add support for [1974164] Be able to take a screen shot on the device
screenshots are taken using ISurfaceComposer::captureScreen() which returns
the size of the screenshot and an IMemoryHeap containing the data.
screenshots have limitations:
- they will always fail if a secure window is up on screen
- require GL_OES_framebuffer_object extension
- in some situation, video planes won't been captured
Change-Id: I741c68a2d2984fb139039301c3349e6780e2cd58
diff --git a/libs/surfaceflinger_client/ISurfaceComposer.cpp b/libs/surfaceflinger_client/ISurfaceComposer.cpp
index 5c111f6..040060e 100644
--- a/libs/surfaceflinger_client/ISurfaceComposer.cpp
+++ b/libs/surfaceflinger_client/ISurfaceComposer.cpp
@@ -124,6 +124,21 @@
remote()->transact(BnSurfaceComposer::BOOT_FINISHED, data, &reply);
}
+ virtual status_t captureScreen(DisplayID dpy,
+ sp<IMemoryHeap>* heap,
+ uint32_t* width, uint32_t* height, PixelFormat* format)
+ {
+ Parcel data, reply;
+ data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+ data.writeInt32(dpy);
+ remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
+ *heap = interface_cast<IMemoryHeap>(reply.readStrongBinder());
+ *width = reply.readInt32();
+ *height = reply.readInt32();
+ *format = reply.readInt32();
+ return reply.readInt32();
+ }
+
virtual void signal() const
{
Parcel data, reply;
@@ -190,6 +205,19 @@
sp<IBinder> b = getCblk()->asBinder();
reply->writeStrongBinder(b);
} break;
+ case CAPTURE_SCREEN: {
+ CHECK_INTERFACE(ISurfaceComposer, data, reply);
+ DisplayID dpy = data.readInt32();
+ sp<IMemoryHeap> heap;
+ uint32_t w, h;
+ PixelFormat f;
+ status_t res = captureScreen(dpy, &heap, &w, &h, &f);
+ reply->writeStrongBinder(heap->asBinder());
+ reply->writeInt32(w);
+ reply->writeInt32(h);
+ reply->writeInt32(f);
+ reply->writeInt32(res);
+ } break;
default:
return BBinder::onTransact(code, data, reply, flags);
}