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gimp/app/core/gimpchannel.c
Michael Natterer d25406c924 app/core/gimpchannel.c (gimp_channel_bounds) allow to pass in NULL return 
2006-08-03  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpchannel.c (gimp_channel_bounds)
	* app/core/gimpdrawable.c (gimp_drawable_mask_bounds)
	(gimp_drawable_mask_intersect): allow to pass in NULL return
	locations for any of the boundary return values.

	* app/tools/gimpselectiontool.c (gimp_selection_tool_oper_update):
	don't require hovering the selection for moving the selected
	pixels, since this can be distinguished by looking at the
	modifiers now. Check for the presence of any selected pixels
	instead. Fixes bug #349341.
2006-08-03 18:17:42 +00:00

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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 <string.h>
#include <glib-object.h>
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "base/boundary.h"
#include "base/gimplut.h"
#include "base/lut-funcs.h"
#include "base/pixel-processor.h"
#include "base/pixel-region.h"
#include "base/tile.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "paint/gimppaintcore-stroke.h"
#include "paint/gimppaintoptions.h"
#include "gimp.h"
#include "gimp-utils.h"
#include "gimpcontainer.h"
#include "gimpdrawable-convert.h"
#include "gimpimage.h"
#include "gimpimage-quick-mask.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimpchannel.h"
#include "gimpcontext.h"
#include "gimpdrawable-stroke.h"
#include "gimpmarshal.h"
#include "gimppaintinfo.h"
#include "gimppickable.h"
#include "gimpstrokedesc.h"
#include "gimp-intl.h"
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
static void gimp_channel_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_channel_finalize (GObject *object);
static gint64 gimp_channel_get_memsize (GimpObject *object,
gint64 *gui_size);
static gchar * gimp_channel_get_description (GimpViewable *viewable,
gchar **tooltip);
static gboolean gimp_channel_is_attached (GimpItem *item);
static GimpItem * gimp_channel_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha);
static void gimp_channel_convert (GimpItem *item,
GimpImage *dest_image);
static void gimp_channel_translate (GimpItem *item,
gint off_x,
gint off_y,
gboolean push_undo);
static void gimp_channel_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress);
static void gimp_channel_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offx,
gint offy);
static void gimp_channel_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean flip_result);
static void gimp_channel_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType flip_type,
gdouble center_x,
gdouble center_y,
gboolean flip_result);
static void gimp_channel_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean supersample,
gint recursion_level,
gboolean clip_result,
GimpProgress *progress);
static gboolean gimp_channel_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeDesc *stroke_desc);
static void gimp_channel_invalidate_boundary (GimpDrawable *drawable);
static void gimp_channel_get_active_components (const GimpDrawable *drawable,
gboolean *active);
static void gimp_channel_apply_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
GimpLayerModeEffects mode,
TileManager *src1_tiles,
gint x,
gint y);
static void gimp_channel_replace_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
PixelRegion *maskPR,
gint x,
gint y);
static void gimp_channel_set_tiles (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
TileManager *tiles,
GimpImageType type,
gint offset_x,
gint offset_y);
static void gimp_channel_swap_pixels (GimpDrawable *drawable,
TileManager *tiles,
gboolean sparse,
gint x,
gint y,
gint width,
gint height);
static gint gimp_channel_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static gboolean gimp_channel_real_boundary (GimpChannel *channel,
const BoundSeg **segs_in,
const BoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2);
static gboolean gimp_channel_real_bounds (GimpChannel *channel,
gint *x1,
gint *y1,
gint *x2,
gint *y2);
static gboolean gimp_channel_real_is_empty (GimpChannel *channel);
static void gimp_channel_real_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean push_undo);
static void gimp_channel_real_sharpen (GimpChannel *channel,
gboolean push_undo);
static void gimp_channel_real_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo);
static void gimp_channel_real_all (GimpChannel *channel,
gboolean push_undo);
static void gimp_channel_real_invert (GimpChannel *channel,
