DCX

Full Name	Paintbrush (Intel multi-page FAX format)
Format ID	IG_FORMAT_DCX = 8
File Extension(s)	*.dcx
Data Type	Raster image
Data Encoding	Binary
Color Profile Support	No
ImageGear Multipage Support	Yes
ImageGear Alpha Channel Support	No
ImageGear Platforms Support	WIN32, WIN64, Unix, Unix64, .NET, .NET64, MAC

ImageGear Supported Versions:

N/A

ImageGear Supported Features:

IG_FLTR_DETECTSUPPORT - autodetection
IG_FLTR_PAGEREADSUPPORT - single page file reading
IG_FLTR_MPAGEREADPSUPPORT - multi-page file reading
IG_FLTR_PAGEINSERTSUPPORT - single-page file writing
IG_FLTR_MPAGEWRITEPSUPPORT - multi-page file writing

ImageGear Read Support:

IG_COMPRESSION_NONE:
- Indexed RGB: 1, 4, 8 bpp;
- RGB: 24 bpp
IG_COMPRESSION_RLE:
- Indexed RGB: 1, 4, 8 bpp;
- RGB: 24 bpp

ImageGear Write Support:

IG_COMPRESSION_NONE:
- Indexed RGB: 1, 4, 8 bpp;
- RGB: 24 bpp
IG_COMPRESSION_RLE:
- Indexed RGB: 1, 4, 8 bpp;
- RGB: 24 bpp

ImageGear Filter Control Parameters:

Filter Control Parameter	Type	Default Value	Available Values	Description
SAVE_COMPRESSED	AT_BOOL	TRUE	FALSE, TRUE	This parameters specify either compress output image or not. TRUE value cause to RLE compress image. FALSE cause to write image uncompressed.
ADD_IMAGE	AT_BOOL	TRUE	FALSE, TRUE	If this parameter is TRUE then image is added as additional page of multi-page image. If FALSE then the new image with single page is written

Comments:

This file format was designed to allow multiple PCX files to be stored in one file. This is especially desirable for multi-page faxes (for which the PCX format is often used). Up to 1024 PCX images can be stored in one DCX file.

The DCX construct begins with a simple header, then the PCX files are simply stored end-to-end, complete with their individual headers and palettes. An array in the header called "Pagetable" contains offsets to each PCX. The one piece of vital information not stored with the PCX files under a DCX is their original filenames. See the PCX section of this manual for more about PCX files.

References Used

Murray, James D. and William vanRyper. Encyclopedia of Graphics File Formats. Sebastopol, CA: O'Reilly & Associates, Inc., 1994.