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nuttx/graphics/nxmu/nxfe.h
patacongo 9efa4813ac NxWM: Add a missing part of the message blocking logic 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4748 42af7a65-404d-4744-a932-0658087f49c3
2012-05-19 01:01:00 +00:00

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/****************************************************************************
* graphics/nxmu/nxfe.h
*
* Copyright (C) 2008-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __GRAPHICS_NXMU_NXFE_H
#define __GRAPHICS_NXMU_NXFE_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <mqueue.h>
#include <semaphore.h>
#include <nuttx/nx/nx.h>
#include "nxbe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifdef CONFIG_DISABLE_MQUEUE
# error "Message queues are disabled(CONFIG_DISABLE_MQUEUE)"
#endif
#ifndef CONFIG_NX_MXSERVERMSGS
# define CONFIG_NX_MXSERVERMSGS 32 /* Number of pending messages in server MQ */
#endif
#ifndef CONFIG_NX_MXCLIENTMSGS
# define CONFIG_NX_MXCLIENTMSGS 16 /* Number of pending messages in each client MQ */
#endif
/* Used to create unique client MQ name */
#define NX_CLIENT_MQNAMEFMT "/dev/nxc%d"
#define NX_CLIENT_MXNAMELEN (16)
#define NX_MXSVRMSGLEN (64) /* Maximum size of a client->server command */
#define NX_MXEVENTLEN (64) /* Maximum size of an event */
#define NX_MXCLIMSGLEN (64) /* Maximum size of a server->client message */
/* Handy macros */
#define nxmu_semgive(sem) sem_post(sem) /* To match nxmu_semtake() */
/****************************************************************************
* Public Types
****************************************************************************/
/* Client/Connection structures *********************************************/
/* Client state */
enum nx_clistate_e
{
NX_CLISTATE_NOTCONNECTED = 0, /* Waiting for server to acknowledge connection */
NX_CLISTATE_CONNECTED, /* Connection established (normal state) */
NX_CLISTATE_DISCONNECT_PENDING, /* Waiting for server to acknowledge disconnect */
};
/* This structure represents a connection between the client and the server */
struct nxfe_conn_s
{
/* This number uniquely identifies the client */
int cid; /* Client ID (CID) */
uint8_t state; /* See enum nx_clistate_e */
/* These are only usable on the client side of the connection */
mqd_t crdmq; /* MQ to read from the server (may be non-blocking) */
mqd_t cwrmq; /* MQ to write to the server (blocking) */
/* These are only usable on the server side of the connection */
mqd_t swrmq; /* MQ to write to the client */
};
/* Server state structure ***************************************************/
/* This the server 'front-end' state structure */
struct nxfe_state_s
{
/* The 'back-end' window status. Must be first so that instances of
* struct nxbe_state_s can be simply cast to an instance of struct
* nxfe_state_s
*/
struct nxbe_state_s be;
/* This is the server's connection to iself */
struct nxfe_conn_s conn;
};
/* Message IDs **************************************************************/
enum nxmsg_e
{
/* Server-to-Client Messages **********************************************/
NX_CLIMSG_CONNECTED = 1, /* The server has completed the connection and is ready */
NX_CLIMSG_DISCONNECTED, /* The server has disconnected */
NX_CLIMSG_REDRAW, /* Re-draw the specified window */
NX_CLIMSG_NEWPOSITION, /* New window size/position */
NX_CLIMSG_MOUSEIN, /* New mouse positional data available for window */
NX_CLIMSG_KBDIN, /* New keypad input available for window */
NX_CLIMSG_BLOCKED, /* The window is blocked */
/* Client-to-Server Messages **********************************************/
NX_SVRMSG_CONNECT, /* Establish connection with new NX server client */
NX_SVRMSG_DISCONNECT, /* Tear down connection with terminating client */
NX_SVRMSG_OPENWINDOW, /* Create a new window */
NX_SVRMSG_CLOSEWINDOW, /* Close an existing window */
NX_SVRMSG_BLOCKED, /* The window is blocked */
NX_SVRMSG_REQUESTBKGD, /* Open the background window */
NX_SVRMSG_RELEASEBKGD, /* Release the background window */
NX_SVRMSG_SETPOSITION, /* Window position has changed */
NX_SVRMSG_SETSIZE, /* Window size has changed */
NX_SVRMSG_GETPOSITION, /* Get the current window position and size */
NX_SVRMSG_RAISE, /* Move the window to the top */
NX_SVRMSG_LOWER, /* Move the window to the bottom */
NX_SVRMSG_SETPIXEL, /* Set a single pixel in the window with a color */
NX_SVRMSG_FILL, /* Fill a rectangle in the window with a color */
NX_SVRMSG_GETRECTANGLE, /* Get a rectangular region in the window */
NX_SVRMSG_FILLTRAP, /* Fill a trapezoidal region in the window with a color */
NX_SVRMSG_MOVE, /* Move a rectangular region within the window */
NX_SVRMSG_BITMAP, /* Copy a rectangular bitmap into the window */
NX_SVRMSG_SETBGCOLOR, /* Set the color of the background */
NX_SVRMSG_MOUSEIN, /* New mouse report from mouse client */
NX_SVRMSG_KBDIN, /* New keyboard report from keyboard client */
};
/* Message priorities -- they must all be at the same priority to assure
* FIFO execution.
