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gimp/app/tools/gimpfreeselecttool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "tools-types.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
#include "core/gimpscanconvert.h"
#include "gimpeditselectiontool.h"
#include "gimpfreeselecttool.h"
#include "selection_options.h"
#include "tool_options.h"
#include "tool_manager.h"
#include "errors.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "libgimp/gimpintl.h"
#define WANT_FREE_SELECT_BITS
#include "icons.h"
#define DEFAULT_MAX_INC 1024
#define SUPERSAMPLE 3
#define SUPERSAMPLE2 9
static void gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass);
static void gimp_free_select_tool_init (GimpFreeSelectTool *free_select);
static void gimp_free_select_tool_destroy (GtkObject *object);
static void gimp_free_select_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_free_select_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_free_select_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_free_select_tool_draw (GimpDrawTool *draw_tool);
static void gimp_free_select_tool_add_point (GimpFreeSelectTool *free_sel,
gint x,
gint y);
static GimpChannel * scan_convert (GimpImage *gimage,
gint n_points,
GimpVector2 *points,
gint width,
gint height,
gboolean antialias);
static GimpSelectionToolClass *parent_class = NULL;
static SelectionOptions * free_options = NULL;
/* public functions */
void
gimp_free_select_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_FREE_SELECT_TOOL,
FALSE,
"gimp:free_select_tool",
_("Free Select"),
_("Select hand-drawn regions"),
_("/Tools/Selection Tools/Free Select"), "F",
NULL, "tools/free_select.html",
(const gchar **) free_select_bits);
}
GtkType
gimp_free_select_tool_get_type (void)
{
static GtkType free_select_type = 0;
if (! free_select_type)
{
GtkTypeInfo free_select_info =
{
"GimpFreeSelectTool",
sizeof (GimpFreeSelectTool),
sizeof (GimpFreeSelectToolClass),
(GtkClassInitFunc) gimp_free_select_tool_class_init,
(GtkObjectInitFunc) gimp_free_select_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL
};
free_select_type = gtk_type_unique (GIMP_TYPE_SELECTION_TOOL,
&free_select_info);
}
return free_select_type;
}
void
free_select (GimpImage *gimage,
gint n_points,
GimpVector2 *points,
SelectOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius)
{
GimpChannel *mask;
/* if applicable, replace the current selection */
/* or insure that a floating selection is anchored down... */
if (op == SELECTION_REPLACE)
gimage_mask_clear (gimage);
else
gimage_mask_undo (gimage);
mask = scan_convert (gimage, n_points, points,
gimage->width, gimage->height, antialias);
if (mask)
{
if (feather)
gimp_channel_feather (mask, gimp_image_get_mask (gimage),
feather_radius,
feather_radius,
op, 0, 0);
else
gimp_channel_combine_mask (gimp_image_get_mask (gimage),
mask, op, 0, 0);
gtk_object_unref (GTK_OBJECT (mask));
}
}
/* private functions */
static void
gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass)
{
GtkObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = (GtkObjectClass *) klass;
tool_class = (GimpToolClass *) klass;
draw_tool_class = (GimpDrawToolClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_SELECTION_TOOL);
object_class->destroy = gimp_free_select_tool_destroy;
tool_class->button_press = gimp_free_select_tool_button_press;
tool_class->button_release = gimp_free_select_tool_button_release;
tool_class->motion = gimp_free_select_tool_motion;
draw_tool_class->draw = gimp_free_select_tool_draw;
}
static void
gimp_free_select_tool_init (GimpFreeSelectTool *free_select)
{
GimpTool *tool;
GimpSelectionTool *select_tool;
tool = GIMP_TOOL (free_select);
select_tool = GIMP_SELECTION_TOOL (free_select);
if (! free_options)
{
free_options = selection_options_new (GIMP_TYPE_FREE_SELECT_TOOL,
selection_options_reset);
tool_manager_register_tool_options (GIMP_TYPE_FREE_SELECT_TOOL,
(GimpToolOptions *) free_options);
}
tool->tool_cursor = GIMP_FREE_SELECT_TOOL_CURSOR;
tool->scroll_lock = TRUE; /* Do not allow scrolling */
free_select->points = NULL;
free_select->num_points = 0;
free_select->max_segs = 0;
}
static void
