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gimp/app/core/gimpchannel.c

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/* GIMP - The GNU 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "paint/gimppaintcore-stroke.h"
#include "paint/gimppaintoptions.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-apply-operation.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimp-gegl-mask.h"
#include "gegl/gimp-gegl-nodes.h"
#include "gimp.h"
#include "gimp-utils.h"
#include "gimpboundary.h"
#include "gimpcontainer.h"
#include "gimperror.h"
#include "gimpimage.h"
#include "gimpimage-quick-mask.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimpchannel.h"
#include "gimpchannel-select.h"
#include "gimpcontext.h"
#include "gimpdrawable-fill.h"
#include "gimpdrawable-stroke.h"
#include "gimppaintinfo.h"
#include "gimppickable.h"
#include "gimpstrokeoptions.h"
#include "gimp-intl.h"
#define RGBA_EPSILON 1e-6
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 GeglNode * gimp_channel_get_node (GimpFilter *filter);
static gboolean gimp_channel_is_attached (GimpItem *item);
static GimpItemTree * gimp_channel_get_tree (GimpItem *item);
static gboolean gimp_channel_bounds (GimpItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height);
static GimpItem * gimp_channel_duplicate (GimpItem *item,
GType new_type);
static void gimp_channel_convert (GimpItem *item,
GimpImage *dest_image,
GType old_type);
static void gimp_channel_translate (GimpItem *item,
gdouble off_x,
gdouble 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,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static GimpTransformResize
gimp_channel_get_clip (GimpItem *item,
GimpTransformResize clip_result);
static gboolean gimp_channel_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static gboolean gimp_channel_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static void gimp_channel_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y);
static void gimp_channel_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress);
static void gimp_channel_invalidate_boundary (GimpDrawable *drawable);
static void gimp_channel_get_active_components (GimpDrawable *drawable,
gboolean *active);
static void gimp_channel_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds);
static gdouble gimp_channel_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static gboolean gimp_channel_real_boundary (GimpChannel *channel,
const GimpBoundSeg **segs_in,
const GimpBoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2);
static gboolean gimp_channel_real_is_empty (GimpChannel *channel);
static gboolean gimp_channel_real_is_full (GimpChannel *channel);
static void gimp_channel_real_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean edge_lock,
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,
GimpChannelBorderStyle style,
gboolean edge_lock,
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_real_flood (GimpChannel *channel,
gboolean push_undo);
static void gimp_channel_buffer_changed (GeglBuffer *buffer,
const GeglRectangle *rect,
GimpChannel *channel);
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);
GimpFilterClass *filter_class = GIMP_FILTER_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, NULL,
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_icon_name = "gimp-channel";
filter_class->get_node = gimp_channel_get_node;
item_class->is_attached = gimp_channel_is_attached;
item_class->get_tree = gimp_channel_get_tree;
item_class->bounds = gimp_channel_bounds;
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->get_clip = gimp_channel_get_clip;
item_class->fill = gimp_channel_fill;
item_class->stroke = gimp_channel_stroke;
item_class->to_selection = gimp_channel_to_selection;
item_class->default_name = _("Channel");
item_class->rename_desc = C_("undo-type", "Rename Channel");
item_class->translate_desc = C_("undo-type", "Move Channel");
item_class->scale_desc = C_("undo-type", "Scale Channel");
item_class->resize_desc = C_("undo-type", "Resize Channel");
