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

1 files changed, 9 insertions, 0 deletions

diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 40e319e28a..15c4c9a880 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -731,6 +731,15 @@ status_t ScreenshotClient::captureToBuffer(const sp<IBinder>& display,
     return ret;
 }
 
+status_t ScreenshotClient::captureLayers(const sp<IBinder>& layerHandle,
+                                         const sp<IGraphicBufferProducer>& producer,
+                                         uint32_t rotation) {
+    sp<ISurfaceComposer> s(ComposerService::getComposerService());
+    if (s == NULL) return NO_INIT;
+    return s->captureLayers(layerHandle, producer,
+                            static_cast<ISurfaceComposer::Rotation>(rotation));
+}
+
 ScreenshotClient::ScreenshotClient()
     : mHaveBuffer(false) {
     memset(&mBuffer, 0, sizeof(mBuffer));