*/
#define NX_CLIMSG_PRIO 42
#define NX_SVRMSG_PRIO 42
/* Server-to-Client Message Structures **************************************/
/* The generic message structure. All messages begin with this form. */
struct nxclimsg_s
{
uint32_t msgid; /* Any of nxclimsg_e */
};
/* The server is now connected */
struct nxclimsg_connected_s
{
uint32_t msgid; /* NX_CLIMSG_REDRAW_CONNECTED */
};
/* The server is now disconnected */
struct nxclimsg_disconnected_s
{
uint32_t msgid; /* NX_CLIMSG_REDRAW_DISCONNECTED */
};
/* This message is received when a requested window has been opened. If wnd is NULL
* then errorcode is the errno value that provides the explanation of the error.
*/
struct nxclimsg_redraw_s
{
uint32_t msgid; /* NX_CLIMSG_REDRAW */
FAR struct nxbe_window_s *wnd; /* The handle to the window to redraw in */
FAR struct nxgl_rect_s rect; /* The rectangle to be redrawn */
bool more; /* true: more redraw messages follow */
};
/* This message informs the client of the new size or position of the window */
struct nxclimsg_newposition_s
{
uint32_t msgid; /* NX_CLIMSG_NEWPOSITION */
FAR struct nxbe_window_s *wnd; /* The window whose position/size has changed */
FAR struct nxgl_size_s size; /* The current window size */
FAR struct nxgl_point_s pos; /* The current window position */
FAR struct nxgl_rect_s bounds; /* Size of screen */
};
/* This message reports a new mouse event to a particular window */
#ifdef CONFIG_NX_MOUSE
struct nxclimsg_mousein_s
{
uint32_t msgid; /* NX_SVRMSG_MOUSEIN */
FAR struct nxbe_window_s *wnd; /* The handle of window receiving mouse input */
struct nxgl_point_s pos; /* Mouse X/Y position */
uint8_t buttons; /* Mouse button set */
};
#endif
/* This message reports a new keypad event to a particular window */
#ifdef CONFIG_NX_KBD
struct nxclimsg_kbdin_s
{
uint32_t msgid; /* NX_CLIMSG_KBDIN */
FAR struct nxbe_window_s *wnd; /* The handle of window receiving keypad input */
uint8_t nch; /* Number of characters received */
uint8_t ch[1]; /* Array of received characters */
};
#endif
/* This messsage confirms that that all queued window messages have been
* flushed and that the all further window messages are blocked.
*/
struct nxclimsg_blocked_s
{
uint32_t msgid; /* NX_CLIMSG_BLOCKED */
FAR struct nxbe_window_s *wnd; /* The window that is blocked */
FAR void *arg; /* User argument */
};
/* Client-to-Server Message Structures **************************************/
/* The generic message structure. All server messages begin with this form. Also
* messages that have no additional data fields use this structure. This includes:
* NX_SVRMSG_CONNECT and NX_SVRMSG_DISCONNECT.
