Merge "SF: Add a sf backdoor to enable mirroring one display to another." into main (2090f661) · Commits · e / os / platform_frameworks_native

services/surfaceflinger/SurfaceFlinger.cpp

+71 −4

Original line number	Diff line number	Diff line
		@@ -68,6 +68,7 @@
		#include <gui/LayerMetadata.h>
		#include <gui/LayerState.h>
		#include <gui/Surface.h>
		#include <gui/SurfaceComposerClient.h>
		#include <gui/TraceUtils.h>
		#include <hidl/ServiceManagement.h>
		#include <layerproto/LayerProtoParser.h>
		@@ -91,13 +92,12 @@
		#include <ui/LayerStack.h>
		#include <ui/PixelFormat.h>
		#include <ui/StaticDisplayInfo.h>
		#include <unistd.h>
		#include <utils/StopWatch.h>
		#include <utils/String16.h>
		#include <utils/String8.h>
		#include <utils/Timers.h>
		#include <utils/misc.h>

		#include <unistd.h>
		#include <algorithm>
		#include <cerrno>
		#include <cinttypes>
		@@ -6522,9 +6522,9 @@ status_t SurfaceFlinger::CheckTransactCodeCredentials(uint32_t code) {
		code == IBinder::SYSPROPS_TRANSACTION) {
		return OK;
		}
		// Numbers from 1000 to 1043 are currently used for backdoors. The code
		// Numbers from 1000 to 1044 are currently used for backdoors. The code
		// in onTransact verifies that the user is root, and has access to use SF.
		if (code >= 1000 && code <= 1043) {
		if (code >= 1000 && code <= 1044) {
		ALOGV("Accessing SurfaceFlinger through backdoor code: %u", code);
		return OK;
		}
		@@ -7003,6 +7003,73 @@ status_t SurfaceFlinger::onTransact(uint32_t code, const Parcel& data, Parcel* r
		future.wait();
		return NO_ERROR;
		}

		case 1044: { // Enable/Disable mirroring from one display to another
		/*
		* Mirror one display onto another.
		* Ensure the source and destination displays are on.
		* Commands:
		* 0: Mirror one display to another
		* 1: Disable mirroring to a previously mirrored display
		* 2: Disable mirroring on previously mirrored displays
		*
		* Ex:
		* Get the display ids:
		* adb shell dumpsys SurfaceFlinger --display-id
		* Mirror first display to the second:
		* adb shell service call SurfaceFlinger 1044 i64 0 i64 4619827677550801152 i64
		* 4619827677550801153
		* Stop mirroring:
		* adb shell service call SurfaceFlinger 1044 i64 1
		*/

		int64_t arg0 = data.readInt64();

		switch (arg0) {
		case 0: {
		// Mirror arg1 to arg2
		int64_t arg1 = data.readInt64();
		int64_t arg2 = data.readInt64();
		// Enable mirroring for one display
		const auto display1id = DisplayId::fromValue(arg1);
		auto mirrorRoot = SurfaceComposerClient::getDefault()->mirrorDisplay(
		display1id.value());
		auto id2 = DisplayId::fromValue<PhysicalDisplayId>(arg2);
		const auto token2 = getPhysicalDisplayToken(*id2);
		ui::LayerStack layerStack;
		{
		Mutex::Autolock lock(mStateLock);
		sp<DisplayDevice> display = getDisplayDeviceLocked(token2);
		layerStack = display->getLayerStack();
		}
		SurfaceComposerClient::Transaction t;
		t.setDisplayLayerStack(token2, layerStack);
		t.setLayer(mirrorRoot, INT_MAX); // Top-most layer
		t.setLayerStack(mirrorRoot, layerStack);
		t.apply();

		mMirrorMapForDebug.emplace_or_replace(arg2, mirrorRoot);
		break;
		}

		case 1: {
		// Disable mirroring for arg1
		int64_t arg1 = data.readInt64();
		mMirrorMapForDebug.erase(arg1);
		break;
		}

		case 2: {
		// Disable mirroring for all displays
		mMirrorMapForDebug.clear();
		break;
		}

		default:
		return BAD_VALUE;
		}
		return NO_ERROR;
		}
		}
		}
		return err;

services/surfaceflinger/SurfaceFlinger.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -1443,6 +1443,10 @@ private:

		// WindowInfo ids visible during the last commit.
		std::unordered_set<int32_t> mVisibleWindowIds;

		// Mirroring
		// Map of displayid to mirrorRoot
		ftl::SmallMap<int64_t, sp<SurfaceControl>, 3> mMirrorMapForDebug;
		};

		class SurfaceComposerAIDL : public gui::BnSurfaceComposer {