gimp_free_select_tool_destroy (GtkObject *object)
{
GimpFreeSelectTool *free_sel;
free_sel = GIMP_FREE_SELECT_TOOL (object);
g_free (free_sel->points);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gimp_free_select_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpFreeSelectTool *free_sel;
free_sel = GIMP_FREE_SELECT_TOOL (tool);
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
tool->state = ACTIVE;
tool->gdisp = gdisp;
switch (GIMP_SELECTION_TOOL (tool)->op)
{
case SELECTION_MOVE_MASK:
init_edit_selection (tool, gdisp, bevent, EDIT_MASK_TRANSLATE);
return;
case SELECTION_MOVE:
init_edit_selection (tool, gdisp, bevent, EDIT_MASK_TO_LAYER_TRANSLATE);
return;
default:
break;
}
free_sel->num_points = 0;
gimp_free_select_tool_add_point (free_sel, bevent->x, bevent->y);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool),
gdisp->canvas->window);
}
static void
gimp_free_select_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpFreeSelectTool *free_sel;
GimpVector2 *points;
gint i;
free_sel = GIMP_FREE_SELECT_TOOL (tool);
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
tool->state = INACTIVE;
/* First take care of the case where the user "cancels" the action */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
if (free_sel->num_points == 1)
{
/* If there is a floating selection, anchor it */
if (gimp_image_floating_sel (gdisp->gimage))
floating_sel_anchor (gimp_image_floating_sel (gdisp->gimage));
/* Otherwise, clear the selection mask */
else
gimage_mask_clear (gdisp->gimage);
gdisplays_flush ();
return;
}
points = g_new (GimpVector2, free_sel->num_points);
for (i = 0; i < free_sel->num_points; i++)
{
gdisplay_untransform_coords_f (gdisp,
free_sel->points[i].x,
free_sel->points[i].y,
&points[i].x,
&points[i].y,
FALSE);
}
free_select (gdisp->gimage,
free_sel->num_points, points,
GIMP_SELECTION_TOOL (tool)->op,
free_options->antialias,
free_options->feather,
free_options->feather_radius);
g_free (points);
gdisplays_flush ();
}
}
static void
gimp_free_select_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
GimpFreeSelectTool *free_sel;
GimpSelectionTool *sel_tool;
GimpDrawTool *draw_tool;
free_sel = GIMP_FREE_SELECT_TOOL (tool);
sel_tool = GIMP_SELECTION_TOOL (tool);
draw_tool = GIMP_DRAW_TOOL (tool);
/* needed for immediate cursor update on modifier event */
sel_tool->current_x = mevent->x;
sel_tool->current_y = mevent->y;
if (tool->state != ACTIVE)
return;
if (sel_tool->op == SELECTION_ANCHOR)
{
sel_tool->op = SELECTION_REPLACE;
gimp_tool_cursor_update (tool, mevent, gdisp);
}
gimp_free_select_tool_add_point (free_sel, mevent->x, mevent->y);
gdk_draw_line (draw_tool->win,
draw_tool->gc,
free_sel->points[free_sel->num_points - 2].x,
free_sel->points[free_sel->num_points - 2].y,
free_sel->points[free_sel->num_points - 1].x,
free_sel->points[free_sel->num_points - 1].y);
}
static void
gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpFreeSelectTool *free_sel;
gint i;
free_sel = GIMP_FREE_SELECT_TOOL (draw_tool);
for (i = 1; i < free_sel->num_points; i++)
{
gdk_draw_line (draw_tool->win,
draw_tool->gc,
free_sel->points[i - 1].x,
free_sel->points[i - 1].y,
free_sel->points[i].x,
free_sel->points[i].y);
}
}
static void
gimp_free_select_tool_add_point (GimpFreeSelectTool *free_sel,
gint x,
gint y)
{
if (free_sel->num_points >= free_sel->max_segs)
{
free_sel->max_segs += DEFAULT_MAX_INC;
free_sel->points = (GdkPoint *)
g_realloc ((void *) free_sel->points,
sizeof (GdkPoint) * free_sel->max_segs);
if (! free_sel->points)
gimp_fatal_error ("%s(): Unable to reallocate points array",
G_GNUC_FUNCTION);
}
free_sel->points[free_sel->num_points].x = x;
free_sel->points[free_sel->num_points].y = y;
free_sel->num_points++;
}
static GimpChannel *
scan_convert (GimpImage *gimage,
gint n_points,
GimpVector2 *points,
gint width,
gint height,
gboolean antialias)
{
GimpChannel *mask;
GimpScanConvert *sc;
sc = gimp_scan_convert_new (width, height, antialias ? SUPERSAMPLE : 1);
gimp_scan_convert_add_points (sc, n_points, points);
mask = gimp_scan_convert_to_channel (sc, gimage);
gimp_scan_convert_free (sc);
return mask;
}
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