item_class->flip_desc = C_("undo-type", "Flip Channel");
item_class->rotate_desc = C_("undo-type", "Rotate Channel");
item_class->transform_desc = C_("undo-type", "Transform Channel");
item_class->fill_desc = C_("undo-type", "Fill Channel");
item_class->stroke_desc = C_("undo-type", "Stroke Channel");
item_class->to_selection_desc = C_("undo-type", "Channel to Selection");
item_class->reorder_desc = C_("undo-type", "Reorder Channel");
item_class->raise_desc = C_("undo-type", "Raise Channel");
item_class->raise_to_top_desc = C_("undo-type", "Raise Channel to Top");
item_class->lower_desc = C_("undo-type", "Lower Channel");
item_class->lower_to_bottom_desc = C_("undo-type", "Lower Channel to Bottom");
item_class->raise_failed = _("Channel cannot be raised higher.");
item_class->lower_failed = _("Channel cannot be lowered more.");
drawable_class->convert_type = gimp_channel_convert_type;
drawable_class->invalidate_boundary = gimp_channel_invalidate_boundary;
drawable_class->get_active_components = gimp_channel_get_active_components;
drawable_class->set_buffer = gimp_channel_set_buffer;
klass->boundary = gimp_channel_real_boundary;
klass->is_empty = gimp_channel_real_is_empty;
klass->is_full = gimp_channel_real_is_full;
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->flood = gimp_channel_real_flood;
klass->feather_desc = C_("undo-type", "Feather Channel");
klass->sharpen_desc = C_("undo-type", "Sharpen Channel");
klass->clear_desc = C_("undo-type", "Clear Channel");
klass->all_desc = C_("undo-type", "Fill Channel");
klass->invert_desc = C_("undo-type", "Invert Channel");
klass->border_desc = C_("undo-type", "Border Channel");
klass->grow_desc = C_("undo-type", "Grow Channel");
klass->shrink_desc = C_("undo-type", "Shrink Channel");
klass->flood_desc = C_("undo-type", "Flood 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);
g_clear_pointer (&channel->segs_in, g_free);
g_clear_pointer (&channel->segs_out, g_free);
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 (GimpBoundSeg);
*gui_size += channel->num_segs_out * sizeof (GimpBoundSeg);
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 (viewable)))
{
return g_strdup (_("Quick Mask"));
}
return GIMP_VIEWABLE_CLASS (parent_class)->get_description (viewable,
tooltip);
}
static GeglNode *
gimp_channel_get_node (GimpFilter *filter)
{
GimpDrawable *drawable = GIMP_DRAWABLE (filter);
GimpChannel *channel = GIMP_CHANNEL (filter);
GeglNode *node;
GeglNode *source;
GeglNode *mode_node;
const Babl *color_format;
node = GIMP_FILTER_CLASS (parent_class)->get_node (filter);
source = gimp_drawable_get_source_node (drawable);
gegl_node_add_child (node, source);
g_warn_if_fail (channel->color_node == NULL);
color_format =
gimp_babl_format (GIMP_RGB,
gimp_babl_precision (GIMP_COMPONENT_TYPE_FLOAT,
gimp_drawable_get_trc (drawable)),
TRUE, NULL);
channel->color_node = gegl_node_new_child (node,
"operation", "gegl:color",
"format", color_format,
NULL);
gimp_gegl_node_set_color (channel->color_node,
&channel->color, NULL);
g_warn_if_fail (channel->mask_node == NULL);
channel->mask_node = gegl_node_new_child (node,
"operation", "gegl:opacity",
NULL);
gegl_node_link (channel->color_node, channel->mask_node);
g_warn_if_fail (channel->invert_node == NULL);
channel->invert_node = gegl_node_new_child (node,
"operation", "gegl:invert-linear",
NULL);
if (channel->show_masked)
{
gegl_node_link (source, channel->invert_node);
gegl_node_connect (channel->invert_node, "output",
channel->mask_node, "aux");
}
else
{
gegl_node_connect (source, "output",
channel->mask_node, "aux");
}
mode_node = gimp_drawable_get_mode_node (drawable);
gegl_node_connect (channel->mask_node, "output",
mode_node, "aux");
return node;
}
static gboolean
gimp_channel_is_attached (GimpItem *item)
{
GimpImage *image = gimp_item_get_image (item);
return (GIMP_IS_IMAGE (image) &&
gimp_container_have (gimp_image_get_channels (image),
GIMP_OBJECT (item)));
}
static GimpItemTree *
gimp_channel_get_tree (GimpItem *item)
{
if (gimp_item_is_attached (item))
{
