mirror of https://github.com/GNOME/gimp.git
501 lines
18 KiB
C
501 lines
18 KiB
C
/* The GIMP -- an 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include "libgimpbase/gimpbase.h"
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#include "core-types.h"
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#include "gimpchannel.h"
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#include "gimpchannel-select.h"
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#include "gimpchannel-combine.h"
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#include "gimpimage-contiguous-region.h"
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#include "gimpscanconvert.h"
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#include "vectors/gimpstroke.h"
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#include "vectors/gimpvectors.h"
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#include "gimp-intl.h"
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/* basic selection functions */
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void
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gimp_channel_select_rectangle (GimpChannel *channel,
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gint x,
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gint y,
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gint w,
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gint h,
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GimpChannelOps op,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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gimp_channel_push_undo (channel, _("Rectangle Select"));
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/* if applicable, replace the current selection */
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if (op == GIMP_CHANNEL_OP_REPLACE)
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gimp_channel_clear (channel, NULL, FALSE);
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/* if feathering for rect, make a new mask with the
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* rectangle and feather that with the old mask
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*/
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if (feather || op == GIMP_CHANNEL_OP_INTERSECT)
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{
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GimpItem *item = GIMP_ITEM (channel);
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GimpChannel *add_on;
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add_on = gimp_channel_new_mask (gimp_item_get_image (item),
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gimp_item_width (item),
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gimp_item_height (item));
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gimp_channel_combine_rect (add_on, GIMP_CHANNEL_OP_ADD, x, y, w, h);
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if (feather)
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gimp_channel_feather (add_on,
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feather_radius_x,
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feather_radius_y,
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FALSE /* no undo */);
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gimp_channel_combine_mask (channel, add_on, op, 0, 0);
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g_object_unref (add_on);
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}
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else
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{
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gimp_channel_combine_rect (channel, op, x, y, w, h);
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}
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}
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void
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gimp_channel_select_ellipse (GimpChannel *channel,
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gint x,
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gint y,
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gint w,
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gint h,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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gimp_channel_push_undo (channel, _("Ellipse Select"));
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/* if applicable, replace the current selection */
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if (op == GIMP_CHANNEL_OP_REPLACE)
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gimp_channel_clear (channel, NULL, FALSE);
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/* if feathering for rect, make a new mask with the
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* rectangle and feather that with the old mask
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*/
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if (feather || op == GIMP_CHANNEL_OP_INTERSECT)
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{
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GimpItem *item = GIMP_ITEM (channel);
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GimpChannel *add_on;
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add_on = gimp_channel_new_mask (gimp_item_get_image (item),
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gimp_item_width (item),
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gimp_item_height (item));
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gimp_channel_combine_ellipse (add_on, GIMP_CHANNEL_OP_ADD,
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x, y, w, h, antialias);
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if (feather)
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gimp_channel_feather (add_on,
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feather_radius_x,
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feather_radius_y,
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FALSE /* no undo */);
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gimp_channel_combine_mask (channel, add_on, op, 0, 0);
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g_object_unref (add_on);
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}
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else
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{
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gimp_channel_combine_ellipse (channel, op, x, y, w, h, antialias);
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}
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}
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/* select by GimpScanConvert functions */
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void
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gimp_channel_select_scan_convert (GimpChannel *channel,
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const gchar *undo_desc,
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GimpScanConvert *scan_convert,
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gint offset_x,
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gint offset_y,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpItem *item;
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GimpChannel *add_on;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (undo_desc != NULL);
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g_return_if_fail (scan_convert != NULL);
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gimp_channel_push_undo (channel, undo_desc);
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/* if applicable, replace the current selection */
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if (op == GIMP_CHANNEL_OP_REPLACE)
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gimp_channel_clear (channel, NULL, FALSE);
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item = GIMP_ITEM (channel);
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add_on = gimp_channel_new_mask (gimp_item_get_image (item),
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gimp_item_width (item),
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gimp_item_height (item));
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gimp_scan_convert_render (scan_convert,
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gimp_drawable_get_tiles (GIMP_DRAWABLE (add_on)),
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offset_x, offset_y, antialias);
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if (feather)
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gimp_channel_feather (add_on,
