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/* autotrace.c --- Autotrace API
Copyright (C) 2000, 2001, 2002 Martin Weber
The author can be contacted at <martweb@gmx.net>
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "mallocvar.h"
#include "autotrace.h"
#include "exception.h"
#include "fit.h"
#include "bitmap.h"
#include "spline.h"
#include "image-header.h"
#include "image-proc.h"
#include "thin-image.h"
#define AT_DEFAULT_DPI 72
at_fitting_opts_type *
at_fitting_opts_new(void)
{
at_fitting_opts_type * opts;
MALLOCVAR_NOFAIL(opts);
return opts;
}
at_fitting_opts_type *
at_fitting_opts_copy (at_fitting_opts_type * original)
{
at_fitting_opts_type * new_opts;
if (original == NULL)
return NULL;
new_opts = at_fitting_opts_new ();
*new_opts = *original;
new_opts->backgroundSpec = original->backgroundSpec;
new_opts->background_color = original->background_color;
return new_opts;
}
void
at_fitting_opts_free(at_fitting_opts_type * opts)
{
free(opts);
}
at_output_opts_type *
at_output_opts_new(void)
{
at_output_opts_type * opts;
MALLOCVAR_NOFAIL(opts);
opts->dpi = AT_DEFAULT_DPI;
return opts;
}
at_output_opts_type *
at_output_opts_copy(at_output_opts_type * original)
{
at_output_opts_type * opts = at_output_opts_new();
*opts = *original;
return opts;
}
void
at_output_opts_free(at_output_opts_type * opts)
{
free(opts);
}
/* at_splines_new_full modifies its 'bitmap' argument
when it does the thin_image thing.
*/
at_spline_list_array_type *
at_splines_new_full(at_bitmap_type * const bitmap,
at_fitting_opts_type * const opts,
at_msg_func msg_func,
void * const msg_data,
at_progress_func notify_progress,
void * const progress_data,
at_testcancel_func test_cancel,
void * const testcancel_data) {
at_spline_list_array_type * retval;
image_header_type image_header;
pixel_outline_list_type pixelOutlineList;
at_exception_type exp;
distance_map_type distanceMap;
bool haveDistMap;
exp = at_exception_new(msg_func, msg_data);
image_header.width = at_bitmap_get_width(bitmap);
image_header.height = at_bitmap_get_height(bitmap);
if (opts->centerline) {
if (opts->preserve_width) {
/* Preserve line width prior to thinning. */
bool const paddedTrue = true;
distanceMap = new_distance_map(*bitmap, 255, paddedTrue, &exp);
haveDistMap = true;
} else
haveDistMap = false;
thin_image(bitmap, opts->backgroundSpec, opts->background_color, &exp);
} else
haveDistMap = false;
if (at_exception_got_fatal(&exp))
retval = NULL;
else {
if (opts->centerline) {
pixel background_color;
if (opts->backgroundSpec)
background_color = opts->background_color;
else
PPM_ASSIGN(background_color, 255, 255, 255);
pixelOutlineList =
find_centerline_pixels(*bitmap, background_color,
notify_progress, progress_data,
test_cancel, testcancel_data, &exp);
} else
pixelOutlineList =
find_outline_pixels(*bitmap,
opts->backgroundSpec,
opts->background_color,
notify_progress, progress_data,
test_cancel, testcancel_data, &exp);
if (at_exception_got_fatal(&exp) ||
(test_cancel && test_cancel(testcancel_data)))
retval = NULL;
else {
at_spline_list_array_type * splinesP;
MALLOCVAR_NOFAIL(splinesP);
fit_outlines_to_splines(pixelOutlineList, opts,
haveDistMap ? &distanceMap : NULL,
image_header.width,
image_header.height,
&exp,
notify_progress, progress_data,
test_cancel, testcancel_data,
splinesP);
if (at_exception_got_fatal(&exp) ||
(test_cancel && test_cancel(testcancel_data)))
retval = NULL;
else {
if (notify_progress)
notify_progress(1.0, progress_data);
retval = splinesP;
}
free_pixel_outline_list(&pixelOutlineList);
}
if (haveDistMap)
free_distance_map(&distanceMap);
}
return retval;
}
void
at_splines_write(at_output_write_func outputWriter,
FILE * const writeto,
at_output_opts_type * const optsArg,
at_spline_list_array_type * const splinesP,
at_msg_func msgFunc,
void * const msgData) {
at_output_opts_type * optsP;
bool newOpts;
int llx, lly, urx, ury;
llx = 0;
lly = 0;
urx = splinesP->width;
ury = splinesP->height;
if (optsArg == NULL) {
newOpts = true;
optsP = at_output_opts_new();
} else {
newOpts = false;
optsP = optsArg;
}
(*outputWriter)(writeto, "DUMMYFILENAME",
llx, lly, urx, ury, optsP, *splinesP,
msgFunc, msgData);
if (newOpts)
at_output_opts_free(optsP);
}
void
at_splines_free(at_spline_list_array_type * const splines) {
free_spline_list_array(splines);
free(splines);
}
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