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// Copyright 2014 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 "base/gtest_prod_util.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/cc_export.h"
#include "cc/base/scoped_ptr_vector.h"
#include "cc/base/sidecar_list_container.h"
#include "cc/playback/display_item.h"
#include "cc/playback/pixel_ref_map.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "ui/gfx/geometry/rect.h"
class SkCanvas;
class SkPictureRecorder;
namespace cc {
class DisplayItemListSettings;
class CC_EXPORT DisplayItemList
: public base::RefCountedThreadSafe<DisplayItemList> {
static scoped_refptr<DisplayItemList> CreateWithoutCachedPicture(
const DisplayItemListSettings& settings);
// Creates a display item list with the given cull rect (if picture caching
// is used). The resulting display list will not support sidecar data.
static scoped_refptr<DisplayItemList> Create(gfx::Rect layer_rect,
bool use_cached_picture);
static scoped_refptr<DisplayItemList> Create(
gfx::Rect layer_rect,
const DisplayItemListSettings& settings);
void Raster(SkCanvas* canvas,
SkPicture::AbortCallback* callback,
const gfx::Rect& canvas_target_playback_rect,
float contents_scale) const;
// This is a fast path for use only if canvas_ is set and
// retain_individual_display_items_ is false. This method also updates
// is_suitable_for_gpu_rasterization_ and approximate_op_count_.
void RasterIntoCanvas(const DisplayItem& display_item);
template <typename DisplayItemType>
DisplayItemType* CreateAndAppendItem() {
needs_process_ = true;
return items_.AllocateAndConstruct<DisplayItemType>();
// Removes the last item. This cannot be called on lists with cached pictures
// (since the data may already have been incorporated into cached picture
// sizes, etc).
void RemoveLast();
// Called after all items are appended, to process the items and, if
// applicable, create an internally cached SkPicture.
void Finalize();
bool IsSuitableForGpuRasterization() const;
int ApproximateOpCount() const;
size_t ApproximateMemoryUsage() const;
bool ShouldBeAnalyzedForSolidColor() const;
bool RetainsIndividualDisplayItems() const;
scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue(
bool include_items) const;
void EmitTraceSnapshot() const;
void GatherPixelRefs(const gfx::Size& grid_cell_size);
// Finds the sidecar for a display item in this list.
void* GetSidecar(DisplayItem* display_item);
DisplayItemList(gfx::Rect layer_rect,
const DisplayItemListSettings& display_list_settings,
bool retain_individual_display_items);
DisplayItemList(gfx::Rect layer_rect,
const DisplayItemListSettings& display_list_settings);
// While appending new items, if they are not being retained, this can process
// periodically to avoid retaining all the items and processing at the end.
void ProcessAppendedItemsOnTheFly();
void ProcessAppendedItems();
bool ProcessAppendedItemsCalled() const { return !needs_process_; }
bool needs_process_;
bool ProcessAppendedItemsCalled() const { return true; }
SidecarListContainer<DisplayItem> items_;
skia::RefPtr<SkPicture> picture_;
scoped_ptr<SkPictureRecorder> recorder_;
skia::RefPtr<SkCanvas> canvas_;
bool use_cached_picture_;
bool retain_individual_display_items_;
gfx::Rect layer_rect_;
bool all_items_are_suitable_for_gpu_rasterization_;
int approximate_op_count_;
// Memory usage due to the cached SkPicture.
size_t picture_memory_usage_;
// Memory usage due to external data held by display items.
size_t external_memory_usage_;
scoped_ptr<PixelRefMap> pixel_refs_;
friend class base::RefCountedThreadSafe<DisplayItemList>;
friend class PixelRefMap::Iterator;
FRIEND_TEST_ALL_PREFIXES(DisplayItemListTest, ApproximateMemoryUsage);
} // namespace cc