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// Copyright 2012 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 <map>
#include <set>
#include <vector>
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/debug/rendering_stats_instrumentation.h"
#include "cc/playback/picture_pile.h"
#include "cc/playback/pixel_ref_map.h"
#include "cc/playback/raster_source.h"
#include "skia/ext/analysis_canvas.h"
#include "skia/ext/refptr.h"
class SkCanvas;
class SkPicture;
class SkPixelRef;
namespace gfx {
class Rect;
namespace cc {
class CC_EXPORT PicturePileImpl : public RasterSource {
static scoped_refptr<PicturePileImpl> CreateFromPicturePile(
const PicturePile* other,
bool can_use_lcd_text);
// RasterSource overrides. See RasterSource header for full description.
// When slow-down-raster-scale-factor is set to a value greater than 1, the
// reported rasterize time (in stats_instrumentation) is the minimum measured
// value over all runs.
void PlaybackToCanvas(SkCanvas* canvas,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float contents_scale) const override;
void PlaybackToSharedCanvas(SkCanvas* canvas,
const gfx::Rect& canvas_rect,
float contents_scale) const override;
void PerformSolidColorAnalysis(
const gfx::Rect& content_rect,
float contents_scale,
RasterSource::SolidColorAnalysis* analysis) const override;
void GatherPixelRefs(
const gfx::Rect& content_rect,
float contents_scale,
std::vector<skia::PositionPixelRef>* pixel_refs) const override;
bool CoversRect(const gfx::Rect& content_rect,
float contents_scale) const override;
void SetShouldAttemptToUseDistanceFieldText() override;
bool ShouldAttemptToUseDistanceFieldText() const override;
gfx::Size GetSize() const override;
bool IsSolidColor() const override;
SkColor GetSolidColor() const override;
bool HasRecordings() const override;
bool CanUseLCDText() const override;
scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const override;
// Tracing functionality.
void DidBeginTracing() override;
void AsValueInto(base::trace_event::TracedValue* array) const override;
skia::RefPtr<SkPicture> GetFlattenedPicture() override;
size_t GetPictureMemoryUsage() const override;
// Iterator used to return SkPixelRefs from this picture pile.
// Public for testing.
class CC_EXPORT PixelRefIterator {
PixelRefIterator(const gfx::Rect& content_rect,
float contents_scale,
const PicturePileImpl* picture_pile);
const skia::PositionPixelRef* operator->() const {
return &(*pixel_ref_iterator_);
const skia::PositionPixelRef& operator*() const {
return *pixel_ref_iterator_;
PixelRefIterator& operator++();
operator bool() const { return pixel_ref_iterator_; }
void AdvanceToTilePictureWithPixelRefs();
const PicturePileImpl* picture_pile_;
gfx::Rect layer_rect_;
TilingData::Iterator tile_iterator_;
PixelRefMap::Iterator pixel_ref_iterator_;
std::set<const void*> processed_pictures_;
friend class PicturePile;
friend class PixelRefIterator;
using PictureMapKey = PicturePile::PictureMapKey;
using PictureMap = PicturePile::PictureMap;
explicit PicturePileImpl(const PicturePile* other, bool can_use_lcd_text);
explicit PicturePileImpl(const PicturePileImpl* other, bool can_use_lcd_text);
~PicturePileImpl() override;
int buffer_pixels() const { return tiling_.border_texels(); }
// These members are const as this raster source may be in use on another
// thread and so should not be touched after construction.
const PictureMap picture_map_;
const TilingData tiling_;
const SkColor background_color_;
const bool requires_clear_;
const bool can_use_lcd_text_;
const bool is_solid_color_;
const SkColor solid_color_;
const gfx::Rect recorded_viewport_;
const bool has_any_recordings_;
const bool clear_canvas_with_debug_color_;
const float min_contents_scale_;
const int slow_down_raster_scale_factor_for_debug_;
// TODO(enne/vmiura): this has a read/write race between raster and compositor
// threads with multi-threaded Ganesh. Make this const or remove it.
bool should_attempt_to_use_distance_field_text_;
size_t picture_memory_usage_;
typedef std::map<const Picture*, Region> PictureRegionMap;
// Called when analyzing a tile. We can use AnalysisCanvas as
// SkPicture::AbortCallback, which allows us to early out from analysis.
void RasterForAnalysis(skia::AnalysisCanvas* canvas,
const gfx::Rect& canvas_rect,
float contents_scale) const;
void CoalesceRasters(const gfx::Rect& canvas_rect,
const gfx::Rect& content_rect,
float contents_scale,
PictureRegionMap* result) const;
void RasterCommon(SkCanvas* canvas,
SkPicture::AbortCallback* callback,
const gfx::Rect& canvas_rect,
float contents_scale) const;
// An internal CanRaster check that goes to the picture_map rather than
// using the recorded_viewport hint.
bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
gfx::Rect PaddedRect(const PictureMapKey& key) const;
} // namespace cc