gboolean push_undo);
static void gimp_channel_real_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean feather,
gboolean push_undo);
static void gimp_channel_real_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo);
static void gimp_channel_real_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo);
static void gimp_channel_validate (TileManager *tm,
Tile *tile);
G_DEFINE_TYPE_WITH_CODE (GimpChannel, gimp_channel, GIMP_TYPE_DRAWABLE,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
gimp_channel_pickable_iface_init))
#define parent_class gimp_channel_parent_class
static guint channel_signals[LAST_SIGNAL] = { 0 };
static void
gimp_channel_class_init (GimpChannelClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
channel_signals[COLOR_CHANGED] =
g_signal_new ("color-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpChannelClass, color_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_channel_finalize;
gimp_object_class->get_memsize = gimp_channel_get_memsize;
viewable_class->get_description = gimp_channel_get_description;
viewable_class->default_stock_id = "gimp-channel";
item_class->is_attached = gimp_channel_is_attached;
item_class->duplicate = gimp_channel_duplicate;
item_class->convert = gimp_channel_convert;
item_class->translate = gimp_channel_translate;
item_class->scale = gimp_channel_scale;
item_class->resize = gimp_channel_resize;
item_class->flip = gimp_channel_flip;
item_class->rotate = gimp_channel_rotate;
item_class->transform = gimp_channel_transform;
item_class->stroke = gimp_channel_stroke;
item_class->default_name = _("Channel");
item_class->rename_desc = _("Rename Channel");
item_class->translate_desc = _("Move Channel");
item_class->scale_desc = _("Scale Channel");
item_class->resize_desc = _("Resize Channel");
item_class->flip_desc = _("Flip Channel");
item_class->rotate_desc = _("Rotate Channel");
item_class->transform_desc = _("Transform Channel");
item_class->stroke_desc = _("Stroke Channel");
drawable_class->invalidate_boundary = gimp_channel_invalidate_boundary;
drawable_class->get_active_components = gimp_channel_get_active_components;
drawable_class->apply_region = gimp_channel_apply_region;
drawable_class->replace_region = gimp_channel_replace_region;
drawable_class->set_tiles = gimp_channel_set_tiles;
drawable_class->swap_pixels = gimp_channel_swap_pixels;
klass->boundary = gimp_channel_real_boundary;
klass->bounds = gimp_channel_real_bounds;
klass->is_empty = gimp_channel_real_is_empty;
klass->feather = gimp_channel_real_feather;
klass->sharpen = gimp_channel_real_sharpen;
klass->clear = gimp_channel_real_clear;
klass->all = gimp_channel_real_all;
klass->invert = gimp_channel_real_invert;
klass->border = gimp_channel_real_border;
klass->grow = gimp_channel_real_grow;
klass->shrink = gimp_channel_real_shrink;
klass->feather_desc = _("Feather Channel");
klass->sharpen_desc = _("Sharpen Channel");
klass->clear_desc = _("Clear Channel");
klass->all_desc = _("Fill Channel");
klass->invert_desc = _("Invert Channel");
klass->border_desc = _("Border Channel");
klass->grow_desc = _("Grow Channel");
klass->shrink_desc = _("Shrink Channel");
}
static void
gimp_channel_init (GimpChannel *channel)
{
gimp_rgba_set (&channel->color, 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE);
channel->show_masked = FALSE;
/* Selection mask variables */
channel->boundary_known = FALSE;
channel->segs_in = NULL;
channel->segs_out = NULL;
channel->num_segs_in = 0;
channel->num_segs_out = 0;
channel->empty = FALSE;
channel->bounds_known = FALSE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = 0;
channel->y2 = 0;
}
static void
gimp_channel_pickable_iface_init (GimpPickableInterface *iface)
{
iface->get_opacity_at = gimp_channel_get_opacity_at;
}
static void
gimp_channel_finalize (GObject *object)
{
GimpChannel *channel = GIMP_CHANNEL (object);
if (channel->segs_in)
{
g_free (channel->segs_in);
channel->segs_in = NULL;
}
if (channel->segs_out)
{
g_free (channel->segs_out);
channel->segs_out = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_channel_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpChannel *channel = GIMP_CHANNEL (object);
*gui_size += channel->num_segs_in * sizeof (BoundSeg);
*gui_size += channel->num_segs_out * sizeof (BoundSeg);
return GIMP_OBJECT_CLASS (parent_class)->get_memsize (object, gui_size);
}
static gchar *
gimp_channel_get_description (GimpViewable *viewable,
gchar **tooltip)
{
if (! strcmp (GIMP_IMAGE_QUICK_MASK_NAME,
gimp_object_get_name (GIMP_OBJECT (viewable))))
