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241 Commits

Author SHA1 Message Date
Cosimo Lupo
0ad14b67a9 [varLib] fix TypeError: zip object has no len on python3 2017-07-27 17:05:34 +01:00
Behdad Esfahbod
bb6ce80f63 [varLib] Speed up IUP optimizer by detecting more forced points 2017-07-26 14:13:18 -07:00
Behdad Esfahbod
69206e290e [varLib] "Document" IUP DP algorithm for the case when forced set is empty 2017-07-22 18:48:23 -07:00
Behdad Esfahbod
e5ac044969 [varLib] Speed up IUP DP some more when forced set is empty 
Pass a maximum lookback of n to the circle-breaking DP of size 2*n.

This should theoretically speed up that DP by a factor of 4 or 8 or something...
Empirically it's far from that, but solidly measurable.

Again, gvar table size got a slight improvement, which I didn't expect... It
might be that my one test is hitting lucky cases with point encodings.. or it
might be just me wishfully thinking so.
 2017-07-22 18:46:16 -07:00
Behdad Esfahbod
91e4220193 [varLib] Speed up IUP DP when forced set is empty 
Drives it into acceptable speed now.  Note that I'm getting better
gvar size after this patch, which I didn't expect.  So, either this
algorithm or the previous one was buggy. :(
 2017-07-22 18:31:10 -07:00
Rob McKaughan
efabd5b049 Move assert outside of if at the bottom of _add_MVAR() per Behdad. 2017-06-22 15:15:58 -07:00
Rob McKaughan
ae451052b8 Changed 'if len(records) > 0' to 'if records' in _add_MVAR() 2017-06-20 15:30:28 -07:00
Rob McKaughan
7ed4c43395 Do not emit MVAR if there are no entries in the variation store 2017-06-20 15:01:23 -07:00
Behdad Esfahbod
7fa1ce1ca7 [varLib] Finish optimal IUP DP, however! 
This slows down the DP by factor of 8 or so!  So, going to replace this last
brute-force step with something else.
 2017-05-31 20:29:00 -04:00
Behdad Esfahbod
bd5fa12520 [varLib] A bit more refactoring towards optimal IUP 2017-05-31 20:12:59 -04:00
Behdad Esfahbod
05b1bed63b [varLib] Towards truly optimal IUP DP solution wrt circularity 2017-05-31 19:58:12 -04:00
Behdad Esfahbod
4a27f60d35 [varLib] More refactoring 2017-05-31 19:22:48 -04:00
Behdad Esfahbod
5ee58772cf [varLib] Improve IUP DP 
Previously, it was always encoding first and last point.  Now it only always
encodes last point.  Soon resolving that too.  Shows another 0.5% savings in
gvar table size with Noto Sans Arabic.
 2017-05-31 19:14:17 -04:00
Behdad Esfahbod
0b8c9e3a0c Revert "[varLib] Flip IUP DP to go back-to-front" 
This reverts commit 3e35441c805b03d6d6eea5b24ce44f555c5fad56.