GimpImage *image = gimp_item_get_image (item);
return gimp_image_get_channel_tree (image);
}
return NULL;
}
static gboolean
gimp_channel_bounds (GimpItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
GimpChannel *channel = GIMP_CHANNEL (item);
if (! channel->bounds_known)
{
GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
channel->empty = ! gimp_gegl_mask_bounds (buffer,
&channel->x1,
&channel->y1,
&channel->x2,
&channel->y2);
channel->bounds_known = TRUE;
}
*x = channel->x1;
*y = channel->y1;
*width = channel->x2 - channel->x1;
*height = channel->y2 - channel->y1;
return ! channel->empty;
}
static GimpItem *
gimp_channel_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
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;
if (new_type == GIMP_TYPE_CHANNEL)
{
/* 8-bit channel hack: make sure pixels between all sorts
* of channels of an image is always copied without any
* gamma conversion
*/
GimpDrawable *new_drawable = GIMP_DRAWABLE (new_item);
GimpImage *image = gimp_item_get_image (item);
const Babl *format = gimp_image_get_channel_format (image);
if (format != gimp_drawable_get_format (new_drawable))
{
GeglBuffer *new_buffer;
new_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (new_item),
gimp_item_get_height (new_item)),
format);
gegl_buffer_set_format (new_buffer,
gimp_drawable_get_format (new_drawable));
gimp_gegl_buffer_copy (gimp_drawable_get_buffer (new_drawable),
NULL, GEGL_ABYSS_NONE,
new_buffer, NULL);
gegl_buffer_set_format (new_buffer, NULL);
gimp_drawable_set_buffer (new_drawable, FALSE, NULL, new_buffer);
g_object_unref (new_buffer);
}
}
}
return new_item;
}
static void
gimp_channel_convert (GimpItem *item,
GimpImage *dest_image,
GType old_type)
{
GimpChannel *channel = GIMP_CHANNEL (item);
GimpDrawable *drawable = GIMP_DRAWABLE (item);
if (! gimp_drawable_is_gray (drawable))
{
gimp_drawable_convert_type (drawable, dest_image,
GIMP_GRAY,
gimp_image_get_precision (dest_image),
gimp_drawable_has_alpha (drawable),
NULL, NULL,
GEGL_DITHER_NONE, GEGL_DITHER_NONE,
FALSE, NULL);
}
if (gimp_drawable_has_alpha (drawable))
{
GeglBuffer *new_buffer;
const Babl *format;
GimpRGB background;
format = gimp_drawable_get_format_without_alpha (drawable);
new_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
format);
gimp_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
gimp_gegl_apply_flatten (gimp_drawable_get_buffer (drawable),
NULL, NULL,
new_buffer, &background, NULL,
GIMP_LAYER_COLOR_SPACE_RGB_LINEAR);
gimp_drawable_set_buffer_full (drawable, FALSE, NULL,
new_buffer,
GEGL_RECTANGLE (
gimp_item_get_offset_x (item),
gimp_item_get_offset_y (item),
0, 0),
TRUE);
g_object_unref (new_buffer);
}
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);
gimp_item_set_offset (item, 0, 0);
if (gimp_item_get_width (item) != width ||
gimp_item_get_height (item) != height)
{
gimp_item_resize (item, gimp_get_user_context (dest_image->gimp),
GIMP_FILL_TRANSPARENT,
width, height, 0, 0);
}
}
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image, old_type);
}
static void
gimp_channel_translate (GimpItem *item,
gdouble off_x,
gdouble off_y,
gboolean push_undo)
{
GimpChannel *channel = GIMP_CHANNEL (item);
gint x, y, width, height;
gimp_item_bounds (GIMP_ITEM (channel), &x, &y, &width, &height);
/* update the old area */
gimp_drawable_update (GIMP_DRAWABLE (item), x, y, width, height);
if (push_undo)
gimp_channel_push_undo (channel, NULL);
if (gimp_rectangle_intersect (x + SIGNED_ROUND (off_x),
y + SIGNED_ROUND (off_y),
width, height,
0, 0,
gimp_item_get_width (GIMP_ITEM (channel)),
gimp_item_get_height (GIMP_ITEM (channel)),
&x, &y, &width, &height))
{
/* copy the portion of the mask we will keep to a temporary
* buffer
*/
GeglBuffer *tmp_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
gimp_drawable_get_format (GIMP_DRAWABLE (channel)));
gimp_gegl_buffer_copy (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x - SIGNED_ROUND (off_x),
y - SIGNED_ROUND (off_y),
width, height),
GEGL_ABYSS_NONE,
tmp_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
