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gimp/app/tools/gimpfuzzyselecttool.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 <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "libgimpmath/gimpmath.h"
#include "tools-types.h"
#include "base/boundary.h"
#include "base/pixel-region.h"
#include "core/gimpchannel.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-contiguous-region.h"
#include "core/gimpimage-mask.h"
#include "core/gimpimage-mask-select.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "display/gimpdisplayshell.h"
#include "gimpeditselectiontool.h"
#include "gimpfuzzyselecttool.h"
#include "selection_options.h"
#include "gimprc.h"
#include "libgimp/gimpintl.h"
static void gimp_fuzzy_select_tool_class_init (GimpFuzzySelectToolClass *klass);
static void gimp_fuzzy_select_tool_init (GimpFuzzySelectTool *fuzzy_select);
static void gimp_fuzzy_select_tool_finalize (GObject *object);
static void gimp_fuzzy_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_fuzzy_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_fuzzy_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_fuzzy_select_tool_draw (GimpDrawTool *draw_tool);
static GdkSegment * fuzzy_select_calculate (GimpFuzzySelectTool *fuzzy_sel,
GimpDisplay *gdisp,
gint *nsegs);
/* XSegments which make up the fuzzy selection boundary */
static GdkSegment *segs = NULL;
static gint num_segs = 0;
static GimpSelectionToolClass *parent_class = NULL;
/* public functions */
void
gimp_fuzzy_select_tool_register (Gimp *gimp,
GimpToolRegisterCallback callback)
{
(* callback) (gimp,
GIMP_TYPE_FUZZY_SELECT_TOOL,
selection_options_new,
FALSE,
"gimp:fuzzy_select_tool",
_("Fuzzy Select"),
_("Select contiguous regions"),
_("/Tools/Selection Tools/Fuzzy Select"), "Z",
NULL, "tools/fuzzy_select.html",
GIMP_STOCK_TOOL_FUZZY_SELECT);
}
GType
gimp_fuzzy_select_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpFuzzySelectToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_fuzzy_select_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpFuzzySelectTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_fuzzy_select_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_SELECTION_TOOL,
"GimpFuzzySelectTool",
&tool_info, 0);
}
return tool_type;
}
/* private functions */
static void
gimp_fuzzy_select_tool_class_init (GimpFuzzySelectToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_fuzzy_select_tool_finalize;
tool_class->button_press = gimp_fuzzy_select_tool_button_press;
tool_class->button_release = gimp_fuzzy_select_tool_button_release;
tool_class->motion = gimp_fuzzy_select_tool_motion;
draw_tool_class->draw = gimp_fuzzy_select_tool_draw;
}
static void
gimp_fuzzy_select_tool_init (GimpFuzzySelectTool *fuzzy_select)
{
GimpTool *tool;
GimpSelectionTool *select_tool;
tool = GIMP_TOOL (fuzzy_select);
select_tool = GIMP_SELECTION_TOOL (fuzzy_select);
tool->tool_cursor = GIMP_FUZZY_SELECT_TOOL_CURSOR;
tool->scroll_lock = TRUE; /* Do not allow scrolling */
fuzzy_select->fuzzy_mask = NULL;
fuzzy_select->x = 0;
fuzzy_select->y = 0;
fuzzy_select->first_x = 0;
fuzzy_select->first_y = 0;
fuzzy_select->first_threshold = 0.0;
}
static void
gimp_fuzzy_select_tool_finalize (GObject *object)
{
GimpFuzzySelectTool *fuzzy_sel;
fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (object);
if (fuzzy_sel->fuzzy_mask)
{
g_object_unref (G_OBJECT (fuzzy_sel->fuzzy_mask));
fuzzy_sel->fuzzy_mask = NULL;
}
}
static void
gimp_fuzzy_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFuzzySelectTool *fuzzy_sel;
SelectionOptions *sel_options;
fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (tool);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
fuzzy_sel->x = coords->x;
fuzzy_sel->y = coords->y;
fuzzy_sel->first_x = fuzzy_sel->x;
fuzzy_sel->first_y = fuzzy_sel->y;
fuzzy_sel->first_threshold = sel_options->threshold;
tool->state = ACTIVE;
tool->gdisp = gdisp;
switch (GIMP_SELECTION_TOOL (tool)->op)
{
case SELECTION_MOVE_MASK:
init_edit_selection (tool, gdisp, coords, EDIT_MASK_TRANSLATE);
return;
case SELECTION_MOVE:
init_edit_selection (tool, gdisp, coords, EDIT_MASK_TO_LAYER_TRANSLATE);
return;
default:
break;
}
/* calculate the region boundary */
segs = fuzzy_select_calculate (fuzzy_sel, gdisp, &num_segs);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
