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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.
#include <IOSurface/IOSurface.h>
#include <QuartzCore/QuartzCore.h>
#include <deque>
#include <memory>
#include <vector>
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/scoped_nsobject.h"
#include "base/memory/ref_counted.h"
#include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/mac/io_surface.h"
#include "ui/gfx/transform.h"
@class AVSampleBufferDisplayLayer;
namespace ui {
struct CARendererLayerParams;
// The CARendererLayerTree will construct a hierarchy of CALayers from a linear
// list provided by the CoreAnimation renderer using the algorithm and structure
// referenced described in
CARendererLayerTree(bool allow_av_sample_buffer_display_layer,
bool allow_solid_color_layers);
// This will remove all CALayers from this tree from their superlayer.
// 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(const CARendererLayerParams& params);
// 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,
std::unique_ptr<CARendererLayerTree> old_tree,
float scale_factor);
// Check to see if the CALayer tree can be represented entirely by a video
// layer on a black background. If so, then set |fullscreen_low_power_layer|
// to draw this content and return true. Otherwise return false. This is to
// be called after committing scheduled CALayers.
bool CommitFullscreenLowPowerLayer(
AVSampleBufferDisplayLayer* fullscreen_low_power_layer);
// Returns the contents used for a given solid color.
id ContentsForSolidColorForTesting(unsigned int color);
class SolidColorContents;
struct RootLayer;
struct ClipAndSortingLayer;
struct TransformLayer;
struct ContentLayer;
friend struct ContentLayer;
struct RootLayer {
// This will remove |ca_layer| from its superlayer, if |ca_layer| is
// non-nil.
// Append a new content layer, without modifying the actual CALayer
// structure.
bool AddContentLayer(CARendererLayerTree* tree,
const CARendererLayerParams& params);
// 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;
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.
void AddContentLayer(CARendererLayerTree* tree,
const CARendererLayerParams& params);
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;
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.
void AddContentLayer(CARendererLayerTree* tree,
const CARendererLayerParams& params);
void CommitToCA(CALayer* superlayer,
TransformLayer* old_layer,
float scale_factor);
gfx::Transform transform;
std::vector<ContentLayer> content_layers;
base::scoped_nsobject<CALayer> ca_layer;
struct ContentLayer {
ContentLayer(CARendererLayerTree* tree,
base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer,
const gfx::RectF& contents_rect,
const gfx::Rect& rect,
unsigned background_color,
unsigned edge_aa_mask,
float opacity,
unsigned filter);
ContentLayer(ContentLayer&& layer);
// See the behavior of RootLayer for the effects of these functions on the
// |ca_layer| member and |old_layer| argument.
void CommitToCA(CALayer* parent,
ContentLayer* old_layer,
float scale_factor);
// Ensure that the IOSurface be marked as in-use as soon as it is received.
// When they are committed to the window server, that will also increment
// their use count.
const gfx::ScopedInUseIOSurface io_surface;
const base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer;
scoped_refptr<SolidColorContents> solid_color_contents;
gfx::RectF contents_rect;
gfx::Rect rect;
unsigned background_color = 0;
// Note that the CoreAnimation edge antialiasing mask is not the same as
// the edge antialiasing mask passed to the constructor.
CAEdgeAntialiasingMask ca_edge_aa_mask = 0;
float opacity = 1;
NSString* const ca_filter = nil;
base::scoped_nsobject<CALayer> ca_layer;
// If this layer's contents can be represented as an
// AVSampleBufferDisplayLayer, then |ca_layer| will point to |av_layer|.
base::scoped_nsobject<AVSampleBufferDisplayLayer> av_layer;
bool use_av_layer = false;
RootLayer root_layer_;
float scale_factor_ = 1;
bool has_committed_ = false;
const bool allow_av_sample_buffer_display_layer_ = true;
const bool allow_solid_color_layers_ = true;
} // namespace ui