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gimp/plug-ins/selection-to-path/selection-to-path.c

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/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for GIMP.
*
* Plugin to convert a selection to a path.
*
* Copyright (C) 1999 Andy Thomas alt@gimp.org
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
/* Change log:-
* 0.1 First version.
*/
#include "config.h"
#include <string.h>
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "libgimpmath/gimpmath.h"
#include "global.h"
#include "types.h"
#include "pxl-outline.h"
#include "fit.h"
#include "spline.h"
#include "selection-to-path.h"
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_BINARY "selection-to-path"
#define PLUG_IN_ROLE "gimp-selection-to-path"
#define RESPONSE_RESET 1
#define MID_POINT 127
/***** Magic numbers *****/
/* Variables set in dialog box */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint sel2path_dialog (SELVALS *sels);
static void sel2path_response (GtkWidget *widget,
gint response_id,
gpointer data);
static void dialog_print_selVals (SELVALS *sels);
static gboolean sel2path (gint32 image_ID);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static gint sel_x1, sel_y1, sel_x2, sel_y2;
static gint has_sel, sel_width, sel_height;
static SELVALS selVals;
static GimpPixelRgn selection_rgn;
static gboolean retVal = TRUE; /* Toggle if cancle button clicked */
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable (unused)" },
};
static const GimpParamDef advanced_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable (unused)" },
{ GIMP_PDB_FLOAT, "align-threshold", "align_threshold"},
{ GIMP_PDB_FLOAT, "corner-always-threshold", "corner_always_threshold"},
{ GIMP_PDB_INT8, "corner-surround", "corner_surround"},
{ GIMP_PDB_FLOAT, "corner-threshold", "corner_threshold"},
{ GIMP_PDB_FLOAT, "error-threshold", "error_threshold"},
{ GIMP_PDB_INT8, "filter-alternative-surround", "filter_alternative_surround"},
{ GIMP_PDB_FLOAT, "filter-epsilon", "filter_epsilon"},
{ GIMP_PDB_INT8, "filter-iteration-count", "filter_iteration_count"},
{ GIMP_PDB_FLOAT, "filter-percent", "filter_percent"},
{ GIMP_PDB_INT8, "filter-secondary-surround", "filter_secondary_surround"},
{ GIMP_PDB_INT8, "filter-surround", "filter_surround"},
{ GIMP_PDB_INT8, "keep-knees", "{1-Yes, 0-No}"},
{ GIMP_PDB_FLOAT, "line-reversion-threshold", "line_reversion_threshold"},
{ GIMP_PDB_FLOAT, "line-threshold", "line_threshold"},
{ GIMP_PDB_FLOAT, "reparameterize-improvement", "reparameterize_improvement"},
{ GIMP_PDB_FLOAT, "reparameterize-threshold", "reparameterize_threshold"},
{ GIMP_PDB_FLOAT, "subdivide-search", "subdivide_search"},
{ GIMP_PDB_INT8, "subdivide-surround", "subdivide_surround"},
{ GIMP_PDB_FLOAT, "subdivide-threshold", "subdivide_threshold"},
{ GIMP_PDB_INT8, "tangent-surround", "tangent_surround"},
};
gimp_install_procedure ("plug-in-sel2path",
"Converts a selection to a path",
"Converts a selection to a path",
"Andy Thomas",
"Andy Thomas",
"1999",
NULL,
"RGB*, INDEXED*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_install_procedure ("plug-in-sel2path-advanced",
"Converts a selection to a path (with advanced user menu)",
"Converts a selection to a path (with advanced user menu)",
"Andy Thomas",
"Andy Thomas",
"1999",
NULL,
"RGB*, INDEXED*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (advanced_args), 0,
advanced_args, NULL);
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
gint32 image_ID;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gboolean no_dialog;
run_mode = param[0].data.d_int32;
INIT_I18N ();
no_dialog = (strcmp (name, "plug-in-sel2path") == 0);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
image_ID = param[1].data.d_image;
if (image_ID < 0)
{
g_warning ("plug-in-sel2path needs a valid image ID");
return;
}
if (gimp_selection_is_empty (image_ID))
{
g_message (_("No selection to convert"));
return;
}
fit_set_default_params (&selVals);
if (!no_dialog)
