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Shaping
=======
Layout Driver
=============
The PangoLayout object is a highlevel driver that takes an attributed
string and produces lines of glyphs.
* Figure out better ways of doing line breaks. (This may involve
implementing the TeX/Raph x0-x1 stuff for line breaks.)
* Add spacing parameter as illustrated; this should be a quick
(10 minute) addition.
* Although PangoLayout isn't intended to handle large amounts
of text, it should be able to handle embedded "\n" and simple
multiple paragraphs. This could be done entirely within
pango_layout_check_lines()
* Attribute handling needs to be added (fg/bg/underline, etc.)
Each PangoItem should have a list of associated non-font
attributes ... though this would require a bit more thought
as to memory-management of PangoItem, which is currently add-hoc.
X rendering
===========
* Right now we assume a single resolution for all fonts on a display;
but in theory, the resolution could be per-screen. To solve
this, we would probably want to add a window argument to
pango_x_get_context() and then have some sort of X specific font
loading interface.
Other rendering engines
======================
* Somebody should start working on a libart font-system / renderer
soon, to make sure that the interfaces are suitable.
* FreeType-2.0 support could be very interesting, with the OpenType
that it has.
Engines
=======
* Switch engines to be indentified by properties, instead
of hardcoded role/language. (?)
Language Modules
================
* It would be nice to have X based shapers for a few more scripts;
Hindi is one obvious need. (Actually, there may be a need for
a generic framework for Indic shapers to be developed. A
libpango-indic...)
* Once we have a libart renderer, porting Raph's devanagari shaper
to Pango and C (from Perl) would be a cool demo and test case.
* The clusters set by the current modules need to be set.
* Tamil module should be switched over to libunicode from utils.c stuff.
Documentation
=============
* Much or all of the X Fonts document from pango.org needs to be moved
into the API reference.
General
=======
* Move font sizes to 1000ths of a point where they are still doubles.
* Remove the extraneous font argument from the script_shape virtual function
in ShapeEngine.
* rename pango_context_set_size() to pango_context_set_font_size()
* PangoAttrList currently takes the policy of "most recent wins"
when multiple attributes of the same type are present for a range.
It would map better on the TkText tag-based API if attributes
also had a depth/priority and "most recent wins" only applied
for attributes of the same priority.
* Add a "make test" target to examples/, add environment variables
to point to module and font alias files, remove the code that
loads these from the current directory. (There are security
implications with the current stuff)
* pango_context_list_fonts() does not properly suppress duplicates
when multiple font maps are involved
* Report errors from functions, these errors include such things.
- Invalid string
- Font does not match
Probably the right thing to do here is to use something very close
to the GConf API ... see Havoc's GException proposal.
* Allow UTF8 strings with embedded NULLs.
* Write a small default shaping engine that only
draws a placeholder character ... and does that in
a way that always works.
* Finish coverting over from utils.c to Tom Tromey's libunicode.
Add the remaining useful functions from utils.c into libunicode.
* s/num_chars/n_chars/ etc. (Always use n_ as enumeration prefix)
* Underline attribute should be an enumeration (none/single/double/squiggle/low,
where low is below the ink rect - a style appropriate for underline
accelerators.)
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