WPG

Full Name	WPG (WordPerfect Graphics Metafile)
Format ID	ImGearFormats.WPG
File Extension(s)	*.wpg
Data Type	Raster Image
Data Encoding	Binary
Multi-Page Support	No
Alpha Channel Support	No
Metadata Update Support	No
ImageGear Platforms Support	WIN32, WIN64, Unix, Unix64, .NET, .NET64, MAC

ImageGear Supported Versions

WPG for WP 5.1 and up can store bitmap and vector graphics in the same file.
WPG for WP 5.0 and prior can store only bitmap or vector graphic, but not both in same file.

ImageGear Supported Features

IGFilterFormatFlags.DETECTSUPPORT - autodetection
IGFilterFormatFlags.PAGEREADSUPPORT - single page file reading

ImageGear Read Support

ImGearCompressions.RLE - Indexed RGB: 1, 4, 8 bpp

ImageGear Write Support

ImageGear Filter Control Parameters

None

Comments

Metafiles contain vector (or geometric) specifications and bitmap pixel data. Vector data is ignored; only the bitmap data is read and/or written.

This format was created specifically for use with WordPerfect software products. WPG files for WordPerfect versions 5.1 and up can store both bitmap and vector image data in the same file.

The WordPerfect Graphics Metafile contains a short header or "prefix" (as WordPerfect Corporation referred to it). The header is followed by a record area, that is a sequence of objects and their attributes. The first record is called the "Start WPG Data" record and contains information on the size of the images and the version number of the .WPG file. The next record is usually a color map, unless the image is black and white. The next record is a bitmap record. If there are multiple images, there is a bitmap record for each image. The last record in a .WPG file contains a NULL body to signify the end of the file. These files may also contain Encapsulated PostScript (EPS) data.

References Used

Murray, James D. "Graphic Image Format FAQ 3-4". James D. Murray, 1994-1996.

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