{
return g_strdup (_("Quick Mask"));
}
return GIMP_VIEWABLE_CLASS (parent_class)->get_description (viewable,
tooltip);
}
static gboolean
gimp_channel_is_attached (GimpItem *item)
{
return (GIMP_IS_IMAGE (item->image) &&
gimp_container_have (item->image->channels, GIMP_OBJECT (item)));
}
static GimpItem *
gimp_channel_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
if (g_type_is_a (new_type, GIMP_TYPE_CHANNEL))
add_alpha = FALSE;
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type,
add_alpha);
if (GIMP_IS_CHANNEL (new_item))
{
GimpChannel *channel = GIMP_CHANNEL (item);
GimpChannel *new_channel = GIMP_CHANNEL (new_item);
new_channel->color = channel->color;
new_channel->show_masked = channel->show_masked;
/* selection mask variables */
new_channel->bounds_known = channel->bounds_known;
new_channel->empty = channel->empty;
new_channel->x1 = channel->x1;
new_channel->y1 = channel->y1;
new_channel->x2 = channel->x2;
new_channel->y2 = channel->y2;
}
return new_item;
}
static void
gimp_channel_convert (GimpItem *item,
GimpImage *dest_image)
{
GimpChannel *channel = GIMP_CHANNEL (item);
GimpDrawable *drawable = GIMP_DRAWABLE (item);
GimpImageBaseType old_base_type;
old_base_type = GIMP_IMAGE_TYPE_BASE_TYPE (gimp_drawable_type (drawable));
if (old_base_type != GIMP_GRAY)
{
TileManager *new_tiles;
GimpImageType new_type = GIMP_GRAY_IMAGE;
if (gimp_drawable_has_alpha (drawable))
new_type = GIMP_IMAGE_TYPE_WITH_ALPHA (new_type);
new_tiles = tile_manager_new (gimp_item_width (item),
gimp_item_height (item),
GIMP_IMAGE_TYPE_BYTES (new_type));
gimp_drawable_convert_grayscale (drawable, new_tiles, old_base_type);
gimp_drawable_set_tiles_full (drawable, FALSE, NULL,
new_tiles, new_type,
item->offset_x,
item->offset_y);
tile_manager_unref (new_tiles);
}
if (gimp_drawable_has_alpha (drawable))
{
TileManager *new_tiles;
PixelRegion srcPR;
PixelRegion destPR;
guchar bg[1] = { 0 };
new_tiles = tile_manager_new (gimp_item_width (item),
gimp_item_height (item),
GIMP_IMAGE_TYPE_BYTES (GIMP_GRAY_IMAGE));
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
gimp_item_width (item),
gimp_item_height (item),
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
gimp_item_width (item),
gimp_item_height (item),
TRUE);
flatten_region (&srcPR, &destPR, bg);
gimp_drawable_set_tiles_full (drawable, FALSE, NULL,
new_tiles, GIMP_GRAY_IMAGE,
item->offset_x,
item->offset_y);
tile_manager_unref (new_tiles);
}
if (G_TYPE_FROM_INSTANCE (channel) == GIMP_TYPE_CHANNEL)
{
gint width = gimp_image_get_width (dest_image);
gint height = gimp_image_get_height (dest_image);
item->offset_x = 0;
item->offset_y = 0;
if (gimp_item_width (item) != width ||
gimp_item_height (item) != height)
{
gimp_item_resize (item, gimp_get_user_context (dest_image->gimp),
width, height, 0, 0);
}
}
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image);
}
static void
gimp_channel_translate (GimpItem *item,
gint off_x,
gint off_y,
gboolean push_undo)
{
GimpChannel *channel = GIMP_CHANNEL (item);
GimpChannel *tmp_mask = NULL;
gint width, height;
PixelRegion srcPR, destPR;
guchar empty = TRANSPARENT_OPACITY;
gint x1, y1, x2, y2;
gimp_channel_bounds (channel, &x1, &y1, &x2, &y2);
/* update the old area */
gimp_drawable_update (GIMP_DRAWABLE (item), x1, y1, x2 - x1, y2 - y1);
if (push_undo)
gimp_channel_push_undo (channel, NULL);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
x1 = CLAMP ((x1 + off_x), 0, GIMP_ITEM (channel)->width);
y1 = CLAMP ((y1 + off_y), 0, GIMP_ITEM (channel)->height);
x2 = CLAMP ((x2 + off_x), 0, GIMP_ITEM (channel)->width);
y2 = CLAMP ((y2 + off_y), 0, GIMP_ITEM (channel)->height);
width = x2 - x1;
height = y2 - y1;
/* make sure width and height are non-zero */
if (width != 0 && height != 0)
{
/* copy the portion of the mask we will keep to a
* temporary buffer
*/
tmp_mask = gimp_channel_new_mask (gimp_item_get_image (item),
width, height);
pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles,
x1 - off_x, y1 - off_y, width, height, FALSE);
pixel_region_init (&destPR, GIMP_DRAWABLE (tmp_mask)->tiles,
0, 0, width, height, TRUE);
copy_region (&srcPR, &destPR);
}
/* clear the mask */
pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, TRUE);
color_region (&srcPR, &empty);
if (width != 0 && height != 0)
{
/* copy the temp mask back to the mask */
pixel_region_init (&srcPR, GIMP_DRAWABLE (tmp_mask)->tiles,
0, 0, width, height, FALSE);
pixel_region_init (&destPR, GIMP_DRAWABLE (channel)->tiles,
x1, y1, width, height, TRUE);
copy_region (&srcPR, &destPR);
