[ANativeWindow] Add getLastQueuedBuffer api (ef0b1530) · Commits · e / os / android_frameworks_native

libs/gui/Surface.cpp

+27 −0

Original line number	Diff line number	Diff line
		@@ -1180,6 +1180,9 @@ int Surface::perform(int operation, va_list args)
		allocateBuffers();
		res = NO_ERROR;
		break;
		case NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER:
		res = dispatchGetLastQueuedBuffer(args);
		break;
		default:
		res = NAME_NOT_FOUND;
		break;
		@@ -1452,6 +1455,30 @@ int Surface::dispatchAddQueueInterceptor(va_list args) {
		return NO_ERROR;
		}

		int Surface::dispatchGetLastQueuedBuffer(va_list args) {
		AHardwareBuffer buffer = va_arg(args, AHardwareBuffer);
		int* fence = va_arg(args, int*);
		float* matrix = va_arg(args, float*);
		sp<GraphicBuffer> graphicBuffer;
		sp<Fence> spFence;

		int result = mGraphicBufferProducer->getLastQueuedBuffer(&graphicBuffer, &spFence, matrix);

		if (graphicBuffer != nullptr) {
		buffer = reinterpret_cast<AHardwareBuffer>(graphicBuffer.get());
		AHardwareBuffer_acquire(*buffer);
		} else {
		*buffer = nullptr;
		}

		if (spFence != nullptr) {
		*fence = spFence->dup();
		} else {
		*fence = -1;
		}
		return result;
		}

		bool Surface::transformToDisplayInverse() {
		return (mTransform & NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY) ==
		NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;

libs/gui/include/gui/Surface.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -262,6 +262,7 @@ private:
		int dispatchAddDequeueInterceptor(va_list args);
		int dispatchAddPerformInterceptor(va_list args);
		int dispatchAddQueueInterceptor(va_list args);
		int dispatchGetLastQueuedBuffer(va_list args);
		bool transformToDisplayInverse();

		protected:

libs/nativewindow/include/system/window.h

+31 −0

Original line number	Diff line number	Diff line
		@@ -253,6 +253,7 @@ enum {
		NATIVE_WINDOW_SET_PERFORM_INTERCEPTOR = 43, /* private */
		NATIVE_WINDOW_SET_QUEUE_INTERCEPTOR = 44, /* private */
		NATIVE_WINDOW_ALLOCATE_BUFFERS = 45, /* private */
		NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER = 46, /* private */
		// clang-format on
		};

		@@ -1018,4 +1019,34 @@ static inline int native_window_set_frame_rate(struct ANativeWindow* window, flo
		return window->perform(window, NATIVE_WINDOW_SET_FRAME_RATE, (double)frameRate);
		}

		// ------------------------------------------------------------------------------------------------
		// Candidates for APEX visibility
		// These functions are planned to be made stable for APEX modules, but have not
		// yet been stabilized to a specific api version.
		// ------------------------------------------------------------------------------------------------

		/**
		* Retrieves the last queued buffer for this window, along with the fence that
		* fires when the buffer is ready to be read, and the 4x4 coordinate
		* transform matrix that should be applied to the buffer's content. The
		* transform matrix is represented in column-major order.
		*
		* If there was no buffer previously queued, then outBuffer will be NULL and
		* the value of outFence will be -1.
		*
		* Note that if outBuffer is not NULL, then the caller will hold a reference
		* onto the buffer. Accordingly, the caller must call AHardwareBuffer_release
		* when the buffer is no longer needed so that the system may reclaim the
		* buffer.
		*
		* \return NO_ERROR on success.
		* \return NO_MEMORY if there was insufficient memory.
		*/
		static inline int ANativeWindow_getLastQueuedBuffer(ANativeWindow* window,
		AHardwareBuffer** outBuffer, int* outFence,
		float outTransformMatrix[16]) {
		return window->perform(window, NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER, outBuffer, outFence,
		outTransformMatrix);
		}

		__END_DECLS