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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "RenderNodeDrawable.h"
#include "SkiaUtils.h"
#include <SkCanvas.h>
#include <SkDrawable.h>
#include <ui/FatVector.h>
namespace android {
namespace uirenderer {
namespace skiapipeline {
class SkiaDisplayList;
class EndReorderBarrierDrawable;
/**
* StartReorderBarrierDrawable and EndReorderBarrierDrawable work together to define
* a sub-list in a display list that need to be drawn out-of-order sorted instead by render
* node Z index.
* StartReorderBarrierDrawable will sort the entire range and it will draw
* render nodes in the range with negative Z index.
*/
class StartReorderBarrierDrawable : public SkDrawable {
public:
explicit StartReorderBarrierDrawable(SkiaDisplayList* data);
protected:
virtual SkRect onGetBounds() override { return SkRectMakeLargest(); }
virtual void onDraw(SkCanvas* canvas) override;
private:
int mEndChildIndex;
int mBeginChildIndex;
FatVector<RenderNodeDrawable*, 16> mChildren;
SkiaDisplayList* mDisplayList;
friend class EndReorderBarrierDrawable;
};
/**
* See StartReorderBarrierDrawable.
* EndReorderBarrierDrawable relies on StartReorderBarrierDrawable to host and sort the render
* nodes by Z index. When EndReorderBarrierDrawable is drawn it will draw all render nodes in the
* range with positive Z index. It is also responsible for drawing shadows for the nodes
* corresponding to their z-index.
*/
class EndReorderBarrierDrawable : public SkDrawable {
public:
explicit EndReorderBarrierDrawable(StartReorderBarrierDrawable* startBarrier);
protected:
virtual SkRect onGetBounds() override { return SkRectMakeLargest(); }
virtual void onDraw(SkCanvas* canvas) override;
private:
void drawShadow(SkCanvas* canvas, RenderNodeDrawable* caster);
StartReorderBarrierDrawable* mStartBarrier;
};
} // namespace skiapipeline
} // namespace uirenderer
} // namespace android
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