Skip frames with no damage (240ff624) · Commits · e / os / android_frameworks_base

libs/hwui/FrameInfo.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@ enum class FrameInfoFlags {
		kWindowLayoutChanged = 1 << 0,
		kRTAnimation = 1 << 1,
		kSurfaceCanvas = 1 << 2,
		kSkippedFrame = 1 << 3,
		};
		MAKE_FLAGS_ENUM(FrameInfoFlags)

		@@ -101,6 +102,10 @@ public:
		set(FrameInfoIndex::kFrameCompleted) = systemTime(CLOCK_MONOTONIC);
		}

		void addFlag(FrameInfoFlags flag) {
		set(FrameInfoIndex::kFlags) \|= static_cast<uint64_t>(flag);
		}

		int64_t operator[](FrameInfoIndex index) const {
		if (index == FrameInfoIndex::kNumIndexes) return 0;
		return mFrameInfo[static_cast<int>(index)];

libs/hwui/renderthread/CanvasContext.cpp

+26 −3

Original line number	Diff line number	Diff line
		@@ -27,12 +27,25 @@
		#include "../OpenGLRenderer.h"

		#include <algorithm>
		#include <cutils/properties.h>
		#include <private/hwui/DrawGlInfo.h>
		#include <strings.h>

		#define TRIM_MEMORY_COMPLETE 80
		#define TRIM_MEMORY_UI_HIDDEN 20

		#define PROPERTY_SKIP_EMPTY_DAMAGE "debug.hwui.skip_empty_damage"

		static bool sInitialized = false;
		static bool sSkipEmptyDamage = true;

		static void initGlobals() {
		if (sInitialized) return;
		sInitialized = true;
		sSkipEmptyDamage = property_get_bool(PROPERTY_SKIP_EMPTY_DAMAGE,
		sSkipEmptyDamage);
		}

		namespace android {
		namespace uirenderer {
		namespace renderthread {
		@@ -45,6 +58,9 @@ CanvasContext::CanvasContext(RenderThread& thread, bool translucent,
		, mAnimationContext(contextFactory->createAnimationContext(mRenderThread.timeLord()))
		, mRootRenderNode(rootRenderNode)
		, mJankTracker(thread.timeLord().frameIntervalNanos()) {
		// Done lazily at first draw instead of at library load to avoid
		// running pre-zygote fork
		initGlobals();
		mRenderThread.renderState().registerCanvasContext(this);
		mProfiler.setDensity(mRenderThread.mainDisplayInfo().density);
		}
		@@ -203,12 +219,17 @@ void CanvasContext::draw() {
		LOG_ALWAYS_FATAL_IF(!mCanvas \|\| mEglSurface == EGL_NO_SURFACE,
		"drawRenderNode called on a context with no canvas or surface!");

		profiler().markPlaybackStart();
		mCurrentFrameInfo->markIssueDrawCommandsStart();

		SkRect dirty;
		mDamageAccumulator.finish(&dirty);

		if (dirty.isEmpty() && sSkipEmptyDamage) {
		mCurrentFrameInfo->addFlag(FrameInfoFlags::kSkippedFrame);
		return;
		}

		profiler().markPlaybackStart();
		mCurrentFrameInfo->markIssueDrawCommandsStart();

		EGLint width, height;
		mEglManager.beginFrame(mEglSurface, &width, &height);
		if (width != mCanvas->getViewportWidth() \|\| height != mCanvas->getViewportHeight()) {
		@@ -277,6 +298,8 @@ void CanvasContext::doFrame() {
		prepareTree(info, frameInfo);
		if (info.out.canDrawThisFrame) {
		draw();
		} else {
		mCurrentFrameInfo->addFlag(FrameInfoFlags::kSkippedFrame);
		}
		}