*/
struct nxsvrmsg_s /* Generic server message */
{
uint32_t msgid; /* One of enum nxsvrmsg_e */
FAR struct nxfe_conn_s *conn; /* The specific connection sending the message */
};
/* This message requests the server to create a new window */
struct nxsvrmsg_openwindow_s
{
uint32_t msgid; /* NX_SVRMSG_OPENWINDOW */
FAR struct nxbe_window_s *wnd; /* The pre-allocated window structure */
};
/* This message informs the server that client wishes to close a window */
struct nxsvrmsg_closewindow_s
{
uint32_t msgid; /* NX_SVRMSG_CLOSEWINDOW */
FAR struct nxbe_window_s *wnd; /* The window to be closed */
};
/* This messsage is just a marker that is queued and forwarded by the server
* (NX_CLIMSG_BLOCKED). Messages to the window were blocked just after this
* message was sent. Receipt of this message indicates both that the window
* blocked and that there are no further queued messages for the window.
*/
struct nxsvrmsg_blocked_s
{
uint32_t msgid; /* NX_SVRMSG_BLOCKED */
FAR struct nxbe_window_s *wnd; /* The window that is blocked */
FAR void *arg; /* User argument */
};
/* This message requests the server to create a new window */
struct nxsvrmsg_requestbkgd_s
{
uint32_t msgid; /* NX_SVRMSG_REQUESTBKGD */
FAR struct nxfe_conn_s *conn; /* The specific connection sending the message */
FAR const struct nx_callback_s *cb; /* Event handling callbacks */
FAR void *arg; /* Client argument used with callbacks */
};
/* This message informs the server that client wishes to close a window */
struct nxsvrmsg_releasebkgd_s
{
uint32_t msgid; /* NX_SVRMSG_RELEASEBKGD */
};
/* This message informs the server that the size or position of the window has changed */
struct nxsvrmsg_setposition_s
{
uint32_t msgid; /* NX_SVRMSG_SETPOSITION */
FAR struct nxbe_window_s *wnd; /* The window whose position/size has changed */
FAR struct nxgl_point_s pos; /* The new window position */
};
/* This message informs the server that the size or position of the window has changed */
struct nxsvrmsg_setsize_s
{
uint32_t msgid; /* NX_SVRMSG_SETSIZE */
FAR struct nxbe_window_s *wnd; /* The window whose position/size has changed */
FAR struct nxgl_size_s size; /* The new window size */
};
/* This message informs the server that the size or position of the window has changed */
struct nxsvrmsg_getposition_s
{
uint32_t msgid; /* NX_SVRMSG_FETPOSITION */
FAR struct nxbe_window_s *wnd; /* The window whose position/size has changed */
};
/* This message informs the server to raise this window to the top of the display */
struct nxsvrmsg_raise_s
{
uint32_t msgid; /* NX_SVRMSG_RAISE */
FAR struct nxbe_window_s *wnd; /* The window to be raised */
};
/* This message informs the server to lower this window to the bottom of the display */
struct nxsvrmsg_lower_s
{
uint32_t msgid; /* NX_SVRMSG_LOWER */
FAR struct nxbe_window_s *wnd; /* The window to be lowered */
};
/* Set a single pixel in the window with a color */
struct nxsvrmsg_setpixel_s
{
uint32_t msgid; /* NX_SVRMSG_SETPIXEL */
FAR struct nxbe_window_s *wnd; /* The window to fill */
struct nxgl_point_s pos; /* The position of the pixel in the window */
nxgl_mxpixel_t color[CONFIG_NX_NPLANES]; /* Color to use in the fill */
};
/* Fill a rectangle in the window with a color */
struct nxsvrmsg_fill_s
{
uint32_t msgid; /* NX_SVRMSG_FILL */
FAR struct nxbe_window_s *wnd; /* The window to fill */
struct nxgl_rect_s rect; /* The rectangle in the window to fill */
nxgl_mxpixel_t color[CONFIG_NX_NPLANES]; /* Color to use in the fill */
};
/* Get a rectangular region from the the window */
struct nxsvrmsg_getrectangle_s
{
uint32_t msgid; /* NX_SVRMSG_GETRECTANGLE */
FAR struct nxbe_window_s *wnd; /* The window to get from */
struct nxgl_rect_s rect; /* The rectangle in the window to get from */
unsigned int plane; /* The plane number to read */
FAR uint8_t *dest; /* Memory location in which to store the graphics data */
unsigned int deststride; /* Width of the destination memory in bytes */
};
/* Fill a trapezoidal region in the window with a color */
struct nxsvrmsg_filltrapezoid_s
{
uint32_t msgid; /* NX_SVRMSG_FILLTRAP */
FAR struct nxbe_window_s *wnd; /* The window to fill */
FAR struct nxgl_rect_s clip; /* The clipping window */
struct nxgl_trapezoid_s trap; /* The trapezoidal region in the window to fill */
nxgl_mxpixel_t color[CONFIG_NX_NPLANES]; /* Color to use in the fill */
