cc/resources/display_list_raster_source.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_RESOURCES_DISPLAY_LIST_RASTER_SOURCE_H_
   6 #define CC_RESOURCES_DISPLAY_LIST_RASTER_SOURCE_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "cc/base/cc_export.h"
  12 #include "cc/debug/rendering_stats_instrumentation.h"
  13 #include "cc/resources/display_list_recording_source.h"
  14 #include "cc/resources/raster_source.h"
  15 #include "skia/ext/analysis_canvas.h"
  16 #include "skia/ext/refptr.h"
  17 #include "third_party/skia/include/core/SkPicture.h"
  18
  19 namespace cc {
  20 class DisplayItemList;
  21
  22 class CC_EXPORT DisplayListRasterSource : public RasterSource {
  23  public:
  24   static scoped_refptr<DisplayListRasterSource>
  25   CreateFromDisplayListRecordingSource(const DisplayListRecordingSource* other,
  26                                        bool can_use_lcd_text);
  27
  28   // RasterSource overrides.
  29   void PlaybackToCanvas(SkCanvas* canvas,
  30                         const gfx::Rect& canvas_rect,
  31                         float contents_scale) const override;
  32   void PlaybackToSharedCanvas(SkCanvas* canvas,
  33                               const gfx::Rect& canvas_rect,
  34                               float contents_scale) const override;
  35   void PerformSolidColorAnalysis(
  36       const gfx::Rect& content_rect,
  37       float contents_scale,
  38       RasterSource::SolidColorAnalysis* analysis) const override;
  39   bool IsSolidColor() const override;
  40   SkColor GetSolidColor() const override;
  41   gfx::Size GetSize() const override;
  42   void GatherPixelRefs(const gfx::Rect& content_rect,
  43                        float contents_scale,
  44                        std::vector<SkPixelRef*>* pixel_refs) const override;
  45   bool CoversRect(const gfx::Rect& content_rect,
  46                   float contents_scale) const override;
  47   bool HasRecordings() const override;
  48   void SetShouldAttemptToUseDistanceFieldText() override;
  49   bool ShouldAttemptToUseDistanceFieldText() const override;
  50   void DidBeginTracing() override;
  51   void AsValueInto(base::trace_event::TracedValue* array) const override;
  52   skia::RefPtr<SkPicture> GetFlattenedPicture() override;
  53   size_t GetPictureMemoryUsage() const override;
  54   bool CanUseLCDText() const override;
  55   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const override;
  56
  57  protected:
  58   DisplayListRasterSource();
  59   DisplayListRasterSource(const DisplayListRecordingSource* other,
  60                           bool can_use_lcd_text);
  61   DisplayListRasterSource(const DisplayListRasterSource* other,
  62                           bool can_use_lcd_text);
  63   ~DisplayListRasterSource() override;
  64
  65   // These members are const as this raster source may be in use on another
  66   // thread and so should not be touched after construction.
  67   const scoped_refptr<DisplayItemList> display_list_;
  68   const SkColor background_color_;
  69   const bool requires_clear_;
  70   const bool can_use_lcd_text_;
  71   const bool is_solid_color_;
  72   const SkColor solid_color_;
  73   const gfx::Rect recorded_viewport_;
  74   const gfx::Size size_;
  75   const bool clear_canvas_with_debug_color_;
  76   const int slow_down_raster_scale_factor_for_debug_;
  77   // TODO(enne/vmiura): this has a read/write race between raster and compositor
  78   // threads with multi-threaded Ganesh.  Make this const or remove it.
  79   bool should_attempt_to_use_distance_field_text_;
  80
  81  private:
  82   // Called when analyzing a tile. We can use AnalysisCanvas as
  83   // SkDrawPictureCallback, which allows us to early out from analysis.
  84   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
  85                          const gfx::Rect& canvas_rect,
  86                          float contents_scale) const;
  87
  88   void RasterCommon(SkCanvas* canvas,
  89                     SkDrawPictureCallback* callback,
  90                     const gfx::Rect& canvas_rect,
  91                     float contents_scale) const;
  92
  93   DISALLOW_COPY_AND_ASSIGN(DisplayListRasterSource);
  94 };
  95
  96 }  // namespace cc
  97
  98 #endif  // CC_RESOURCES_DISPLAY_LIST_RASTER_SOURCE_H_