source: mainline/uspace/srv/hid/display/ddev.c@ c79545e

/*
 * Copyright (c) 2019 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:
 *
 * - Redistributions 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 display device
 */

#include <adt/list.h>
#include <ddev.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include "display.h"
#include "ddev.h"

/** Open display device.
 *
 * @param display Parent display
 * @param svc_id Service ID
 * @param rddev Place to store pointer to new display device.
 * @return EOK on success, ENOMEM if out of memory
 */
errno_t ds_ddev_open(ds_display_t *display, service_id_t svc_id,
    ds_ddev_t **rddev)
{
        ds_ddev_t *ddev;
        gfx_context_t *gc;
        ddev_t *dd = NULL;
        char *name = NULL;
        errno_t rc;

        rc = loc_service_get_name(svc_id, &name);
        if (rc != EOK) {
                printf("Error resolving name of service %lu.\n",
                    (unsigned long) svc_id);
                return rc;
        }

        rc = ddev_open(name, &dd);
        if (rc != EOK) {
                printf("Error opening display device '%s'.\n", name);
                free(name);
                return rc;
        }

        rc = ddev_get_gc(dd, &gc);
        if (rc != EOK) {
                printf("Error getting device context for '%s'.\n", name);
                ddev_close(dd);
                free(name);
                return rc;
        }

        ddev = calloc(1, sizeof(ds_ddev_t));
        if (ddev == NULL) {
                free(name);
                ddev_close(dd);
                return ENOMEM;
        }

        ddev->svc_name = name;
        ddev->svc_id = svc_id;
        ddev->dd = dd;
        ddev->gc = gc;

        ds_display_add_ddev(display, ddev);

        rc = ds_display_paint_bg(display, NULL);
        if (rc != EOK)
                return rc;

        *rddev = ddev;
        return EOK;
}

/** Destroy display device.
 *
 * @param ddev Display device
 */
void ds_ddev_close(ds_ddev_t *ddev)
{
        ds_display_remove_ddev(ddev);
        free(ddev);
}

/** @}
 */