Part 8 of cc/ directory shuffles: resources

cc/layer_updater.h

-// Copyright 2011 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_LAYER_UPDATER_H_
-#define CC_LAYER_UPDATER_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/vector2d.h"
-
-namespace cc {
-
-class PrioritizedResource;
-class PrioritizedResourceManager;
-class ResourceUpdateQueue;
-class TextureManager;
-struct RenderingStats;
-
-class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
- public:
-  // Allows updaters to store per-resource update properties.
-  class CC_EXPORT Resource {
-   public:
-    virtual ~Resource();
-
-    PrioritizedResource* texture() { return texture_.get(); }
-    // TODO(reveman): partial_update should be a property of this class
-    // instead of an argument passed to Update().
-    virtual void Update(ResourceUpdateQueue* queue,
-                        gfx::Rect source_rect,
-                        gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) = 0;
-   protected:
-    explicit Resource(scoped_ptr<PrioritizedResource> texture);
-
-   private:
-    scoped_ptr<PrioritizedResource> texture_;
-
-    DISALLOW_COPY_AND_ASSIGN(Resource);
-  };
-
-  LayerUpdater() {}
-
-  virtual scoped_ptr<Resource> CreateResource(
-      PrioritizedResourceManager* manager) = 0;
-  // The |resulting_opaque_rect| gives back a region of the layer that was
-  // painted opaque. If the layer is marked opaque in the updater, then this
-  // region should be ignored in preference for the entire layer's area.
-  virtual void PrepareToUpdate(gfx::Rect content_rect,
-                               gfx::Size tile_size,
-                               float contents_width_scale,
-                               float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) {}
-
-  // Set true by the layer when it is known that the entire output is going to
-  // be opaque.
-  virtual void SetOpaque(bool opaque) {}
-
- protected:
-  virtual ~LayerUpdater() {}
-
- private:
-  friend class base::RefCounted<LayerUpdater>;
-
-  DISALLOW_COPY_AND_ASSIGN(LayerUpdater);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYER_UPDATER_H_