213 lines
8.4 KiB
C
213 lines
8.4 KiB
C
/****************************************************************************
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* include/nuttx/video/vnc.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_VIDEO_VNC_H
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#define __INCLUDE_NUTTX_VIDEO_VNC_H
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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 <stdint.h>
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#include <nuttx/nx/nxglib.h>
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* These are the types of the function pointers used to support callouts when
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* mouse or keyboard inputs are received by the local VNC server from the
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* remove VNC client. Notice that these callouts have arguments that match
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* the inputs to nx_kbdin() and nx_mousein().
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*/
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typedef CODE void (*vnc_mouseout_t)(FAR void *arg, nxgl_coord_t x,
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nxgl_coord_t y, uint8_t buttons);
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typedef CODE void (*vnc_kbdout_t)(FAR void *arg, uint8_t nch,
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FAR const uint8_t *ch);
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Function: vnc_fbinitialize
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*
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* Description:
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* Initialize the VNC frame buffer driver. The VNC frame buffer driver
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* supports two initialization interfaces: The standard up_fbinitialize()
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* that will be called from the graphics layer and this speical
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* initialization function that can be used only by VNC aware OS logic.
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*
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* The two initialization functions may be called separated or together in
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* either order. The difference is that standard up_fbinitialize(), if
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* used by itself, will not have any remote mouse or keyboard inputs that
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* are reported to the VNC framebuffer driver from the remote VNC client.
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*
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* In the standard graphics architecture, the keyboard/mouse inputs are
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* received by some appliation/board specific logic at the highest level
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* in the architecture via input drivers. The received keyboard/mouse
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* input data must then be "injected" into NX where it can they can be
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* assigned to the window that has focus. They will eventually be
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* received by the Window instances via NX callback methods.
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*
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* NX is a middleware layer in the architecture, below the
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* application/board specific logic but above the driver level logic. The
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* frame buffer driver, on the other hand lies at the very lowest level in
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* the graphics architecture. It cannot call upward into the application
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* nor can it call upward into NX. So, some other logic.
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*
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* vnc_fbinitialize() provides an optional, alternative initialization
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* function. It is optional becuase it need not be called. If it is not
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* called, however, keyboard/mouse inputs from the remote VNC client will
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* be lost. By calling vnc_fbinitialize(), you can provide callout
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* functions that can be received by logic higher in the architure. This
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* higher level level callouts can then call nx_kbdin() or nx_mousein() on
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* behalf of the VNC server.
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*
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* See also vnc_default_fbinitialize() below.
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*
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* Parameters:
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* display - In the case of hardware with multiple displays, this
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* specifies the display. Normally this is zero.
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* kbdout - If non-NULL, then the pointed-to function will be called to
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* handle all keyboard input as it is received. This may be either raw,
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* ASCII keypress input or encoded keyboard input as determined by
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* CONFIG_VNCSERVER_KBDENCODE. See include/nuttx/input/kbd_codec.h.
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* mouseout - If non-NULL, then the pointed-to function will be called to
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* handle all mouse input as it is received.
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* arg - An opaque user provided argument that will be provided when the
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* callouts are performed.
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int vnc_fbinitialize(int display, vnc_kbdout_t kbdout,
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vnc_mouseout_t mouseout, FAR void *arg);
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/****************************************************************************
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* Function: vnc_mouse and vnc_kbdout
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*
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* Description:
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* These are the default keyboard/mouse callout functions. They are
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* simply wrappers around nx_mousein() and nx_kdbout(), respectively. When
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* configured using vnc_fbinitialize(), the 'arg' must be the correct
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* NXHANDLE value.
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*
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* See also vnc_default_fbinitialize() below.
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*
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* Parameters:
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* See vnc_mouseout_t and vnc_kbdout_t typde definitions above. These
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* callouts have arguments that match the inputs to nx_kbdin() and
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* nx_mousein() (if arg is really of type NXHANDLE).
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#ifdef CONFIG_NX_KBD
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void vnc_kbdout(FAR void *arg, uint8_t nch, FAR const uint8_t *ch);
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#endif
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#ifdef CONFIG_NX_XYINPUT
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void vnc_mouseout(FAR void *arg, nxgl_coord_t x, nxgl_coord_t y,
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uint8_t buttons);
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#endif
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/****************************************************************************
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* Function: vnc_default_fbinitialize
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*
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* Description:
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* This is just a wrapper around vnc_fbinitialize() that will establish
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* the default mouse and keyboard callout functions.
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*
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* Parameters:
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* display - In the case of hardware with multiple displays, this
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* specifies the display. Normally this is zero.
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* handle - And instance of NXHANDLE returned from initialization of the
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* NX graphics system for that display.
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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/* int vnc_default_fbinitialize(int display, NXHANDLE handle); */
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#if defined(CONFIG_NX_KBD) && defined(CONFIG_NX_XYINPUT)
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#define vnc_default_fbinitialize(d,h) \
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vnc_fbinitialize((d), vnc_kbdout, vnc_mouseout, (FAR void *)(h))
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#elif defined(CONFIG_NX_KBD)
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#define vnc_default_fbinitialize(d,h) \
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vnc_fbinitialize((d), vnc_kbdout, NULL, (FAR void *)(h))
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#elif defined(CONFIG_NX_XYINPUT)
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#define vnc_default_fbinitialize(d,h) \
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vnc_fbinitialize((d), NULL, vnc_mouseout, (FAR void *)(h))
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#else
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#define vnc_default_fbinitialize(d,h) \
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vnc_fbinitialize((d), NULL, NULL, NULL)
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_NUTTX_VIDEO_VNC_H */
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