nuttx/examples/nx/nx_main.c

/****************************************************************************
 * examples/nx/nx_main.c
 *
 *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * 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.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/fb.h>
#include <nuttx/arch.h>
#include <nuttx/nx.h>
#include "nx_internal.h"

/****************************************************************************
 * Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Types
 ****************************************************************************/

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Private Data
 ****************************************************************************/

static int g_exitcode = NXEXIT_SUCCESS;

/****************************************************************************
 * Public Data
 ****************************************************************************/

/* The connecton handler */

NXHANDLE g_hnx = NULL;

/* The screen resolution */

nxgl_coord_t g_xres;
nxgl_coord_t g_yres;

boolean b_haveresolution = FALSE;
#ifdef CONFIG_NX_MULTIUSER
boolean g_connected = FALSE;
#endif
sem_t g_semevent = {0};

/* Colors used to fill window 1 & 2 */

nxgl_mxpixel_t g_color1[CONFIG_NX_NPLANES];
nxgl_mxpixel_t g_color2[CONFIG_NX_NPLANES];

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nxeg_drivemouse
 ****************************************************************************/

#ifdef CONFIG_NX_MOUSE
static void nxeg_drivemouse(void)
{
  nxgl_coord_t x;
  nxgl_coord_t y;
  nxgl_coord_t xstep = g_xres / 8;
  nxgl_coord_t ystep = g_yres / 8;

  for (x = 0; x < g_xres; x += xstep)
    {
      for (y = 0; y < g_yres; y += ystep)
        {
          message("nxeg_drivemouse: Mouse left button at (%d,%d)\n", x, y);
          (void)nx_mousein(g_hnx, x, y, NX_MOUSE_LEFTBUTTON);
        }
    }
}
#endif

/****************************************************************************
 * Name: nxeg_suinitialize
 ****************************************************************************/

#ifndef CONFIG_NX_MULTIUSER
static inline int nxeg_suinitialize(void)
{
  FAR struct fb_vtable_s *fb;
  int ret;

  /* Initialize the frame buffer device */

  message("nxeg_initialize: Initializing framebuffer\n");
  ret = up_fbinitialize();
  if (ret < 0)
    {
      message("nxeg_initialize: up_fbinitialize failed: %d\n", -ret);
      g_exitcode = NXEXIT_FBINITIALIZE;
      return ERROR;
    }

  fb = up_fbgetvplane(CONFIG_EXAMPLES_NX_VPLANE);
  if (!fb)
    {
      message("nxeg_initialize: up_fbgetvplane failed, vplane=%d\n", CONFIG_EXAMPLES_NX_VPLANE);
      g_exitcode = NXEXIT_FBGETVPLANE;
      return ERROR;
    }

  /* Then open NX */

  message("nxeg_initialize: Open NX\n");
  g_hnx = nx_open(fb);
  if (!g_hnx)
    {
      message("user_start: nx_open failed: %d\n", errno);
      g_exitcode = NXEXIT_NXOPEN;
      return ERROR;
    }
  return OK;
}
#endif

/****************************************************************************
 * Name: nxeg_initialize
 ****************************************************************************/

#ifdef CONFIG_NX_MULTIUSER
static inline int nxeg_muinitialize(void)
{
  struct sched_param param;
  pthread_t thread;
  pid_t servrid;
  int ret;

  /* Set the client task priority */

  param.sched_priority = CONFIG_EXAMPLES_NX_CLIENTPRIO;
  ret = sched_setparam(0, &param);
  if (ret < 0)
    {
      message("nxeg_initialize: sched_setparam failed: %d\n" , ret);
      g_exitcode = NXEXIT_SCHEDSETPARAM;
      return ERROR;
    }

  /* Start the server task */

  message("nxeg_initialize: Starting nx_servertask task\n");
  servrid = task_create("NX Server", CONFIG_EXAMPLES_NX_SERVERPRIO,
                        CONFIG_EXAMPLES_NX_STACKSIZE, nx_servertask, NULL);
  if (servrid < 0)
    {
      message("nxeg_initialize: Failed to create nx_servertask task: %d\n", errno);
      g_exitcode = NXEXIT_TASKCREATE;
      return ERROR;
    }

