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Author SHA1 Message Date
Matthias Clasen
468863a8b9 gtk-demo: Don't hardcode a title font 
We want a large font size, but we don't have to
hardcode Sans.
 2022-04-06 23:59:47 -04:00
Matthias Clasen
95a3d3c26f Add a demo for path ops 2022-04-06 23:59:17 -04:00
Matthias Clasen
df1bca3027 Add some tests for pathops 2022-04-06 23:59:17 -04:00
Matthias Clasen
acf81a0377 path: Implement path ops 
Implement boolean operations on paths.
 2022-04-06 23:59:17 -04:00
Matthias Clasen
bf8fca391a path: Add gsk_path_transform 
This is an obvious operation to want for paths.
 2022-04-06 23:57:28 -04:00
Matthias Clasen
aa722dcfac path: Add gsk_path_is_convex 
Add a function to compute whether a path is convex.
 2022-04-06 23:52:03 -04:00
Matthias Clasen
f5ccf63550 path: Add gsk_path_get_flags 
The flags contain some useful information.
 2022-04-06 23:52:03 -04:00
Matthias Clasen
61f9b1d9e0 path: Add gsk_path_reverse 
This is a natural operation, and useful for debugging things.
 2022-04-06 23:52:03 -04:00
Matthias Clasen
aa8ba37a0f curve: Cosmetics 2022-04-06 23:47:35 -04:00
Matthias Clasen
86c1493b4b contour: Fix winding for circle contour 
Test included.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
f58513e4dd path: Fix gsk_path_measure_in_fill 
This was getting some simple polygon cases wrong :(

The problem here is a misunderstanding in line_get_crossing.
It was returning 'on edge' when a point of the polygon is
on the ray, which is not what 'on edge' is about.

Add some test cases involving horizontal edges that coincide
with the test point.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
c816eee4d1 curve: Add more line-curve intersection tests 2022-04-06 23:47:35 -04:00
Matthias Clasen
436fe18084 curve: Add another intersection test 2022-04-06 23:47:35 -04:00
Matthias Clasen
3ba2659860 curve: Specify tolerance for intersections 
We had 0.1 hardcoded in a bunch of places.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
ffc5fdb9de Add a debug key for paths 
Not used yet.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
e88cf34642 curve: Add gsk_curve_print for debugging 2022-04-06 23:47:35 -04:00
Matthias Clasen
5eb79b3b01 curve: Move some curve apis to gskcurve.c 
Some of this will be reused elsewhere, so move
it out of gskpathstroke.c.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
cf793f94ac curve: Use GskBoundingBox 2022-04-06 23:47:35 -04:00
Matthias Clasen
ba405bfbf1 Add a bounding box type 
graphene_rect_t does not quite work for this purpose.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
4b6223e07d curve: Handle self-intersection 2022-04-06 23:47:35 -04:00
Matthias Clasen
8637ea8fb8 curve: Small improvement 2022-04-06 23:47:35 -04:00
Matthias Clasen
ab8a32bc76 curve: Refine line-line intersection 
For collinear line segments, return up to 2 intersections
for the endpoints of the intersection (which is also a
line segment in this case).

Tests included.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
6aa38e6b39 curve: Fix line-curve intersections 2022-04-06 23:47:35 -04:00
Matthias Clasen
46bef9b667 curve test: Fix the split test 
We were misinterpreting the return value of
gsk_path_measure_get_closest_point.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
86862d56bd curve: Skip a failing test 
We don't have a good error bound for approximating
conics. Until that changes, skip this test.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
1e5c025a1e curve: Add another intersection test 2022-04-06 23:47:35 -04:00
Matthias Clasen
60f87f2a7d path: Fix a typo 2022-04-06 23:47:35 -04:00
Matthias Clasen
001903aeef contour: Add some docs 2022-04-06 23:47:35 -04:00
Matthias Clasen
3b04f5a963 Allow showing points in curve2 test 
This is useful for debugging intersections.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
de29a01682 gsk: Use stroke bounds in the stroke node 
We can use gsk_path_get_stroke_bounds to get a
better estimate for the bounds of the stroke node.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
bd3b88b276 gtk-demo: Use gsk_path_builder_add_layout 
We have an api now to hide the cairo use.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
e7a9030fb5 gsk: Add gsk_path_builder_add_layout 
This api makes it easy to turn text into a path that
can be further manipulated. The implementation currently
goes via cairo.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
98aca9e2cd curve2: Show osculating circles 2022-04-06 23:47:35 -04:00
Matthias Clasen
6e8b23d485 Add gsk_path_measure_get_curvature 2022-04-06 23:47:35 -04:00
Matthias Clasen
05678d44ca Add an interactive path test 
This one is for interactive exploring of svg paths.

You can enter an SVG path in the entry and hit Enter
to see how GSK renders it. If you click the button
in the headerbar, you can see what GTK thinks the
closest point, tangent and distance are wrt. to the
mouse position, and the bounding box of the path.

There's also stroke parameters to play with.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
7b4bc08254 stroke: Make gsk_stroke_to_cairo public 
It comes in handy, and does no harm.
 2022-04-06 23:47:35 -04:00
Matthias Clasen
3b81a9e529 gtk-demo: Add a curve editor demo 2022-04-06 23:47:35 -04:00
Matthias Clasen
6a0901c40e Implement offsetting 
Implement offsetting of paths by reusing the
infrastructure of the stroker.
 2022-04-06 23:47:33 -04:00
Matthias Clasen
a7b3a0c472 Add gsk_path_offset 
Add a function that takes a path, and offsets it
by some distance, applying line-join parameters
as needed.

This commit just adds the api, the implementation
will be in the following commit.
 2022-04-06 23:47:08 -04:00
Matthias Clasen
645eddf838 stroker: Implement arcs 
Implement arced joins as specified in SVG2.
 2022-04-06 23:47:08 -04:00
Matthias Clasen
ada1cc7dc5 Add GSK_LINE_JOIN_ARCS 
Implementation will follow.
 2022-04-06 23:47:08 -04:00
Matthias Clasen
042a3a1344 Add another stroker test 
Check that the outlines of random paths look as
expected. We currently have to exclude paths where
points get too close to each other.
 2022-04-06 23:47:08 -04:00
Matthias Clasen
2542d913bc Add basic tests for strokes 
Add tests to check that any point on a path is
always at most half the line-width away from the
stroke path with that line-width.
 2022-04-06 23:47:08 -04:00
Matthias Clasen
fc619b9783 Implement stroking 
Implement gsk_contour_default_add_stroke, which takes a contour
and stroke parameters, and adds contours to a path builder for
the outline that would be produced by stroking the path with these
parameters.

The current implementation does not try to handle short segments
in the vicinity of sharp joins in any special way, so there can
be some artifacts in that situation.
 2022-04-06 23:47:06 -04:00
Matthias Clasen
3c56f326fc Special-case circles for strokes 
The outline of a circle is just two circles.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
4c81600fc9 Special-case rects for strokes 
In many cases, the outline of a rectangle is just
two rectangles.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
68661b7291 Add gsk_path_stroke 
Add the plumbing that will let us do special-case stroking
for rectangles, circles and other special contours. There
is no implementation yet.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
b6a2a8b0fc Add gsk_curve_get_curvature 
This will be used in the stroker.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
d08802a2c3 Add gsk_curve_get_normal 
Its easy but thats no reason not to have this api.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
759bf152d3 Add a test for gsk_curve_offset 
The stroker relies on offsetting.
This only tests a few very simple cases.
 2021-12-04 22:58:23 -05:00