The DP is cleaner to work out front-to-back.
Will achieve the same effect by flipping the lists in a later commit.
 2017-05-31 19:11:30 -04:00
Behdad Esfahbod
28ce62b782 [varLib] Refactor DP code into functions 2017-05-31 19:06:42 -04:00
Behdad Esfahbod
7db5868dba [varLib] Minor 2017-05-31 19:00:33 -04:00
Behdad Esfahbod
c79c27a841 [varLib] Add commentary of IUP DP mechanism 2017-05-29 16:13:46 -04:00
Behdad Esfahbod
3e35441c80 [varLib] Flip IUP DP to go back-to-front 
Saves a few bytes (really, a few!).
 2017-05-29 16:03:42 -04:00
Behdad Esfahbod
eeb13bba88 [varLib] Prepare IUP DP code to go back-to-front 
That would produce smaller point numbers, which sometimes, results in
smaller encoding.
 2017-05-29 15:59:29 -04:00
Behdad Esfahbod
c87c592d9e [varLib] Minor IUP renaming 
Same functionality
 2017-05-29 15:29:20 -04:00
Behdad Esfahbod
db8d0eeb5f [varLib] Speed up IUP optimization DP by 7.5x! 2017-05-29 15:06:55 -04:00
Behdad Esfahbod
2e80784ca7 [varLib] Use geometric distance for tolerance calculations 2017-05-28 23:45:36 -07:00
Behdad Esfahbod
1d148b10c5 [varLib] Start implementing optimal IUP solution 
Not optimal right now, since first and last point are always included.
Also rather slow.  Takes about 12s for NotoSansArabic, and saves just
one percent in gvar size with a tolerance of 0.5 font units.
 2017-05-28 23:45:36 -07:00
Cosimo Lupo
fd3cd6f367 Merge pull request #969 from fonttools/varlib-iup 
Varlib iup
 2017-05-24 11:44:59 +01:00
Cosimo Lupo
a4861a16cc
use logging.warning() instead of deprecated logging.warn() 
functionality is identical, the latter is deprecated:
https://docs.python.org/3/library/logging.html#logging.Logger.warning
 2017-05-24 09:49:37 +01:00
Khaled Hosny
61670fc652 Use logging module for these warnings 
Not sure if warnings module was used intentionally here, but the
messages looked odd compared to other FontTools messages.
 2017-05-24 10:00:55 +02:00
Behdad Esfahbod
0ed2df3f22 [varLib.interpolate_layout] Import designspace-loading logic from varLib 
When varLib was updated for avar table, this was not.  Share code such
that they don't get out of sync again.  All of this to be made into
proper API some time...
 2017-05-22 19:40:20 -07:00
Behdad Esfahbod
bfb4a2c648 [varLib] Pass down tolerance to IUP routines 2017-05-18 16:29:02 -07:00
Behdad Esfahbod
74f6715f27 [varLib] Minor speedup 2017-05-18 16:08:36 -07:00
Behdad Esfahbod
3db5be2195 [gvar] Remove GlyphCoordinates.__abs__() 
It's not wel-defined, as abs typically is supposed to return a scalar...

Also combine the tolerance-check with the zero-check in varLib.
 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
e46f94950c Change GlyphCoordinates.__bool__() semantics... 
...to match those of other iterables.

I confused myself once already by having "if not delta" where delta was a list,
not GlyphCoordinates...
 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
e8571ee5e0 [varLib] Only use sparse points (ala IUP encoding) if cheaper 
For now, this makes us encode one point per contour if feasible.
 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
f8c970568c [varLib] Fix assert condition in _optimize_delta for empty contours 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
52e2e2f930 [varLib] make _optimize_contour work with lists 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
11227eb481 [varLib] Fix assert message 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
a5b1285223 [varLib] Start IUP-optimization code 2017-05-18 16:06:10 -07:00
Behdad Esfahbod
656478fc6d [varLib] Add notes re encoding multilingual names 2017-04-19 11:10:00 -07:00
Behdad Esfahbod
932b938d7d [varLib] Minor 2017-04-12 21:56:49 -07:00
Behdad Esfahbod
968c25dd7f [varLib] Generate avar table 
Fixes https://github.com/fonttools/fonttools/issues/916
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
191cea5965 [varLib] Fixup for 91f4fd90d4fdee293052d9d226a31baa2e7edda8 
Oops!  Too many Axis classes.
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
0fa41c14b9 [varLib] Check all master and instance locations are valid 
Ie. they don't specify any unknown axes, and location is within
axis minimum/maximum.  We also allow master / instance locations
to not specify some axes, and we fill in the axis default for those.
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
9034f4f3f1 [varLib] Rewrite axis configuration code 
We do not accept nonstandard axes if <axes> element is not present.
Breaks one test.  Needs updated expectations.

Soon we'll be generating avar as well and all will be better, much better.
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
e73cc7ae34 [varLib] Move code around 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
51fd216c62 [varLib] Towards encoding all name languages 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
80c020d260 [varLib] Remove "custom" axis 
This was added before when glyphsLib was always exporting the (unused)
custom axis.  It doesn't now, so remove.
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
242faa798a [varLib] Remove unused build(..., axisMap) argument 
Axis map should be specified in designspace file now.
 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
c922962056 [varLib] Minor 2017-04-12 21:54:43 -07:00
Behdad Esfahbod
8c62165008 [varLib] Build MVAR table 
Does not implement gasp table variations, but the rest should work.
 2017-04-11 11:10:54 -07:00
Behdad Esfahbod
43060a0d08 [varLib] Do not encode gvar deltas if all values smaller than tolerance 
Tolerance is set to .5 by default.  Most designspaces never hit this since
for most, all deltas are integers anyway.  Moreover, all such detas will
round to zero anyway.
 2017-04-05 15:43:14 +02:00
Behdad Esfahbod
b572ae6c5b [varLib] Do not encode gvar deltas that are all zeroes 2017-04-05 15:43:14 +02:00