  /* Wait a bit to let the server get started */

  sleep(1);

  /* Connect to the server */

  g_hnx = nx_connect();
  if (g_hnx)
    {
       pthread_attr_t attr;

       /* Start a separate thread to listen for server events.  This is probably
        * the least efficient way to do this, but it makes this example flow more
        * smoothly.
        */

       (void)pthread_attr_init(&attr);
       param.sched_priority = CONFIG_EXAMPLES_NX_LISTENERPRIO;
       (void)pthread_attr_setschedparam(&attr, &param);
       (void)pthread_attr_setstacksize(&attr, CONFIG_EXAMPLES_NX_STACKSIZE);

       ret = pthread_create(&thread, &attr, nx_listenerthread, NULL);
       if (ret != 0)
         {
            printf("nxeg_initialize: pthread_create failed: %d\n", ret);
            g_exitcode = NXEXIT_PTHREADCREATE;
            return ERROR;
         }

       /* Don't return until we are connected to the server */

       while (!g_connected)
         {
           /* Wait for the listener thread to wake us up when we really
            * are connected.
            */

           (void)sem_wait(&g_semevent);
         }
    }
  else
    {
      message("nxeg_initialize: nx_connect failed: %d\n", errno);
      g_exitcode = NXEXIT_NXCONNECT;
      return ERROR;
    }
  return OK;
}
#endif

/****************************************************************************
 * Name: nxeg_initialize
 ****************************************************************************/

static int nxeg_initialize(void)
{
  int i;

  /* Initialize window colors */

  for (i = 0; i < CONFIG_NX_NPLANES; i++)
    {
      g_color1[i] = CONFIG_EXAMPLES_NX_COLOR1;
      g_color2[i] = CONFIG_EXAMPLES_NX_COLOR2;
    }

#ifdef CONFIG_NX_MULTIUSER
  return nxeg_muinitialize();
#else
  return nxeg_suinitialize();
#endif
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: user_initialize
 ****************************************************************************/

void user_initialize(void)
{
}

/****************************************************************************
 * Name: user_start
 ****************************************************************************/

int user_start(int argc, char *argv[])
{
  NXWINDOW hwnd1;
  NXWINDOW hwnd2;
  struct nxgl_size_s size;
  struct nxgl_point_s pt;
  nxgl_mxpixel_t color;
  int ret;

  /* Initialize */

  ret = nxeg_initialize();
  message("user_start: NX handle=%p\n", g_hnx);
  if (!g_hnx || ret < 0)
    {
      message("user_start: Failed to get NX handle: %d\n", errno);
      g_exitcode = NXEXIT_NXOPEN;
      goto errout;
    }

  /* Set the background to the configured background color */

  message("user_start: Set background color=%d\n", CONFIG_EXAMPLES_NX_BGCOLOR);
  color = CONFIG_EXAMPLES_NX_BGCOLOR;
  ret = nx_setbgcolor(g_hnx, &color);
  if (ret < 0)
    {
      message("user_start: nx_setbgcolor failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETBGCOLOR;
      goto errout_with_nx;
    }

  /* Create window #1 */

  message("user_start: Create window #1\n");
  hwnd1 = nx_openwindow(g_hnx, &g_nxcb1, (FAR void *)1);
  message("user_start: hwnd1=%p\n", hwnd1);

  if (!hwnd1)
    {
      message("user_start: nx_openwindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXOPENWINDOW;
      goto errout_with_nx;
    }

  /* Wait until we have the screen resolution */

  while (!b_haveresolution)
    {
      (void)sem_wait(&g_semevent);
    }
  message("user_start: Screen resolution (%d,%d)\n", g_xres, g_yres);

