MacViews: Move content::AcceleratedWidget to new component, ui/accelerated_widget_mac

content/browser/compositor/io_surface_texture_mac.h

-// Copyright (c) 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.
-
-#ifndef CONTENT_BROWSER_COMPOSITOR_IO_SURFACE_TEXTURE_MAC_H_
-#define CONTENT_BROWSER_COMPOSITOR_IO_SURFACE_TEXTURE_MAC_H_
-
-#include <deque>
-#include <list>
-#include <vector>
-
-#import <Cocoa/Cocoa.h>
-#include <IOSurface/IOSurfaceAPI.h>
-#include <QuartzCore/QuartzCore.h>
-
-#include "base/callback.h"
-#include "base/lazy_instance.h"
-#include "base/mac/scoped_cftyperef.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "media/base/video_frame.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/rect_conversions.h"
-#include "ui/gfx/size.h"
-
-class SkBitmap;
-
-namespace gfx {
-class Rect;
-}
-
-namespace content {
-
-class IOSurfaceContext;
-class RenderWidgetHostViewFrameSubscriber;
-class RenderWidgetHostViewMac;
-
-// This class manages an OpenGL context and IOSurfaceTexture for the accelerated
-// compositing code path. The GL context is attached to
-// RenderWidgetHostViewCocoa for blitting the IOSurfaceTexture.
-class IOSurfaceTexture
-    : public base::RefCounted<IOSurfaceTexture> {
- public:
-  // Returns NULL if IOSurfaceTexture or GL API calls fail.
-  static scoped_refptr<IOSurfaceTexture> Create();
-
-  // Set IOSurfaceTexture that will be drawn on the next NSView drawRect.
-  bool SetIOSurface(
-      IOSurfaceID io_surface_id,
-      const gfx::Size& pixel_size) WARN_UNUSED_RESULT;
-
-  // Blit the IOSurface to the rectangle specified by |window_rect| in DIPs,
-  // with the origin in the lower left corner. If the window rect's size is
-  // larger than the IOSurface, the remaining right and bottom edges will be
-  // white. |window_scale_factor| is 1 in normal views, 2 in HiDPI views.
-  bool DrawIOSurface() WARN_UNUSED_RESULT;
-
-  // Returns true if the offscreen context used by this surface has been
-  // poisoned.
-  bool HasBeenPoisoned() const;
-
- private:
-  friend class base::RefCounted<IOSurfaceTexture>;
-
-  IOSurfaceTexture(
-      const scoped_refptr<IOSurfaceContext>& context);
-  ~IOSurfaceTexture();
-
-  // Unref the IOSurfaceTexture and delete the associated GL texture. If the GPU
-  // process is no longer referencing it, this will delete the IOSurface.
-  void ReleaseIOSurfaceAndTexture();
-
-  // Check for GL errors and store the result in error_. Only return new
-  // errors
-  GLenum GetAndSaveGLError();
-
-  // Offscreen context used for all operations other than drawing to the
-  // screen. This is in the same share group as the contexts used for
-  // drawing, and is the same for all IOSurfaces in all windows.
-  scoped_refptr<IOSurfaceContext> offscreen_context_;
-
-  // The IOSurface and its non-rounded size.
-  base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
-  gfx::Size pixel_size_;
-
-  // The "live" OpenGL texture referring to this IOSurfaceRef. Note
-  // that per the CGLTexImageIOSurface2D API we do not need to
-  // explicitly update this texture's contents once created. All we
-  // need to do is ensure it is re-bound before attempting to draw
-  // with it.
-  GLuint texture_;
-
-  // Error saved by GetAndSaveGLError
-  GLint gl_error_;
-
-  // Aggressive IOSurface eviction logic. When using CoreAnimation, IOSurfaces
-  // are used only transiently to transfer from the GPU process to the browser
-  // process. Once the IOSurface has been drawn to its CALayer, the CALayer
-  // will not need updating again until its view is hidden and re-shown.
-  // Aggressively evict surfaces when more than 8 (the number allowed by the
-  // memory manager for fast tab switching) are allocated.
-  enum {
-    kMaximumUnevictedSurfaces = 8,
-  };
-  typedef std::list<IOSurfaceTexture*> EvictionQueue;
-  void EvictionMarkUpdated();
-  void EvictionMarkEvicted();
-  EvictionQueue::iterator eviction_queue_iterator_;
-  bool eviction_has_been_drawn_since_updated_;
-
-  static void EvictionScheduleDoEvict();
-  static void EvictionDoEvict();
-  static base::LazyInstance<EvictionQueue> eviction_queue_;
-  static bool eviction_scheduled_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_COMPOSITOR_IO_SURFACE_TEXTURE_MAC_H_