};
/* Move a rectangular region within the window */
struct nxsvrmsg_move_s
{
uint32_t msgid; /* NX_SVRMSG_MOVE */
FAR struct nxbe_window_s *wnd; /* The window within which the move is done */
struct nxgl_rect_s rect; /* Describes the rectangular region to move */
struct nxgl_point_s offset; /* The offset to move the region */
};
/* Copy a rectangular bitmap into the window */
struct nxsvrmsg_bitmap_s
{
uint32_t msgid; /* NX_SVRMSG_BITMAP */
FAR struct nxbe_window_s *wnd; /* The window with will receive the bitmap image */
struct nxgl_rect_s dest; /* Destination location of the bitmap in the window */
FAR const void *src[CONFIG_NX_NPLANES]; /* The start of the source image. */
struct nxgl_point_s origin; /* Offset into the source image data */
unsigned int stride; /* The width of the full source image in pixels. */
};
/* Set the color of the background */
struct nxsvrmsg_setbgcolor_s
{
uint32_t msgid; /* NX_SVRMSG_SETBGCOLOR */
nxgl_mxpixel_t color[CONFIG_NX_NPLANES]; /* Color to use in the background */
};
/* This message reports a new mouse event from a hardware controller attached to
* the server as a regular client (this message may have even been sent from an
* interrupt handler).
*/
#ifdef CONFIG_NX_MOUSE
struct nxsvrmsg_mousein_s
{
uint32_t msgid; /* NX_SVRMSG_MOUSEIN */
struct nxgl_point_s pt; /* Mouse X/Y position */
uint8_t buttons; /* Mouse button set */
};
#endif
/* This message reports a new keyboard event from a hardware controller attached to
* some kind of keypad (this message may have even been sent from an
* interrupt handler).
*/
#ifdef CONFIG_NX_KBD
struct nxsvrmsg_kbdin_s
{
uint32_t msgid; /* NX_SVRMSG_KBDIN */
uint8_t nch ; /* Number of characters received */
uint8_t ch[1]; /* Array of received characters */
};
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxfe_constructwindow
*
* Description:
* This function is the same a nx_openwindow EXCEPT that the client provides
* the window structure instance. nx_constructwindow will initialize the
* the pre-allocated window structure for use by NX. This function is
* provided in addition to nx_open window in order to support a kind of
* inheritance: The caller's window structure may include extensions that
* are not visible to NX.
*
* NOTE: wnd must have been allocated using malloc() (or related allocators)
* Once provided to nxfe_constructwindow() that memory is owned and managed
* by NX. On certain error conditions or when the window is closed, NX will
* free() the window.
*
* Input Parameters:
* handle - The handle returned by nx_connect
* wnd - The pre-allocated window structure.
* cb - Callbacks used to process window events
* arg - User provided value that will be returned with NX callbacks.
*
* Return:
* OK on success; ERROR on failure with errno set appropriately. In the
* case of ERROR, NX will have dealloated the pre-allocated window.
*
****************************************************************************/
EXTERN int nxfe_constructwindow(NXHANDLE handle,
FAR struct nxbe_window_s *wnd,
FAR const struct nx_callback_s *cb,
FAR void *arg);
/****************************************************************************
* Name: nxmu_semtake
*
* Description:
* Take the semaphore, handling EINTR wakeups. See the nxmu_semgive macro.
*
* Input Parameters:
* sem - the semaphore to be taken.
*
* Return:
* None
*
****************************************************************************/
EXTERN void nxmu_semtake(sem_t *sem);
/****************************************************************************
* Name: nxmu_sendserver
*
* Description:
* Send a message to the server at NX_SVRMSG_PRIO priority
*
* Input Parameters:
* conn - A pointer to the server connection structure
* msg - A pointer to the message to send
* msglen - The length of the message in bytes.
*
* Return:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
EXTERN int nxmu_sendserver(FAR struct nxfe_conn_s *conn,
FAR const void *msg, size_t msglen);
/****************************************************************************
* Name: nxmu_sendwindow
*
* Description:
* Send a message to the server detined for a specific window at
* NX_SVRMSG_PRIO priority
*
* Input Parameters:
* wnd - A pointer to the back-end window structure
* msg - A pointer to the message to send
* msglen - The length of the message in bytes.
