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charcanvas.c

/*
 *  charcanvas.c - Canvas for character-oriented devices.
 *                 This file is part of the FreeLCD package.
 *  
 *  $Id: charcanvas_8c-source.html,v 1.1 2003/02/16 22:50:41 unicorn Exp $
 *
 *  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 of the License, 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
 *
 *  Copyright (c) 2002, 2003, Jeroen van den Berg <unicorn@hippie.nu>
 */

#include <stdlib.h>
#include <unicode.h>

#include <common/xmalloc.h>
#include "charcanvas.h"

/*---------------------------------------------------- cc_create_canvas --*/
cc_canvas *
cc_create_canvas (unsigned int width, unsigned int height)
{
  size_t i;
  size_t size = width * height;
  cc_elem *element;
  cc_canvas *new = xmalloc (sizeof (cc_canvas));
   
  new->width = width;
  new->height = height;
  new->elements = xmalloc (size * sizeof (cc_elem));
  element = new->elements;
  
  for (i = 0; i < size; ++i, ++element)
    {
      element->c = L' ';
      element->damaged_flag = 0;
      element->bitmap = 0;
    }
  
  return new;
}

/*---------------------------------------------------- cc_delete_canvas --*/
void
cc_delete_canvas (cc_canvas *canvas)
{
  int i;
  int size = canvas->width * canvas->height;
  cc_elem *element = canvas->elements;
  
  for (i = 0; i < size; ++i, ++element)
    free (element->bitmap);

  free (canvas->elements);
  free (canvas);
}

/*--------------------------------------------------------- cc_put_char --*/
void
cc_put_char (cc_canvas *canvas, unsigned int x_pos, unsigned int y_pos, 
             wchar_t character)
{
  cc_elem *element = cc_get_element (canvas, x_pos, y_pos);
  element->c = character;
  element->damaged_flag = 1;
}

/*------------------------------------------------------- cc_write_text --*/
void
cc_write_text (cc_canvas *canvas, unsigned int x_pos, unsigned int y_pos,
               char *utf8_string)
{
  /* FIXME */
}

/*------------------------------------------------------ cc_get_element --*/
cc_elem*
cc_get_element (cc_canvas *canvas, unsigned int x_pos, unsigned int y_pos)
{
  return canvas->elements + x_pos + y_pos * canvas->width;
}

/*-------------------------------------------- cc_clear_damaged_regions --*/
void
cc_clear_damaged_regions (cc_canvas *canvas)
{
  size_t i;
  size_t size = canvas->width * canvas->height;
  cc_elem *element = canvas->elements;
  
  for (i = 0; i < size; ++i, ++element)
    element->damaged_flag = 0;

  free (canvas->elements);
  free (canvas);
}

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