mirror of https://github.com/GNOME/gimp.git
394 lines
14 KiB
C
394 lines
14 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpregionselecttool.c
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpwidgets/gimpwidgets.h"
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#include "tools-types.h"
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#include "base/boundary.h"
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#include "base/pixel-region.h"
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#include "core/gimpchannel.h"
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#include "core/gimpchannel-select.h"
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#include "core/gimpimage.h"
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#include "core/gimplayer-floating-sel.h"
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#include "display/gimpcanvas.h"
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#include "display/gimpdisplay.h"
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#include "display/gimpdisplayshell.h"
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#include "display/gimpdisplayshell-cursor.h"
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#include "display/gimpdisplayshell-transform.h"
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#include "gimpregionselectoptions.h"
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#include "gimpregionselecttool.h"
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#include "gimptoolcontrol.h"
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#include "gimp-intl.h"
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static void gimp_region_select_tool_finalize (GObject *object);
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static void gimp_region_select_tool_button_press (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpButtonPressType press_type,
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GimpDisplay *display);
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static void gimp_region_select_tool_button_release (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpButtonReleaseType release_type,
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GimpDisplay *display);
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static void gimp_region_select_tool_motion (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpDisplay *display);
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static void gimp_region_select_tool_cursor_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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GimpDisplay *display);
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static void gimp_region_select_tool_draw (GimpDrawTool *draw_tool);
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static GdkSegment *gimp_region_select_tool_calculate (GimpRegionSelectTool *region_sel,
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GimpDisplay *display,
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gint *num_segs);
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G_DEFINE_TYPE (GimpRegionSelectTool, gimp_region_select_tool,
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GIMP_TYPE_SELECTION_TOOL)
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#define parent_class gimp_region_select_tool_parent_class
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static void
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gimp_region_select_tool_class_init (GimpRegionSelectToolClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
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GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
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object_class->finalize = gimp_region_select_tool_finalize;
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tool_class->button_press = gimp_region_select_tool_button_press;
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tool_class->button_release = gimp_region_select_tool_button_release;
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tool_class->motion = gimp_region_select_tool_motion;
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tool_class->cursor_update = gimp_region_select_tool_cursor_update;
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draw_tool_class->draw = gimp_region_select_tool_draw;
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}
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static void
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gimp_region_select_tool_init (GimpRegionSelectTool *region_select)
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{
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GimpTool *tool = GIMP_TOOL (region_select);
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gimp_tool_control_set_scroll_lock (tool->control, TRUE);
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gimp_tool_control_set_motion_mode (tool->control, GIMP_MOTION_MODE_COMPRESS);
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region_select->x = 0;
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region_select->y = 0;
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region_select->saved_threshold = 0.0;
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region_select->region_mask = NULL;
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region_select->segs = NULL;
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region_select->num_segs = 0;
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}
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static void
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gimp_region_select_tool_finalize (GObject *object)
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{
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GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (object);
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if (region_sel->region_mask)
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{
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g_object_unref (region_sel->region_mask);
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region_sel->region_mask = NULL;
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}
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if (region_sel->segs)
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{
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g_free (region_sel->segs);
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region_sel->segs = NULL;
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region_sel->num_segs = 0;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gimp_region_select_tool_button_press (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpButtonPressType press_type,
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GimpDisplay *display)
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{
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GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
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GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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region_sel->x = coords->x;
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region_sel->y = coords->y;
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region_sel->saved_threshold = options->threshold;
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gimp_tool_control_activate (tool->control);
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tool->display = display;
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if (gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (region_sel), coords))
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return;
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gimp_tool_push_status (tool, display,
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_("Move the mouse to change threshold"));
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/* calculate the region boundary */
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region_sel->segs = gimp_region_select_tool_calculate (region_sel, display,
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®ion_sel->num_segs);
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gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
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}
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static void
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gimp_region_select_tool_button_release (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpButtonReleaseType release_type,
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GimpDisplay *display)
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{
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GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
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GimpSelectionOptions *sel_options = GIMP_SELECTION_TOOL_GET_OPTIONS (tool);
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GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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GimpImage *image = gimp_display_get_image (display);
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gimp_tool_pop_status (tool, display);
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gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
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gimp_tool_control_halt (tool->control);
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if (release_type != GIMP_BUTTON_RELEASE_CANCEL)
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{
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if (GIMP_SELECTION_TOOL (tool)->function == SELECTION_ANCHOR)
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{
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if (gimp_image_get_floating_selection (image))
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{
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/* If there is a floating selection, anchor it */
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floating_sel_anchor (gimp_image_get_floating_selection (image));
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}
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else
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{
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/* Otherwise, clear the selection mask */
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gimp_channel_clear (gimp_image_get_mask (image), NULL, TRUE);
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}
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gimp_image_flush (image);
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}
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else if (region_sel->region_mask)
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{
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gint off_x = 0;
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gint off_y = 0;
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if (! options->sample_merged)
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{
