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gimp/app/path.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1999 Andy Thomas alt@picnic.demon.co.uk
*
* 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.
* Some of this code is based on the layers_dialog box code.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "apptypes.h"
#include "gdisplay.h"
#include "gimpimage.h"
#include "path.h"
#include "pathP.h"
#include "paths_dialog.h"
#include "tools/bezier_selectP.h"
static gchar * unique_name (GimpImage *gimage,
gchar *cstr);
Path *
path_new (GimpImage *gimage,
PathType ptype,
GSList *path_details,
gint closed,
gint state,
gint locked,
gint tattoo,
gchar *name)
{
gchar *suniq;
Path *path = g_new0 (Path, 1);
suniq = unique_name (gimage, name);
if (suniq)
path->name = suniq;
else
path->name = g_strdup (name);
path->path_details = path_details;
path->closed = closed;
path->state = state;
path->locked = locked;
path->pathtype = ptype;
if(tattoo)
path->tattoo = tattoo;
else
path->tattoo = gimp_image_get_new_tattoo (gimage);
return path;
}
Path *
path_copy (GimpImage *gimage,
Path *path)
{
Path *p_copy = g_new0 (Path, 1);
gchar *name;
name = unique_name (gimage, path->name);
if (name)
p_copy->name = name;
else
p_copy->name = g_strdup (path->name);
p_copy->closed = path->closed;
p_copy->state = path->state;
p_copy->pathtype = path->pathtype;
p_copy->path_details = pathpoints_copy (path->path_details);
if (gimage)
p_copy->tattoo = gimp_image_get_new_tattoo (gimage);
else
p_copy->tattoo = path->tattoo;
return p_copy;
}
void
path_free (Path *path)
{
g_return_if_fail (path != NULL);
g_free (path->name);
pathpoints_free (path->path_details);
g_free (path);
}
PathPoint *
path_point_new (guint type,
gdouble x,
gdouble y)
{
PathPoint *pathpoint = g_new0 (PathPoint,1);
pathpoint->type = type;
pathpoint->x = x;
pathpoint->y = y;
return pathpoint;
}
void
path_point_free (PathPoint *pathpoint)
{
g_free (pathpoint);
}
void
path_stroke (GimpImage *gimage,
PathList *pl,
Path *bzp)
{
BezierSelect *bezier_sel;
GDisplay *gdisp;
gdisp = gdisplays_check_valid (pl->gdisp, gimage);
bezier_sel = path_to_beziersel (bzp);
bezier_stroke (bezier_sel, gdisp, SUBDIVIDE, !bzp->closed);
bezier_select_free (bezier_sel);
}
gint
path_distance (Path *bzp,
gdouble dist,
gint *x,
gint *y,
gdouble *grad)
{
gint ret;
BezierSelect *bezier_sel;
bezier_sel = path_to_beziersel (bzp);
ret = bezier_distance_along (bezier_sel, !bzp->closed, dist, x, y, grad);
bezier_select_free (bezier_sel);
return ret;
}
Tattoo
path_get_tattoo (Path* p)
{
if (!p)
{
g_warning ("path_get_tattoo: invalid path");
return 0;
}
return p->tattoo;
}
Path*
path_get_path_by_tattoo (GimpImage *gimage,
Tattoo tattoo)
{
GSList *tlist;
PathList *plp;
if (!gimage || !tattoo)
return NULL;
/* Go around the list and check all tattoos. */
/* Get path structure */
plp = (PathList*) gimp_image_get_paths (gimage);
if (!plp)
return (NULL);
for (tlist = plp->bz_paths; tlist; tlist = g_slist_next(tlist))
{
Path* p = (Path*)(tlist->data);
if (p->tattoo == tattoo)
return (p);
}
return (NULL);
}
PathList *
path_list_new (GimpImage *gimage,
gint last_selected_row,
GSList *bz_paths)
{
PathList *pip = g_new0 (PathList, 1);
pip->gimage = gimage;
