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Author SHA1 Message Date
Matthias Clasen
5f40db5043 Add gsk_curve_offset 
This method creates an offset curve from an existing
curve by just moving the control points laterally.

This will be used in stroking.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
afd398112b Add conic decomposition tests 
We don't have good error bounds here, unfortunately.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
98591b383b path: support conic->curve in foreach 2021-12-04 22:58:23 -05:00
Matthias Clasen
319e75c73f Add gsk_curve_decompose_curve 
This is mainly useful for decomposing a conic into
cubics. The criterion here for terminating the
subdivision is very improvised.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
c80d5f89d8 Add a performance test for curve eval 
All curve types are equally fast here.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
8dd4f022c1 Add a performance test for curve intersection 
This shows how much more expensive curve
intersections are.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
ee42889790 Add curve split tests 2021-12-04 22:58:23 -05:00
Matthias Clasen
bd0f92fa8b Add another intersection testcase 
This tests horizontal line/conic intersection,
which failed before the fix in the previous commit.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
c438527e49 xxx: work around bounding box problems 
graphene_rect_intersect returns FALSE when you
intersect the bounding boxes of axis-aligned
lines, so we never find intersections with those.

Make things better by making the bounding boxes worse.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
dad4e1da22 Add curve intersection tests 
These tests check that gsk_curve_intersect finds
the intersections we want.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
52394b1520 Add gsk_curve_intersect 
Add a way to find the intersections of two curves.
This will be used in stroking.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
3efd6c9a12 Add gsk_curve_get_bounds 
Add getters for bounding boxes of curves.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
6d04869c85 Only test conic weights between 1/20 and 20 
The rest just give us no end of numeric trouble.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
5781a8c66a xxx: Link ottie tests against libottie 2021-12-04 22:58:23 -05:00
Matthias Clasen
65813c3f19 xxx: Link ottie tools against libottie 2021-12-04 22:58:23 -05:00
Benjamin Otte
33d5acf1db Ottie: Add ottie-editor 2021-12-04 22:58:23 -05:00
Benjamin Otte
d0d62ee0d6 ottie: Add a snapshot testsuite test 
The test takes a lottie file and a timestamp in seconds and produces a
rendernode at that timestamp.

It then serializes that node and compares it via diff(1) with a file
containing the expected output.

This is a lot stricter than it needs to be (because different node files
can generate the same output and updates to the rendering pipeline can
break everything) but I chose this method on purpose because it does a
good job at guarding against accidental changes in other parts of the
code.

It's also better than comparing image output because it avoids
antialiasing artifacts when using curves and things like that.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
e359e0b146 ottie: Add a command-line tool 
Supports:

 * Taking a screenie:
   ottie image file.lottie image.png

 * Recording a rendernode:
   ottie node file.lottie render.node

 * Encoding an image:
   ottie video file.lottie video.webm
 2021-12-04 22:58:23 -05:00
Benjamin Otte
4a633e4476 Ottie: Add 2021-12-04 22:58:23 -05:00
Benjamin Otte
78c2fca48e path: Add gsk_path_builder_add_ellipse() 2021-12-04 22:58:23 -05:00
Benjamin Otte
9b93dcbbd8 path: Change semantics of gtk_path_builder_add_segment() 
Allow start >= end to mean that the path continues at the beginning
after reaching the end until it reaches the point at @end.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
5acdc8358e path: Add gsk_path_measure_is_closed () 2021-12-04 22:58:23 -05:00
Benjamin Otte
9ecd508b86 path: Add gsk_path_measure_restrict_to_contour() 2021-12-04 22:58:23 -05:00
Matthias Clasen
452eb951d7 Add gsk_path_measure_get_{path,tolerance} 
These are just nice apis to have and avoid having to carry
these around as extra arguments in many places.

