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gimp/app/core/gimpchannel-select.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "gimpchannel.h"
#include "gimpimage.h"
#include "gimpimage-contiguous-region.h"
#include "gimpimage-mask.h"
#include "gimpimage-mask-select.h"
#include "gimpscanconvert.h"
#include "vectors/gimpstroke.h"
#include "vectors/gimpvectors.h"
#include "libgimp/gimpintl.h"
void
gimp_image_mask_select_rectangle (GimpImage *gimage,
gint x,
gint y,
gint w,
gint h,
GimpChannelOps op,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* if applicable, replace the current selection */
if (op == GIMP_CHANNEL_OP_REPLACE)
gimp_image_mask_clear (gimage, _("Rect Select"));
else
gimp_image_mask_push_undo (gimage, _("Rect Select"));
/* if feathering for rect, make a new mask with the
* rectangle and feather that with the old mask
*/
if (feather || op == GIMP_CHANNEL_OP_INTERSECT)
{
GimpChannel *mask;
mask = gimp_channel_new_mask (gimage, gimage->width, gimage->height);
gimp_channel_combine_rect (mask, GIMP_CHANNEL_OP_ADD, x, y, w, h);
if (feather)
gimp_channel_feather (mask,
feather_radius_x,
feather_radius_y,
FALSE /* no undo */);
gimp_channel_combine_mask (gimp_image_get_mask (gimage), mask, op, 0, 0);
g_object_unref (mask);
}
else
{
gimp_channel_combine_rect (gimp_image_get_mask (gimage), op, x, y, w, h);
}
gimp_image_mask_changed (gimage);
}
void
gimp_image_mask_select_ellipse (GimpImage *gimage,
gint x,
gint y,
gint w,
gint h,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* if applicable, replace the current selection */
if (op == GIMP_CHANNEL_OP_REPLACE)
gimp_image_mask_clear (gimage, _("Ellipse Select"));
else
gimp_image_mask_push_undo (gimage, _("Ellipse Select"));
/* if feathering for rect, make a new mask with the
* rectangle and feather that with the old mask
*/
if (feather || op == GIMP_CHANNEL_OP_INTERSECT)
{
GimpChannel *mask;
mask = gimp_channel_new_mask (gimage, gimage->width, gimage->height);
gimp_channel_combine_ellipse (mask, GIMP_CHANNEL_OP_ADD,
x, y, w, h, antialias);
if (feather)
gimp_channel_feather (mask,
feather_radius_x,
feather_radius_y,
FALSE /* no undo */);
gimp_channel_combine_mask (gimp_image_get_mask (gimage), mask, op, 0, 0);
g_object_unref (mask);
}
else
{
gimp_channel_combine_ellipse (gimp_image_get_mask (gimage), op,
x, y, w, h, antialias);
}
gimp_image_mask_changed (gimage);
}
void
gimp_image_mask_select_polygon (GimpImage *gimage,
const gchar *undo_name,
gint n_points,
GimpVector2 *points,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpScanConvert *scan_convert;
GimpChannel *mask;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* if applicable, replace the current selection
* or insure that a floating selection is anchored down...
*/
if (op == GIMP_CHANNEL_OP_REPLACE)
gimp_image_mask_clear (gimage, undo_name);
else
gimp_image_mask_push_undo (gimage, undo_name);
#define SUPERSAMPLE 3
scan_convert = gimp_scan_convert_new (gimage->width,
gimage->height,
antialias ? SUPERSAMPLE : 1);
gimp_scan_convert_add_points (scan_convert, n_points, points);
mask = gimp_scan_convert_to_channel (scan_convert, gimage);
gimp_scan_convert_free (scan_convert);
#undef SUPERSAMPLE
if (mask)
{
if (feather)
gimp_channel_feather (mask,
feather_radius_x,
feather_radius_y,
FALSE /* no undo */);
gimp_channel_combine_mask (gimp_image_get_mask (gimage), mask, op, 0, 0);
g_object_unref (mask);
}
gimp_image_mask_changed (gimage);
}
void
gimp_image_mask_select_vectors (GimpImage *gimage,
GimpVectors *vectors,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpStroke *stroke;
GArray *coords = NULL;
gboolean closed;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* gimp_stroke_interpolate() may return NULL, so iterate over the
* list of strokes until one returns coords
*/
for (stroke = vectors->strokes; stroke; stroke = stroke->next)
{
coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
if (coords)
break;
}
if (coords)
{
GimpVector2 *points;
gint i;
points = g_new0 (GimpVector2, coords->len);
for (i = 0; i < coords->len; i++)
{
points[i].x = g_array_index (coords, GimpCoords, i).x;
points[i].y = g_array_index (coords, GimpCoords, i).y;
}
gimp_image_mask_select_polygon (GIMP_ITEM (vectors)->gimage,
_("Selection from Path"),
coords->len,
points,
op,
antialias,
feather,
feather_radius_x,
feather_radius_y);
g_array_free (coords, TRUE);
g_free (points);
}
}
void
gimp_image_mask_select_channel (GimpImage *gimage,
const gchar *undo_desc,
GimpChannel *channel,
gint offset_x,
gint offset_y,
GimpChannelOps op,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (GIMP_IS_CHANNEL (channel));
/* if applicable, replace the current selection */
if (op == GIMP_CHANNEL_OP_REPLACE)
gimp_image_mask_clear (gimage, undo_desc);
else
gimp_image_mask_push_undo (gimage, undo_desc);
if (feather)
gimp_channel_feather (channel,
feather_radius_x,
feather_radius_y,
FALSE /* no undo */);
gimp_channel_combine_mask (gimp_image_get_mask (gimage), channel,
op, offset_x, offset_y);
gimp_image_mask_changed (gimage);
}
void
gimp_image_mask_select_fuzzy (GimpImage *gimage,
GimpDrawable *drawable,
gboolean sample_merged,
gint x,
gint y,
gint threshold,
gboolean select_transparent,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpChannel *mask;
gint mask_x;
gint mask_y;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
mask = gimp_image_contiguous_region_by_seed (gimage, drawable,
sample_merged,
antialias,
threshold,
select_transparent,
x, y);
if (sample_merged)
{
mask_x = 0;
mask_y = 0;
}
else
{
gimp_drawable_offsets (drawable, &mask_x, &mask_y);
}
gimp_image_mask_select_channel (gimage,
_("Fuzzy Select"),
mask,
mask_x,
mask_y,
op,
feather,
feather_radius_x,
feather_radius_y);
g_object_unref (mask);
}
void
gimp_image_mask_select_by_color (GimpImage *gimage,
GimpDrawable *drawable,
gboolean sample_merged,
const GimpRGB *color,
gint threshold,
gboolean select_transparent,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpChannel *mask;
gint mask_x;
gint mask_y;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (color != NULL);
mask = gimp_image_contiguous_region_by_color (gimage, drawable,
sample_merged,
antialias,
threshold,
select_transparent,
color);
if (sample_merged)
{
mask_x = 0;
mask_y = 0;
}
else
{
gimp_drawable_offsets (drawable, &mask_x, &mask_y);
}
gimp_image_mask_select_channel (gimage,
_("Select by Color"),
mask,
mask_x,
mask_y,
op,
feather,
feather_radius_x,
feather_radius_y);
g_object_unref (mask);
}
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