  /* Set the size of the window 1 */

  size.w = g_xres / 2;
  size.h = g_yres / 2;

  message("user_start: Set hwnd1 size to (%d,%d)\n", size.w, size.h);
  ret = nx_setsize(hwnd1, &size);
  if (ret < 0)
    {
      message("user_start: nx_setsize failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETSIZE;
      goto errout_with_hwnd1;
    }

  /* Sleep a bit -- both so that we can see the result of the above operations
   * but also, in the multi-user case, so that the server can get a chance to
   * actually do them!
   */

  message("user_start: Sleeping\n\n");
  sleep(1);

  /* Set the position of window #1 */

  pt.x = g_xres / 8;
  pt.y = g_yres / 8;

  message("user_start: Set hwnd1 postion to (%d,%d)\n", pt.x, pt.y);
  ret = nx_setposition(hwnd1, &pt);
  if (ret < 0)
    {
      message("user_start: nx_setposition failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETPOSITION;
      goto errout_with_hwnd1;
    }

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(2);

  /* Create window #2 */

  message("user_start: Create window #2\n");
  hwnd2 = nx_openwindow(g_hnx, &g_nxcb2, (FAR void *)2);
  message("user_start: hwnd2=%p\n", hwnd2);

  if (!hwnd2)
    {
      message("user_start: nx_openwindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXOPENWINDOW;
      goto errout_with_hwnd1;
    }

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(1);

  /* Set the size of the window 2 == size of window 1*/

  message("user_start: Set hwnd2 size to (%d,%d)\n", size.w, size.h);
  ret = nx_setsize(hwnd2, &size);
  if (ret < 0)
    {
      message("user_start: nx_setsize failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETSIZE;
      goto errout_with_hwnd2;
    }

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(1);

  /* Set the position of window #2 */

  pt.x = g_xres - size.w - pt.x;
  pt.y = g_yres - size.h - pt.y;

  message("user_start: Set hwnd2 postion to (%d,%d)\n", pt.x, pt.y);
  ret = nx_setposition(hwnd2, &pt);
  if (ret < 0)
    {
      message("user_start: nx_setposition failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETPOSITION;
      goto errout_with_hwnd2;
    }

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(2);

  /* Lower window 2 */

  message("user_start: Lower window #2\n");
  ret = nx_lower(hwnd2);
  if (ret < 0)
    {
      message("user_start: nx_lower failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETPOSITION;
      goto errout_with_hwnd2;
    }

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(1);

  /* Put mouse left-button clicks all over the screen and see who responds */

#ifdef CONFIG_NX_MOUSE
  nxeg_drivemouse();

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(1);
#endif

  /* Raise window 2 */

  message("user_start: Raise window #2\n");
  ret = nx_raise(hwnd2);
  if (ret < 0)
    {
      message("user_start: nx_raise failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETPOSITION;
      goto errout_with_hwnd2;
    }

  /* Put mouse left-button clicks all over the screen and see who responds */

#ifdef CONFIG_NX_MOUSE
  nxeg_drivemouse();
#endif

  /* Sleep a bit */

  message("user_start: Sleeping\n\n");
  sleep(2);

  /* Close the window 2 */

errout_with_hwnd2:
  message("user_start: Close window\n");
  ret = nx_closewindow(hwnd2);
  if (ret < 0)
    {
      message("user_start: nx_openwindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXCLOSEWINDOW;
      goto errout_with_nx;
    }

  /* Close the window1 */

errout_with_hwnd1:
  message("user_start: Close window\n");
  ret = nx_closewindow(hwnd1);
  if (ret < 0)
    {
      message("user_start: nx_openwindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXCLOSEWINDOW;
      goto errout_with_nx;
    }

errout_with_nx:
#ifdef CONFIG_NX_MULTIUSER
  /* Disconnect from the server */

  message("user_start: Disconnect from the server\n");
  nx_disconnect(g_hnx);
#else
  /* Close the server */

  message("user_start: Close NX\n");
  nx_close(g_hnx);
#endif
errout:
  return g_exitcode;
}