source: mainline/uspace/srv/hid/display/output.c@ 24cf391a

/*
 * 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 output
 */

#include <errno.h>
#include <gfx/context.h>
#include <guigfx/canvas.h>
#include <io/kbd_event.h>
#include <io/pos_event.h>
#include <stdio.h>
#include <stdlib.h>
#include <window.h>
#include "output.h"

static void (*kbd_ev_handler)(void *, kbd_event_t *);
static void *kbd_ev_arg;
static void (*pos_ev_handler)(void *, pos_event_t *);
static void *pos_ev_arg;

static void on_keyboard_event(widget_t *widget, void *data)
{
        printf("Keyboard event\n");
        kbd_ev_handler(kbd_ev_arg, (kbd_event_t *) data);
}

static void on_position_event(widget_t *widget, void *data)
{
        pos_ev_handler(pos_ev_arg, (pos_event_t *) data);
}

errno_t output_init(void (*kbd_event_handler)(void *, kbd_event_t *),
    void *karg, void (*pos_event_handler)(void *, pos_event_t *),
    void *parg, gfx_context_t **rgc)
{
        canvas_gc_t *cgc = NULL;
        window_t *window = NULL;
        pixel_t *pixbuf = NULL;
        surface_t *surface = NULL;
        canvas_t *canvas = NULL;
        gfx_coord_t vw, vh;
        errno_t rc;

        printf("Init canvas..\n");
        kbd_ev_handler = kbd_event_handler;
        kbd_ev_arg = karg;

        pos_ev_handler = pos_event_handler;
        pos_ev_arg = parg;

        window = window_open("comp:0/winreg", NULL,
            WINDOW_MAIN | WINDOW_DECORATED, "Display Server");
        if (window == NULL) {
                printf("Error creating window.\n");
                return -1;
        }

        vw = 800;
        vh = 600;

        pixbuf = calloc(vw * vh, sizeof(pixel_t));
        if (pixbuf == NULL) {
                printf("Error allocating memory for pixel buffer.\n");
                return ENOMEM;
        }

        surface = surface_create(vw, vh, pixbuf, 0);
        if (surface == NULL) {
                printf("Error creating surface.\n");
                return EIO;
        }

        canvas = create_canvas(window_root(window), NULL, vw, vh,
            surface);
        if (canvas == NULL) {
                printf("Error creating canvas.\n");
                return EIO;
        }

        sig_connect(&canvas->keyboard_event, NULL, on_keyboard_event);
        sig_connect(&canvas->position_event, NULL, on_position_event);

        window_resize(window, 0, 0, vw + 10, vh + 30, WINDOW_PLACEMENT_ANY);
        window_exec(window);

        printf("Create canvas GC\n");
        rc = canvas_gc_create(canvas, surface, &cgc);
        if (rc != EOK)
                return rc;

        *rgc = canvas_gc_get_ctx(cgc);
        return EOK;
}

/** @}
 */