This was showing up as inconvenience in writing tests
for the measure apis.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
a6e665c6f3 gtk-demo: Use dashes in path-fill demo 2021-12-04 22:58:23 -05:00
Matthias Clasen
19f2eddf46 Add gsk_path_get_stroke_bounds 
A relatively cheap way to get bounds for the area
that would be affected by stroking a path.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
a79d427a4b testsuite: Add tests for the dasher 2021-12-04 22:58:23 -05:00
Benjamin Otte
f9d794d315 path: Add a foreach function that dashes a path 2021-12-04 22:58:23 -05:00
Benjamin Otte
75b96fa7cf path: Deal with non-uniformness of progress parameter 
The progress is non-uniform, so simple translation of progress doesn't work.
So check if larger and smaller values inch closer towards minimal distance.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
a5763a3de1 path: Always decompose conics into at least 2 segments 
Conics are evil in that their parameter skews towards the center, and if
it's a very flat conic (weight almost equal to 0), then we'd approximate
it with a single segment and not subdivide, which would cause the
parameter to be wildly off around 0.25 or 0.75.

And that would cause offset calculations to fail.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
6c9206d46a testsuite Add curve tangent tests 2021-12-04 22:58:23 -05:00
Benjamin Otte
918b07967c testsuite: Add a test for the conic that got us segment() 2021-12-04 22:58:23 -05:00
Benjamin Otte
2f3aae002d path: Add gsk_curve_segment() 
Using split() twice with scaled t values does not work with conics.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
a1f9a45f17 testsuite: Add a test for gsk_curve_decompose() 2021-12-04 22:58:23 -05:00
Benjamin Otte
57cf7e6fc2 testuite: Add tests for gsk_curve_get_tangent() 2021-12-04 22:58:23 -05:00
Matthias Clasen
5c817aef62 testuite: Add tests for gsk_curve_get_point() 
Add a few tests for gsk_curve_get_point().

Since GskCurve is not public api, we add gskcurve.c
as source to the test binary.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
b7c83ce45c curve: Split eval() into get_point() and get_tangent() 
That's more in line with the get_start/end_point/tangent() functions.

Plus, those calls are independent and we usually want one or the other.
 2021-12-04 22:58:23 -05:00
Matthias Clasen
8b13ea22be Add gsk_curve_get_{start,end}_tangent 
Add a way to get the tangents at the start and end of the curve.
This will be used in stroking.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
a21b3c7337 testsuite: Add conics to the random paths 2021-12-04 22:58:23 -05:00
Benjamin Otte
eb04db32e0 path: Add GskCurve 
GskCurve is an abstraction for path operations. It's essentially a
collection of vfuncs per GskPathOperation.

GskStandardContour has been ported to use it where appropriate.
 2021-12-04 22:58:23 -05:00
Benjamin Otte
faf0c8d1f9 path: Introduce gskpathop 
A gskpathop is a pointer to a graphene_point_t* with the low bits used
to encode the GskPathOperation. It's an easy way to introduce API for
operations.

So far it's just used to replace GskStandardOperation.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
2f91089b71 WIP: css: Replace border rendering code with GskPath 
The weight is wrong still, I need to compute the correct one to get real
45deg circle corners and not just roughly correct ones.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
b0a1b4f672 WIP: pathbuilder: Add gsk_path_builder_add_rounded_rect() 
It works, but does not use a custom contour yet.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
599baee1c4 path: Add conic curves 
So far this just adds the API, if you use it, you'll get lots of
g_warnings().

This will be fixed in future commits.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
51d645168f path: Rename to gtk_path_builder_add_segment() 
It's about bulding paths, not about measuring them.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
5991f4b6c9 path: Split contours into their own file 
I'm not sure I want to keep all contours in one file, but for now that's
how it is.
 2021-12-04 22:43:32 -05:00
Benjamin Otte
a41b9ebec7 path: Make all private contour APIs take a GskContour 
... instead of a path, index tuple.
 2021-12-04 22:43:32 -05:00
Matthias Clasen
50098ba75b Add a nodeparser tests for fill and stroke nodes 2021-12-04 22:43:32 -05:00
Benjamin Otte
c804a3863e stroke: Add support for dashes 
... and hook it up in the node parser and for Cairo rendering.
 2021-12-04 22:43:32 -05:00
Matthias Clasen
a94a8857cc gsk: Implement parsing fill and stroke nodes 
Make serialization and deserialization work for stroke and
fill nodes.
 2021-12-04 22:43:31 -05:00