gimp/app/tools/gimpregionselecttool.c

394 lines
14 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpregionselecttool.c
*
* 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/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.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/gimplayer-floating-sel.h"
#include "display/gimpcanvas.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-cursor.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimpregionselectoptions.h"
#include "gimpregionselecttool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
static void gimp_region_select_tool_finalize (GObject *object);
static void gimp_region_select_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_region_select_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_region_select_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_region_select_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_region_select_tool_draw (GimpDrawTool *draw_tool);
static GdkSegment *gimp_region_select_tool_calculate (GimpRegionSelectTool *region_sel,
GimpDisplay *display,
gint *num_segs);
G_DEFINE_TYPE (GimpRegionSelectTool, gimp_region_select_tool,
GIMP_TYPE_SELECTION_TOOL)
#define parent_class gimp_region_select_tool_parent_class
static void
gimp_region_select_tool_class_init (GimpRegionSelectToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
object_class->finalize = gimp_region_select_tool_finalize;
tool_class->button_press = gimp_region_select_tool_button_press;
tool_class->button_release = gimp_region_select_tool_button_release;
tool_class->motion = gimp_region_select_tool_motion;
tool_class->cursor_update = gimp_region_select_tool_cursor_update;
draw_tool_class->draw = gimp_region_select_tool_draw;
}
static void
gimp_region_select_tool_init (GimpRegionSelectTool *region_select)
{
GimpTool *tool = GIMP_TOOL (region_select);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_motion_mode (tool->control, GIMP_MOTION_MODE_COMPRESS);
region_select->x = 0;
region_select->y = 0;
region_select->saved_threshold = 0.0;
region_select->region_mask = NULL;
region_select->segs = NULL;
region_select->num_segs = 0;
}
static void
gimp_region_select_tool_finalize (GObject *object)
{
GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (object);
if (region_sel->region_mask)
{
g_object_unref (region_sel->region_mask);
region_sel->region_mask = NULL;
}
if (region_sel->segs)
{
g_free (region_sel->segs);
region_sel->segs = NULL;
region_sel->num_segs = 0;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_region_select_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
region_sel->x = coords->x;
region_sel->y = coords->y;
region_sel->saved_threshold = options->threshold;
gimp_tool_control_activate (tool->control);
tool->display = display;
if (gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (region_sel), coords))
return;
gimp_tool_push_status (tool, display,
_("Move the mouse to change threshold"));
/* calculate the region boundary */
region_sel->segs = gimp_region_select_tool_calculate (region_sel, display,
&region_sel->num_segs);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}
static void
gimp_region_select_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
GimpSelectionOptions *sel_options = GIMP_SELECTION_TOOL_GET_OPTIONS (tool);
GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
GimpImage *image = gimp_display_get_image (display);
gimp_tool_pop_status (tool, display);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
if (release_type != GIMP_BUTTON_RELEASE_CANCEL)
{
if (GIMP_SELECTION_TOOL (tool)->function == SELECTION_ANCHOR)
{
if (gimp_image_get_floating_selection (image))
{
/* If there is a floating selection, anchor it */
floating_sel_anchor (gimp_image_get_floating_selection (image));
}
else
{
/* Otherwise, clear the selection mask */
gimp_channel_clear (gimp_image_get_mask (image), NULL, TRUE);
}
gimp_image_flush (image);
}
else if (region_sel->region_mask)
{
gint off_x = 0;
gint off_y = 0;
if (! options->sample_merged)
{
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
}
gimp_channel_select_channel (gimp_image_get_mask (image),
GIMP_REGION_SELECT_TOOL_GET_CLASS (tool)->undo_desc,
region_sel->region_mask,
off_x,
off_y,
sel_options->operation,
sel_options->feather,
sel_options->feather_radius,
sel_options->feather_radius);
gimp_image_flush (image);
}
}
if (region_sel->region_mask)
{
g_object_unref (region_sel->region_mask);
region_sel->region_mask = NULL;
}
if (region_sel->segs)
{
g_free (region_sel->segs);
region_sel->segs = NULL;
region_sel->num_segs = 0;
}
/* Restore the original threshold */
g_object_set (options,
"threshold", region_sel->saved_threshold,
NULL);
}
static void
gimp_region_select_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
GdkSegment *new_segs;
gint num_new_segs;
gint diff_x, diff_y;
gdouble diff;
static guint32 last_time = 0;
/* 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 - region_sel->x;
diff_y = coords->y - region_sel->y;
diff = ((ABS (diff_x) > ABS (diff_y)) ? diff_x : diff_y) / 2.0;
g_object_set (options,
"threshold", CLAMP (region_sel->saved_threshold + diff, 0, 255),
NULL);
/* calculate the new region boundary */
new_segs = gimp_region_select_tool_calculate (region_sel, display,
&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 (region_sel->segs)
g_free (region_sel->segs);
region_sel->segs = new_segs;
region_sel->num_segs = num_new_segs;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_region_select_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_NONE;
GimpImage *image = gimp_display_get_image (display);
if (! gimp_image_coords_in_active_pickable (image, coords,
options->sample_merged, FALSE))
modifier = GIMP_CURSOR_MODIFIER_BAD;
gimp_tool_control_set_cursor_modifier (tool->control, modifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_region_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (draw_tool);
if (region_sel->segs)
{
GimpDisplayShell *shell;
shell = gimp_display_get_shell (GIMP_TOOL (draw_tool)->display);
gimp_canvas_draw_segments (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
region_sel->segs, region_sel->num_segs);
}
}
static GdkSegment *
gimp_region_select_tool_calculate (GimpRegionSelectTool *region_sel,
GimpDisplay *display,
gint *num_segs)
{
GimpTool *tool = GIMP_TOOL (region_sel);
GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GdkSegment *segs;
BoundSeg *bsegs;
PixelRegion maskPR;
gimp_display_shell_set_override_cursor (shell, GDK_WATCH);
if (region_sel->region_mask)
g_object_unref (region_sel->region_mask);
region_sel->region_mask =
GIMP_REGION_SELECT_TOOL_GET_CLASS (region_sel)->get_mask (region_sel,
display);
if (! region_sel->region_mask)
{
gimp_display_shell_unset_override_cursor (shell);
*num_segs = 0;
return NULL;
}
/* calculate and allocate a new segment array which represents the
* boundary of the contiguous region
*/
pixel_region_init (&maskPR,
gimp_drawable_get_tiles (GIMP_DRAWABLE (region_sel->region_mask)),
0, 0,
gimp_item_get_width (GIMP_ITEM (region_sel->region_mask)),
gimp_item_get_height (GIMP_ITEM (region_sel->region_mask)),
FALSE);
bsegs = boundary_find (&maskPR, BOUNDARY_WITHIN_BOUNDS,
0, 0,
gimp_item_get_width (GIMP_ITEM (region_sel->region_mask)),
gimp_item_get_height (GIMP_ITEM (region_sel->region_mask)),
BOUNDARY_HALF_WAY,
num_segs);
segs = g_new (GdkSegment, *num_segs);
gimp_display_shell_transform_segments (shell, bsegs, segs, *num_segs,
! options->sample_merged);
g_free (bsegs);
gimp_display_shell_unset_override_cursor (shell);
return segs;
}