/* clear the mask */
gegl_buffer_clear (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL);
/* copy the temp mask back to the mask */
gimp_gegl_buffer_copy (tmp_buffer, NULL, GEGL_ABYSS_NONE,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x, y, 0, 0));
/* free the temporary mask */
g_object_unref (tmp_buffer);
channel->x1 = x;
channel->y1 = y;
channel->x2 = x + width;
channel->y2 = y + height;
}
else
{
/* clear the mask */
gegl_buffer_clear (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL);
channel->empty = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = gimp_item_get_width (GIMP_ITEM (channel));
channel->y2 = gimp_item_get_height (GIMP_ITEM (channel));
}
/* 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)
{
GimpChannel *channel = GIMP_CHANNEL (item);
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
{
new_offset_x = 0;
new_offset_y = 0;
}
/* don't waste CPU cycles scaling an empty channel */
if (channel->bounds_known && channel->empty)
{
GimpDrawable *drawable = GIMP_DRAWABLE (item);
GeglBuffer *new_buffer;
new_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0, new_width, new_height),
gimp_drawable_get_format (drawable));
gimp_drawable_set_buffer_full (drawable,
gimp_item_is_attached (item), NULL,
new_buffer,
GEGL_RECTANGLE (new_offset_x, new_offset_y,
0, 0),
TRUE);
g_object_unref (new_buffer);
gimp_channel_clear (GIMP_CHANNEL (item), NULL, FALSE);
}
else
{
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,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GIMP_ITEM_CLASS (parent_class)->resize (item, context, GIMP_FILL_TRANSPARENT,
new_width, new_height,
offset_x, offset_y);
if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL)
{
gimp_item_set_offset (item, 0, 0);
}
}
static GimpTransformResize
gimp_channel_get_clip (GimpItem *item,
GimpTransformResize clip_result)
{
return GIMP_TRANSFORM_RESIZE_CLIP;
}
static gboolean
gimp_channel_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpChannel *channel = GIMP_CHANNEL (item);
const GimpBoundSeg *segs_in;
const GimpBoundSeg *segs_out;
gint n_segs_in;
gint n_segs_out;
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_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot fill empty channel."));
return FALSE;
}
gimp_item_get_offset (item, &offset_x, &offset_y);
gimp_drawable_fill_boundary (drawable,
fill_options,
segs_in, n_segs_in,
offset_x, offset_y,
push_undo);
return TRUE;
}
static gboolean
gimp_channel_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpChannel *channel = GIMP_CHANNEL (item);
const GimpBoundSeg *segs_in;
const GimpBoundSeg *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_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot stroke empty channel."));
return FALSE;
}
gimp_item_get_offset (item, &offset_x, &offset_y);
switch (gimp_stroke_options_get_method (stroke_options))
{
case GIMP_STROKE_LINE:
gimp_drawable_stroke_boundary (drawable,
stroke_options,
n_segs_in > 0 ? segs_in : segs_out,
n_segs_in > 0 ? n_segs_in : n_segs_out,
offset_x, offset_y,
push_undo);
retval = TRUE;
break;
case GIMP_STROKE_PAINT_METHOD:
{
GimpPaintInfo *paint_info;
GimpPaintCore *core;
GimpPaintOptions *paint_options;
gboolean emulate_dynamics;
paint_info = gimp_context_get_paint_info (GIMP_CONTEXT (stroke_options));
core = g_object_new (paint_info->paint_type, NULL);
paint_options = gimp_stroke_options_get_paint_options (stroke_options);
emulate_dynamics = gimp_stroke_options_get_emulate_dynamics (stroke_options);
retval = gimp_paint_core_stroke_boundary (core, drawable,
paint_options,
emulate_dynamics,
n_segs_in > 0 ? segs_in : segs_out,
n_segs_in > 0 ? n_segs_in : n_segs_out,
offset_x, offset_y,
push_undo, error);
g_object_unref (core);
}
break;
default:
g_return_val_if_reached (FALSE);
}
return retval;
}
static void
gimp_channel_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpChannel *channel = GIMP_CHANNEL (item);
GimpImage *image = gimp_item_get_image (item);
gint off_x, off_y;
gimp_item_get_offset (item, &off_x, &off_y);
