gdk_gl_font_use_pango_font(_for_display) uses deprecated Pango
interfaces. Rewriting it not to do so is not straightforward: it uses
these Pango functions to get something to hand off to glXUseXFont. As I
understand it, there's no direct replacement for these Pango functions:
they rely on older X11 font machinery that modern text rendering code
has moved away from; and glXUseXFont was intended to work with that same
machinery.
Given that fixing gdk_gl_font_use_pango_font is nontrivial, I'm not so
sure it *should* be fixed. I say that because I really don't think that
this function belongs in GtkGLExt. It is a convenience function that
doesn't rely on any (other) GtkGLExt internals. And it isn't likely to
be convenient for anything nontrivial. There's other stuff in the API
like this, too: gdkglshapes.h is a good example.
Now, ideally we'd have deprecated this stuff months/years ago. But we
didn't. So here are our options, as I see it:
1. Reimplement gdk_gl_font_use_pango_font to use modern
interfaces.
2. Deprecate it and rush out a release.
3. Simply kill it.
Now, I'm not doing #1. So unless someone else volunteers to do it, it's
not really an option.
I'm unsure of the value of #2. It could easily end up being a very
short deprecation period; and we might end up having to rush out a
release eliminating the functions (when the Pango bits in question
disappear out from under us).
And that brings us to option #3. This lets us take a little more time
with the next release--and we can talk about what other sorts of API
changes we'd like to make while we're in the spirit of breaking stuff.
--
Braden McDaniel <bra...@endoframe.com>
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