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cairo 0.5.2
===========
✓ Get tor to sign off that the win32 stuff is up to snuff
✓ glyph path patch reviewed and committed
✓ Fix the BadMatch error introduced between 0.5.0 and 0.5.1:
https://bugs.freedesktop.org/show_bug.cgi?id=3604
(It turns out this was just exposing an old bug in libpixman
0.1.4 which is already fixed in libpixman 0.1.5)
Add a workaround for Render's overlapping source/dest bug
✓ Use XCopyArea when possible (integer translation)
Otherwise make a copy of the source
Fix the cache lock deadlocking problems.
Difficulty: Hard
Status: The cache code was ugly enough that I ended up doing a
major rewrite rather than just reviewing the
locking. The upside is that the rewrite should also
add the missing metrics caches which will fix some
performance problems with text measurement. Almost
done now.
cairo 1.0 release requirements
==============================
Implementation work
-------------------
I1. Fix clipping to be sane
Dificulty: moderate
Status: cworth has started looking at this
I2. Real PostScript/PDF fallbacks (cairo_meta_surface_t)
Difficulty: hard
Status: krh has committed cairo_meta_surface_t and a preliminary
version of cairo_ps_surface_t that uses it.
I3. Add support for sub-pixel (ARGB) rendering of text.
Status: keithp walked cworth through this. Patch sent to the
list is almost complete.
API Issues (more detail in TODO file)
-------------------------------------
✓A1. Add cairo_paint
Difficulty: moderate or moderate to minor
Dependencies: much easier after [I1]. needs some cleanups from [A4]
Status: Done
✓A2. Add cairo_mask
Difficulty: moderate
Status: Done
A3. Add cairo_begin/end/get_group
Difficulty: easy to hard (depending on how sophisticated an
implementation is acceptable, and whether the
cairo_meta_surface_t mentioned in [I2] is done)
Status: cworth has a posted a preliminary patch, and keithp,
krh, and otaylor answered all the tough questions it
raised. There's not much work left to finish this one.
✓A4. Make set_source consistent
Difficulty: easy
Dependencies: needs [A2,A3] to avoid losing functionality,
(but we may just live with that as we've now got
a circular dependency)
Status: Done.
✓A5. Add cairo_clip/fill/stroke_preserve
Difficulty: easy
Status: Done.
✓A6. Just eliminate a bunch of functions:
✓ cairo_set_target_*
✓ cairo_copy
✓ cairo_surface_set_repeat/matrix/filter
✓ cairo_show_surface
Difficulty: trivial
Dependencies: eliminating cairo_show_surface depends on [A1]
Status: Done.
A7. cairo_surface_mark_dirty
Difficulty: trivial to add API, moderate to actually optimize
based on it
Status: cworth has sent API proposal to list
✓A8. cairo_content_t:
Difficulty: moderate. It's just going through and examining
each use of cairo_format_t, but there are a lot
of them.
Status: Done.
A9. consistent error handling for all objects
Difficulty: Easy to implement to get the API right. Hard to test.
Status: Done for cairo_t, cairo_path_t, and cairo_pattern_t.
Still need to do cairo_font_face_t,
cairo_scaled_font_t, and cairo_surface_t.
A10. cairo_font_options_t
Difficulty: Moderate
Status: Owen has done all the hard thinking, and we've got
consensus on the API now. Owen's working on a patch.
A11. cairo_xlib_surface_create needs to be screen-aware
Difficulty: Easy
Status: Keith has cooked up a patch with an APi that should be
sufficient. It still needs testing on multi-screen X
server.
A12. cairo_xlib_surface_set_drawable
Difficulty: Easy
Status: Keith has a patch sitting ready on the list.
Performance work
----------------
✓P1. Make pixel-aligned rectangle compositing fast
Difficulty: moderate to easy
Status: Done.
P2. Generate better trapezoids to go easier on the rasterizer
Difficulty: moderate to hard
Status: cworth drafted a plan to the list
P3. Glyph measurement needs to be sped up.
Status: Now planned as part of "cache lock deadlock" above.
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