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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_GPU_CA_LAYER_TREE_MAC_H_
#define CONTENT_COMMON_GPU_CA_LAYER_TREE_MAC_H_
#include <IOSurface/IOSurface.h>
#include <QuartzCore/QuartzCore.h>
#include <deque>
#include <vector>
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/scoped_nsobject.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/transform.h"
namespace content {
// The CALayerTree will construct a hierarchy of CALayers from a linear list,
// using the algorithm and structure referenced described in
// https://docs.google.com/document/d/1DtSN9zzvCF44_FQPM7ie01UxGHagQ66zfF5L9HnigQY/edit?usp=sharing
class CALayerTree {
public:
CALayerTree();
// This will remove all CALayers from this tree from their superlayer.
~CALayerTree();
// Append the description of a new CALayer to the tree. This will not
// create any new CALayers until CommitScheduledCALayers is called. This
// cannot be called anymore after CommitScheduledCALayers has been called.
bool ScheduleCALayer(bool is_clipped,
const gfx::Rect& clip_rect,
unsigned sorting_context_id,
const gfx::Transform& transform,
base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity);
// Create a CALayer tree for the scheduled layers, and set |superlayer| to
// have only this tree as its sublayers. If |old_tree| is non-null, then try
// to re-use the CALayers of |old_tree| as much as possible. |old_tree| will
// be destroyed at the end of the function, and any CALayers in it which were
// not re-used by |this| will be removed from the CALayer hierarchy.
void CommitScheduledCALayers(CALayer* superlayer,
scoped_ptr<CALayerTree> old_tree,
float scale_factor);
private:
struct RootLayer;
struct ClipAndSortingLayer;
struct TransformLayer;
struct ContentLayer;
struct RootLayer {
RootLayer();
// This will remove |ca_layer| from its superlayer, if |ca_layer| is
// non-nil.
~RootLayer();
// Append a new content layer, without modifying the actual CALayer
// structure.
bool AddContentLayer(bool is_clipped,
const gfx::Rect& clip_rect,
unsigned sorting_context_id,
const gfx::Transform& transform,
base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity);
// Allocate CALayers for this layer and its children, and set their
// properties appropriately. Re-use the CALayers from |old_layer| if
// possible. If re-using a CALayer from |old_layer|, reset its |ca_layer|
// to nil, so that its destructor will not remove an active CALayer.
void CommitToCA(CALayer* superlayer,
RootLayer* old_layer,
float scale_factor);
std::vector<ClipAndSortingLayer> clip_and_sorting_layers;
base::scoped_nsobject<CALayer> ca_layer;
private:
DISALLOW_COPY_AND_ASSIGN(RootLayer);
};
struct ClipAndSortingLayer {
ClipAndSortingLayer(bool is_clipped,
gfx::Rect clip_rect,
unsigned sorting_context_id,
bool is_singleton_sorting_context);
ClipAndSortingLayer(ClipAndSortingLayer&& layer);
// See the behavior of RootLayer for the effects of these functions on the
// |ca_layer| member and |old_layer| argument.
~ClipAndSortingLayer();
void AddContentLayer(const gfx::Transform& transform,
base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity);
void CommitToCA(CALayer* superlayer,
ClipAndSortingLayer* old_layer,
float scale_factor);
std::vector<TransformLayer> transform_layers;
bool is_clipped = false;
gfx::Rect clip_rect;
unsigned sorting_context_id = 0;
bool is_singleton_sorting_context = false;
base::scoped_nsobject<CALayer> ca_layer;
private:
DISALLOW_COPY_AND_ASSIGN(ClipAndSortingLayer);
};
struct TransformLayer {
TransformLayer(const gfx::Transform& transform);
TransformLayer(TransformLayer&& layer);
// See the behavior of RootLayer for the effects of these functions on the
// |ca_layer| member and |old_layer| argument.
~TransformLayer();
void AddContentLayer(base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity);
void CommitToCA(CALayer* superlayer,
TransformLayer* old_layer,
float scale_factor);
gfx::Transform transform;
std::vector<ContentLayer> content_layers;
base::scoped_nsobject<CALayer> ca_layer;
private:
DISALLOW_COPY_AND_ASSIGN(TransformLayer);
};
struct ContentLayer {
ContentLayer(base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity);
ContentLayer(ContentLayer&& layer);
// See the behavior of RootLayer for the effects of these functions on the
// |ca_layer| member and |old_layer| argument.
~ContentLayer();
void CommitToCA(CALayer* parent,
ContentLayer* old_layer,
float scale_factor);
base::ScopedCFTypeRef<IOSurfaceRef> io_surface;
gfx::RectF contents_rect;
gfx::Rect rect;
unsigned background_color = 0;
unsigned edge_aa_mask = 0;
float opacity = 1;
base::scoped_nsobject<CALayer> ca_layer;
private:
DISALLOW_COPY_AND_ASSIGN(ContentLayer);
};
RootLayer root_layer_;
float scale_factor_ = 1;
bool has_committed_ = false;
private:
DISALLOW_COPY_AND_ASSIGN(CALayerTree);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_CA_LAYER_TREE_MAC_H_
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