/* free the temporary mask */
g_object_unref (tmp_mask);
}
/* calculate new bounds */
if (width == 0 || height == 0)
{
channel->empty = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = GIMP_ITEM (channel)->width;
channel->y2 = GIMP_ITEM (channel)->height;
}
else
{
channel->x1 = x1;
channel->y1 = y1;
channel->x2 = x2;
channel->y2 = y2;
}
/* update the new area */
gimp_drawable_update (GIMP_DRAWABLE (item),
channel->x1, channel->y1,
channel->x2 - channel->x1,
channel->y2 - channel->y1);
}
static void
gimp_channel_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
{
new_offset_x = 0;
new_offset_y = 0;
}
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
}
static void
gimp_channel_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GIMP_ITEM_CLASS (parent_class)->resize (item, context, new_width, new_height,
offset_x, offset_y);
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
{
item->offset_x = 0;
item->offset_y = 0;
}
}
static void
gimp_channel_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
clip_result = TRUE;
GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type, axis,
clip_result);
}
static void
gimp_channel_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
/* don't default to clip_result == TRUE here */
GIMP_ITEM_CLASS (parent_class)->rotate (item, context,
rotate_type, center_x, center_y,
clip_result);
}
static void
gimp_channel_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean supersample,
gint recursion_level,
gboolean clip_result,
GimpProgress *progress)
{
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
clip_result = TRUE;
GIMP_ITEM_CLASS (parent_class)->transform (item, context, matrix, direction,
interpolation_type,
supersample, recursion_level,
clip_result, progress);
}
static gboolean
gimp_channel_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeDesc *stroke_desc)
{
GimpChannel *channel = GIMP_CHANNEL (item);
const BoundSeg *segs_in;
const BoundSeg *segs_out;
gint n_segs_in;
gint n_segs_out;
gboolean retval = FALSE;
gint offset_x, offset_y;
if (! gimp_channel_boundary (channel, &segs_in, &segs_out,
&n_segs_in, &n_segs_out,
0, 0, 0, 0))
{
g_message (_("Cannot stroke empty channel."));
return FALSE;
}
gimp_item_offsets (GIMP_ITEM (channel), &offset_x, &offset_y);
switch (stroke_desc->method)
{
case GIMP_STROKE_METHOD_LIBART:
gimp_drawable_stroke_boundary (drawable,
stroke_desc->stroke_options,
segs_in, n_segs_in,
offset_x, offset_y);
retval = TRUE;
break;
case GIMP_STROKE_METHOD_PAINT_CORE:
{
GimpPaintCore *core;
core = g_object_new (stroke_desc->paint_info->paint_type, NULL);
retval = gimp_paint_core_stroke_boundary (core, drawable,
stroke_desc->paint_options,
segs_in, n_segs_in,
offset_x, offset_y);
g_object_unref (core);
}
break;
default:
g_return_val_if_reached (FALSE);
}
return retval;
}
static void
gimp_channel_invalidate_boundary (GimpDrawable *drawable)
{
GIMP_CHANNEL (drawable)->boundary_known = FALSE;
}
static void
gimp_channel_get_active_components (const GimpDrawable *drawable,
gboolean *active)
{
/* Make sure that the alpha channel is not valid. */
active[GRAY_PIX] = TRUE;
active[ALPHA_G_PIX] = FALSE;
}
static void
gimp_channel_apply_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
GimpLayerModeEffects mode,
TileManager *src1_tiles,
gint x,
gint y)
{
gimp_drawable_invalidate_boundary (drawable);
GIMP_DRAWABLE_CLASS (parent_class)->apply_region (drawable, src2PR,
push_undo, undo_desc,
opacity, mode,
src1_tiles,
x, y);
GIMP_CHANNEL (drawable)->bounds_known = FALSE;
}
static void
gimp_channel_replace_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
PixelRegion *maskPR,
gint x,
gint y)
{
gimp_drawable_invalidate_boundary (drawable);
GIMP_DRAWABLE_CLASS (parent_class)->replace_region (drawable, src2PR,
push_undo, undo_desc,
opacity,
maskPR,
x, y);
GIMP_CHANNEL (drawable)->bounds_known = FALSE;
}
static void
gimp_channel_set_tiles (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
TileManager *tiles,
GimpImageType type,
gint offset_x,
gint offset_y)
{
GIMP_DRAWABLE_CLASS (parent_class)->set_tiles (drawable,
push_undo, undo_desc,
tiles, type,
offset_x, offset_y);
GIMP_CHANNEL (drawable)->bounds_known = FALSE;
}
static void
gimp_channel_swap_pixels (GimpDrawable *drawable,
TileManager *tiles,
gboolean sparse,
gint x,
gint y,
gint width,
gint height)
{
gimp_drawable_invalidate_boundary (drawable);
GIMP_DRAWABLE_CLASS (parent_class)->swap_pixels (drawable, tiles, sparse,
x, y, width, height);
GIMP_CHANNEL (drawable)->bounds_known = FALSE;
}
static gint
