66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
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/****************************************************************************
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* graphics/nxbe/nxbe_notify_rectangle.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/nx/nxglib.h>
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#include "nxbe.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxbe_notify_rectangle
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*
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* Description:
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* When CONFIG_NX_UPDATE=y, then the graphics system will callout to
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* inform some external module that the display has been updated. This
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* would be useful in a couple for cases.
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*
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* - When a serial LCD is used, but a framebuffer is used to access the
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* LCD. In this case, the update callout can be used to refresh the
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* affected region of the display.
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*
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* - When VNC is enabled. This is case, this callout is necessary to
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* update the remote frame buffer to match the local framebuffer.
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*
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* When this feature is enabled, some external logic must provide this
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* interface. This is the function that will handle the notification. It
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* receives the rectangular region that was updated on the provided plane.
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*
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****************************************************************************/
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#ifdef CONFIG_NX_UPDATE
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void nxbe_notify_rectangle(FAR NX_DRIVERTYPE *dev,
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FAR const struct nxgl_rect_s *rect)
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{
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struct fb_area_s area;
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nxgl_rect2area(&area, rect);
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dev->updatearea(dev, &area);
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}
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#endif
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