}
static void
gimp_fuzzy_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFuzzySelectTool *fuzzy_sel;
SelectionOptions *sel_options;
GimpDrawable *drawable;
fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (tool);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
tool->state = INACTIVE;
/* First take care of the case where the user "cancels" the action */
if (! (state & GDK_BUTTON3_MASK))
{
drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_image_mask_select_channel (gdisp->gimage,
drawable,
sel_options->sample_merged,
fuzzy_sel->fuzzy_mask,
GIMP_SELECTION_TOOL (tool)->op,
sel_options->feather,
sel_options->feather_radius,
sel_options->feather_radius);
g_object_unref (G_OBJECT (fuzzy_sel->fuzzy_mask));
fuzzy_sel->fuzzy_mask = NULL;
gdisplays_flush ();
}
/* If the segment array is allocated, free it */
if (segs)
{
g_free (segs);
segs = NULL;
}
}
static void
gimp_fuzzy_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFuzzySelectTool *fuzzy_sel;
GimpSelectionTool *sel_tool;
SelectionOptions *sel_options;
GdkSegment *new_segs;
gint num_new_segs;
gint diff_x, diff_y;
gdouble diff;
static guint32 last_time = 0;
fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (tool);
sel_tool = GIMP_SELECTION_TOOL (tool);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
if (tool->state != ACTIVE)
return;
/* don't let the events come in too fast, ignore below a delay of 100 ms */
if (ABS (time - last_time) < 100)
return;
last_time = time;
diff_x = coords->x - fuzzy_sel->first_x;
diff_y = coords->y - fuzzy_sel->first_y;
diff = ((ABS (diff_x) > ABS (diff_y)) ? diff_x : diff_y) / 2.0;
gtk_adjustment_set_value (GTK_ADJUSTMENT (sel_options->threshold_w),
fuzzy_sel->first_threshold + diff);
/* calculate the new fuzzy boundary */
new_segs = fuzzy_select_calculate (fuzzy_sel, gdisp, &num_new_segs);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* make sure the XSegment array is freed before we assign the new one */
if (segs)
g_free (segs);
segs = new_segs;
num_segs = num_new_segs;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static GdkSegment *
fuzzy_select_calculate (GimpFuzzySelectTool *fuzzy_sel,
GimpDisplay *gdisp,
gint *nsegs)
{
GimpTool *tool;
SelectionOptions *sel_options;
PixelRegion maskPR;
GimpChannel *new;
GdkSegment *segs;
BoundSeg *bsegs;
GimpDrawable *drawable;
gint i;
gint x, y;
tool = GIMP_TOOL (fuzzy_sel);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_display_shell_set_override_cursor (GIMP_DISPLAY_SHELL (gdisp->shell),
GDK_WATCH);
x = fuzzy_sel->x;
y = fuzzy_sel->y;
if (! sel_options->sample_merged)
{
gint off_x, off_y;
gimp_drawable_offsets (drawable, &off_x, &off_y);
x -= off_x;
y -= off_y;
}
new = gimp_image_contiguous_region_by_seed (gdisp->gimage, drawable,
sel_options->sample_merged,
sel_options->antialias,
sel_options->threshold,
sel_options->select_transparent,
x, y);
if (fuzzy_sel->fuzzy_mask)
g_object_unref (G_OBJECT (fuzzy_sel->fuzzy_mask));
fuzzy_sel->fuzzy_mask = new;
/* calculate and allocate a new XSegment array which represents the boundary
* of the color-contiguous region
*/
pixel_region_init (&maskPR,
gimp_drawable_data (GIMP_DRAWABLE (fuzzy_sel->fuzzy_mask)),
0, 0,
gimp_drawable_width (GIMP_DRAWABLE (fuzzy_sel->fuzzy_mask)),
gimp_drawable_height (GIMP_DRAWABLE (fuzzy_sel->fuzzy_mask)),
FALSE);
bsegs = find_mask_boundary (&maskPR, nsegs, WithinBounds,
0, 0,
gimp_drawable_width (GIMP_DRAWABLE (fuzzy_sel->fuzzy_mask)),
gimp_drawable_height (GIMP_DRAWABLE (fuzzy_sel->fuzzy_mask)));
segs = g_new (GdkSegment, *nsegs);
for (i = 0; i < *nsegs; i++)
{
gdisplay_transform_coords (gdisp,
bsegs[i].x1, bsegs[i].y1,
&x, &y,
! sel_options->sample_merged);
segs[i].x1 = x;
segs[i].y1 = y;
gdisplay_transform_coords (gdisp,
bsegs[i].x2, bsegs[i].y2,
&x, &y,
! sel_options->sample_merged);
segs[i].x2 = x;
segs[i].y2 = y;
}
g_free (bsegs);
gimp_display_shell_unset_override_cursor (GIMP_DISPLAY_SHELL (gdisp->shell));
return segs;
}
static void
gimp_fuzzy_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpFuzzySelectTool *fuzzy_sel;
fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (draw_tool);
if (segs)
gdk_draw_segments (draw_tool->win,
draw_tool->gc,
segs, num_segs);
}
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