mirror of https://github.com/GNOME/gimp.git
238 lines
6.8 KiB
C
238 lines
6.8 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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* 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 <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libgimpmath/gimpmath.h"
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#include "core-types.h"
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#include "gimp.h"
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#include "gimpimage.h"
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#include "gimpimage-private.h"
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#include "gimpimage-sample-points.h"
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#include "gimpimage-undo-push.h"
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#include "gimpsamplepoint.h"
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#include "gimp-intl.h"
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/* public functions */
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GimpSamplePoint *
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gimp_image_add_sample_point_at_pos (GimpImage *image,
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gint x,
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gint y,
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gboolean push_undo)
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{
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GimpSamplePoint *sample_point;
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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g_return_val_if_fail (x >= 0 && x < gimp_image_get_width (image), NULL);
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g_return_val_if_fail (y >= 0 && y < gimp_image_get_height (image), NULL);
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sample_point = gimp_sample_point_new (image->gimp->next_sample_point_ID++);
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if (push_undo)
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gimp_image_undo_push_sample_point (image, C_("undo-type", "Add Sample Point"),
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sample_point);
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gimp_image_add_sample_point (image, sample_point, x, y);
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gimp_sample_point_unref (sample_point);
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return sample_point;
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}
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void
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gimp_image_add_sample_point (GimpImage *image,
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GimpSamplePoint *sample_point,
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gint x,
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gint y)
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{
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GimpImagePrivate *private;
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g_return_if_fail (GIMP_IS_IMAGE (image));
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g_return_if_fail (sample_point != NULL);
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private = GIMP_IMAGE_GET_PRIVATE (image);
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private->sample_points = g_list_append (private->sample_points, sample_point);
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gimp_sample_point_set_position (sample_point, x, y);
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gimp_sample_point_ref (sample_point);
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gimp_image_sample_point_added (image, sample_point);
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}
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void
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gimp_image_remove_sample_point (GimpImage *image,
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GimpSamplePoint *sample_point,
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gboolean push_undo)
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{
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GimpImagePrivate *private;
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g_return_if_fail (GIMP_IS_IMAGE (image));
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g_return_if_fail (sample_point != NULL);
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private = GIMP_IMAGE_GET_PRIVATE (image);
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if (push_undo)
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gimp_image_undo_push_sample_point (image,
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C_("undo-type", "Remove Sample Point"),
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sample_point);
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private->sample_points = g_list_remove (private->sample_points, sample_point);
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gimp_image_sample_point_removed (image, sample_point);
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gimp_sample_point_set_position (sample_point, -1, -1);
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gimp_sample_point_unref (sample_point);
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}
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void
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gimp_image_move_sample_point (GimpImage *image,
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GimpSamplePoint *sample_point,
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gint x,
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gint y,
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gboolean push_undo)
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{
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g_return_if_fail (GIMP_IS_IMAGE (image));
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g_return_if_fail (sample_point != NULL);
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g_return_if_fail (x >= 0);
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g_return_if_fail (y >= 0);
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g_return_if_fail (x < gimp_image_get_width (image));
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g_return_if_fail (y < gimp_image_get_height (image));
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if (push_undo)
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gimp_image_undo_push_sample_point (image,
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C_("undo-type", "Move Sample Point"),
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sample_point);
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gimp_sample_point_set_position (sample_point, x, y);
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gimp_image_sample_point_moved (image, sample_point);
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}
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GList *
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gimp_image_get_sample_points (GimpImage *image)
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{
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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return GIMP_IMAGE_GET_PRIVATE (image)->sample_points;
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}
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GimpSamplePoint *
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gimp_image_get_sample_point (GimpImage *image,
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guint32 id)
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{
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GList *sample_points;
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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for (sample_points = GIMP_IMAGE_GET_PRIVATE (image)->sample_points;
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sample_points;
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sample_points = g_list_next (sample_points))
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{
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GimpSamplePoint *sample_point = sample_points->data;
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if (gimp_sample_point_get_ID (sample_point) == id)
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return sample_point;
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}
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return NULL;
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}
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GimpSamplePoint *
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gimp_image_get_next_sample_point (GimpImage *image,
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guint32 id,
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gboolean *sample_point_found)
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{
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GList *sample_points;
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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g_return_val_if_fail (sample_point_found != NULL, NULL);
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if (id == 0)
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*sample_point_found = TRUE;
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else
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*sample_point_found = FALSE;
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for (sample_points = GIMP_IMAGE_GET_PRIVATE (image)->sample_points;
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sample_points;
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sample_points = g_list_next (sample_points))
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{
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GimpSamplePoint *sample_point = sample_points->data;
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if (*sample_point_found) /* this is the first guide after the found one */
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return sample_point;
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if (gimp_sample_point_get_ID (sample_point) == id) /* found it, next one will be returned */
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*sample_point_found = TRUE;
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}
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return NULL;
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}
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GimpSamplePoint *
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gimp_image_find_sample_point (GimpImage *image,
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gdouble x,
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gdouble y,
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gdouble epsilon_x,
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gdouble epsilon_y)
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{
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GList *list;
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GimpSamplePoint *ret = NULL;
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gdouble mindist = G_MAXDOUBLE;
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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g_return_val_if_fail (epsilon_x > 0 && epsilon_y > 0, NULL);
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if (x < 0 || x >= gimp_image_get_width (image) ||
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y < 0 || y >= gimp_image_get_height (image))
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{
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return NULL;
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}
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for (list = GIMP_IMAGE_GET_PRIVATE (image)->sample_points;
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list;
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list = g_list_next (list))
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{
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GimpSamplePoint *sample_point = list->data;
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gint sp_x;
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gint sp_y;
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gdouble dist;
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gimp_sample_point_get_position (sample_point, &sp_x, &sp_y);
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if (sp_x < 0 || sp_y < 0)
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continue;
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dist = hypot ((sp_x + 0.5) - x,
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(sp_y + 0.5) - y);
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if (dist < MIN (epsilon_y, mindist))
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{
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mindist = dist;
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ret = sample_point;
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}
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}
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return ret;
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}
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