content/browser/compositor/reflector_impl.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 CONTENT_BROWSER_COMPOSITOR_REFLECTOR_IMPL_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_REFLECTOR_IMPL_H_
   7
   8 #include "base/id_map.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/synchronization/lock.h"
  12 #include "content/browser/compositor/image_transport_factory.h"
  13 #include "gpu/command_buffer/common/mailbox_holder.h"
  14 #include "ui/compositor/reflector.h"
  15 #include "ui/gfx/size.h"
  16
  17 namespace base { class MessageLoopProxy; }
  18
  19 namespace gfx { class Rect; }
  20
  21 namespace ui {
  22 class Compositor;
  23 class Layer;
  24 }
  25
  26 namespace content {
  27
  28 class OwnedMailbox;
  29 class BrowserCompositorOutputSurface;
  30
  31 // A reflector implementation that copies the framebuffer content
  32 // to the texture, then draw it onto the mirroring compositor.
  33 class ReflectorImpl : public base::SupportsWeakPtr<ReflectorImpl>,
  34                       public ui::Reflector {
  35  public:
  36   ReflectorImpl(
  37       ui::Compositor* mirrored_compositor,
  38       ui::Layer* mirroring_layer,
  39       IDMap<BrowserCompositorOutputSurface>* output_surface_map,
  40       base::MessageLoopProxy* compositor_thread_loop,
  41       int surface_id);
  42
  43   ui::Compositor* mirrored_compositor() {
  44     return GetMain().mirrored_compositor;
  45   }
  46
  47   void InitOnImplThread(const gpu::MailboxHolder& mailbox_holder);
  48   void Shutdown();
  49   void ShutdownOnImplThread();
  50
  51   // Post a task to attach the reflector to the output surface onto ImplThread.
  52   void ReattachToOutputSurfaceFromMainThread(
  53       BrowserCompositorOutputSurface* surface);
  54
  55   // ui::Reflector implementation.
  56   void OnMirroringCompositorResized() override;
  57
  58   // Called in |BrowserCompositorOutputSurface::SwapBuffers| to copy
  59   // the full screen image to the |texture_id_|. This must be called
  60   // on ImplThread.
  61   void OnSwapBuffers();
  62
  63   // Called in |BrowserCompositorOutputSurface::PostSubBuffer| copy
  64   // the sub image given by |rect| to the texture.This must be called
  65   // on ImplThread.
  66   void OnPostSubBuffer(gfx::Rect rect);
  67
  68   // Create a shared texture that will be used to copy the content of
  69   // mirrored compositor to the mirroring compositor.  This should
  70   // be posted to the main thread when the output is attached in
  71   // impl thread.
  72   void CreateSharedTextureOnMainThread(gfx::Size size);
  73
  74   // Called when the source surface is bound and available. This must
  75   // be called on ImplThread.
  76   void OnSourceSurfaceReady(BrowserCompositorOutputSurface* surface);
  77
  78   void DetachFromOutputSurface();
  79
  80  private:
  81   struct MainThreadData {
  82     MainThreadData(ui::Compositor* mirrored_compositor,
  83                    ui::Layer* mirroring_layer);
  84     ~MainThreadData();
  85     scoped_refptr<OwnedMailbox> mailbox;
  86     bool needs_set_mailbox;
  87     ui::Compositor* mirrored_compositor;
  88     ui::Layer* mirroring_layer;
  89   };
  90
  91   struct ImplThreadData {
  92     explicit ImplThreadData(
  93         IDMap<BrowserCompositorOutputSurface>* output_surface_map);
  94     ~ImplThreadData();
  95     IDMap<BrowserCompositorOutputSurface>* output_surface_map;
  96     BrowserCompositorOutputSurface* output_surface;
  97     scoped_ptr<GLHelper> gl_helper;
  98     unsigned texture_id;
  99     gpu::MailboxHolder mailbox_holder;
 100   };
 101
 102   ~ReflectorImpl() override;
 103
 104   void AttachToOutputSurfaceOnImplThread(
 105       const gpu::MailboxHolder& mailbox_holder,
 106       BrowserCompositorOutputSurface* surface);
 107
 108   void UpdateTextureSizeOnMainThread(gfx::Size size);
 109
 110   // Request full redraw on mirroring compositor.
 111   void FullRedrawOnMainThread(gfx::Size size);
 112
 113   void UpdateSubBufferOnMainThread(gfx::Size size, gfx::Rect rect);
 114
 115   // Request full redraw on mirrored compositor so that
 116   // the full content will be copied to mirroring compositor.
 117   void FullRedrawContentOnMainThread();
 118
 119   // This exists just to hold a reference to a ReflectorImpl in a post task,
 120   // so the ReflectorImpl gets deleted when the function returns.
 121   static void DeleteOnMainThread(scoped_refptr<ReflectorImpl> reflector) {}
 122
 123   MainThreadData& GetMain();
 124   ImplThreadData& GetImpl();
 125
 126   // Must be accessed only on ImplThread, through GetImpl().
 127   ImplThreadData impl_unsafe_;
 128
 129   // Must be accessed only on MainThread, through GetMain().
 130   MainThreadData main_unsafe_;
 131
 132   // Can be accessed on both.
 133   scoped_refptr<base::MessageLoopProxy> impl_message_loop_;
 134   scoped_refptr<base::MessageLoopProxy> main_message_loop_;
 135   int surface_id_;
 136 };
 137
 138 }  // namespace content
 139
 140 #endif  // CONTENT_BROWSER_COMPOSITOR_REFLECTOR_IMPL_H_