port to c++
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staticify
save/restore textures in a safer way, also save/restore glyph cache
use an compressed format for glyph quad vectors. this reduces the size of e.g. the opengl info from 200k to 20k, and typical sizes for labels are now <<100 bytes. the cost is full immediate mode submission of coordinates (cpu), but glInterleavedArrays is likely not much faster and modern cpus probably prefer more decoding over more cache misses.
even more changes to texture management - screw those completely broken drivers, but cater for the leaking ones
There is of course no way to clear glyph caches in stupid pango, so we have to add a generation counter to each and every glyph structure and check it on every access.
Get rid of cairo completely (yay!) and of ft2 factually (still need the library as it included pangofc), by introducing a custom pango opengl renderer. Text rendering now no longer requires the distinction between rgba and grayscale modes, requires much less texture space and memory, and is faster on accelerated hardware (and possibly with software rendering, too). All at the cost of only 1200 lines or so.
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