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
if (gimp_get_data_size ("plug-in-sel2path-advanced") > 0)
{
gimp_get_data ("plug-in-sel2path-advanced", &selVals);
}
if (!sel2path_dialog (&selVals))
return;
/* Get the current settings */
fit_set_params (&selVals);
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 23)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
selVals.align_threshold = param[3].data.d_float;
selVals.corner_always_threshold = param[4].data.d_float;
selVals.corner_surround = param[5].data.d_int8;
selVals.corner_threshold = param[6].data.d_float;
selVals.error_threshold = param[7].data.d_float;
selVals.filter_alternative_surround = param[8].data.d_int8;
selVals.filter_epsilon = param[9].data.d_float;
selVals.filter_iteration_count = param[10].data.d_int8;
selVals.filter_percent = param[11].data.d_float;
selVals.filter_secondary_surround = param[12].data.d_int8;
selVals.filter_surround = param[13].data.d_int8;
selVals.keep_knees = param[14].data.d_int8;
selVals.line_reversion_threshold = param[15].data.d_float;
selVals.line_threshold = param[16].data.d_float;
selVals.reparameterize_improvement = param[17].data.d_float;
selVals.reparameterize_threshold = param[18].data.d_float;
selVals.subdivide_search = param[19].data.d_float;
selVals.subdivide_surround = param[20].data.d_int8;
selVals.subdivide_threshold = param[21].data.d_float;
selVals.tangent_surround = param[22].data.d_int8;
fit_set_params (&selVals);
}
break;
case GIMP_RUN_WITH_LAST_VALS:
if(gimp_get_data_size ("plug-in-sel2path-advanced") > 0)
{
gimp_get_data ("plug-in-sel2path-advanced", &selVals);
/* Set up the last values */
fit_set_params (&selVals);
}
break;
default:
break;
}
}
sel2path (image_ID);
values[0].data.d_status = status;
if (status == GIMP_PDB_SUCCESS)
{
dialog_print_selVals(&selVals);
if (run_mode == GIMP_RUN_INTERACTIVE && !no_dialog)
gimp_set_data ("plug-in-sel2path-advanced", &selVals, sizeof(SELVALS));
}
}
static void
dialog_print_selVals (SELVALS *sels)
{
#if 0
printf ("selVals.align_threshold %g\n", selVals.align_threshold);
printf ("selVals.corner_always_threshol %g\n", selVals.corner_always_threshold);
printf ("selVals.corner_surround %g\n", selVals.corner_surround);
printf ("selVals.corner_threshold %g\n", selVals.corner_threshold);
printf ("selVals.error_threshold %g\n", selVals.error_threshold);
printf ("selVals.filter_alternative_surround %g\n", selVals.filter_alternative_surround);
printf ("selVals.filter_epsilon %g\n", selVals.filter_epsilon);
printf ("selVals.filter_iteration_count %g\n", selVals.filter_iteration_count);
printf ("selVals.filter_percent %g\n", selVals.filter_percent);
printf ("selVals.filter_secondary_surround %g\n", selVals.filter_secondary_surround);
printf ("selVals.filter_surround %g\n", selVals.filter_surround);
printf ("selVals.keep_knees %d\n", selVals.keep_knees);
printf ("selVals.line_reversion_threshold %g\n", selVals.line_reversion_threshold);
printf ("selVals.line_threshold %g\n", selVals.line_threshold);
printf ("selVals.reparameterize_improvement %g\n", selVals.reparameterize_improvement);
printf ("selVals.reparameterize_threshold %g\n", selVals.reparameterize_threshold);
printf ("selVals.subdivide_search %g\n" selVals.subdivide_search);
printf ("selVals.subdivide_surround %g\n", selVals.subdivide_surround);
printf ("selVals.subdivide_threshold %g\n", selVals.subdivide_threshold);
printf ("selVals.tangent_surround %g\n", selVals.tangent_surround);
#endif /* 0 */
}
/* Build the dialog up. This was the hard part! */
static gint
sel2path_dialog (SELVALS *sels)
{
GtkWidget *dlg;
GtkWidget *table;
retVal = FALSE;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dlg = gimp_dialog_new (_("Selection to Path Advanced Settings"),
PLUG_IN_ROLE,
NULL, 0,
gimp_standard_help_func, "plug-in-sel2path-advanced",
GIMP_STOCK_RESET, RESPONSE_RESET,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
RESPONSE_RESET,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dlg));
g_signal_connect (dlg, "response",
