From a76b271f0e14325fa0ebb98e1cac0a15adfea1cb Mon Sep 17 00:00:00 2001
From: chaviw <chaviw@google.com>
Date: Wed, 20 Sep 2017 12:02:26 -0700
Subject: Add captureLayers function to capture a layer and its children.

The captureLayers function gets a root layer as its argument.
It will capture the content for that layer and its descendants. The
capture will set the root layer's transform back to (0, 0).

Test: Transaction_test ScreenCaptureTest
Change-Id: I84fb66a65cd91434cddc99506b1924cf9f950935
---
 libs/gui/ISurfaceComposer.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'libs/gui/ISurfaceComposer.cpp')

diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 96771257c1..973302c226 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -122,6 +122,18 @@ public:
         return reply.readInt32();
     }
 
+    virtual status_t captureLayers(const sp<IBinder>& layerHandleBinder,
+                                   const sp<IGraphicBufferProducer>& producer,
+                                   ISurfaceComposer::Rotation rotation) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+        data.writeStrongBinder(layerHandleBinder);
+        data.writeStrongBinder(IInterface::asBinder(producer));
+        data.writeInt32(static_cast<int32_t>(rotation));
+        remote()->transact(BnSurfaceComposer::CAPTURE_LAYERS, data, &reply);
+        return reply.readInt32();
+    }
+
     virtual bool authenticateSurfaceTexture(
             const sp<IGraphicBufferProducer>& bufferProducer) const
     {
@@ -588,6 +600,18 @@ status_t BnSurfaceComposer::onTransact(
             reply->writeInt32(res);
             return NO_ERROR;
         }
+        case CAPTURE_LAYERS: {
+            CHECK_INTERFACE(ISurfaceComposer, data, reply);
+            sp<IBinder> layerHandleBinder = data.readStrongBinder();
+            sp<IGraphicBufferProducer> producer =
+                    interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
+            int32_t rotation = data.readInt32();
+
+            status_t res = captureLayers(layerHandleBinder, producer,
+                                         static_cast<ISurfaceComposer::Rotation>(rotation));
+            reply->writeInt32(res);
+            return NO_ERROR;
+        }
         case AUTHENTICATE_SURFACE: {
             CHECK_INTERFACE(ISurfaceComposer, data, reply);
             sp<IGraphicBufferProducer> bufferProducer =
-- 
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