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.
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.
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.
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.
This commit adds the basic infrastructure for paths.
The public APIs consists of GskPath, GskPathPoint and
GskPathBuilder.
GskPath is a data structure for paths that consists
of contours, which in turn might contain Bézier curves.
The Bezier data structure is inspired by Skia, with separate
arrays for points and operations. One advantage of this
arrangement is that start and end points are shared
between adjacent curves.
A GskPathPoint represents a point on a path, which can
be queried for various properties.
GskPathBuilder is an auxiliary builder object for paths.
