4aa4441186
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>
52 lines
976 B
C++
52 lines
976 B
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSGGeometryNode_DEFINED
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#define SkSGGeometryNode_DEFINED
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#include "SkSGNode.h"
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#include "SkRect.h"
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class SkCanvas;
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class SkPaint;
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namespace sksg {
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/**
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* Base class for nodes which provide 'geometry' (as opposed to paint)
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* for drawing.
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*
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* Think SkRect, SkPath, etc.
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*/
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class GeometryNode : public Node {
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public:
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void draw(SkCanvas*, const SkPaint&) const;
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// SkPath asPath() const; // unused for now
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protected:
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GeometryNode();
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virtual void onDraw(SkCanvas*, const SkPaint&) const = 0;
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virtual SkRect onComputeBounds() const = 0;
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// virtual SkPath onAsPath() const = 0; // unused for now
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void onRevalidate(InvalidationController*, const SkMatrix&) override;
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private:
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SkRect fBounds;
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typedef Node INHERITED;
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};
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} // namespace sksg
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#endif // SkSGGeometryNode_DEFINED
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