cc: Remove the base RasterSource

cc/playback/raster_source.h

-// 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.
-
-#ifndef CC_PLAYBACK_RASTER_SOURCE_H_
-#define CC_PLAYBACK_RASTER_SOURCE_H_
-
-#include <vector>
-
-#include "base/memory/ref_counted.h"
-#include "cc/base/cc_export.h"
-#include "cc/debug/traced_value.h"
-#include "cc/playback/discardable_image_map.h"
-#include "skia/ext/refptr.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-
-class SkCanvas;
-class SkPicture;
-
-namespace cc {
-
-class CC_EXPORT RasterSource : public base::RefCountedThreadSafe<RasterSource> {
- public:
-  struct CC_EXPORT SolidColorAnalysis {
-    SolidColorAnalysis()
-        : is_solid_color(false), solid_color(SK_ColorTRANSPARENT) {}
-    ~SolidColorAnalysis() {}
-
-    bool is_solid_color;
-    SkColor solid_color;
-  };
-
-  // Raster a subrect of this RasterSource into the given canvas. It is
-  // assumed that contents_scale has already been applied to this canvas.
-  // Writes the total number of pixels rasterized and the time spent
-  // rasterizing to the stats if the respective pointer is not nullptr.
-  // It is assumed that the canvas passed here will only be rasterized by
-  // this raster source via this call.
-  virtual void PlaybackToCanvas(SkCanvas* canvas,
-                                const gfx::Rect& canvas_bitmap_rect,
-                                const gfx::Rect& canvas_playback_rect,
-                                float contents_scale) const = 0;
-
-  // Similar to above, except that the canvas passed here can (or was already)
-  // rasterized into by another raster source. That is, it is not safe to clear
-  // the canvas or discard its underlying memory.
-  virtual void PlaybackToSharedCanvas(SkCanvas* canvas,
-                                      const gfx::Rect& canvas_rect,
-                                      float contents_scale) const = 0;
-
-  // Analyze to determine if the given rect at given scale is of solid color in
-  // this raster source.
-  virtual void PerformSolidColorAnalysis(
-      const gfx::Rect& content_rect,
-      float contents_scale,
-      SolidColorAnalysis* analysis) const = 0;
-
-  // Returns true iff the whole raster source is of solid color.
-  virtual bool IsSolidColor() const = 0;
-
-  // Returns the color of the raster source if it is solid color. The results
-  // are unspecified if IsSolidColor returns false.
-  virtual SkColor GetSolidColor() const = 0;
-
-  // Returns the size of this raster source.
-  virtual gfx::Size GetSize() const = 0;
-
-  // Populate the given list with all images that may overlap the given
-  // rect in layer space.
-  virtual void GetDiscardableImagesInRect(
-      const gfx::Rect& layer_rect,
-      std::vector<DrawImage>* images) const = 0;
-
-  // Return true iff this raster source can raster the given rect in layer
-  // space.
-  virtual bool CoversRect(const gfx::Rect& layer_rect) const = 0;
-
-  // Returns true if this raster source has anything to rasterize.
-  virtual bool HasRecordings() const = 0;
-
-  // Valid rectangle in which everything is recorded and can be rastered from.
-  virtual gfx::Rect RecordedViewport() const = 0;
-
-  // Informs the raster source that it should attempt to use distance field text
-  // during rasterization.
-  virtual void SetShouldAttemptToUseDistanceFieldText() = 0;
-
-  // Return true iff this raster source would benefit from using distance
-  // field text.
-  virtual bool ShouldAttemptToUseDistanceFieldText() const = 0;
-
-  // Tracing functionality.
-  virtual void DidBeginTracing() = 0;
-  virtual void AsValueInto(base::trace_event::TracedValue* array) const = 0;
-  virtual skia::RefPtr<SkPicture> GetFlattenedPicture() = 0;
-  virtual size_t GetPictureMemoryUsage() const = 0;
-
-  // Return true if LCD anti-aliasing may be used when rastering text.
-  virtual bool CanUseLCDText() const = 0;
-
-  virtual scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<RasterSource>;
-
-  RasterSource() {}
-  virtual ~RasterSource() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(RasterSource);
-};
-
-}  // namespace cc
-
-#endif  // CC_PLAYBACK_RASTER_SOURCE_H_