First prototype atttempting to support an external display

both API and implementation will change, this is just a prototype
intended to show feasability.

SurfaceFlinger is passed an ISurfaceTexture through a new
callback, it is in turn used to create an EGLSurface which
surfaceflinger will draw into in addition to the main screen.

Change-Id: Id0bbb0b854bb7bae44d57246a90b65d4567f9a21

1 files changed, 13 insertions, 0 deletions

diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 8177e4d..bc550bf 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -207,6 +207,13 @@ public:
         data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
         remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
     }
+
+    virtual void connectDisplay(const sp<ISurfaceTexture> display) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+        data.writeStrongBinder(display->asBinder());
+        remote()->transact(BnSurfaceComposer::CONNECT_DISPLAY, data, &reply);
+    }
 };
 
 IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
@@ -301,6 +308,12 @@ status_t BnSurfaceComposer::onTransact(
             CHECK_INTERFACE(ISurfaceComposer, data, reply);
             unblank();
         } break;
+        case CONNECT_DISPLAY: {
+            CHECK_INTERFACE(ISurfaceComposer, data, reply);
+            sp<ISurfaceTexture> surfaceTexture =
+                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
+            connectDisplay(surfaceTexture);
+        } break;
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }