Make cross-process CALayers work on Mac

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 
@@ skipping 26 matching lines @@
 #include "content/browser/renderer_host/compositing_iosurface_mac.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #import "content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h"
 #import "content/browser/renderer_host/render_widget_host_view_mac_editcommand_helper.h"
 #import "content/browser/renderer_host/software_layer_mac.h"
 #import "content/browser/renderer_host/text_input_client_mac.h"
 #include "content/common/accessibility_messages.h"
 #include "content/common/edit_command.h"
 #include "content/common/gpu/gpu_messages.h"
+#include "content/common/gpu/surface_handle_types_mac.h"
 #include "content/common/input_messages.h"
 #include "content/common/view_messages.h"
 #include "content/common/webplugin_geometry.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #import "content/public/browser/render_widget_host_view_mac_delegate.h"
 #include "content/public/browser/user_metrics.h"
@@ skipping 406 matching lines @@
       software_frame_weak_ptr_factory_.GetWeakPtr()));
   // |cocoa_view_| owns us and we will be deleted when |cocoa_view_|
   // goes away.  Since we autorelease it, our caller must put
   // |GetNativeView()| into the view hierarchy right after calling us.
   cocoa_view_ = [[[RenderWidgetHostViewCocoa alloc]
                   initWithRenderWidgetHostViewMac:this] autorelease];
 
   background_layer_.reset([[CALayer alloc] init]);
   [background_layer_
       setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
+  [background_layer_
+      setAutoresizingMask:kCALayerWidthSizable|kCALayerHeightSizable];
+  [background_layer_ setGeometryFlipped:YES];
+  [background_layer_ setContentsGravity:kCAGravityTopLeft];
   [cocoa_view_ setLayer:background_layer_];
   [cocoa_view_ setWantsLayer:YES];
 
   render_widget_host_->SetView(this);
 }
 
 RenderWidgetHostViewMac::~RenderWidgetHostViewMac() {
   // This is being called from |cocoa_view_|'s destructor, so invalidate the
   // pointer.
   cocoa_view_ = nil;
@@ skipping 1172 matching lines @@
   return true;
 }
 
 void RenderWidgetHostViewMac::AcceleratedSurfaceBuffersSwapped(
     const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
     int gpu_host_id) {
   TRACE_EVENT0("browser",
       "RenderWidgetHostViewMac::AcceleratedSurfaceBuffersSwapped");
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
-  IOSurfaceID io_surface_handle =
-      static_cast<IOSurfaceID>(params.surface_handle);
   AddPendingSwapAck(params.route_id,
                     gpu_host_id,
                     compositing_iosurface_ ?
                         compositing_iosurface_->GetRendererID() : 0);
-  CompositorSwapBuffers(io_surface_handle,
-                        params.size,
-                        params.scale_factor,
-                        params.latency_info);
+
+  switch (GetSurfaceHandleType(params.surface_handle)) {
+    case kSurfaceHandleTypeIOSurface: {
+      IOSurfaceID io_surface_id = IOSurfaceIDFromSurfaceHandle(
+          params.surface_handle);
+
+      CompositorSwapBuffers(io_surface_id,
+                            params.size,
+                            params.scale_factor,
+                            params.latency_info);
+    } break;
+    case kSurfaceHandleTypeCAContext: {
+      // Disable the fade-out animation as the layer is added.
+      ScopedCAActionDisabler disabler;
+
+      CAContextID context_id = CAContextIDFromSurfaceHandle(
+          params.surface_handle);
+
+      // If if the layer has changed put the new layer in the hierarchy and
+      // take the old one out.
+      if ([remote_layer_host_ contextId] != context_id) {
+        [remote_layer_host_ removeFromSuperlayer];
+
+        remote_layer_host_.reset([[CALayerHost alloc] init]);
+        [remote_layer_host_ setContextId:context_id];
+        [remote_layer_host_
+            setAutoresizingMask:kCALayerMaxXMargin|kCALayerMaxYMargin];
+        [background_layer_ addSublayer:remote_layer_host_];
+      }
+
+      // Ack the frame immediately. Any GPU back pressure will be applied by
+      // the remote layer from within the GPU process.
+      SendPendingSwapAck();
+    } break;
+    default:
+      LOG(ERROR) << "Invalid surface handle type.";
+      break;
+  }
 }
 
 void RenderWidgetHostViewMac::AcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
     int gpu_host_id) {
   TRACE_EVENT0("browser",
       "RenderWidgetHostViewMac::AcceleratedSurfacePostSubBuffer");
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
-  IOSurfaceID io_surface_handle =
-      static_cast<IOSurfaceID>(params.surface_handle);
   AddPendingSwapAck(params.route_id,
                     gpu_host_id,
                     compositing_iosurface_ ?
                         compositing_iosurface_->GetRendererID() : 0);
-  CompositorSwapBuffers(io_surface_handle,
+  CompositorSwapBuffers(IOSurfaceIDFromSurfaceHandle(params.surface_handle),
                         params.surface_size,
                         params.surface_scale_factor,
                         params.latency_info);
 }
 
 void RenderWidgetHostViewMac::AcceleratedSurfaceSuspend() {
   if (compositing_iosurface_)
     compositing_iosurface_->UnrefIOSurface();
 }
 
@@ skipping 496 matching lines @@
     }
   }
   if (compositing_iosurface_ &&
       compositing_iosurface_->HasIOSurface() &&
       compositing_iosurface_layer_) {
     CGRect layer_bounds = CGRectMake(
       0,
       0,
       compositing_iosurface_->dip_io_surface_size().width(),
       compositing_iosurface_->dip_io_surface_size().height());
-    CGPoint layer_position = CGPointMake(
-      0,
-      CGRectGetHeight(new_background_frame) - CGRectGetHeight(layer_bounds));
     bool bounds_changed = !CGRectEqualToRect(
         layer_bounds, [compositing_iosurface_layer_ bounds]);
-    [compositing_iosurface_layer_ setPosition:layer_position];
     [compositing_iosurface_layer_ setBounds:layer_bounds];
 
     // If the bounds changed, then draw the frame immediately, to ensure that
     // content displayed is in sync with the window size.
     if (bounds_changed) {
       // Also, sometimes, especially when infobars are being removed, the
       // setNeedsDisplay calls are dropped on the floor, and stale content is
       // displayed. Calling displayIfNeeded will ensure that the right size
       // frame is drawn to the screen.
       // http://crbug.com/350817
@@ skipping 1706 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end