commit 367c5684f4d417e5176bec12d67f4e2e42738fe0
author Robert Carr <racarr@google.com> Mon Jun 20 11:55:28 2016 -0700
committer Robert Carr <racarr@google.com> Tue Jun 21 16:28:41 2016 -0700
tree 5b03d59c7f94e34c25ebabc331f2f427a1dd42c6
parent 99e27f0bc236e38d88ff4f9912ede514a729b8eb

SurfaceControl: Add getTransformToDisplayInverse

For seamless rotation, the window manager needs
access to this flag, as it will apply the inverse
display transform itself to all other windows.

Bug: 28823590
Change-Id: Ifeee1078a9cb4cd01c8052570c137c6228b2f13d

libs/gui/ISurfaceComposerClient.cpp

diff --git a/libs/gui/ISurfaceComposerClient.cpp b/libs/gui/ISurfaceComposerClient.cpp
index 2ecb908..dd5b169 100644
--- a/libs/gui/ISurfaceComposerClient.cpp
+++ b/libs/gui/ISurfaceComposerClient.cpp
@@ -41,7 +41,8 @@
     CREATE_SURFACE = IBinder::FIRST_CALL_TRANSACTION,
     DESTROY_SURFACE,
     CLEAR_LAYER_FRAME_STATS,
-    GET_LAYER_FRAME_STATS
+    GET_LAYER_FRAME_STATS,
+    GET_TRANSFORM_TO_DISPLAY_INVERSE
 };
 
 class BpSurfaceComposerClient : public BpInterface<ISurfaceComposerClient>
@@ -94,6 +95,35 @@
         reply.read(*outStats);
         return reply.readInt32();
     }
+
+    virtual status_t getTransformToDisplayInverse(const sp<IBinder>& handle,
+            bool* outTransformToDisplayInverse) const {
+        Parcel data, reply;
+        status_t result =
+                data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor());
+        if (result != NO_ERROR) {
+            return result;
+        }
+        result = data.writeStrongBinder(handle);
+        if (result != NO_ERROR) {
+            return result;
+        }
+        result = remote()->transact(GET_TRANSFORM_TO_DISPLAY_INVERSE, data, &reply);
+        if (result != NO_ERROR) {
+            return result;
+        }
+        int transformInverse;
+        result = reply.readInt32(&transformInverse);
+        if (result != NO_ERROR) {
+            return result;
+        }
+        *outTransformToDisplayInverse = transformInverse != 0 ? true : false;
+        status_t result2 = reply.readInt32(&result);
+        if (result2 != NO_ERROR) {
+            return result2;
+        }
+        return result;
+    }
 };
 
 // Out-of-line virtual method definition to trigger vtable emission in this
@@ -145,6 +175,25 @@
             reply->writeInt32(result);
             return NO_ERROR;
         }
+        case GET_TRANSFORM_TO_DISPLAY_INVERSE: {
+            CHECK_INTERFACE(ISurfaceComposerClient, data, reply);
+            sp<IBinder> handle;
+            status_t result = data.readStrongBinder(&handle);
+            if (result != NO_ERROR) {
+                return result;
+            }
+            bool transformInverse = false;
+            result = getTransformToDisplayInverse(handle, &transformInverse);
+            if (result != NO_ERROR) {
+                return result;
+            }
+            result = reply->writeInt32(transformInverse ? 1 : 0);
+            if (result != NO_ERROR) {
+                return result;
+            }
+            result = reply->writeInt32(NO_ERROR);
+            return result;
+        }
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }

libs/gui/SurfaceComposerClient.cpp

diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 1620eb2..26b2209 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -612,6 +612,14 @@
     return mClient->getLayerFrameStats(token, outStats);
 }
 
+status_t SurfaceComposerClient::getTransformToDisplayInverse(const sp<IBinder>& token,
+        bool* outTransformToDisplayInverse) const {
+    if (mStatus != NO_ERROR) {
+        return mStatus;
+    }
+    return mClient->getTransformToDisplayInverse(token, outTransformToDisplayInverse);
+}
+
 inline Composer& SurfaceComposerClient::getComposer() {
     return mComposer;
 }

libs/gui/SurfaceControl.cpp

diff --git a/libs/gui/SurfaceControl.cpp b/libs/gui/SurfaceControl.cpp
index 223e1f4..33c1d90 100644
--- a/libs/gui/SurfaceControl.cpp
+++ b/libs/gui/SurfaceControl.cpp
@@ -190,6 +190,13 @@
     return client->getLayerFrameStats(mHandle, outStats);
 }
 
+status_t SurfaceControl::getTransformToDisplayInverse(bool* outTransformToDisplayInverse) const {
+    status_t err = validate();
+    if (err < 0) return err;
+    const sp<SurfaceComposerClient>& client(mClient);
+    return client->getTransformToDisplayInverse(mHandle, outTransformToDisplayInverse);
+}
+
 status_t SurfaceControl::validate() const
 {
     if (mHandle==0 || mClient==0) {