gimp_channel_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
GimpChannel *channel = GIMP_CHANNEL (pickable);
Tile *tile;
gint val;
/* Some checks to cut back on unnecessary work */
if (channel->bounds_known)
{
if (channel->empty)
return 0;
else if (x < channel->x1 || x >= channel->x2 ||
y < channel->y1 || y >= channel->y2)
return 0;
}
else
{
if (x < 0 || x >= GIMP_ITEM (channel)->width ||
y < 0 || y >= GIMP_ITEM (channel)->height)
return 0;
}
tile = tile_manager_get_tile (GIMP_DRAWABLE (channel)->tiles, x, y,
TRUE, FALSE);
val = *(guchar *) (tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT));
tile_release (tile, FALSE);
return val;
}
static gboolean
gimp_channel_real_boundary (GimpChannel *channel,
const BoundSeg **segs_in,
const BoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2)
{
gint x3, y3, x4, y4;
PixelRegion bPR;
if (! channel->boundary_known)
{
/* free the out of date boundary segments */
if (channel->segs_in)
g_free (channel->segs_in);
if (channel->segs_out)
g_free (channel->segs_out);
if (gimp_channel_bounds (channel, &x3, &y3, &x4, &y4))
{
pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles,
x3, y3, x4 - x3, y4 - y3, FALSE);
channel->segs_out = boundary_find (&bPR, BOUNDARY_IGNORE_BOUNDS,
x1, y1, x2, y2,
BOUNDARY_HALF_WAY,
&channel->num_segs_out);
x1 = MAX (x1, x3);
y1 = MAX (y1, y3);
x2 = MIN (x2, x4);
y2 = MIN (y2, y4);
if (x2 > x1 && y2 > y1)
{
pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, FALSE);
channel->segs_in = boundary_find (&bPR, BOUNDARY_WITHIN_BOUNDS,
x1, y1, x2, y2,
BOUNDARY_HALF_WAY,
&channel->num_segs_in);
}
else
{
channel->segs_in = NULL;
channel->num_segs_in = 0;
}
}
else
{
channel->segs_in = NULL;
channel->segs_out = NULL;
channel->num_segs_in = 0;
channel->num_segs_out = 0;
}
channel->boundary_known = TRUE;
}
*segs_in = channel->segs_in;
*segs_out = channel->segs_out;
*num_segs_in = channel->num_segs_in;
*num_segs_out = channel->num_segs_out;
return TRUE;
}
static gboolean
gimp_channel_real_bounds (GimpChannel *channel,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
PixelRegion maskPR;
guchar *data, *data1;
gint x, y;
gint ex, ey;
gint tx1, tx2, ty1, ty2;
gint minx, maxx;
gpointer pr;
/* if the channel's bounds have already been reliably calculated... */
if (channel->bounds_known)
{
*x1 = channel->x1;
*y1 = channel->y1;
*x2 = channel->x2;
*y2 = channel->y2;
return ! channel->empty;
}
/* go through and calculate the bounds */
tx1 = GIMP_ITEM (channel)->width;
ty1 = GIMP_ITEM (channel)->height;
tx2 = 0;
ty2 = 0;
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, FALSE);
for (pr = pixel_regions_register (1, &maskPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
data1 = data = maskPR.data;
ex = maskPR.x + maskPR.w;
ey = maskPR.y + maskPR.h;
/* only check the pixels if this tile is not fully within the
* currently computed bounds
*/
if (maskPR.x < tx1 || ex > tx2 ||
maskPR.y < ty1 || ey > ty2)
{
/* Check upper left and lower right corners to see if we can
* avoid checking the rest of the pixels in this tile
*/
if (data[0] && data[maskPR.rowstride*(maskPR.h - 1) + maskPR.w - 1])
{
if (maskPR.x < tx1)
tx1 = maskPR.x;
if (ex > tx2)
tx2 = ex;
if (maskPR.y < ty1)
ty1 = maskPR.y;
if (ey > ty2)
ty2 = ey;
}
else
{
for (y = maskPR.y; y < ey; y++, data1 += maskPR.rowstride)
{
for (x = maskPR.x, data = data1; x < ex; x++, data++)
{
if (*data)
{
minx = x;
maxx = x;
for (; x < ex; x++, data++)
if (*data)
maxx = x;
if (minx < tx1)
tx1 = minx;
if (maxx > tx2)
tx2 = maxx;
if (y < ty1)
ty1 = y;
if (y > ty2)
ty2 = y;
}
}
}
}
}
}
tx2 = CLAMP (tx2 + 1, 0, GIMP_ITEM (channel)->width);
ty2 = CLAMP (ty2 + 1, 0, GIMP_ITEM (channel)->height);
if (tx1 == GIMP_ITEM (channel)->width && ty1 == GIMP_ITEM (channel)->height)
{
channel->empty = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = GIMP_ITEM (channel)->width;
channel->y2 = GIMP_ITEM (channel)->height;
}
else
{
channel->empty = FALSE;
channel->x1 = tx1;
channel->y1 = ty1;
channel->x2 = tx2;
channel->y2 = ty2;
}
channel->bounds_known = TRUE;
*x1 = channel->x1;
*x2 = channel->x2;
*y1 = channel->y1;
*y2 = channel->y2;
return ! channel->empty;
}
static gboolean
gimp_channel_real_is_empty (GimpChannel *channel)
{
PixelRegion maskPR;
guchar *data;
gint x, y;
gpointer pr;
if (channel->bounds_known)
return channel->empty;
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, FALSE);
for (pr = pixel_regions_register (1, &maskPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
/* check if any pixel in the channel is non-zero */
data = maskPR.data;
