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gimp/app/tools/gimpregionselecttool.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/gimpchannel-select.h"
#include "core/gimpimage.h"
#include "core/gimpimage-contiguous-region.h"
#include "core/gimplayer-floating-sel.h"
#include "core/gimptoolinfo.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpcanvas.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-cursor.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimpfuzzyselecttool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.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 *
gimp_fuzzy_select_tool_calculate (GimpFuzzySelectTool *fuzzy_sel,
GimpDisplay *gdisp,
gint *num_segs);
static GimpSelectionToolClass *parent_class = NULL;
void
gimp_fuzzy_select_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_FUZZY_SELECT_TOOL,
GIMP_TYPE_SELECTION_OPTIONS,
gimp_selection_options_gui,
0,
"gimp-fuzzy-select-tool",
_("Fuzzy Select"),
_("Select contiguous regions"),
N_("Fu_zzy Select"), "Z",
NULL, GIMP_HELP_TOOL_FUZZY_SELECT,
GIMP_STOCK_TOOL_FUZZY_SELECT,
data);
}
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;
}
static void
gimp_fuzzy_select_tool_class_init (GimpFuzzySelectToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *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 = GIMP_TOOL (fuzzy_select);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_motion_mode (tool->control, GIMP_MOTION_MODE_COMPRESS);
gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_FUZZY_SELECT);
fuzzy_select->x = 0;
fuzzy_select->y = 0;
fuzzy_select->first_x = 0;
fuzzy_select->first_y = 0;
fuzzy_select->first_threshold = 0.0;
fuzzy_select->fuzzy_mask = NULL;
fuzzy_select->segs = NULL;
fuzzy_select->num_segs = 0;
}
static void
gimp_fuzzy_select_tool_finalize (GObject *object)
{
GimpFuzzySelectTool *fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (object);
if (fuzzy_sel->fuzzy_mask)
{
g_object_unref (fuzzy_sel->fuzzy_mask);
fuzzy_sel->fuzzy_mask = NULL;
}
if (fuzzy_sel->segs)
{
g_free (fuzzy_sel->segs);
fuzzy_sel->segs = NULL;
fuzzy_sel->num_segs = 0;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_fuzzy_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFuzzySelectTool *fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (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 = options->threshold;
gimp_tool_control_activate (tool->control);
tool->gdisp = gdisp;
if (gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (fuzzy_sel), coords))
return;
gimp_tool_push_status (tool, gdisp, _("Move the mouse to change threshold."));
/* calculate the region boundary */
fuzzy_sel->segs = gimp_fuzzy_select_tool_calculate (fuzzy_sel, gdisp,
&fuzzy_sel->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 = GIMP_FUZZY_SELECT_TOOL (tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
gimp_tool_pop_status (tool, gdisp);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
/* First take care of the case where the user "cancels" the action */
if (! (state & GDK_BUTTON3_MASK))
{
gint off_x, off_y;
if (GIMP_SELECTION_TOOL (tool)->op == SELECTION_ANCHOR)
{
/* 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
gimp_channel_clear (gimp_image_get_mask (gdisp->gimage), NULL,
TRUE);
gimp_image_flush (gdisp->gimage);
return;
}
if (options->sample_merged)
{
off_x = 0;
off_y = 0;
}
else
{
GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
}
gimp_channel_select_channel (gimp_image_get_mask (gdisp->gimage),
tool->tool_info->blurb,
fuzzy_sel->fuzzy_mask,
off_x,
off_y,
GIMP_SELECTION_TOOL (tool)->op,
options->feather,
options->feather_radius,
options->feather_radius);
g_object_unref (fuzzy_sel->fuzzy_mask);
fuzzy_sel->fuzzy_mask = NULL;
gimp_image_flush (gdisp->gimage);
}
/* If the segment array is allocated, free it */
if (fuzzy_sel->segs)
{
g_free (fuzzy_sel->segs);
fuzzy_sel->segs = NULL;
fuzzy_sel->num_segs = 0;
}
/* Restore the original threshold */
g_object_set (options,
"threshold", fuzzy_sel->first_threshold,
NULL);
}
static void
gimp_fuzzy_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFuzzySelectTool *fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (tool);
GimpSelectionOptions *options;
GdkSegment *new_segs;
gint num_new_segs;
gint diff_x, diff_y;
gdouble diff;
static guint32 last_time = 0;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
/* don't let the events come in too fast, ignore below a delay of 100 ms */
if (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;
g_object_set (options,
"threshold", CLAMP (fuzzy_sel->first_threshold + diff, 0, 255),
NULL);
/* calculate the new fuzzy boundary */
new_segs = gimp_fuzzy_select_tool_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 (fuzzy_sel->segs)
g_free (fuzzy_sel->segs);
fuzzy_sel->segs = new_segs;
fuzzy_sel->num_segs = num_new_segs;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_fuzzy_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpFuzzySelectTool *fuzzy_sel = GIMP_FUZZY_SELECT_TOOL (draw_tool);
if (fuzzy_sel->segs)
{
GimpDisplayShell *shell;
shell = GIMP_DISPLAY_SHELL (GIMP_TOOL (draw_tool)->gdisp->shell);
gimp_canvas_draw_segments (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
fuzzy_sel->segs, fuzzy_sel->num_segs);
}
}
static GdkSegment *
gimp_fuzzy_select_tool_calculate (GimpFuzzySelectTool *fuzzy_sel,
GimpDisplay *gdisp,
gint *num_segs)
{
GimpTool *tool = GIMP_TOOL (fuzzy_sel);
GimpSelectionOptions *options;
GimpDisplayShell *shell;
PixelRegion maskPR;
GimpChannel *new;
GdkSegment *segs;
BoundSeg *bsegs;
GimpDrawable *drawable;
gint i;
gint x, y;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_display_shell_set_override_cursor (shell, GDK_WATCH);
x = fuzzy_sel->x;
y = fuzzy_sel->y;
if (! options->sample_merged)
{
gint off_x, off_y;
gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
x -= off_x;
y -= off_y;
}
new = gimp_image_contiguous_region_by_seed (gdisp->gimage, drawable,
options->sample_merged,
options->antialias,
options->threshold,
options->select_transparent,
x, y);
if (fuzzy_sel->fuzzy_mask)
g_object_unref (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_item_width (GIMP_ITEM (fuzzy_sel->fuzzy_mask)),
gimp_item_height (GIMP_ITEM (fuzzy_sel->fuzzy_mask)),
FALSE);
bsegs = boundary_find (&maskPR, BOUNDARY_WITHIN_BOUNDS,
0, 0,
gimp_item_width (GIMP_ITEM (fuzzy_sel->fuzzy_mask)),
gimp_item_height (GIMP_ITEM (fuzzy_sel->fuzzy_mask)),
BOUNDARY_HALF_WAY,
num_segs);
segs = g_new (GdkSegment, *num_segs);
for (i = 0; i < *num_segs; i++)
{
gimp_display_shell_transform_xy (shell,
bsegs[i].x1, bsegs[i].y1,
&x, &y,
! options->sample_merged);
segs[i].x1 = x;
segs[i].y1 = y;
gimp_display_shell_transform_xy (shell,
bsegs[i].x2, bsegs[i].y2,
&x, &y,
! options->sample_merged);
segs[i].x2 = x;
segs[i].y2 = y;
}
g_free (bsegs);
gimp_display_shell_unset_override_cursor (shell);
return segs;
}
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