/* ply-pixel-display.c - APIs for putting up a pixel
 *
 * Copyright (C) 2009 Red Hat, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * Written by: Ray Strode <rstrode@redhat.com>
 */
#include "config.h"
#include "ply-pixel-display.h"

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <termios.h>
#include <unistd.h>

#include "ply-event-loop.h"
#include "ply-list.h"
#include "ply-logger.h"
#include "ply-pixel-buffer.h"
#include "ply-renderer.h"
#include "ply-utils.h"

struct _ply_pixel_display
{
        ply_event_loop_t                *loop;

        ply_renderer_t                  *renderer;
        ply_renderer_head_t             *head;

        unsigned long                    width;
        unsigned long                    height;
        int                              device_scale;

        ply_pixel_display_draw_handler_t draw_handler;
        void                            *draw_handler_user_data;

        int                              pause_count;
};

ply_pixel_display_t *
ply_pixel_display_new (ply_renderer_t      *renderer,
                       ply_renderer_head_t *head)
{
        ply_pixel_display_t *display;
        ply_pixel_buffer_t *pixel_buffer;
        ply_rectangle_t size;

        display = calloc (1, sizeof(ply_pixel_display_t));

        display->loop = ply_event_loop_get_default ();
        display->renderer = renderer;
        display->head = head;

        pixel_buffer = ply_renderer_get_buffer_for_head (renderer, head);
        ply_pixel_buffer_get_size (pixel_buffer, &size);

        display->width = size.width;
        display->height = size.height;
        display->device_scale = ply_pixel_buffer_get_device_scale (pixel_buffer);

        return display;
}

ply_renderer_t *
ply_pixel_display_get_renderer (ply_pixel_display_t *display)
{
        return display->renderer;
}

ply_renderer_head_t *
ply_pixel_display_get_renderer_head (ply_pixel_display_t *display)
{
        return display->head;
}

unsigned long
ply_pixel_display_get_width (ply_pixel_display_t *display)
{
        return display->width;
}

unsigned long
ply_pixel_display_get_height (ply_pixel_display_t *display)
{
        return display->height;
}

int
ply_pixel_display_get_device_scale (ply_pixel_display_t *display)
{
        return display->device_scale;
}

static void
ply_pixel_display_flush (ply_pixel_display_t *display)
{
        if (display->pause_count > 0)
                return;

        ply_renderer_flush_head (display->renderer, display->head);
}

void
ply_pixel_display_pause_updates (ply_pixel_display_t *display)
{
        assert (display != NULL);

        display->pause_count++;
}

void
ply_pixel_display_unpause_updates (ply_pixel_display_t *display)
{
        assert (display != NULL);

        display->pause_count--;

        ply_pixel_display_flush (display);
}

void
ply_pixel_display_draw_area (ply_pixel_display_t *display,
                             int                  x,
                             int                  y,
                             int                  width,
                             int                  height)
{
        ply_pixel_buffer_t *pixel_buffer;

        pixel_buffer = ply_renderer_get_buffer_for_head (display->renderer,
                                                         display->head);

        if (display->draw_handler != NULL) {
                ply_rectangle_t clip_area;

                clip_area.x = x;
                clip_area.y = y;
                clip_area.width = width;
                clip_area.height = height;
                ply_pixel_buffer_push_clip_area (pixel_buffer, &clip_area);
                display->draw_handler (display->draw_handler_user_data,
                                       pixel_buffer,
                                       x, y, width, height, display);
                ply_pixel_buffer_pop_clip_area (pixel_buffer);
        }

        ply_pixel_display_flush (display);
}

void
ply_pixel_display_free (ply_pixel_display_t *display)
{
        if (display == NULL)
                return;

        free (display);
}

void
ply_pixel_display_set_draw_handler (ply_pixel_display_t             *display,
                                    ply_pixel_display_draw_handler_t draw_handler,
                                    void                            *user_data)
{
        assert (display != NULL);

        display->draw_handler = draw_handler;
        display->draw_handler_user_data = user_data;
}

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