for (y = 0; y < maskPR.h; y++)
for (x = 0; x < maskPR.w; x++)
if (*data++)
{
pixel_regions_process_stop (pr);
return FALSE;
}
}
/* The mask is empty, meaning we can set the bounds as known */
if (channel->segs_in)
g_free (channel->segs_in);
if (channel->segs_out)
g_free (channel->segs_out);
channel->empty = TRUE;
channel->segs_in = NULL;
channel->segs_out = NULL;
channel->num_segs_in = 0;
channel->num_segs_out = 0;
channel->bounds_known = TRUE;
channel->boundary_known = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = GIMP_ITEM (channel)->width;
channel->y2 = GIMP_ITEM (channel)->height;
return TRUE;
}
static void
gimp_channel_real_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean push_undo)
{
PixelRegion srcPR;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->feather_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)),
TRUE);
gaussian_blur_region (&srcPR, radius_x, radius_y);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_sharpen (GimpChannel *channel,
gboolean push_undo)
{
PixelRegion maskPR;
GimpLut *lut;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->sharpen_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)),
TRUE);
lut = threshold_lut_new (0.5, 1);
pixel_regions_process_parallel ((PixelProcessorFunc) gimp_lut_process_inline,
lut, 1, &maskPR);
gimp_lut_free (lut);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo)
{
PixelRegion maskPR;
guchar bg = TRANSPARENT_OPACITY;
if (push_undo)
{
if (! undo_desc)
undo_desc = GIMP_CHANNEL_GET_CLASS (channel)->clear_desc;
gimp_channel_push_undo (channel, undo_desc);
}
else
{
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
}
if (channel->bounds_known && !channel->empty)
{
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
channel->x1, channel->y1,
(channel->x2 - channel->x1),
(channel->y2 - channel->y1), TRUE);
color_region (&maskPR, &bg);
}
else
{
/* clear the mask */
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, TRUE);
color_region (&maskPR, &bg);
}
/* we know the bounds */
channel->bounds_known = TRUE;
channel->empty = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = GIMP_ITEM (channel)->width;
channel->y2 = GIMP_ITEM (channel)->height;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_all (GimpChannel *channel,
gboolean push_undo)
{
PixelRegion maskPR;
guchar bg = OPAQUE_OPACITY;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->all_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
/* clear the channel */
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, TRUE);
color_region (&maskPR, &bg);
/* we know the bounds */
channel->bounds_known = TRUE;
channel->empty = FALSE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = GIMP_ITEM (channel)->width;
channel->y2 = GIMP_ITEM (channel)->height;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_invert (GimpChannel *channel,
gboolean push_undo)
{
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->invert_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
if (channel->bounds_known && channel->empty)
{
gimp_channel_all (channel, FALSE);
}
else
{
PixelRegion maskPR;
GimpLut *lut;
pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles,
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height, TRUE);
lut = invert_lut_new (1);
pixel_regions_process_parallel ((PixelProcessorFunc)
gimp_lut_process_inline,
lut, 1, &maskPR);
gimp_lut_free (lut);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
}
static void
gimp_channel_real_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean feather,
gboolean push_undo)
{
PixelRegion bPR;
gint x1, y1, x2, y2;
if (radius_x < 0 || radius_y < 0)
return;
if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2))
return;
if (gimp_channel_is_empty (channel))
return;
if (x1 - radius_x < 0)
x1 = 0;
else
x1 -= radius_x;
if (x2 + radius_x > GIMP_ITEM (channel)->width)
x2 = GIMP_ITEM (channel)->width;
else
x2 += radius_x;
if (y1 - radius_y < 0)
y1 = 0;
else
y1 -= radius_y;
if (y2 + radius_y > GIMP_ITEM (channel)->height)
y2 = GIMP_ITEM (channel)->height;
else
y2 += radius_y;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->border_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles,
x1, y1, x2 - x1, y2 - y1, TRUE);
border_region (&bPR, radius_x, radius_y, feather);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo)
{
PixelRegion bPR;
gint x1, y1, x2, y2;
if (radius_x == 0 && radius_y == 0)
return;
if (radius_x <= 0 && radius_y <= 0)
{
gimp_channel_shrink (channel, -radius_x, -radius_y, FALSE, push_undo);
return;
}
if (radius_x < 0 || radius_y < 0)
