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-rw-r--r--app/tools/gimpregionselecttool.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/app/tools/gimpregionselecttool.c b/app/tools/gimpregionselecttool.c
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+++ b/app/tools/gimpregionselecttool.c
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+/* 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "core/gimp-utils.h"
+#include "core/gimpboundary.h"
+#include "core/gimpchannel.h"
+#include "core/gimpchannel-select.h"
+#include "core/gimpimage.h"
+#include "core/gimplayer-floating-selection.h"
+
+#include "display/gimpdisplay.h"
+#include "display/gimpdisplayshell.h"
+#include "display/gimpdisplayshell-cursor.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 void gimp_region_select_tool_get_mask (GimpRegionSelectTool *region_sel,
+ GimpDisplay *display);
+
+
+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);
+
+ 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->n_segs = 0;
+}
+
+static void
+gimp_region_select_tool_finalize (GObject *object)
+{
+ GimpRegionSelectTool *region_sel = GIMP_REGION_SELECT_TOOL (object);
+
+ g_clear_object (&region_sel->region_mask);
+
+ g_clear_pointer (&region_sel->segs, g_free);
+ region_sel->n_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;
+
+ if (gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (region_sel),
+ display, coords))
+ {
+ return;
+ }
+
+ gimp_tool_control_activate (tool->control);
+ tool->display = display;
+
+ gimp_tool_push_status (tool, display,
+ _("Move the mouse to change threshold"));
+
+ gimp_region_select_tool_get_mask (region_sel, display);
+
+ 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 (options->draw_mask)
+ gimp_display_shell_set_mask (gimp_display_get_shell (display),
+ NULL, 0, 0, NULL, FALSE);
+
+ 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_buffer (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);
+ }
+ }
+
+ g_clear_object (&region_sel->region_mask);
+
+ g_clear_pointer (&region_sel->segs, g_free);
+ region_sel->n_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);
+ 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);
+
+ gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
+
+ gimp_region_select_tool_get_mask (region_sel, display);
+
+ 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,
+ FALSE, 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);
+ GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (draw_tool);
+
+ if (! options->draw_mask && region_sel->region_mask)
+ {
+ if (! region_sel->segs)
+ {
+ /* calculate and allocate a new segment array which represents
+ * the boundary of the contiguous region
+ */
+ region_sel->segs = gimp_boundary_find (region_sel->region_mask, NULL,
+ babl_format ("Y float"),
+ GIMP_BOUNDARY_WITHIN_BOUNDS,
+ 0, 0,
+ gegl_buffer_get_width (region_sel->region_mask),
+ gegl_buffer_get_height (region_sel->region_mask),
+ GIMP_BOUNDARY_HALF_WAY,
+ &region_sel->n_segs);
+
+ }
+
+ if (region_sel->segs)
+ {
+ gint off_x = 0;
+ gint off_y = 0;
+
+ if (! options->sample_merged)
+ {
+ GimpImage *image = gimp_display_get_image (draw_tool->display);
+ GimpDrawable *drawable = gimp_image_get_active_drawable (image);
+
+ gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
+ }
+
+ gimp_draw_tool_add_boundary (draw_tool,
+ region_sel->segs,
+ region_sel->n_segs,
+ NULL,
+ off_x, off_y);
+ }
+ }
+}
+
+static void
+gimp_region_select_tool_get_mask (GimpRegionSelectTool *region_sel,
+ GimpDisplay *display)
+{
+ GimpRegionSelectOptions *options = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (region_sel);
+ GimpDisplayShell *shell = gimp_display_get_shell (display);
+
+ gimp_display_shell_set_override_cursor (shell, (GimpCursorType) GDK_WATCH);
+
+ g_clear_pointer (&region_sel->segs, g_free);
+ region_sel->n_segs = 0;
+
+ 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 (options->draw_mask)
+ {
+ if (region_sel->region_mask)
+ {
+ GimpRGB color = { 1.0, 0.0, 1.0, 1.0 };
+ gint off_x = 0;
+ gint off_y = 0;
+
+ if (! options->sample_merged)
+ {
+ GimpImage *image = gimp_display_get_image (display);
+ GimpDrawable *drawable = gimp_image_get_active_drawable (image);
+
+ gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
+ }
+
+ gimp_display_shell_set_mask (shell, region_sel->region_mask,
+ off_x, off_y, &color, FALSE);
+ }
+ else
+ {
+ gimp_display_shell_set_mask (shell, NULL, 0, 0, NULL, FALSE);
+ }
+ }
+
+ gimp_display_shell_unset_override_cursor (shell);
+}
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