Have VirtualDisplays send SF resize messages when resizing

Change-Id: I76d15b22099a659450ec875836c9bf2b6584838f

include/gui/SurfaceComposerClient.h

@@ -146,6 +146,7 @@ public:
             const sp<IGraphicBufferProducer>& bufferProducer);
     static void setDisplayLayerStack(const sp<IBinder>& token,
             uint32_t layerStack);
+    static void setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height);
 
     /* setDisplayProjection() defines the projection of layer stacks
      * to a given display.

include/private/gui/LayerState.h

@@ -113,7 +113,8 @@ struct DisplayState {
     enum {
         eSurfaceChanged             = 0x01,
         eLayerStackChanged          = 0x02,
-        eDisplayProjectionChanged   = 0x04
+        eDisplayProjectionChanged   = 0x04,
+        eDisplaySizeChanged         = 0x08
     };
 
     uint32_t what;
@@ -123,6 +124,7 @@ struct DisplayState {
     uint32_t orientation;
     Rect viewport;
     Rect frame;
+    uint32_t width, height;
     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
 };

libs/gui/SurfaceComposerClient.cpp

@@ -166,6 +166,7 @@ public:
             uint32_t orientation,
             const Rect& layerStackRect,
             const Rect& displayRect);
+    void setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height);
 
     static void setAnimationTransaction() {
         Composer::getInstance().setAnimationTransactionImpl();
@@ -426,6 +427,14 @@ void Composer::setDisplayProjection(const sp<IBinder>& token,
     mForceSynchronous = true; // TODO: do we actually still need this?
 }
 
+void Composer::setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height) {
+    Mutex::Autolock _l(mLock);
+    DisplayState& s(getDisplayStateLocked(token));
+    s.width = width;
+    s.height = height;
+    s.what |= DisplayState::eDisplaySizeChanged;
+}
+
 // ---------------------------------------------------------------------------
 
 SurfaceComposerClient::SurfaceComposerClient()
@@ -621,6 +630,11 @@ void SurfaceComposerClient::setDisplayProjection(const sp<IBinder>& token,
             layerStackRect, displayRect);
 }
 
+void SurfaceComposerClient::setDisplaySize(const sp<IBinder>& token,
+        uint32_t width, uint32_t height) {
+    Composer::getInstance().setDisplaySize(token, width, height);
+}
+
 // ----------------------------------------------------------------------------
 
 status_t SurfaceComposerClient::getDisplayConfigs(

services/surfaceflinger/SurfaceFlinger.h

@@ -170,6 +170,7 @@ private:
         Rect viewport;
         Rect frame;
         uint8_t orientation;
+        uint32_t width, height;
         String8 displayName;
         bool isSecure;
     };