libs/ui: Add support for triple framebuffers (0bc64be3) · Commits · e / os / android_frameworks_native

include/ui/FramebufferNativeWindow.h

+3 −2

Original line number	Diff line number	Diff line
		@@ -28,7 +28,8 @@
		#include <ui/ANativeObjectBase.h>
		#include <ui/Rect.h>

		#define NUM_FRAME_BUFFERS 2
		#define MIN_NUM_FRAME_BUFFERS 2
		#define MAX_NUM_FRAME_BUFFERS 3

		extern "C" EGLNativeWindowType android_createDisplaySurface(void);

		@@ -74,7 +75,7 @@ private:
		framebuffer_device_t* fbDev;
		alloc_device_t* grDev;

		sp<NativeBuffer> buffers[NUM_FRAME_BUFFERS];
		sp<NativeBuffer> buffers[MAX_NUM_FRAME_BUFFERS];
		sp<NativeBuffer> front;

		mutable Mutex mutex;

+12 −6

Original line number	Diff line number	Diff line
		@@ -92,8 +92,13 @@ FramebufferNativeWindow::FramebufferNativeWindow()
		mUpdateOnDemand = (fbDev->setUpdateRect != 0);

		// initialize the buffer FIFO
		mNumBuffers = NUM_FRAME_BUFFERS;
		mNumFreeBuffers = NUM_FRAME_BUFFERS;
		if(fbDev->numFramebuffers >= MIN_NUM_FRAME_BUFFERS &&
		fbDev->numFramebuffers <= MAX_NUM_FRAME_BUFFERS){
		mNumBuffers = fbDev->numFramebuffers;
		} else {
		mNumBuffers = MIN_NUM_FRAME_BUFFERS;
		}
		mNumFreeBuffers = mNumBuffers;
		mBufferHead = mNumBuffers-1;

		/*
		@@ -154,10 +159,11 @@ FramebufferNativeWindow::FramebufferNativeWindow()
		FramebufferNativeWindow::~FramebufferNativeWindow()
		{
		if (grDev) {
		if (buffers[0] != NULL)
		grDev->free(grDev, buffers[0]->handle);
		if (buffers[1] != NULL)
		grDev->free(grDev, buffers[1]->handle);
		for(int i = 0; i < mNumBuffers; i++) {
		if (buffers[i] != NULL) {
		grDev->free(grDev, buffers[i]->handle);
		}
		}
		gralloc_close(grDev);
		}