gimp_channel_select_channel (gimp_image_get_mask (image),
GIMP_ITEM_GET_CLASS (item)->to_selection_desc,
channel, off_x, off_y,
op,
feather, feather_radius_x, feather_radius_x);
}
static void
gimp_channel_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress)
{
GeglBuffer *dest_buffer;
dest_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (GIMP_ITEM (drawable)),
gimp_item_get_height (GIMP_ITEM (drawable))),
new_format);
if (mask_dither_type == GEGL_DITHER_NONE)
{
gimp_gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
GEGL_ABYSS_NONE,
dest_buffer, NULL);
}
else
{
gint bits;
bits = (babl_format_get_bytes_per_pixel (new_format) * 8 /
babl_format_get_n_components (new_format));
gimp_gegl_apply_dither (gimp_drawable_get_buffer (drawable),
NULL, NULL,
dest_buffer, 1 << bits, mask_dither_type);
}
gimp_drawable_set_buffer (drawable, push_undo, NULL, dest_buffer);
g_object_unref (dest_buffer);
}
static void
gimp_channel_invalidate_boundary (GimpDrawable *drawable)
{
GimpChannel *channel = GIMP_CHANNEL (drawable);
channel->boundary_known = FALSE;
channel->bounds_known = FALSE;
}
static void
gimp_channel_get_active_components (GimpDrawable *drawable,
gboolean *active)
{
/* Make sure that the alpha channel is not valid. */
active[GRAY] = TRUE;
active[ALPHA_G] = FALSE;
}
static void
gimp_channel_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds)
{
GimpChannel *channel = GIMP_CHANNEL (drawable);
GeglBuffer *old_buffer = gimp_drawable_get_buffer (drawable);
if (old_buffer)
{
g_signal_handlers_disconnect_by_func (old_buffer,
gimp_channel_buffer_changed,
channel);
}
GIMP_DRAWABLE_CLASS (parent_class)->set_buffer (drawable,
push_undo, undo_desc,
buffer, bounds);
gegl_buffer_signal_connect (buffer, "changed",
G_CALLBACK (gimp_channel_buffer_changed),
channel);
if (gimp_filter_peek_node (GIMP_FILTER (channel)))
{
const Babl *color_format =
gimp_babl_format (GIMP_RGB,
gimp_babl_precision (GIMP_COMPONENT_TYPE_FLOAT,
gimp_drawable_get_trc (drawable)),
TRUE, NULL);
gegl_node_set (channel->color_node,
"format", color_format,
NULL);
}
}
static gdouble
gimp_channel_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
GimpChannel *channel = GIMP_CHANNEL (pickable);
gdouble value = GIMP_OPACITY_TRANSPARENT;
if (x >= 0 && x < gimp_item_get_width (GIMP_ITEM (channel)) &&
y >= 0 && y < gimp_item_get_height (GIMP_ITEM (channel)))
{
if (! channel->bounds_known ||
(! channel->empty &&
x >= channel->x1 &&
x < channel->x2 &&
y >= channel->y1 &&
y < channel->y2))
{
gegl_buffer_sample (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
x, y, NULL, &value, babl_format ("Y double"),
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
}
}
return value;
}
static gboolean
gimp_channel_real_boundary (GimpChannel *channel,
const GimpBoundSeg **segs_in,
const GimpBoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2)
{
if (! channel->boundary_known)
{
gint x3, y3, x4, y4;
/* free the out of date boundary segments */
g_free (channel->segs_in);
g_free (channel->segs_out);
if (gimp_item_bounds (GIMP_ITEM (channel), &x3, &y3, &x4, &y4))
{
GeglBuffer *buffer;
GeglRectangle rect = { x3, y3, x4, y4 };
x4 += x3;
y4 += y3;
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
channel->segs_out = gimp_boundary_find (buffer, &rect,
babl_format ("Y float"),
GIMP_BOUNDARY_IGNORE_BOUNDS,
x1, y1, x2, y2,
GIMP_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)
{
channel->segs_in = gimp_boundary_find (buffer, NULL,
babl_format ("Y float"),
GIMP_BOUNDARY_WITHIN_BOUNDS,
x1, y1, x2, y2,
GIMP_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 (! channel->empty);
}
static gboolean
gimp_channel_real_is_empty (GimpChannel *channel)
{
GeglBuffer *buffer;
if (channel->bounds_known)
return channel->empty;
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
if (! gimp_gegl_mask_is_empty (buffer))
return FALSE;
/* The mask is empty, meaning we can set the bounds as known */
g_clear_pointer (&channel->segs_in, g_free);
g_clear_pointer (&channel->segs_out, g_free);
channel->empty = TRUE;