pip->last_selected_row = last_selected_row;
/* add connector to image delete/destroy */
pip->sig_id = gtk_signal_connect (GTK_OBJECT (gimage),
"destroy",
GTK_SIGNAL_FUNC (paths_dialog_destroy_cb),
pip);
pip->bz_paths = bz_paths;
return (PathList *) pip;
}
void
path_list_free (PathList* iml)
{
g_return_if_fail (iml != NULL);
if (iml->bz_paths)
{
g_slist_foreach (iml->bz_paths, (GFunc) path_free, NULL);
g_slist_free (iml->bz_paths);
}
g_free (iml);
}
BezierSelect *
path_to_beziersel (Path *bzp)
{
BezierSelect *bezier_sel;
BezierPoint *bpnt = NULL;
GSList *list;
if (!bzp)
g_warning ("path_to_beziersel: NULL bzp");
list = bzp->path_details;
bezier_sel = g_new0 (BezierSelect, 1);
bezier_sel->num_points = 0;
bezier_sel->mask = NULL;
bezier_sel->core = NULL; /* not required will be reset in bezier code */
bezier_select_reset (bezier_sel);
bezier_sel->closed = bzp->closed;
/* bezier_sel->state = BEZIER_ADD; */
bezier_sel->state = bzp->state;
while (list)
{
PathPoint *pdata;
pdata = (PathPoint *) list->data;
if (pdata->type == BEZIER_MOVE)
{
bezier_sel->last_point->next = bpnt;
bpnt->prev = bezier_sel->last_point;
bezier_sel->cur_anchor = NULL;
bezier_sel->cur_control = NULL;
bpnt = NULL;
}
bezier_add_point (bezier_sel,
(gint) pdata->type,
RINT (pdata->x),
RINT (pdata->y));
if (bpnt == NULL)
bpnt = bezier_sel->last_point;
list = g_slist_next (list);
}
if ( bezier_sel->closed )
{
bezier_sel->last_point->next = bpnt;
bpnt->prev = bezier_sel->last_point;
bezier_sel->cur_anchor = bezier_sel->points;
bezier_sel->cur_control = bezier_sel-> points->next;
}
return bezier_sel;
}
/* Always return a copy that must be freed later */
static gchar *
strip_off_cnumber (gchar *str)
{
gchar *hashptr;
gint num;
gchar *copy;
if (!str)
return str;
copy = g_strdup (str);
if ((hashptr = strrchr (copy,'#')) && /* have a hash */
strlen(hashptr) > 0 && /* followed by something */
(num = atoi(hashptr+1)) > 0 && /* which is a number */
((int) log10 (num) + 1) == strlen (hashptr+1)) /* which is at the end */
{
gchar *tstr;
/* Has a #<number> */
*hashptr = '\0';
tstr = g_strdup (copy);
g_free (copy);
copy = tstr;
}
return copy;
}
/* Return NULL if already unique else a unique string */
static gchar *
unique_name (GimpImage *gimage,
gchar *cstr)
{
GSList *tlist;
PathList *plp;
gboolean unique = TRUE;
gchar *copy_cstr;
gchar *copy_test;
gchar *stripped_copy;
gint counter = 1;
/* Get bzpath structure */
if (!gimage || !(plp = (PathList*) gimp_image_get_paths(gimage)))
return NULL;
tlist = plp->bz_paths;
while (tlist)
{
gchar *test_str;
test_str = ((Path *) (tlist->data))->name;
if (strcmp (cstr, test_str) == 0)
{
unique = FALSE;
break;
}
tlist = g_slist_next(tlist);
}
if (unique)
return NULL;
/* OK Clashes with something */
/* restart scan to find unique name */
stripped_copy = strip_off_cnumber (cstr);
copy_cstr = g_strdup_printf ("%s#%d", stripped_copy, counter++);
tlist = plp->bz_paths;
while (tlist)
{
copy_test = ((Path*)(tlist->data))->name;
if (strcmp (copy_cstr,copy_test) == 0)
{
g_free (copy_cstr);
copy_cstr = g_strdup_printf ("%s#%d", stripped_copy, counter++);
tlist = plp->bz_paths;
continue;
}
tlist = g_slist_next(tlist);
}
g_free (stripped_copy);
return copy_cstr;
}
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