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feather_radius_x,
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feather_radius_y,
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FALSE /* no undo */);
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gimp_channel_combine_mask (channel, add_on, op, 0, 0);
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g_object_unref (add_on);
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}
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void
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gimp_channel_select_polygon (GimpChannel *channel,
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const gchar *undo_desc,
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gint n_points,
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GimpVector2 *points,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpScanConvert *scan_convert;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (undo_desc != NULL);
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scan_convert = gimp_scan_convert_new ();
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gimp_scan_convert_add_polyline (scan_convert, n_points, points, TRUE);
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gimp_channel_select_scan_convert (channel, undo_desc, scan_convert, 0, 0,
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op, antialias, feather,
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feather_radius_x, feather_radius_y);
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gimp_scan_convert_free (scan_convert);
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}
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void
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gimp_channel_select_vectors (GimpChannel *channel,
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const gchar *undo_desc,
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GimpVectors *vectors,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpScanConvert *scan_convert;
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GList *stroke;
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gboolean coords_added = FALSE;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (undo_desc != NULL);
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g_return_if_fail (GIMP_IS_VECTORS (vectors));
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scan_convert = gimp_scan_convert_new ();
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for (stroke = vectors->strokes; stroke; stroke = stroke->next)
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{
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GArray *coords;
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gboolean closed;
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coords = gimp_stroke_interpolate (GIMP_STROKE (stroke->data),
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1.0, &closed);
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if (coords && coords->len)
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{
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GimpVector2 *points;
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gint i;
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points = g_new0 (GimpVector2, coords->len);
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for (i = 0; i < coords->len; i++)
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{
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points[i].x = g_array_index (coords, GimpCoords, i).x;
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points[i].y = g_array_index (coords, GimpCoords, i).y;
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}
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gimp_scan_convert_add_polyline (scan_convert, coords->len,
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points, TRUE);
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coords_added = TRUE;
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g_free (points);
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}
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if (coords)
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g_array_free (coords, TRUE);
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}
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if (coords_added)
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gimp_channel_select_scan_convert (channel, undo_desc, scan_convert, 0, 0,
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op, antialias, feather,
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feather_radius_x, feather_radius_y);
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gimp_scan_convert_free (scan_convert);
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}
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/* select by GimpChannel functions */
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void
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gimp_channel_select_channel (GimpChannel *channel,
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const gchar *undo_desc,
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GimpChannel *add_on,
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gint offset_x,
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gint offset_y,
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GimpChannelOps op,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (undo_desc != NULL);
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g_return_if_fail (GIMP_IS_CHANNEL (add_on));
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gimp_channel_push_undo (channel, undo_desc);
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/* if applicable, replace the current selection */
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if (op == GIMP_CHANNEL_OP_REPLACE)
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gimp_channel_clear (channel, NULL, FALSE);
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if (feather || op == GIMP_CHANNEL_OP_INTERSECT)
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{
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GimpItem *item = GIMP_ITEM (channel);
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GimpChannel *add_on2;
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add_on2 = gimp_channel_new_mask (gimp_item_get_image (item),
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gimp_item_width (item),
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gimp_item_height (item));
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gimp_channel_combine_mask (add_on2, add_on, GIMP_CHANNEL_OP_ADD,
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offset_x, offset_y);
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if (feather)
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gimp_channel_feather (add_on2,
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feather_radius_x,
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feather_radius_y,
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FALSE /* no undo */);
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gimp_channel_combine_mask (channel, add_on2, op, 0, 0);
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g_object_unref (add_on2);
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}
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else
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{
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gimp_channel_combine_mask (channel, add_on, op, offset_x, offset_y);
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}
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}
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void
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gimp_channel_select_alpha (GimpChannel *channel,
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GimpDrawable *drawable,
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GimpChannelOps op,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpItem *item;
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GimpChannel *add_on;
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gint off_x, off_y;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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item = GIMP_ITEM (channel);
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if (gimp_drawable_has_alpha (drawable))
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{
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add_on = gimp_channel_new_from_alpha (gimp_item_get_image (item),
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drawable, NULL, NULL);