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_get_width (GIMP_ITEM (channel));
channel->y2 = gimp_item_get_height (GIMP_ITEM (channel));
return TRUE;
}
static gboolean
gimp_channel_real_is_full (GimpChannel *channel)
{
return ! gimp_channel_is_empty (channel) &&
channel->x1 == 0 &&
channel->y1 == 0 &&
channel->x2 == gimp_item_get_width (GIMP_ITEM (channel)) &&
channel->y2 == gimp_item_get_height (GIMP_ITEM (channel));
}
static void
gimp_channel_real_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean edge_lock,
gboolean push_undo)
{
gint x1, y1, x2, y2;
if (radius_x <= 0.0 && radius_y <= 0.0)
return;
if (! gimp_item_bounds (GIMP_ITEM (channel), &x1, &y1, &x2, &y2))
return;
x2 += x1;
y2 += y1;
if (gimp_channel_is_empty (channel))
return;
x1 = MAX (0, x1 - ceil (radius_x));
y1 = MAX (0, y1 - ceil (radius_y));
x2 = MIN (gimp_item_get_width (GIMP_ITEM (channel)), x2 + ceil (radius_x));
y2 = MIN (gimp_item_get_height (GIMP_ITEM (channel)), y2 + ceil (radius_y));
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->feather_desc);
gimp_gegl_apply_feather (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, NULL,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
radius_x,
radius_y,
edge_lock);
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_sharpen (GimpChannel *channel,
gboolean push_undo)
{
GimpDrawable *drawable = GIMP_DRAWABLE (channel);
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->sharpen_desc);
gimp_gegl_apply_threshold (gimp_drawable_get_buffer (drawable),
NULL, NULL,
gimp_drawable_get_buffer (drawable),
0.5);
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo)
{
GeglBuffer *buffer;
GeglRectangle rect;
GeglRectangle aligned_rect;
if (channel->bounds_known && channel->empty)
return;
if (push_undo)
{
if (! undo_desc)
undo_desc = GIMP_CHANNEL_GET_CLASS (channel)->clear_desc;
gimp_channel_push_undo (channel, undo_desc);
}
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
if (channel->bounds_known)
{
rect.x = channel->x1;
rect.y = channel->y1;
rect.width = channel->x2 - channel->x1;
rect.height = channel->y2 - channel->y1;
}
else
{
rect.x = 0;
rect.y = 0;
rect.width = gimp_item_get_width (GIMP_ITEM (channel));
rect.height = gimp_item_get_height (GIMP_ITEM (channel));
}
gegl_rectangle_align_to_buffer (&aligned_rect, &rect, buffer,
GEGL_RECTANGLE_ALIGNMENT_SUPERSET);
gegl_buffer_clear (buffer, &aligned_rect);
/* we know the bounds */
channel->bounds_known = TRUE;
channel->empty = TRUE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = gimp_item_get_width (GIMP_ITEM (channel));
channel->y2 = gimp_item_get_height (GIMP_ITEM (channel));
gimp_drawable_update (GIMP_DRAWABLE (channel),
rect.x, rect.y, rect.width, rect.height);
}
static void
gimp_channel_real_all (GimpChannel *channel,
gboolean push_undo)
{
GeglColor *color;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->all_desc);
/* clear the channel */
color = gegl_color_new ("#fff");
gegl_buffer_set_color (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, color);
g_object_unref (color);
/* we know the bounds */
channel->bounds_known = TRUE;
channel->empty = FALSE;
channel->x1 = 0;
channel->y1 = 0;
channel->x2 = gimp_item_get_width (GIMP_ITEM (channel));
channel->y2 = gimp_item_get_height (GIMP_ITEM (channel));
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_invert (GimpChannel *channel,
gboolean push_undo)
{
GimpDrawable *drawable = GIMP_DRAWABLE (channel);
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->invert_desc);
if (channel->bounds_known && channel->empty)
{
gimp_channel_all (channel, FALSE);
}
else
{
gimp_gegl_apply_invert_linear (gimp_drawable_get_buffer (drawable),
NULL, NULL,
gimp_drawable_get_buffer (drawable));
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
}
static void
gimp_channel_real_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
GimpChannelBorderStyle style,
gboolean edge_lock,
gboolean push_undo)
{
gint x1, y1, x2, y2;
if (radius_x == 0 && radius_y == 0)
{
/* The relevant GEGL operations require radius_x and radius_y to be > 0.
