Add support for shared texture and external BeginFrame in OSR mode (issue #1006)

- Add CefWindowInfo::shared_texture_enabled and
  CefRenderHandler::OnAcceleratedPaint for shared texture support. Currently
  only supported on Windows (D3D11).
- Add CefWindowInfo::external_begin_frame_enabled and
  CefBrowserHost::SendExternalBeginFrame for external begin frame support.

include/capi/cef_browser_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=ff3ebc51ed5743aabac0be94caf2edeedbd413b7$
+// $hash=caba7ed3d6e19f7a4499fb48f627c2f5b40e46bc$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_BROWSER_CAPI_H_
@@ -571,6 +571,13 @@ typedef struct _cef_browser_host_t {
   void(CEF_CALLBACK* invalidate)(struct _cef_browser_host_t* self,
                                  cef_paint_element_type_t type);
 
+  ///
+  // Issue a BeginFrame request to Chromium.  Only valid when
+  // cef_window_tInfo::external_begin_frame_enabled is set to true (1).
+  ///
+  void(CEF_CALLBACK* send_external_begin_frame)(
+      struct _cef_browser_host_t* self);
+
   ///
   // Send a key event to the browser.
   ///

include/capi/cef_render_handler_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=d259309846e69d866a834aa701bbf8c9562dd117$
+// $hash=ef8abd4a01fe1047abc0d2ab1c359704611a60ac$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_RENDER_HANDLER_CAPI_H_
@@ -142,6 +142,18 @@ typedef struct _cef_render_handler_t {
                                int width,
                                int height);
 
+  ///
+  // Called when an view has been rendered to the given shared texture handle.
+  // Currently, the shared handle represents a D3D11 Texture2D that can be
+  // accessed with the OpenSharedResource function available from a ID3D11Device
+  ///
+  void(CEF_CALLBACK* on_accelerated_paint)(struct _cef_render_handler_t* self,
+                                           struct _cef_browser_t* browser,
+                                           cef_paint_element_type_t type,
+                                           size_t dirtyRectsCount,
+                                           cef_rect_t const* dirtyRects,
+                                           void* shared_handle);
+
   ///
   // Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
   // |custom_cursor_info| will be populated with the custom cursor information.

include/cef_browser.h

@@ -595,6 +595,13 @@ class CefBrowserHost : public virtual CefBaseRefCounted {
   /*--cef()--*/
   virtual void Invalidate(PaintElementType type) = 0;
 
+  ///
+  // Issue a BeginFrame request to Chromium.  Only valid when
+  // CefWindowInfo::external_begin_frame_enabled is set to true.
+  ///
+  /*--cef()--*/
+  virtual void SendExternalBeginFrame() = 0;
+
   ///
   // Send a key event to the browser.
   ///

include/cef_render_handler.h

@@ -135,7 +135,8 @@ class CefRenderHandler : public virtual CefBaseRefCounted {
   // contains the pixel data for the whole image. |dirtyRects| contains the set
   // of rectangles in pixel coordinates that need to be repainted. |buffer| will
   // be |width|*|height|*4 bytes in size and represents a BGRA image with an
-  // upper-left origin.
+  // upper-left origin. This method is only called when
+  // CefWindowInfo::shared_texture_enabled is set to false.
   ///
   /*--cef()--*/
   virtual void OnPaint(CefRefPtr<CefBrowser> browser,
@@ -145,6 +146,21 @@ class CefRenderHandler : public virtual CefBaseRefCounted {
                        int width,
                        int height) = 0;
 
+  ///
+  // Called when an element has been rendered to the shared texture handle.
+  // |type| indicates whether the element is the view or the popup widget.
+  // |dirtyRects| contains the set of rectangles in pixel coordinates that need
+  // to be repainted. |shared_handle| is the handle for a D3D11 Texture2D that
+  // can be accessed via ID3D11Device using the OpenSharedResource method. This
+  // method is only called when CefWindowInfo::shared_texture_enabled is set to
+  // true, and is currently only supported on Windows.
+  ///
+  /*--cef()--*/
+  virtual void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
+                                  PaintElementType type,
+                                  const RectList& dirtyRects,
+                                  void* shared_handle) {}
+
   ///
   // Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
   // |custom_cursor_info| will be populated with the custom cursor information.

include/internal/cef_linux.h

@@ -82,6 +82,8 @@ struct CefWindowInfoTraits {
     target->height = src->height;
     target->parent_window = src->parent_window;
     target->windowless_rendering_enabled = src->windowless_rendering_enabled;
+    target->shared_texture_enabled = src->shared_texture_enabled;
+    target->external_begin_frame_enabled = src->external_begin_frame_enabled;
     target->window = src->window;
   }
 };

include/internal/cef_mac.h

@@ -88,6 +88,8 @@ struct CefWindowInfoTraits {
     target->hidden = src->hidden;
     target->parent_view = src->parent_view;
     target->windowless_rendering_enabled = src->windowless_rendering_enabled;
+    target->shared_texture_enabled = src->shared_texture_enabled;
+    target->external_begin_frame_enabled = src->external_begin_frame_enabled;
     target->view = src->view;
   }
 };

include/internal/cef_types_linux.h

@@ -96,6 +96,19 @@ typedef struct _cef_window_info_t {
   ///
   int windowless_rendering_enabled;
 
+  ///
+  // Set to true (1) to enable shared textures for windowless rendering. Only
+  // valid if windowless_rendering_enabled above is also set to true. Currently
+  // only supported on Windows (D3D11).
+  ///
+  int shared_texture_enabled;
+
+  ///
+  // Set to true (1) to enable the ability to issue BeginFrame requests from the
+  // client application by calling CefBrowserHost::SendExternalBeginFrame.
+  ///
+  int external_begin_frame_enabled;
+
   ///
   // Pointer for the new browser window. Only used with windowed rendering.
   ///

include/internal/cef_types_mac.h

@@ -106,6 +106,19 @@ typedef struct _cef_window_info_t {
   ///
   int windowless_rendering_enabled;
 
+  ///
+  // Set to true (1) to enable shared textures for windowless rendering. Only
+  // valid if windowless_rendering_enabled above is also set to true. Currently
+  // only supported on Windows (D3D11).
+  ///
+  int shared_texture_enabled;
+
+  ///
+  // Set to true (1) to enable the ability to issue BeginFrame from the client
+  // application.
+  ///
+  int external_begin_frame_enabled;
+
   ///
   // NSView pointer for the new browser view. Only used with windowed rendering.
   ///

include/internal/cef_types_win.h

@@ -84,6 +84,19 @@ typedef struct _cef_window_info_t {
   ///
   int windowless_rendering_enabled;
 
+  ///
+  // Set to true (1) to enable shared textures for windowless rendering. Only
+  // valid if windowless_rendering_enabled above is also set to true. Currently
+  // only supported on Windows (D3D11).
+  ///
+  int shared_texture_enabled;
+
+  ///
+  // Set to true (1) to enable the ability to issue BeginFrame requests from the
+  // client application by calling CefBrowserHost::SendExternalBeginFrame.
+  ///
+  int external_begin_frame_enabled;
+
   ///
   // Handle for the new browser window. Only used with windowed rendering.
   ///

include/internal/cef_win.h

@@ -88,6 +88,8 @@ struct CefWindowInfoTraits {
     target->parent_window = src->parent_window;
     target->menu = src->menu;
     target->windowless_rendering_enabled = src->windowless_rendering_enabled;
+    target->shared_texture_enabled = src->shared_texture_enabled;
+    target->external_begin_frame_enabled = src->external_begin_frame_enabled;
     target->window = src->window;
   }
 };