*
* Return:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
EXTERN int nxmu_sendwindow(FAR struct nxbe_window_s *wnd, FAR const void *msg,
size_t msglen);
/****************************************************************************
* Name: nxmu_sendclient
*
* Description:
* Send a message to the client at NX_CLIMSG_PRIO priority
*
* Input Parameters:
* conn - A pointer to the server connection structure
* msg - A pointer to the message to send
* msglen - The length of the message in bytes.
*
* Return:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
EXTERN int nxmu_sendclient(FAR struct nxfe_conn_s *conn,
FAR const void *msg, size_t msglen);
/****************************************************************************
* Name: nxmu_openwindow
*
* Description:
* Create a new window.
*
* Input Parameters:
* be - The back-end status structure
* wnd - The pre-allocated window structure to be initialized [IN/OUT]
*
* Return:
* None
*
****************************************************************************/
EXTERN void nxmu_openwindow(FAR struct nxbe_state_s *be,
FAR struct nxbe_window_s *wnd);
/****************************************************************************
* Name: nxmu_requestbkgd
*
* Description:
* Perform the server-side operation for the nx_requestbkgd operation:
* Give the client control of the background window connection and receipt
* of all background window callbacks.
*
* conn - The client containing connection information [IN]
* be - The server state structure [IN]
* cb - Callbacks used to process window events
* arg - User provided argument (see nx_openwindow, nx_constructwindow)
*
* Return:
* None
*
****************************************************************************/
EXTERN void nxmu_requestbkgd(FAR struct nxfe_conn_s *conn,
FAR struct nxbe_state_s *be,
FAR const struct nx_callback_s *cb,
FAR void *arg);
/****************************************************************************
* Name: nxmu_releasebkgd
*
* Description:
* Release the background window previously acquired using nxmu_openbgwindow
* and return control of the background to NX.
*
* Input Parameters:
* fe - The front-end state structure
*
* Return:
* None
*
****************************************************************************/
EXTERN void nxmu_releasebkgd(FAR struct nxfe_state_s *fe);
/****************************************************************************
* Name: nxfe_reportposition
*
* Descripton:
* Report the new size/position of the window.
*
****************************************************************************/
EXTERN void nxfe_reportposition(FAR struct nxbe_window_s *wnd);
/****************************************************************************
* Name: nxfe_redrawreq
*
* Descripton:
* Request the client that has this window to redraw the rectangular region.
*
****************************************************************************/
EXTERN void nxfe_redrawreq(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_rect_s *rect);
/****************************************************************************
* Name: nxmu_mouseinit
*
* Description:
* Initialize with the mouse in the center of the display
*
****************************************************************************/
#ifdef CONFIG_NX_MOUSE
EXTERN void nxmu_mouseinit(int x, int y);
#endif
/****************************************************************************
* Name: nxmu_mousereport
*
* Description:
* Report mouse position info to the specified window
*
* Input Parameters:
* wnd - The window to receive the mouse report
*
* Returned Value:
* 0: Mouse report sent; >0: Mouse report not sent; <0: An error occurred
*
****************************************************************************/
#ifdef CONFIG_NX_MOUSE
EXTERN int nxmu_mousereport(struct nxbe_window_s *wnd);
#endif
/****************************************************************************
* Name: nxmu_mousein
*
* Description:
* New positional data has been received from the thread or interrupt
* handler that manages some kind of pointing hardware. Route that
* positional data to the appropriate window client.
*
****************************************************************************/
#ifdef CONFIG_NX_MOUSE
EXTERN int nxmu_mousein(FAR struct nxfe_state_s *fe,
FAR const struct nxgl_point_s *pos, int button);
#endif
/****************************************************************************
* Name: nxmu_kbdin
*
* Descripton:
* New keyboard data has been received from the thread or interrupt
* handler that manages some kind of keyboard/keypad hardware. Route that
* positional data to the appropriate window client.
*
****************************************************************************/
#ifdef CONFIG_NX_KBD
EXTERN void nxmu_kbdin(FAR struct nxfe_state_s *fe, uint8_t nch, FAR uint8_t *ch);
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __GRAPHICS_NXMU_NXFE_H */
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