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Make a very preliminary attempt at 1.0.2, 1.2.0, and 1.4.0 roadmaps.
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Carl Worth
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2005-09-02 Carl Worth <cworth@cworth.org>
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* ROADMAP: Make a very preliminary attempt at 1.0.2, 1.2.0, and
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1.4.0 roadmaps.
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2005-09-02 Carl Worth <cworth@cworth.org>
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* doc/public/tmpl/cairo-version.sgml: Add description of cairo's
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155
ROADMAP
155
ROADMAP
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cairo 1.0 release requirements
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==============================
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Implementation work
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-------------------
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✓I1. Fix clipping to be sane
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Status: Done (in cairo 0.9.0).
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cairo 1.0.2 required fixes (Schedule unknown)
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=============================================
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[Need to look through bugzilla, particularly at new bugs filed since
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the 1.0.0 release]
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✓I2. Real PostScript/PDF fallbacks (cairo_meta_surface_t)
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Status: Done (to some extent) (in cairo 0.5.2)
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cairo 1.2.0 desired features (Scheduled for 2005-11-01)
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=======================================================
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A. PS backend
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----------
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1. Mark PS backend as supported:
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We do have PDF output now, and "real" PostScript
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output on a per-page basis when the capabilities of
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the PostScript imaging model aren't exceeded. There
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are a few parts of these backend that aren't complete,
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but that will have to wait for post-1.0 I'm afraid.
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a. Incorporate into test suite
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✓I3. Add support for sub-pixel (ARGB) rendering of text.
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Status: Done (in cairo 0.6.0).
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b. Correct output for the entire test suite
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✓I4. Fix the cache lock deadlocking problems.
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Status: Done (in cairo 0.9.2)
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2. Image fallbacks at finer-than-whole-page granularity
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✓I6. Fix all expected failures (XFAIL) in the test suite. Either
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there's a bug that needs to be fixed, or there are illegitimate
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tests that should be removed.
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Status: Done. 5 XFAIL test remain, but 4 of those have results
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that are acceptable. The only with with completely broken
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output (a8-mask) only happens with A8 image surface masks with
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weird padding, (so it is easy to avoid).
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B. PDF backend
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-----------
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1. Mark PDF backend as supported
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API additions (more detail in TODO file)
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----------------------------------------
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✓A7. cairo_surface_mark_dirty and cairo_surface_flush
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Status: Done (in cairo 0.9.0).
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a. Incorporate into test suite
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✓A12. cairo_xlib_surface_set_drawable
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Status: Done (in cairo 0.6.0).
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b. Correct output for the entire test suite (use image
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fallbacks as necessary, meta-surface?):
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Performance work
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----------------
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✓ Lots of performance work was done, such as the MMX-ification of
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pixman, the addition of cairo-benchmarks, and several 2x improvements
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for tests within cairo-benchamarks. Many thanks to Billy Biggs!
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a. Gradients with more than two stops
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Things that have been dropped from the 1.0 roadmap
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==================================================
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A3. Add cairo_begin/end/get_group
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Difficulty: easy to hard (depending on how sophisticated an
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implementation is acceptable, and whether the
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cairo_meta_surface_t mentioned in [I2] is done)
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b. All of the cairo_operator_t modes
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c. Gradients with transparency
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d. Repeating surface patterns
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e. cairo_mask
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C. Win32 backend
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-------------
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1. Incorporate into test suite
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2. Correct output for the entire suite
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D. Bug fixes
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---------
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1. Fix dashed splines.
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2. Fix some expected failures (XFAIL) in the test suite
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a. a8-mask
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b. clip-all
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c. filter-nearest-offset
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d. pixman-rotate
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E. API Additions
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-------------
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1. cairo_begin/end/get_group
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Status: cworth has a posted a preliminary patch, and keithp,
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krh, and otaylor answered all the tough questions it
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raised. There's not much work left to finish this one.
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I5. Finish the workaround for Render's overlapping source/dest bug
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(Copy the source as needed)
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F. Performance improvements
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------------------------
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1. Cull and trim trapezoids outside clip region bounds
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The most important part of this was to workaround when doing a
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straight copy, (eg. for scrolling), and that much is done. The
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remaining case is things like overlapping OVER of a surface
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with itself, which doesn't seem useful enough to be a priority
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at this point.
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2. Generate more large pixel-aligned, rectangular trapezoids
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I7. Fine-grained PostScript fallbacks (cairo_meta_surface_t)
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Difficulty: Moderate to hard
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Status: cairo_meta_surface provides most of the
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mechanics. From here on out its mostly a matter of
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refining the fallbacks to work on a finer-grained
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basis than the current all-or-nothing-per-page
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approach.
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✓3. Speed up glyph measurement (cache rewrite)
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I8. Finish implementing the PDF/PostScript backends:
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Difficulty: Moderate to hard
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Status: Most everything is there, but there are few things in
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cairo that these backends don't yet implement:
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G. SVG backend
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-----------
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1. Add experimental SVG backend
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* Gradients with more than two stops
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cairo 1.4.0 desired features (Schedule unknown)
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===============================================
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A. Quartz backend (maintainer needed!)
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-----------------------------------
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1. Mark Quartz backend as supported:
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* All of the cairo_operator_t modes
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a. Incorporate into test suite
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* Gradient with transparency
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b. Correct output for the entire suite
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* Repeating surface patterns
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B. SVG backend
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-----------
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1. Mark SVG backend as supported
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* cairo_mask
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a. Incorporate into test suite
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Some of these could be handled by fallbacks, either as
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a stop-gap measuer, or permanently. But that will also
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depend on finishing up [I7].
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b. Correct output for the entire suite
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P2. Generate better trapezoids to go easier on the rasterizer
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Difficulty: moderate to hard
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Status: cworth drafted a plan to the list. vektor is looking
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at this, (or other similarly useful performance
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optimizations)
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B. Performance improvements
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------------------------
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1. New tessellator (more robust and faster)
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P3. Glyph measurement needs to be sped up.
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Status: keithp and cworth planned this all out. keithp is
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working on this.
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C. Bug fixes
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---------
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1. Fix all expected failures (XFAIL) in the test suite
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a. self-intersecting
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AKA. https://bugs.freedesktop.org/show_bug.cgi?id=3752
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Fix depends on [A1].
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