we need to wait for vsync when doing the screen-off animation (ed9807bd) · Commits · e / os / android_frameworks_native-old

services/surfaceflinger/SurfaceFlinger.cpp

+48 −0

Original line number	Diff line number	Diff line
		@@ -62,6 +62,7 @@

		#include <private/android_filesystem_config.h>
		#include <private/gui/SharedBufferStack.h>
		#include <gui/BitTube.h>

		#define EGL_VERSION_HW_ANDROID 0x3143

		@@ -1845,6 +1846,35 @@ status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,

		// ---------------------------------------------------------------------------

		class VSyncWaiter {
		DisplayEventReceiver::Event buffer[4];
		sp<Looper> looper;
		sp<IDisplayEventConnection> events;
		sp<BitTube> eventTube;
		public:
		VSyncWaiter(const sp<EventThread>& eventThread) {
		looper = new Looper(true);
		events = eventThread->createEventConnection();
		eventTube = events->getDataChannel();
		looper->addFd(eventTube->getFd(), 0, ALOOPER_EVENT_INPUT, 0, 0);
		events->requestNextVsync();
		}

		void wait() {
		ssize_t n;

		looper->pollOnce(-1);
		// we don't handle any errors here, it doesn't matter
		// and we don't want to take the risk to get stuck.

		// drain the events...
		while ((n = DisplayEventReceiver::getEvents(
		eventTube, buffer, 4)) > 0) ;

		events->requestNextVsync();
		}
		};

		status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
		{
		// get screen geometry
		@@ -1937,6 +1967,8 @@ status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
		}
		};

		VSyncWaiter vsync(mEventThread);

		// the full animation is 24 frames
		char value[PROPERTY_VALUE_MAX];
		property_get("debug.sf.electron_frames", value, "24");
		@@ -1963,6 +1995,9 @@ status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
		const float vg = itg(i);
		const float vb = itb(i);

		// wait for vsync
		vsync.wait();

		// clear screen
		glColorMask(1,1,1,1);
		glClear(GL_COLOR_BUFFER_BIT);
		@@ -1998,6 +2033,10 @@ status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
		for (int i=0 ; i<nbFrames ; i++) {
		const float v = itg(i);
		hverts(vtx, v);

		// wait for vsync
		vsync.wait();

		glClear(GL_COLOR_BUFFER_BIT);
		glColor4f(1-v, 1-v, 1-v, 1);
		glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
		@@ -2095,6 +2134,8 @@ status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
		}
		};

		VSyncWaiter vsync(mEventThread);

		// the full animation is 12 frames
		int nbFrames = 8;
		s_curve_interpolator itr(nbFrames, 7.5f);
		@@ -2108,6 +2149,10 @@ status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
		for (int i=nbFrames-1 ; i>=0 ; i--) {
		const float v = itg(i);
		hverts(vtx, v);

		// wait for vsync
		vsync.wait();

		glClear(GL_COLOR_BUFFER_BIT);
		glColor4f(1-v, 1-v, 1-v, 1);
		glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
		@@ -2124,6 +2169,9 @@ status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
		const float vg = itg(i);
		const float vb = itb(i);

		// wait for vsync
		vsync.wait();

		// clear screen
		glColorMask(1,1,1,1);
		glClear(GL_COLOR_BUFFER_BIT);