400 lines
15 KiB
C
400 lines
15 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikaregionselecttool.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 <https://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 "libpikawidgets/pikawidgets.h"
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#include "tools-types.h"
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#include "core/pika-utils.h"
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#include "core/pikaboundary.h"
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#include "core/pikachannel.h"
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#include "core/pikachannel-select.h"
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#include "core/pikaimage.h"
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#include "core/pikalayer-floating-selection.h"
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#include "display/pikadisplay.h"
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#include "display/pikadisplayshell.h"
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#include "display/pikadisplayshell-cursor.h"
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#include "pikaregionselectoptions.h"
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#include "pikaregionselecttool.h"
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#include "pikatoolcontrol.h"
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#include "pika-intl.h"
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static void pika_region_select_tool_finalize (GObject *object);
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static void pika_region_select_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display);
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static void pika_region_select_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display);
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static void pika_region_select_tool_motion (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_region_select_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_region_select_tool_draw (PikaDrawTool *draw_tool);
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static void pika_region_select_tool_get_mask (PikaRegionSelectTool *region_sel,
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PikaDisplay *display);
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G_DEFINE_TYPE (PikaRegionSelectTool, pika_region_select_tool,
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PIKA_TYPE_SELECTION_TOOL)
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#define parent_class pika_region_select_tool_parent_class
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static void
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pika_region_select_tool_class_init (PikaRegionSelectToolClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
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PikaDrawToolClass *draw_tool_class = PIKA_DRAW_TOOL_CLASS (klass);
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object_class->finalize = pika_region_select_tool_finalize;
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tool_class->button_press = pika_region_select_tool_button_press;
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tool_class->button_release = pika_region_select_tool_button_release;
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tool_class->motion = pika_region_select_tool_motion;
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tool_class->cursor_update = pika_region_select_tool_cursor_update;
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draw_tool_class->draw = pika_region_select_tool_draw;
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}
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static void
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pika_region_select_tool_init (PikaRegionSelectTool *region_select)
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{
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PikaTool *tool = PIKA_TOOL (region_select);
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pika_tool_control_set_scroll_lock (tool->control, TRUE);
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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->n_segs = 0;
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}
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static void
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pika_region_select_tool_finalize (GObject *object)
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{
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PikaRegionSelectTool *region_sel = PIKA_REGION_SELECT_TOOL (object);
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g_clear_object (®ion_sel->region_mask);
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g_clear_pointer (®ion_sel->segs, g_free);
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region_sel->n_segs = 0;
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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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pika_region_select_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display)
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{
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PikaRegionSelectTool *region_sel = PIKA_REGION_SELECT_TOOL (tool);
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PikaRegionSelectOptions *options = PIKA_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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if (pika_selection_tool_start_edit (PIKA_SELECTION_TOOL (region_sel),
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display, coords))
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{
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return;
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}
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pika_tool_control_activate (tool->control);
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tool->display = display;
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pika_tool_push_status (tool, display,
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_("Move the mouse to change threshold"));
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pika_region_select_tool_get_mask (region_sel, display);
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pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
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}
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static void
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pika_region_select_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display)
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{
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PikaRegionSelectTool *region_sel = PIKA_REGION_SELECT_TOOL (tool);
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PikaSelectionOptions *sel_options = PIKA_SELECTION_TOOL_GET_OPTIONS (tool);
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PikaRegionSelectOptions *options = PIKA_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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PikaImage *image = pika_display_get_image (display);
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pika_tool_pop_status (tool, display);
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pika_draw_tool_stop (PIKA_DRAW_TOOL (tool));
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pika_tool_control_halt (tool->control);
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if (options->draw_mask)
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pika_display_shell_set_mask (pika_display_get_shell (display),
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NULL, 0, 0, NULL, FALSE);
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if (release_type != PIKA_BUTTON_RELEASE_CANCEL)
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{
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if (PIKA_SELECTION_TOOL (tool)->function == SELECTION_ANCHOR)
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{
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if (pika_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 (pika_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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pika_channel_clear (pika_image_get_mask (image), NULL, TRUE);
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}
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pika_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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GList *drawables = pika_image_get_selected_drawables (image);
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if (g_list_length (drawables) == 1)
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pika_item_get_offset (drawables->data, &off_x, &off_y);