return;
if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2))
return;
if (gimp_channel_is_empty (channel))
return;
if (x1 - radius_x > 0)
x1 = x1 - radius_x;
else
x1 = 0;
if (y1 - radius_y > 0)
y1 = y1 - radius_y;
else
y1 = 0;
if (x2 + radius_x < GIMP_ITEM (channel)->width)
x2 = x2 + radius_x;
else
x2 = GIMP_ITEM (channel)->width;
if (y2 + radius_y < GIMP_ITEM (channel)->height)
y2 = y2 + radius_y;
else
y2 = GIMP_ITEM (channel)->height;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->grow_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
/* need full extents for grow, not! */
pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles,
x1, y1, (x2 - x1), (y2 - y1), TRUE);
fatten_region (&bPR, radius_x, radius_y);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_real_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo)
{
PixelRegion bPR;
gint x1, y1, x2, y2;
if (radius_x == 0 && radius_y == 0)
return;
if (radius_x <= 0 && radius_y <= 0)
{
gimp_channel_grow (channel, -radius_x, -radius_y, push_undo);
return;
}
if (radius_x < 0 || radius_y < 0)
return;
if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2))
return;
if (gimp_channel_is_empty (channel))
return;
if (x1 > 0)
x1--;
if (y1 > 0)
y1--;
if (x2 < GIMP_ITEM (channel)->width)
x2++;
if (y2 < GIMP_ITEM (channel)->height)
y2++;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->shrink_desc);
else
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles,
x1, y1, (x2 - x1), (y2 - y1), TRUE);
thin_region (&bPR, radius_x, radius_y, edge_lock);
channel->bounds_known = FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0,
gimp_item_width (GIMP_ITEM (channel)),
gimp_item_height (GIMP_ITEM (channel)));
}
static void
gimp_channel_validate (TileManager *tm,
Tile *tile)
{
/* Set the contents of the tile to empty */
memset (tile_data_pointer (tile, 0, 0),
TRANSPARENT_OPACITY, tile_size (tile));
}
/* public functions */
GimpChannel *
gimp_channel_new (GimpImage *image,
gint width,
gint height,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
channel = g_object_new (GIMP_TYPE_CHANNEL, NULL);
gimp_drawable_configure (GIMP_DRAWABLE (channel),
image,
0, 0, width, height,
GIMP_GRAY_IMAGE, name);
if (color)
channel->color = *color;
channel->show_masked = TRUE;
/* selection mask variables */
channel->x2 = width;
channel->y2 = height;
return channel;
}
GimpChannel *
gimp_channel_new_from_alpha (GimpImage *image,
GimpDrawable *drawable,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
gint width;
gint height;
PixelRegion srcPR, destPR;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_drawable_has_alpha (drawable), NULL);
width = gimp_item_width (GIMP_ITEM (drawable));
height = gimp_item_height (GIMP_ITEM (drawable));
channel = gimp_channel_new (image, width, height, name, color);
gimp_channel_clear (channel, NULL, FALSE);
pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
0, 0, width, height, FALSE);
pixel_region_init (&destPR, gimp_drawable_get_tiles (GIMP_DRAWABLE (channel)),
0, 0, width, height, TRUE);
extract_alpha_region (&srcPR, NULL, &destPR);
channel->bounds_known = FALSE;
return channel;
}
GimpChannel *
gimp_channel_new_from_component (GimpImage *image,
GimpChannelType type,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
TileManager *projection;
PixelRegion src;
PixelRegion dest;
gint width;
gint height;
gint pixel;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
pixel = gimp_image_get_component_index (image, type);
g_return_val_if_fail (pixel != -1, NULL);
gimp_pickable_flush (GIMP_PICKABLE (image->projection));
projection = gimp_pickable_get_tiles (GIMP_PICKABLE (image->projection));
width = tile_manager_width (projection);
height = tile_manager_height (projection);
channel = gimp_channel_new (image, width, height, name, color);
pixel_region_init (&src, projection,
0, 0, width, height, FALSE);
pixel_region_init (&dest, gimp_drawable_get_tiles (GIMP_DRAWABLE (channel)),
0, 0, width, height, TRUE);
copy_component (&src, &dest, pixel);
return channel;
}
void
gimp_channel_set_color (GimpChannel *channel,
const GimpRGB *color,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
g_return_if_fail (color != NULL);
if (gimp_rgba_distance (&channel->color, color) > 0.0001)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (channel)))
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (channel));
gimp_image_undo_push_channel_color (image, _("Set Channel Color"),
channel);
}
channel->color = *color;
gimp_drawable_update (GIMP_DRAWABLE (channel),
