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Sketching a thin (as in close-to-skia-semantics) scene graph API, focused on
external animation, inval tracking and minimal repaint.
Only a few concrete classes/features so far:
* Rect/Color/Transform/Group
* basic inval tracking
* a trivial animated sample with inval visualization
Pretty much everything (especially naming) is volatile, so treat accordingly.
The interesting bits to review are likely in Node.{h,cpp} for inval and
SampleSGInval.cpp for usage.
Initial class hierarchy:
* Node: invalidation/ancestors tracking
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-- * RenderNode: onRender(SkCanvas)
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| -- * Draw (concrete): rendering a [geometry, paint] tuple
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| -- * Group (concrete): grouping multiple RenderNodes
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| -- * EffectNode: single-descendant effect wrapper
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| -- * Transform (concrete): transform effect
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-- * PaintNode: onMakePaint()
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| -- * Color (concrete): SkColor paint wrapper
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-- * GeometryNode: onComputeBounds(), onDraw(SkCanvas, SkPaint)
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-- * Rect (concrete): SkRect wrapper
TBR=
Change-Id: Iacf9b773c181a7582ecd31ee968562f179d1aa1b
Reviewed-on: https://skia-review.googlesource.com/85502
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
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Florin Malita