* When both are 0 (currently can only be achieved by the user through
* PDB), the effect should be to clear the channel.
*/
gimp_channel_clear (channel,
GIMP_CHANNEL_GET_CLASS (channel)->border_desc,
push_undo);
return;
}
else if (radius_x <= 0 || radius_y <= 0)
{
/* FIXME: Implement the case where only one of radius_x and radius_y is 0.
* Currently, should never happen.
*/
g_return_if_reached();
}
if (! gimp_item_bounds (GIMP_ITEM (channel), &x1, &y1, &x2, &y2))
return;
x2 += x1;
y2 += y1;
if (gimp_channel_is_empty (channel))
return;
if (x1 - radius_x < 0)
x1 = 0;
else
x1 -= radius_x;
if (x2 + radius_x > gimp_item_get_width (GIMP_ITEM (channel)))
x2 = gimp_item_get_width (GIMP_ITEM (channel));
else
x2 += radius_x;
if (y1 - radius_y < 0)
y1 = 0;
else
y1 -= radius_y;
if (y2 + radius_y > gimp_item_get_height (GIMP_ITEM (channel)))
y2 = gimp_item_get_height (GIMP_ITEM (channel));
else
y2 += radius_y;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->border_desc);
gimp_gegl_apply_border (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, NULL,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
radius_x, radius_y, style, edge_lock);
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo)
{
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_item_bounds (GIMP_ITEM (channel), &x1, &y1, &x2, &y2))
return;
x2 += x1;
y2 += y1;
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_get_width (GIMP_ITEM (channel)))
x2 = x2 + radius_x;
else
x2 = gimp_item_get_width (GIMP_ITEM (channel));
if (y2 + radius_y < gimp_item_get_height (GIMP_ITEM (channel)))
y2 = y2 + radius_y;
else
y2 = gimp_item_get_height (GIMP_ITEM (channel));
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->grow_desc);
gimp_gegl_apply_grow (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, NULL,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
radius_x, radius_y);
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo)
{
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_item_bounds (GIMP_ITEM (channel), &x1, &y1, &x2, &y2))
return;
x2 += x1;
y2 += y1;
if (gimp_channel_is_empty (channel))
return;
if (x1 > 0)
x1--;
if (y1 > 0)
y1--;
if (x2 < gimp_item_get_width (GIMP_ITEM (channel)))
x2++;
if (y2 < gimp_item_get_height (GIMP_ITEM (channel)))
y2++;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->shrink_desc);
gimp_gegl_apply_shrink (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, NULL,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
radius_x, radius_y, edge_lock);
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
static void
gimp_channel_real_flood (GimpChannel *channel,
gboolean push_undo)
{
gint x, y, width, height;
if (! gimp_item_bounds (GIMP_ITEM (channel), &x, &y, &width, &height))
return;
if (gimp_channel_is_empty (channel))
return;
if (push_undo)
gimp_channel_push_undo (channel,
GIMP_CHANNEL_GET_CLASS (channel)->flood_desc);
gimp_gegl_apply_flood (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL, NULL,
gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
GEGL_RECTANGLE (x, y, width, height));
gimp_drawable_update (GIMP_DRAWABLE (channel), x, y, width, height);
}
static void
gimp_channel_buffer_changed (GeglBuffer *buffer,
const GeglRectangle *rect,
GimpChannel *channel)
{
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel));
}
/* 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 =
GIMP_CHANNEL (gimp_drawable_new (GIMP_TYPE_CHANNEL,
image, name,
0, 0, width, height,
gimp_image_get_channel_format (image)));
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_buffer (GimpImage *image,
GeglBuffer *buffer,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
GeglBuffer *dest;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
channel = gimp_channel_new (image,
gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer),
name, color);
dest = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
gimp_gegl_buffer_copy (buffer, NULL, GEGL_ABYSS_NONE, dest, NULL);
return channel;
}
GimpChannel *
gimp_channel_new_from_alpha (GimpImage *image,
