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NX: Add configurable callout to external logic to handle display update events

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This commit is contained in:
Gregory Nutt
2016-04-17 11:57:43 -06:00
parent aa64214877
commit 52b308cbe1
7 changed files with 137 additions and 11 deletions
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include/nuttx/nx/nx.h
+26
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@@ -901,6 +901,32 @@ int nx_bitmap(NXWINDOW hwnd, FAR const struct nxgl_rect_s *dest,
FAR const void *src[CONFIG_NX_NPLANES],
FAR const struct nxgl_point_s *origin, unsigned int stride);
/****************************************************************************
* Name: nx_notify_rectangle
*
* Description:
* When CONFIG_NX_UPDATE=y, then the graphics system will callout to
* inform some external module that the display has been updated. This
* would be useful in a couple for cases.
*
* - When a serial LCD is used, but a framebuffer is used to access the
* LCD. In this case, the update callout can be used to refresh the
* affected region of the display.
*
* - When VNC is enabled. This is case, this callout is necessary to
* update the remote frame buffer to match the local framebuffer.
*
* When this feature is enabled, some external logic must provide this
* interface. This is the function that will handle the notification. It
* receives the rectangular region that was updated on the provided plane.
*
****************************************************************************/
#ifdef CONFIG_NX_UPDATE
void nx_notify_rectangle(FAR NX_PLANEINFOTYPE *pinfo,
FAR const struct nxgl_rect_s *rect);
#endif
/****************************************************************************
* Name: nx_kbdin
*