source: mainline/uspace/srv/hid/display/main.c@ f0cc1c64

/*
 * Copyright (c) 2025 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistribution1s of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup display
 * @{
 */
/**
 * @file Display server main
 */

#include <async.h>
#include <disp_srv.h>
#include <dispcfg_srv.h>
#include <errno.h>
#include <gfx/context.h>
#include <str_error.h>
#include <io/log.h>
#include <io/kbd_event.h>
#include <io/pos_event.h>
#include <ipc/services.h>
#include <ipcgfx/server.h>
#include <loc.h>
#include <stdio.h>
#include <task.h>
#include <wndmgt_srv.h>
#include "cfgclient.h"
#include "cfgops.h"
#include "client.h"
#include "display.h"
#include "dsops.h"
#include "ievent.h"
#include "input.h"
#include "main.h"
#include "output.h"
#include "seat.h"
#include "window.h"
#include "wmclient.h"
#include "wmops.h"

const char *cfg_file_path = "/w/cfg/display.sif";

static void display_client_conn(ipc_call_t *, void *);
static void display_client_ev_pending(void *);
static void display_wmclient_ev_pending(void *);
static void display_cfgclient_ev_pending(void *);
static void display_gc_conn(ipc_call_t *, void *);
static void display_wndmgt_conn(ipc_call_t *, void *);
static void display_dispcfg_conn(ipc_call_t *, void *);

#ifdef CONFIG_DISP_DOUBLE_BUF
/*
 * Double buffering is one way to provide flicker-free display.
 */
static ds_display_flags_t disp_flags = df_disp_double_buf;
#else
/*
 * With double buffering disabled, wet screen flicker since front-to-back
 * rendering is not implemented.
 */
static ds_display_flags_t disp_flags = df_none;
#endif

static ds_client_cb_t display_client_cb = {
        .ev_pending = display_client_ev_pending
};

static ds_wmclient_cb_t display_wmclient_cb = {
        .ev_pending = display_wmclient_ev_pending
};

static ds_cfgclient_cb_t display_cfgclient_cb = {
        .ev_pending = display_cfgclient_ev_pending
};

static void display_client_ev_pending(void *arg)
{
        display_srv_t *srv = (display_srv_t *) arg;

        display_srv_ev_pending(srv);
}

static void display_wmclient_ev_pending(void *arg)
{
        wndmgt_srv_t *srv = (wndmgt_srv_t *) arg;

        wndmgt_srv_ev_pending(srv);
}

static void display_cfgclient_ev_pending(void *arg)
{
        dispcfg_srv_t *srv = (dispcfg_srv_t *) arg;

        dispcfg_srv_ev_pending(srv);
}

/** Initialize display server */
static errno_t display_srv_init(ds_output_t **routput)
{
        ds_display_t *disp = NULL;
        ds_seat_t *seat = NULL;
        ds_output_t *output = NULL;
        gfx_context_t *gc = NULL;
        port_id_t port = 0;
        loc_srv_t *srv = NULL;
        service_id_t sid = 0;
        errno_t rc;

        log_msg(LOG_DEFAULT, LVL_DEBUG, "display_srv_init()");

        rc = ds_display_create(NULL, disp_flags, &disp);
        if (rc != EOK)
                goto error;

        rc = ds_display_load_cfg(disp, cfg_file_path);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_NOTE,
                    "Starting with fresh configuration.");

                /* Create first seat */
                rc = ds_seat_create(disp, "Alice", &seat);
                if (rc != EOK)
                        goto error;
        }

        rc = ds_output_create(&output);
        if (rc != EOK)
                goto error;

        output->def_display = disp;
        rc = ds_output_start_discovery(output);
        if (rc != EOK)
                goto error;

        rc = ds_ievent_init(disp);
        if (rc != EOK)
                goto error;

        rc = ds_input_open(disp);
        if (rc != EOK)
                goto error;

        rc = async_create_port(INTERFACE_DISPLAY, display_client_conn, disp,
            &port);
        if (rc != EOK)
                goto error;

        rc = async_port_create_interface(port, INTERFACE_GC, display_gc_conn,
            disp);
        if (rc != EOK)
                goto error;

        rc = async_port_create_interface(port, INTERFACE_WNDMGT,
            display_wndmgt_conn, disp);
        if (rc != EOK)
                goto error;

        rc = async_port_create_interface(port, INTERFACE_DISPCFG,
            display_dispcfg_conn, disp);
        if (rc != EOK)
                goto error;

        rc = loc_server_register(NAME, &srv);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering server: %s.", str_error(rc));
                rc = EEXIST;
                goto error;
        }

        rc = loc_service_register(srv, SERVICE_NAME_DISPLAY, port, &sid);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering service: %s.", str_error(rc));
                rc = EEXIST;
                goto error;
        }

