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Source filters alter the program text of a module before Perl sees it, much as a C preprocessor alters the source text of a C program before the compiler sees it.
Interface to Adobe Font Metrics files
Perl module for TrueType font hacking. Supports reading, processing and writing of the following tables: GDEF, GPOS, GSUB, LTSH, OS/2, PCLT, bsln, cmap, cvt, fdsc, feat, fpgm, glyf, hdmx, head, hhea, hmtx, kern, loca, maxp, mort, name, post, prep, prop, vhea, vmtx and the reading and writing of all other table types. In short, you can do almost anything with a standard TrueType font with this module.
Converts data to/from stringified form, appropriate for saving-to/reading-from permanent storage.
A Future object represents an operation that is currently in progress, or has recently completed. It can be used in a variety of ways to manage the flow of control, and data, through an asynchronous program.
This is a autoloadable interface module for GD, a popular library for creating and manipulating PNG files. With this library you can create PNG images on the fly or modify existing files.
Graph generation package for Perl.
This is the GD::Graph3d extensions module. It provides 3D graphs for the GD::Graph module by Martien Verbruggen, which in turn generates graph using Lincoln Stein's GD.pm.