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g_list_free (drawables);
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}
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pika_channel_select_buffer (pika_image_get_mask (image),
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PIKA_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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pika_image_flush (image);
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}
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}
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g_clear_object (®ion_sel->region_mask);
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g_clear_pointer (®ion_sel->segs, g_free);
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region_sel->n_segs = 0;
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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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pika_region_select_tool_motion (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaRegionSelectTool *region_sel = PIKA_REGION_SELECT_TOOL (tool);
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PikaRegionSelectOptions *options = PIKA_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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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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pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
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pika_region_select_tool_get_mask (region_sel, display);
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pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
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}
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static void
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pika_region_select_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaRegionSelectOptions *options = PIKA_REGION_SELECT_TOOL_GET_OPTIONS (tool);
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PikaCursorModifier modifier = PIKA_CURSOR_MODIFIER_NONE;
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PikaImage *image = pika_display_get_image (display);
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if (! pika_image_coords_in_active_pickable (image, coords,
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FALSE, options->sample_merged,
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FALSE))
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modifier = PIKA_CURSOR_MODIFIER_BAD;
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pika_tool_control_set_cursor_modifier (tool->control, modifier);
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PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
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}
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static void
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pika_region_select_tool_draw (PikaDrawTool *draw_tool)
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{
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PikaRegionSelectTool *region_sel = PIKA_REGION_SELECT_TOOL (draw_tool);
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PikaRegionSelectOptions *options = PIKA_REGION_SELECT_TOOL_GET_OPTIONS (draw_tool);
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if (! options->draw_mask && region_sel->region_mask)
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{
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if (! region_sel->segs)
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{
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/* calculate and allocate a new segment array which represents
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* the boundary of the contiguous region
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*/
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region_sel->segs = pika_boundary_find (region_sel->region_mask, NULL,
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babl_format ("Y float"),
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PIKA_BOUNDARY_WITHIN_BOUNDS,
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0, 0,
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gegl_buffer_get_width (region_sel->region_mask),
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gegl_buffer_get_height (region_sel->region_mask),
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PIKA_BOUNDARY_HALF_WAY,
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®ion_sel->n_segs);
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}
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if (region_sel->segs)
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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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PikaImage *image = pika_display_get_image (draw_tool->display);
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GList *drawables = pika_image_get_selected_drawables (image);
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if (g_list_length (drawables) == 1)
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pika_item_get_offset (drawables->data, &off_x, &off_y);
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g_list_free (drawables);
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}
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pika_draw_tool_add_boundary (draw_tool,
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region_sel->segs,
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region_sel->n_segs,
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NULL,
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off_x, off_y);
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}
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}
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}
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static void
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pika_region_select_tool_get_mask (PikaRegionSelectTool *region_sel,
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PikaDisplay *display)
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{
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PikaRegionSelectOptions *options = PIKA_REGION_SELECT_TOOL_GET_OPTIONS (region_sel);
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PikaDisplayShell *shell = pika_display_get_shell (display);
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pika_display_shell_set_override_cursor (shell, (PikaCursorType) GDK_WATCH);
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g_clear_pointer (®ion_sel->segs, g_free);
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region_sel->n_segs = 0;
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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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PIKA_REGION_SELECT_TOOL_GET_CLASS (region_sel)->get_mask (region_sel,
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display);
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if (options->draw_mask)
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{
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if (region_sel->region_mask)
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{
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PikaRGB color = { 1.0, 0.0, 1.0, 1.0 };
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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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PikaImage *image = pika_display_get_image (display);
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GList *drawables = pika_image_get_selected_drawables (image);
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if (g_list_length (drawables) == 1)
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pika_item_get_offset (drawables->data, &off_x, &off_y);
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g_list_free (drawables);
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}
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pika_display_shell_set_mask (shell, region_sel->region_mask,
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off_x, off_y, &color, FALSE);
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}
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else
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{
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pika_display_shell_set_mask (shell, NULL, 0, 0, NULL, FALSE);
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}
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}
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pika_display_shell_unset_override_cursor (shell);
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}
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