G_CALLBACK (sel2path_response),
NULL);
g_signal_connect (dlg, "destroy",
G_CALLBACK (gtk_main_quit),
NULL);
table = dialog_create_selection_area (sels);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
table, TRUE, TRUE, 0);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
return retVal;
}
static void
sel2path_response (GtkWidget *widget,
gint response_id,
gpointer data)
{
switch (response_id)
{
case RESPONSE_RESET:
reset_adv_dialog ();
fit_set_params (&selVals);
break;
case GTK_RESPONSE_OK:
retVal = TRUE;
default:
gtk_widget_destroy (widget);
break;
}
}
guchar
sel_pixel_value (gint row,
gint col)
{
guchar ret;
if (col > sel_width || row > sel_height)
{
g_warning ("sel_pixel_value [%d,%d] out of bounds", col, row);
return 0;
}
gimp_pixel_rgn_get_pixel(&selection_rgn,&ret,col+sel_x1,row+sel_y1);
return ret;
}
gboolean
sel_pixel_is_white (gint row,
gint col)
{
if (sel_pixel_value (row, col) < MID_POINT)
return TRUE;
else
return FALSE;
}
gint
sel_get_width (void)
{
return sel_width;
}
gint
sel_get_height (void)
{
return sel_height;
}
gboolean
sel_valid_pixel (gint row,
gint col)
{
return (0 <= (row) && (row) < sel_get_height ()
&& 0 <= (col) && (col) < sel_get_width ());
}
static void
do_points (spline_list_array_type in_splines,
gint32 image_ID)
{
gint32 vectors;
gint32 stroke;
gint i, j;
gboolean have_points = FALSE;
spline_list_type spline_list;
/* check if there really is something to do... */
for (i = 0; i < SPLINE_LIST_ARRAY_LENGTH (in_splines); i++)
{
spline_list = SPLINE_LIST_ARRAY_ELT (in_splines, i);
/* Ignore single points that are on their own */
if (SPLINE_LIST_LENGTH (spline_list) < 2)
continue;
have_points = TRUE;
break;
}
if (!have_points)
return;
vectors = gimp_vectors_new (image_ID, _("Selection"));
for (j = 0; j < SPLINE_LIST_ARRAY_LENGTH (in_splines); j++)
{
spline_type seg;
spline_list = SPLINE_LIST_ARRAY_ELT (in_splines, j);
/* Ignore single points that are on their own */
if (SPLINE_LIST_LENGTH (spline_list) < 2)
continue;
seg = SPLINE_LIST_ELT (spline_list, 0);
stroke = gimp_vectors_bezier_stroke_new_moveto (vectors,
START_POINT (seg).x,
START_POINT (seg).y);
for (i = 0; i < SPLINE_LIST_LENGTH (spline_list); i++)
{
seg = SPLINE_LIST_ELT (spline_list, i);
if (SPLINE_DEGREE (seg) == LINEAR)
gimp_vectors_bezier_stroke_lineto (vectors, stroke,
END_POINT (seg).x,
END_POINT (seg).y);
else if (SPLINE_DEGREE (seg) == CUBIC)
gimp_vectors_bezier_stroke_cubicto (vectors, stroke,
CONTROL1 (seg).x,
CONTROL1 (seg).y,
CONTROL2 (seg).x,
CONTROL2 (seg).y,
END_POINT (seg).x,
END_POINT (seg).y);
else
g_warning ("print_spline: strange degree (%d)",
SPLINE_DEGREE (seg));
}
gimp_vectors_stroke_close (vectors, stroke);
/* transform to GIMPs coordinate system, taking the selections
* bounding box into account */
gimp_vectors_stroke_scale (vectors, stroke, 1.0, -1.0);
gimp_vectors_stroke_translate (vectors, stroke,
sel_x1, sel_y1 + sel_height + 1);
}
gimp_image_insert_vectors (image_ID, vectors, -1, -1);
}
static gboolean
sel2path (gint32 image_ID)
{
gint32 selection_ID;
GimpDrawable *sel_drawable;
pixel_outline_list_type olt;
spline_list_array_type splines;
gimp_selection_bounds (image_ID, &has_sel,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
/* Now get the selection channel */
selection_ID = gimp_image_get_selection (image_ID);
if (selection_ID < 0)
return FALSE;
sel_drawable = gimp_drawable_get (selection_ID);
if (gimp_drawable_bpp (selection_ID) != 1)
{
g_warning ("Internal error. Selection bpp > 1");
return FALSE;
}
gimp_pixel_rgn_init (&selection_rgn, sel_drawable,
sel_x1, sel_y1, sel_width, sel_height,
FALSE, FALSE);
gimp_tile_cache_ntiles (2 * (sel_drawable->width + gimp_tile_width () - 1) /
gimp_tile_width ());
olt = find_outline_pixels ();
splines = fitted_splines (olt);
do_points (splines, image_ID);
gimp_drawable_detach (sel_drawable);
gimp_displays_flush ();
return TRUE;
}
void
safe_free (address *item)
{
g_free (*item);
*item = NULL;
}
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