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}
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else
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{
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/* no alpha is equivalent to completely opaque alpha,
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* so simply select the whole layer's extents. --mitch
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*/
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add_on = gimp_channel_new_mask (gimp_item_get_image (item),
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gimp_item_width (GIMP_ITEM (drawable)),
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gimp_item_height (GIMP_ITEM (drawable)));
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gimp_channel_all (add_on, FALSE);
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}
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gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
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gimp_channel_select_channel (channel, _("Alpha to Selection"), add_on,
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off_x, off_y,
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op, feather,
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feather_radius_x,
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feather_radius_y);
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g_object_unref (add_on);
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}
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void
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gimp_channel_select_component (GimpChannel *channel,
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GimpChannelType component,
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GimpChannelOps op,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpItem *item;
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GimpChannel *add_on;
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const gchar *desc;
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gchar *undo_desc;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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item = GIMP_ITEM (channel);
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add_on = gimp_channel_new_from_component (gimp_item_get_image (item),
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component, NULL, NULL);
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if (feather)
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gimp_channel_feather (add_on,
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feather_radius_x,
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feather_radius_y,
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FALSE /* no undo */);
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gimp_enum_get_value (GIMP_TYPE_CHANNEL_TYPE, component,
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NULL, NULL, &desc, NULL);
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undo_desc = g_strdup_printf (_("%s Channel to Selection"), desc);
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gimp_channel_select_channel (channel, undo_desc, add_on,
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0, 0, op,
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FALSE, 0.0, 0.0);
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g_free (undo_desc);
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g_object_unref (add_on);
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}
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void
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gimp_channel_select_fuzzy (GimpChannel *channel,
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GimpDrawable *drawable,
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gboolean sample_merged,
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gint x,
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gint y,
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gint threshold,
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gboolean select_transparent,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpItem *item;
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GimpChannel *add_on;
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gint add_on_x = 0;
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gint add_on_y = 0;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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item = GIMP_ITEM (channel);
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add_on = gimp_image_contiguous_region_by_seed (gimp_item_get_image (item),
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drawable,
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sample_merged,
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antialias,
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threshold,
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select_transparent,
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x, y);
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if (! sample_merged)
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gimp_item_offsets (GIMP_ITEM (drawable), &add_on_x, &add_on_y);
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gimp_channel_select_channel (channel, _("Fuzzy Select"),
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add_on, add_on_x, add_on_y,
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op,
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feather,
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feather_radius_x,
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feather_radius_y);
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g_object_unref (add_on);
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}
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void
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gimp_channel_select_by_color (GimpChannel *channel,
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GimpDrawable *drawable,
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gboolean sample_merged,
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const GimpRGB *color,
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gint threshold,
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gboolean select_transparent,
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GimpChannelOps op,
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gboolean antialias,
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gboolean feather,
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gdouble feather_radius_x,
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gdouble feather_radius_y)
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{
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GimpItem *item;
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GimpChannel *add_on;
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gint add_on_x = 0;
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gint add_on_y = 0;
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g_return_if_fail (GIMP_IS_CHANNEL (channel));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (color != NULL);
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item = GIMP_ITEM (channel);
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add_on = gimp_image_contiguous_region_by_color (gimp_item_get_image (item),
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drawable,
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sample_merged,
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antialias,
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threshold,
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select_transparent,
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color);
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if (! sample_merged)
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gimp_item_offsets (GIMP_ITEM (drawable), &add_on_x, &add_on_y);
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gimp_channel_select_channel (channel, _("Select by Color"),
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add_on, add_on_x, add_on_y,
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op,
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feather,
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feather_radius_x,
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feather_radius_y);
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g_object_unref (add_on);
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}
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