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height);
g_signal_emit (channel, channel_signals[COLOR_CHANGED], 0);
}
}
void
gimp_channel_get_color (const GimpChannel *channel,
GimpRGB *color)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
g_return_if_fail (color != NULL);
*color = channel->color;
}
gdouble
gimp_channel_get_opacity (const GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), GIMP_OPACITY_TRANSPARENT);
return channel->color.a;
}
void
gimp_channel_set_opacity (GimpChannel *channel,
gdouble opacity,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE);
if (channel->color.a != opacity)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (channel)))
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (channel));
gimp_image_undo_push_channel_color (image, _("Set Channel Opacity"),
channel);
}
channel->color.a = opacity;
gimp_drawable_update (GIMP_DRAWABLE (channel),
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height);
g_signal_emit (channel, channel_signals[COLOR_CHANGED], 0);
}
}
gboolean
gimp_channel_get_show_masked (GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
return channel->show_masked;
}
void
gimp_channel_set_show_masked (GimpChannel *channel,
gboolean show_masked)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (show_masked != channel->show_masked)
{
channel->show_masked = show_masked ? TRUE : FALSE;
gimp_drawable_update (GIMP_DRAWABLE (channel),
0, 0,
GIMP_ITEM (channel)->width,
GIMP_ITEM (channel)->height);
}
}
void
gimp_channel_push_undo (GimpChannel *channel,
const gchar *undo_desc)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (channel)));
gimp_image_undo_push_mask (gimp_item_get_image (GIMP_ITEM (channel)),
undo_desc, channel);
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
}
/******************************/
/* selection mask functions */
/******************************/
GimpChannel *
gimp_channel_new_mask (GimpImage *image,
gint width,
gint height)
{
GimpChannel *new_channel;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
new_channel = gimp_channel_new (image, width, height,
_("Selection Mask"), NULL);
tile_manager_set_validate_proc (GIMP_DRAWABLE (new_channel)->tiles,
gimp_channel_validate);
return new_channel;
}
gboolean
gimp_channel_boundary (GimpChannel *channel,
const BoundSeg **segs_in,
const BoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
g_return_val_if_fail (segs_in != NULL, FALSE);
g_return_val_if_fail (segs_out != NULL, FALSE);
g_return_val_if_fail (num_segs_in != NULL, FALSE);
g_return_val_if_fail (num_segs_out != NULL, FALSE);
return GIMP_CHANNEL_GET_CLASS (channel)->boundary (channel,
segs_in, segs_out,
num_segs_in, num_segs_out,
x1, y1,
x2, y2);
}
gboolean
gimp_channel_bounds (GimpChannel *channel,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
gint tmp_x1, tmp_y1, tmp_x2, tmp_y2;
gboolean retval;
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
retval = GIMP_CHANNEL_GET_CLASS (channel)->bounds (channel,
&tmp_x1, &tmp_y1,
&tmp_x2, &tmp_y2);
if (x1) *x1 = tmp_x1;
if (y1) *y1 = tmp_y1;
if (x2) *x2 = tmp_x2;
if (y2) *y2 = tmp_y2;
return retval;
}
gboolean
gimp_channel_is_empty (GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
return GIMP_CHANNEL_GET_CLASS (channel)->is_empty (channel);
}
void
gimp_channel_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->feather (channel, radius_x, radius_y,
push_undo);
}
void
gimp_channel_sharpen (GimpChannel *channel,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->sharpen (channel, push_undo);
}
void
gimp_channel_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->clear (channel, undo_desc, push_undo);
}
void
gimp_channel_all (GimpChannel *channel,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->all (channel, push_undo);
}
void
gimp_channel_invert (GimpChannel *channel,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->invert (channel, push_undo);
}
void
gimp_channel_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean feather,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->border (channel,
radius_x, radius_y, feather,
push_undo);
}
void
gimp_channel_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->grow (channel, radius_x, radius_y,
push_undo);
}
void
gimp_channel_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_CHANNEL (channel));
if (! gimp_item_is_attached (GIMP_ITEM (channel)))
push_undo = FALSE;
GIMP_CHANNEL_GET_CLASS (channel)->shrink (channel, radius_x, radius_y,
edge_lock, push_undo);
}
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