        *routput = output;
        return EOK;
error:
        if (sid != 0)
                loc_service_unregister(srv, sid);
        if (srv != NULL)
                loc_server_unregister(srv);
        if (port != 0)
                async_port_destroy(port);
#if 0
        if (disp->input != NULL)
                ds_input_close(disp);
#endif
        ds_ievent_fini(disp);
        if (output != NULL)
                ds_output_destroy(output);
        if (gc != NULL)
                gfx_context_delete(gc);
        if (seat != NULL)
                ds_seat_destroy(seat);
        if (disp != NULL)
                ds_display_destroy(disp);
        return rc;
}

/** Handle client connection to display server */
static void display_client_conn(ipc_call_t *icall, void *arg)
{
        display_srv_t srv;
        sysarg_t svc_id;
        ds_client_t *client = NULL;
        ds_display_t *disp = (ds_display_t *) arg;
        errno_t rc;

        log_msg(LOG_DEFAULT, LVL_DEBUG, "display_client_conn arg1=%zu arg2=%zu arg3=%zu arg4=%zu.",
            ipc_get_arg1(icall), ipc_get_arg2(icall), ipc_get_arg3(icall),
            ipc_get_arg4(icall));

        svc_id = ipc_get_arg2(icall);

        if (svc_id != 0) {
                /* Create client object */
                ds_display_lock(disp);
                rc = ds_client_create(disp, &display_client_cb, &srv, &client);
                ds_display_unlock(disp);
                if (rc != EOK) {
                        async_answer_0(icall, ENOMEM);
                        return;
                }

                /* Set up protocol structure */
                display_srv_initialize(&srv);
                srv.ops = &display_srv_ops;
                srv.arg = client;

                /* Handle connection */
                display_conn(icall, &srv);

                ds_display_lock(disp);
                ds_client_destroy(client);
                ds_display_unlock(disp);
        }
}

/** Handle GC connection to display server */
static void display_gc_conn(ipc_call_t *icall, void *arg)
{
        sysarg_t wnd_id;
        ds_window_t *wnd;
        ds_display_t *disp = (ds_display_t *) arg;
        gfx_context_t *gc;

        log_msg(LOG_DEFAULT, LVL_DEBUG, "display_gc_conn arg1=%zu arg2=%zu arg3=%zu arg4=%zu.",
            ipc_get_arg1(icall), ipc_get_arg2(icall), ipc_get_arg3(icall),
            ipc_get_arg4(icall));

        wnd_id = ipc_get_arg3(icall);

        /* Window GC connection */

        wnd = ds_display_find_window(disp, wnd_id);
        if (wnd == NULL) {
                async_answer_0(icall, ENOENT);
                return;
        }

        /*
         * XXX We need a way to make sure that the connection does
         * not stay active after the window had been destroyed
         */
        gc = ds_window_get_ctx(wnd);
        gc_conn(icall, gc);
}

/** Handle window management connection to display server */
static void display_wndmgt_conn(ipc_call_t *icall, void *arg)
{
        ds_display_t *disp = (ds_display_t *) arg;
        errno_t rc;
        wndmgt_srv_t srv;
        ds_wmclient_t *wmclient = NULL;

        /* Create WM client object */
        ds_display_lock(disp);
        rc = ds_wmclient_create(disp, &display_wmclient_cb, &srv, &wmclient);
        ds_display_unlock(disp);
        if (rc != EOK) {
                async_answer_0(icall, ENOMEM);
                return;
        }

        /* Set up protocol structure */
        wndmgt_srv_initialize(&srv);
        srv.ops = &wndmgt_srv_ops;
        srv.arg = wmclient;

        /* Handle connection */
        wndmgt_conn(icall, &srv);

        ds_display_lock(disp);
        ds_wmclient_destroy(wmclient);
        ds_display_unlock(disp);
}

/** Handle configuration connection to display server */
static void display_dispcfg_conn(ipc_call_t *icall, void *arg)
{
        ds_display_t *disp = (ds_display_t *) arg;
        errno_t rc;
        dispcfg_srv_t srv;
        ds_cfgclient_t *cfgclient = NULL;

        /* Create CFG client object */
        ds_display_lock(disp);
        rc = ds_cfgclient_create(disp, &display_cfgclient_cb, &srv, &cfgclient);
        ds_display_unlock(disp);
        if (rc != EOK) {
                async_answer_0(icall, ENOMEM);
                return;
        }

        /* Set up protocol structure */
        dispcfg_srv_initialize(&srv);
        srv.ops = &dispcfg_srv_ops;
        srv.arg = cfgclient;

        /* Handle connection */
        dispcfg_conn(icall, &srv);

        ds_display_lock(disp);
        ds_cfgclient_destroy(cfgclient);
        ds_display_unlock(disp);
}

int main(int argc, char *argv[])
{
        errno_t rc;
        ds_output_t *output;

        printf("%s: Display server\n", NAME);

        if (log_init(NAME) != EOK) {
                printf(NAME ": Failed to initialize logging.\n");
                return 1;
        }

        rc = display_srv_init(&output);
        if (rc != EOK)
                return 1;

        printf(NAME ": Accepting connections.\n");
        task_retval(0);
        async_manager();

        return 0;
}

/** @}
 */