skia2/experimental/sksg/SkSGRenderNode.h
Florin Malita 4aa4441186 Initial scene graph (SkSG)
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
  |
   -- * RenderNode: onRender(SkCanvas)
  |   |
  |    -- * Draw (concrete): rendering a [geometry, paint] tuple
  |   |
  |    -- * Group (concrete): grouping multiple RenderNodes
  |   |
  |    -- * EffectNode: single-descendant effect wrapper
  |       |
  |        -- * Transform (concrete): transform effect
  |
   -- * PaintNode: onMakePaint()
  |   |
  |    -- * Color (concrete): SkColor paint wrapper
  |
   -- * GeometryNode: onComputeBounds(), onDraw(SkCanvas, SkPaint)
      |
       -- * 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>
2017-12-21 20:56:32 +00:00

37 lines
636 B
C++

/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSGRenderNode_DEFINED
#define SkSGRenderNode_DEFINED
#include "SkSGNode.h"
class SkCanvas;
namespace sksg {
/**
* Base class for nodes which can render to a canvas.
*/
class RenderNode : public Node {
public:
// Render the node and its descendants to the canvas.
void render(SkCanvas*) const;
protected:
RenderNode();
virtual void onRender(SkCanvas*) const = 0;
private:
typedef Node INHERITED;
};
} // namespace sksg
#endif // SkSGRenderNode_DEFINED