TIP #205: Use pkgconfig Database to Register Xft Support
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TIP:	205
Title:	Use pkgconfig Database to Register Xft Support
Version:	$Revision: 1.5 $
Authors:	Joe English <jenglish@users.sourceforge.net>
State:	Final
Type:	Project
Tcl-Version:	8.5
Vote:	Done
Created:	Wed Jun 23 00:00:00 UTC 2004
Abstract
This TIP proposes to use Tcl's package configuration database (see [59]) to register whether Tk was compiled with support for Xft.
Rationale
As of version 8.5, Tk has optional support for Xft (the modern replacement for server-side fonts in X11). However, at present application code has no way to determine whether or not Xft support was enabled when Tk was built. The package configuration database facility introduced in [59] seems like an ideal place to record this information.
Proposal
If Tk was configured with --enable-xft, the command
 tk::pkgconfig get fontsystem
shall return the value xft.
Notes
The change as currently proposed is the minimum necessary to satisfy the requirement listed in the Rationale. In particular: nothing else in Tk currently calls Tcl_RegisterConfig(), so if Xft support is not enabled the tk::pkgconfig command will remain undefined.
This TIP (or something like it) is a prerequisite for a script-level implementation of [145], which will need to distinguish whether or not Xft is in use.
Implementation
See Tk Patch #976520[http://sourceforge.net/support/tracker.php?aid=976520]
Copyright
This document has been placed in the public domain.
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