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GimpDrawable *drawable = gimp_image_get_active_drawable (image);
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gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
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}
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gimp_channel_select_channel (gimp_image_get_mask (image),
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GIMP_REGION_SELECT_TOOL_GET_CLASS (tool)->undo_desc,
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region_sel->region_mask,
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off_x,
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off_y,
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sel_options->operation,
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sel_options->feather,
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sel_options->feather_radius,
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sel_options->feather_radius);
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gimp_image_flush (image);
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}
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}
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if (region_sel->region_mask)
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{
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g_object_unref (region_sel->region_mask);
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region_sel->region_mask = NULL;
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}
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if (region_sel->segs)
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{
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g_free (region_sel->segs);
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region_sel->segs = NULL;
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region_sel->num_segs = 0;
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}
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/* Restore the original threshold */
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g_object_set (options,
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"threshold", region_sel->saved_threshold,
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NULL);
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}
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static void
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gimp_region_select_tool_motion (GimpTool *tool,
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const GimpCoords *coords,
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guint32 time,
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GdkModifierType state,
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GimpDisplay *display)
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{
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GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (tool);
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GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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GdkSegment *new_segs;
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gint num_new_segs;
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gint diff_x, diff_y;
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gdouble diff;
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static guint32 last_time = 0;
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/* don't let the events come in too fast, ignore below a delay of 100 ms */
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if (time - last_time < 100)
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return;
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last_time = time;
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diff_x = coords->x - region_sel->x;
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diff_y = coords->y - region_sel->y;
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diff = ((ABS (diff_x) > ABS (diff_y)) ? diff_x : diff_y) / 2.0;
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g_object_set (options,
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"threshold", CLAMP (region_sel->saved_threshold + diff, 0, 255),
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NULL);
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/* calculate the new region boundary */
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new_segs = gimp_region_select_tool_calculate (region_sel, display,
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&num_new_segs);
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
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/* make sure the XSegment array is freed before we assign the new one */
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if (region_sel->segs)
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g_free (region_sel->segs);
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region_sel->segs = new_segs;
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region_sel->num_segs = num_new_segs;
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
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}
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static void
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gimp_region_select_tool_cursor_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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GimpDisplay *display)
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{
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GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_NONE;
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GimpImage *image = gimp_display_get_image (display);
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if (! gimp_image_coords_in_active_pickable (image, coords,
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options->sample_merged, FALSE))
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modifier = GIMP_CURSOR_MODIFIER_BAD;
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gimp_tool_control_set_cursor_modifier (tool->control, modifier);
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GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
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}
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static void
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gimp_region_select_tool_draw (GimpDrawTool *draw_tool)
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{
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GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (draw_tool);
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if (region_sel->segs)
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{
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GimpDisplayShell *shell;
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shell = gimp_display_get_shell (GIMP_TOOL (draw_tool)->display);
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gimp_canvas_draw_segments (GIMP_CANVAS (shell->canvas),
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GIMP_CANVAS_STYLE_XOR,
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region_sel->segs, region_sel->num_segs);
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}
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}
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static GdkSegment *
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gimp_region_select_tool_calculate (GimpRegionSelectTool *region_sel,
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GimpDisplay *display,
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gint *num_segs)
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{
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GimpTool *tool = GIMP_TOOL (region_sel);
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GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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GimpDisplayShell *shell = gimp_display_get_shell (display);
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GdkSegment *segs;
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BoundSeg *bsegs;
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PixelRegion maskPR;
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gimp_display_shell_set_override_cursor (shell, GDK_WATCH);
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if (region_sel->region_mask)
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g_object_unref (region_sel->region_mask);
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region_sel->region_mask =
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GIMP_REGION_SELECT_TOOL_GET_CLASS (region_sel)->get_mask (region_sel,
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display);
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if (! region_sel->region_mask)
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{
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gimp_display_shell_unset_override_cursor (shell);
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*num_segs = 0;
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return NULL;
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}
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/* calculate and allocate a new segment array which represents the
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* boundary of the contiguous region
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*/
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pixel_region_init (&maskPR,
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gimp_drawable_get_tiles (GIMP_DRAWABLE (region_sel->region_mask)),
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0, 0,
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gimp_item_get_width (GIMP_ITEM (region_sel->region_mask)),
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gimp_item_get_height (GIMP_ITEM (region_sel->region_mask)),
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FALSE);
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bsegs = boundary_find (&maskPR, BOUNDARY_WITHIN_BOUNDS,
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0, 0,
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gimp_item_get_width (GIMP_ITEM (region_sel->region_mask)),
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gimp_item_get_height (GIMP_ITEM (region_sel->region_mask)),
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BOUNDARY_HALF_WAY,
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num_segs);
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segs = g_new (GdkSegment, *num_segs);
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gimp_display_shell_transform_segments (shell, bsegs, segs, *num_segs,
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! options->sample_merged);
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g_free (bsegs);
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gimp_display_shell_unset_override_cursor (shell);
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return segs;
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}
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