@c -*- mode: Noweb; noweb-doc-mode: texinfo-mode; noweb-code-mode: c-mode -*-

@node File o_image.c,,,Top
@chapter File @file{o_image.c}

@section File header

@format
@anchor{o_image.c - -root-}
@i{<<o_image.c : *>>=}@t{
@i{<<o_image.c : copyright and license -- @ref{o_image.c - copyright and license}>>}

/* DO NOT read or edit this file ! Use ../noweb/o_image.nw instead */

@i{<<o_image.c : include directives -- @ref{o_image.c - include directives}>>}
@i{<<o_image.c : global variables -- @ref{o_image.c - global variables}>>}
@i{<<o_image.c : o_image_init() -- @ref{o_image.c - o_image_init()}>>}
@i{<<o_image.c : o_image_create() -- @ref{o_image.c - o_image_create()}>>}
@i{<<o_image.c : o_image_close() -- @ref{o_image.c - o_image_close()}>>}
@i{<<o_image.c : o_image_write() -- @ref{o_image.c - o_image_write()}>>}
@i{<<o_image.c : o_image_geda2gd_color() -- @ref{o_image.c - o_image_geda2gd_color()}>>}

}
@end format




@format
@anchor{o_image.c - copyright and license}
@i{<<o_image.c : copyright and license>>=}@t{
/* gEDA - GPL Electronic Design Automation
 * libgeda - gEDA's library
 * Copyright (C) 1998-2000 Ales V. Hvezda
 *
 * 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 USA
 */

}
@end format




@format
@anchor{o_image.c - include directives}
@i{<<o_image.c : include directives>>=}@t{
#include <config.h>

#include <stdio.h>

#include <gtk/gtk.h>
#include <libguile.h>

#ifdef HAS_LIBGDGEDA
#include <gdgeda/gd.h>
#endif

#include "defines.h"
#include "struct.h"
#include "globals.h"
#include "o_types.h"
#include "funcs.h"
#include "colors.h"

#include "../include/prototype.h"

#ifdef HAVE_LIBDMALLOC
#include <dmalloc.h>
#endif

@display
@r{Uses :
@t{colors},  -- @ref{o_image.c - global variables}.
}
@end display
}
@end format




@format
@anchor{o_image.c - global variables}
@i{<<o_image.c : global variables>>=}@t{
int image_black;
int image_white;
#if 0
int image_red;
int image_green;
int image_blue;
int image_yellow;
int image_cyan;
int image_grey;
#endif

#ifdef HAS_LIBGDGEDA

extern COLOR colors[MAX_COLORS];

gdImagePtr current_im_ptr;

@display
@r{Defines :
@t{colors},
 -- @ref{o_image.c - include directives},
 -- @ref{o_image.c - o_image_create()}.
@t{current_im_ptr},
 -- @ref{o_image.c - o_image_close()},
 -- @ref{o_image.c - o_image_create()},
 -- @ref{o_image.c - o_image_write()}.
.
@t{image},
 -- @ref{o_image.c - o_image_write()}.
@t{image_black},
 -- @ref{o_image.c - o_image_create()}.
@t{image_blue},
 -- @ref{o_image.c - o_image_create()}.
@t{image_green},
 -- @ref{o_image.c - o_image_create()}.
.
@t{image_red},
 -- @ref{o_image.c - o_image_create()}.
@t{image_white},
 -- @ref{o_image.c - o_image_create()}.
.
}
@end display
}
@end format



@section Function @code{o_image_init()}

@defun o_image_init
@end defun

@format
@anchor{o_image.c - o_image_init()}
@i{<<o_image.c : o_image_init()>>=}@t{
void
o_image_init(void)
@{

@}

@display
@r{Defines :
.
}
@end display
}
@end format



@section Function @code{o_image_create()}

@defun o_image_create x y color_mode
@end defun

@format
@anchor{o_image.c - o_image_create()}
@i{<<o_image.c : o_image_create()>>=}@t{
/* background color ? */
void
o_image_create(int x, int y, int color_mode)
@{
  gdImagePtr im_ptr;

  im_ptr = gdImageCreate(x, y);

  if (color_mode == TRUE) @{
    /* You can change the background color which is outputed */
    if (colors[BACKGROUND_COLOR].image_red != -1 && 
        colors[BACKGROUND_COLOR].image_green != -1 &&
        colors[BACKGROUND_COLOR].image_blue != -1) @{
      image_black = gdImageColorAllocate(im_ptr, 
                                         colors[BACKGROUND_COLOR].image_red,
                                         colors[BACKGROUND_COLOR].image_green,
                                         colors[BACKGROUND_COLOR].image_blue);
    @} else @{
      image_black = gdImageColorAllocate(im_ptr, 0, 0, 0);
    @}
    image_white = gdImageColorAllocate(im_ptr, 255, 255, 255);
  @} else @{
    /* set the background to white */
    image_white = gdImageColorAllocate(im_ptr, 255, 255, 255);
    image_black = gdImageColorAllocate(im_ptr, 0, 0, 0);
  @}

  current_im_ptr = im_ptr;

  s_color_gdcolor_init();
@}

@display
@r{Defines :
.
}
@end display
@display
@r{Uses :
@t{colors},  -- @ref{o_image.c - global variables}.
@t{current_im_ptr},  -- @ref{o_image.c - global variables}.
@t{image_black},  -- @ref{o_image.c - global variables}.
@t{image_blue},  -- @ref{o_image.c - global variables}.
@t{image_green},  -- @ref{o_image.c - global variables}.
@t{image_red},  -- @ref{o_image.c - global variables}.
@t{image_white},  -- @ref{o_image.c - global variables}.
}
@end display
}
@end format



@section Function @code{o_image_close()}

@defun o_image_close
@end defun

@format
@anchor{o_image.c - o_image_close()}
@i{<<o_image.c : o_image_close()>>=}@t{
void
o_image_close(void)
@{
  gdImageDestroy(current_im_ptr);
@}

@display
@r{Defines :
.
}
@end display
@display
@r{Uses :
@t{current_im_ptr},  -- @ref{o_image.c - global variables}.
}
@end display
}
@end format



@section Function @code{o_image_write()}

@defun o_image_write filename
@end defun

@format
@anchor{o_image.c - o_image_write()}
@i{<<o_image.c : o_image_write()>>=}@t{
int
o_image_write(const char *filename)
@{
  FILE *out;

  if (filename == NULL) @{
    return(-1);
  @}

  gdImageInterlace(current_im_ptr, 1);

  out = fopen(filename, "wb");

  if (out == NULL) @{
    s_log_message("Could not open [%s] for image writting\n", filename);
    return(-1);
  @}

  gdImagePng(current_im_ptr, out);

  fclose(out);
  return(0);
@}
#endif

@display
@r{Defines :
.
}
@end display
@display
@r{Uses :
@t{current_im_ptr},  -- @ref{o_image.c - global variables}.
@t{image},  -- @ref{o_image.c - global variables}.
}
@end display
}
@end format



@section Function @code{o_image_geda2gd_color()}

@defun o_image_geda2gd_color color
@end defun

@format
@anchor{o_image.c - o_image_geda2gd_color()}
@i{<<o_image.c : o_image_geda2gd_color()>>=}@t{
/* this can stay in even if libgdgeda doesn't exist */
int
o_image_geda2gd_color(int color) 
@{
  int value;
  value = s_color_image_int(color);
  return(value);
@}

@display
@r{Defines :
.
}
@end display
}
@end format