This adds a new abstract 'Canvas' which is similar to SkCanvas.
PaintContext implements Canvas while still having its
own commit() method to cause the paint actions to apply to
the Element for the next frame.
This adds a new PictureRecorder which also implements Canvas
and has an endRecording() method which returns a Picture
(another new interface) which can be held from Dart.
There is also now a rootPicture setter on Document which takes
a Picture and will then make the Document draw that Picture
until changed.
This piggybacks on the existing custom painting system
which adds the painting at background-and-borders paint
time so technically if you both set rootPicture as well as
construct a DOM you will draw the DOM on top of your picture. :)
R=mpcomplete@chromium.org
Review URL: https://codereview.chromium.org/1122423009
Instead of running paint requests during microtasks, we run them after updating
layout for the current frame. After draining all the paint requests, we then
drain whatever commits are available.
It's still possible that requestPaint callbacks can dirty style and layout
information, so we need to clean that information after servicing the requests.
Ideally we'd block these callbacks from dirtying style or layout information.
R=ojan@chromium.org
Review URL: https://codereview.chromium.org/1027563002
This CL adds just enough custom painting to Sky to make
sky/examples/painting/circle.sky draw a circle. Over time, we should be able to
elaborate this system into something interesting and to make it actually work
in a reasonable way.
R=ojan@chromium.org
Review URL: https://codereview.chromium.org/1017593005
This CL is a first step towards custom paint. It introduces a class that can
draw a circle into an SkPicture. Future CLs will wire the SkPicture into the
render tree and expose this object to script.
R=ojan@chromium.org
Review URL: https://codereview.chromium.org/1017373003
