to-right, top-to-bottom order. The format is
8 pixels per byte, most significant bit first, white is 0. Rows are padded to the next
byte boundary.