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51 Commits

Author SHA1 Message Date
Matthias Clasen
25acc26531 contour: Simplify add_segment for circles 
We no longer need to translate path points.
 2023-09-21 11:40:25 -04:00
Matthias Clasen
d849a53b98 contour: Fix get_closest_point for circles 2023-09-20 22:11:47 -04:00
Matthias Clasen
9c159cf129 path: Tweak printing a bit more 
We are dealing with floats here, so using
g_ascii_dtostr isn't really the best.

Update affected tests.
 2023-09-17 22:35:33 -04:00
Matthias Clasen
957d494090 contour: Make circles and rounded rects match 
Make sure that we print the weights in the
same way (as floats).

Update affected tests.
 2023-09-17 20:32:32 -04:00
Matthias Clasen
4d71ff6da1 contour: Fixes for circles 
Make circle contours use 'foreach coordinates' for
its points. This works here, but not for general
conics. As with the other custom contours, avoid
emitting collapsed conics.
 2023-09-16 08:27:18 -04:00
Matthias Clasen
6d001f79f9 contour: Fixes for rounded rects 
Similar to the fixes for rect contours:
Handle all the special cases where empty curves
are omitted, and omit 'empty' curves in foreach.
 2023-09-15 16:31:09 -04:00
Matthias Clasen
abebd92b19 contour: Fixes for rect contours 
Handle all the special cases (zero width and/or height),
and omit 'empty' curves in foreach.
 2023-09-15 16:31:09 -04:00
Matthias Clasen
de724b2a57 contour: Fix some corner cases 
Adding segments of rects or rounded rects was
not working right in cases where some of the
curves are trivial. Fix that.
 2023-09-15 16:31:09 -04:00
Matthias Clasen
061637f4eb contour: Small refactoring 
Move some utilities out.
 2023-09-15 16:31:09 -04:00
Matthias Clasen
dab1897d4e contour: Circle cosmetics 2023-09-15 16:31:09 -04:00
Matthias Clasen
ea7fd1ff5a contour: Fixup for 1-point contours 
If we return a path point for a 1-point contour,
make it { n, 0, 1 }.
 2023-09-04 00:55:21 +02:00
Matthias Clasen
9bd9b6f2ca contour: Make sure stroke bounds are sufficient 2023-09-03 23:04:47 +02:00
Matthias Clasen
11b219bc61 Drop tolerance from gsk_contour_foreach 
There is no decomposition going on for any contours,
and the tolerance argument is entirely unused.
Decomposition and tolerance is handled entirely
in gskpath.c by its trampoline.
 2023-08-28 20:52:22 -04:00
Matthias Clasen
2e24a9ece4 Make GskPathPoint public 
The contents are still /*< private >*/, but we
let our tests and the debugger see them, which
helps.
 2023-08-28 00:07:50 -04:00
Matthias Clasen
2a17320314 Limit rect variation in path builder 
Make gsk_path_builder_add_rect always
produce a clockwise rectangle. This matches
what we do for circles and rounded rects,
which also go clockwise. Note that we
still need to allow negative widths in
the contour code, to implement reverse().
 2023-08-28 00:07:50 -04:00
Matthias Clasen
0dbff14555 Allow circles with radius of zero 
Not very useful, but we allow rects with
width and height of zero, so lets be consistent.
Curvature is infinite for such contours.

Tests included.
 2023-08-28 00:07:50 -04:00
Matthias Clasen
6f3be310f4 contour: Simplify gsk_circle_contour_foreach 
Use the same approach as the rounded rect contour.
 2023-08-27 21:31:40 -04:00
Matthias Clasen
2ca9982b91 rect contour: Avoid nans in corner cases 
The length of rect contours can be zero,
so we much check before we divide.
 2023-08-27 19:17:02 -04:00
Matthias Clasen
02a9652af4 Use a more compact representation for circles 
Print circles as M-o-o-o-o-z.
 2023-08-27 14:32:21 -04:00
Matthias Clasen
0a28a5d53a Add a rectangle contour 
Add a contour that optimizes some things for
rectangles. Also add rectangle detection to the
path parser, and add tests similar to what we
have for the other special contours.
 2023-08-27 12:36:56 -04:00
Matthias Clasen
b5dd9dae0d rounded rect contour: Fix an oversight 
The close operation takes 2 points, so our array
was one too short. Oops.
 2023-08-27 10:09:32 -04:00
Matthias Clasen
ebcb518e4f Cosmetics 2023-08-27 09:50:16 -04:00
Matthias Clasen
b7ea22f168 Drop unused code 
Nobody is calling gsk_contour_get_start_end, so drop
this internal API.
 2023-08-27 09:39:59 -04:00
Matthias Clasen
cee043f977 Add a rounded rect contour 
This special contour takes advantage of its
rounded-rect-ness for speeding up bounding
boxes and winding numbers. It falls back
to the standard contour code for everything
else.
 2023-08-27 09:29:19 -04:00
Matthias Clasen
ba3a657c48 contour: Add some debug API 
Add a private  way to get the class of a contour,
so we can test that roundtrips through gsk_path_parse
work as expected.
 2023-08-27 09:13:32 -04:00
Matthias Clasen
5f2f116c28 circle contour: Fix a typo 2023-08-27 07:43:55 -04:00
Matthias Clasen
167b38dfa1 contour: Some reactoring 
Make a default print implementation, and use it.
 2023-08-26 23:42:52 -04:00
Matthias Clasen
0fce24674a path: Add a circle contour 
This special contour takes advantage of the
circle definition to speed up things like
hit testing and closest point determination.
 2023-08-26 23:42:52 -04:00
Matthias Clasen
99ad585252 Merge branch 'measure-speedups' into 'main' 
contour: Stop doing the roundtrip test

