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>
57 lines
1.2 KiB
C++
57 lines
1.2 KiB
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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#include "SkSGGroup.h"
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namespace sksg {
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Group::Group() {}
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Group::~Group() {
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for (const auto& child : fChildren) {
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child->removeInvalReceiver(this);
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}
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}
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void Group::addChild(sk_sp<RenderNode> node) {
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// should we allow duplicates?
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for (const auto& child : fChildren) {
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if (child == node) {
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return;
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}
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}
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node->addInvalReceiver(this);
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fChildren.push_back(std::move(node));
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}
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void Group::removeChild(const sk_sp<RenderNode>& node) {
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int origCount = fChildren.count();
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for (int i = 0; i < origCount; ++i) {
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if (fChildren[i] == node) {
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fChildren.removeShuffle(i);
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node->removeInvalReceiver(this);
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break;
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}
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}
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SkASSERT(fChildren.count() == origCount - 1);
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}
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void Group::onRender(SkCanvas* canvas) const {
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for (const auto& child : fChildren) {
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child->render(canvas);
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}
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}
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void Group::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
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for (const auto& child : fChildren) {
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child->revalidate(ic, ctm);
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}
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}
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} // namespace sksg
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