See merge request GNOME/gtk!6342
 2023-08-27 01:13:41 +00:00
Matthias Clasen
6defdb4e8a Drop unused code 
we are not using any gsk_spline functions currently.
 2023-08-26 11:29:09 -04:00
Matthias Clasen
c989a06718 pathmeasure: compute samples on demand 
Only do the work for a curve the first time
we need it. This should greatly speed up
use cases where you only create a measure
to get the length of the path.
 2023-08-26 10:23:02 -04:00
Matthias Clasen
57918813e2 contour: Stop doing the roundtrip test 
Doing inverse arclength computations is
a very high overhead operation. And the
tests still pass without it.
 2023-08-26 09:39:49 -04:00
Matthias Clasen
553499522c contour: Add measure API 
In order to compute path lengths efficiently, we need
to cache lookup tables. This commit adds API to let
contours allocate and free such measure data, as well
as API to use the data to go length -> point and
vice versa.
 2023-08-25 20:16:49 -04:00
Matthias Clasen
25e6231a88 path: Switch back to conics 
Arcs were appealing, but they have a fatal flaw: we can't
split our arcs without changing the ellipse they trace.
That could be fixed by adding an extra parameter, but then
it is no longer any better than conics.

So switch back to conics, which have the advantage that they
are used elsewhere.
 2023-08-25 07:33:16 -04:00
Matthias Clasen
e1faf28310 Make curvature api more flexible 
Add an extra direction argument to get_curvature to
allow picking the limit on either side, for sharp turns.

Update all callers.
 2023-08-24 14:32:33 -04:00
Matthias Clasen
d33ed4f9ab path: Add elliptical arcs 
Add a new curve type for elliptical arcs
and use it for rounded rectangles and circles.
We use the 'E' command to represent elliptical
arcs in serialized paths.
 2023-08-23 12:43:52 -04:00
Matthias Clasen
486674927a Make sure stroke bounds are big enough 
Our standard 'empty path' in gtk4-node-editor
was getting its pointy corners cut off.
 2023-08-21 23:59:08 -04:00
Matthias Clasen
0c39890e0f contour: Optimize bounds 
Cache the bounds in the contour, and compute
the stroke bounds based on it as well.
 2023-08-18 10:02:14 -04:00
Matthias Clasen
73853f1a6b contour: Add an assertion 2023-08-16 16:18:38 -04:00
Matthias Clasen
125ea90894 Rename an internal function 
We want the number of ops, not the number of points.
 2023-08-16 15:54:46 -04:00
Matthias Clasen
45aa8e4e00 Fix GskStandardContour to have a 'good' size 
We need the size of GskStandardContour to be
at least as aligned as graphene_point_t, or
things break in hard to debug ways.
 2023-08-14 15:59:45 -04:00
Matthias Clasen
a85ab3585e Revise gsk_path_point_get_tangent 
Update the directions enum to allow all four
tangents to be obtained. Add an illustration
to the docs for clarity.

Update all callers.
 2023-08-14 14:58:22 -04:00
Matthias Clasen
4b7e1b1233 Fix gsk_path_builder_add_segment 
We were splitting the last segment, but did not
actually use the result of the split. Oops.
 2023-08-13 09:40:19 -04:00
Matthias Clasen
b7544636d4 contour: Skip the move 
When jumping between segments, we always
need to skip index 0, since thats the move.

This fixes the tangent checks in the
rectangle tests.
 2023-08-09 15:12:58 -04:00
Matthias Clasen
6220baf230 get_closest_point: Prefer earlier points 
Only switch to a later point if it is strictly
closer than the existing match. This fixes
start- vs endpoint confusion in the rectangle
tests.
 2023-08-09 15:12:52 -04:00
Matthias Clasen
f707185248 Add gsk_path_builder_add_segment 
With GskPathPoint, we can subset paths without
a measure object.
 2023-08-09 07:01:01 -04:00
Matthias Clasen
ded30049db path: Add gsk_path_get_start/end_point 
These are useful to have, now that we are
relying more on GskPathPoint in our api.
 2023-08-08 22:05:34 -04:00
Matthias Clasen
c35bb11c18 Simplify GskPathPoint 
Use simple representation of just
{ contour index, segment index, t value }
 2023-08-08 20:31:56 -04:00
Matthias Clasen
c37c29422a Add gsk_path_get_stroke_bounds 
This is a helper to compute the bounds for
stroke nodes. We keep it private for now.
 2023-08-07 13:02:57 -04:00
Matthias Clasen
9b916b329a pathpoint: Implement get_tangent fully 
We were not taking the direction into account
at all.
 2023-08-07 08:33:05 -04:00