GimpDrawable *drawable,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
GeglBuffer *dest_buffer;
gint width;
gint height;
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_get_width (GIMP_ITEM (drawable));
height = gimp_item_get_height (GIMP_ITEM (drawable));
channel = gimp_channel_new (image, width, height, name, color);
gimp_channel_clear (channel, NULL, FALSE);
dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
gegl_buffer_set_format (dest_buffer,
gimp_drawable_get_component_format (drawable,
GIMP_CHANNEL_ALPHA));
gimp_gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
GEGL_ABYSS_NONE,
dest_buffer, NULL);
gegl_buffer_set_format (dest_buffer, NULL);
return channel;
}
GimpChannel *
gimp_channel_new_from_component (GimpImage *image,
GimpChannelType type,
const gchar *name,
const GimpRGB *color)
{
GimpChannel *channel;
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
gint width;
gint height;
const Babl *format;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
format = gimp_image_get_component_format (image, type);
g_return_val_if_fail (format != NULL, NULL);
gimp_pickable_flush (GIMP_PICKABLE (image));
src_buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (image));
width = gegl_buffer_get_width (src_buffer);
height = gegl_buffer_get_height (src_buffer);
channel = gimp_channel_new (image, width, height, name, color);
dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
gegl_buffer_set_format (dest_buffer, format);
gimp_gegl_buffer_copy (src_buffer, NULL, GEGL_ABYSS_NONE, dest_buffer, NULL);
gegl_buffer_set_format (dest_buffer, NULL);
return channel;
}
GimpChannel *
gimp_channel_get_parent (GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), NULL);
return GIMP_CHANNEL (gimp_viewable_get_parent (GIMP_VIEWABLE (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) > RGBA_EPSILON)
{
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, C_("undo-type", "Set Channel Color"),
channel);
}
channel->color = *color;
if (gimp_filter_peek_node (GIMP_FILTER (channel)))
{
gimp_gegl_node_set_color (channel->color_node,
&channel->color, NULL);
}
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
g_signal_emit (channel, channel_signals[COLOR_CHANGED], 0);
}
}
void
gimp_channel_get_color (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 (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, C_("undo-type", "Set Channel Opacity"),
channel);
}
channel->color.a = opacity;
if (gimp_filter_peek_node (GIMP_FILTER (channel)))
{
gimp_gegl_node_set_color (channel->color_node,
&channel->color, NULL);
}
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
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;
if (channel->invert_node)
{
GeglNode *source;
source = gimp_drawable_get_source_node (GIMP_DRAWABLE (channel));
if (channel->show_masked)
{
gegl_node_link (source, channel->invert_node);
gegl_node_connect (channel->invert_node, "output",
channel->mask_node, "aux");
}
else
{
gegl_node_disconnect (channel->invert_node, "input");
gegl_node_connect (source, "output",
channel->mask_node, "aux");
}
}
gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, -1, -1);
}
}
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);
}
/******************************/
/* selection mask functions */
/******************************/
GimpChannel *
gimp_channel_new_mask (GimpImage *image,
gint width,
gint height)
{
GimpChannel *channel;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
channel =
GIMP_CHANNEL (gimp_drawable_new (GIMP_TYPE_CHANNEL,
image, _("Selection Mask"),
0, 0, width, height,
gimp_image_get_mask_format (image)));
channel->show_masked = TRUE;
channel->x2 = width;
channel->y2 = height;
gegl_buffer_clear (gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)),
NULL);
return channel;
}
gboolean
gimp_channel_boundary (GimpChannel *channel,
const GimpBoundSeg **segs_in,
const GimpBoundSeg **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_is_empty (GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), TRUE);
return GIMP_CHANNEL_GET_CLASS (channel)->is_empty (channel);
}
gboolean
gimp_channel_is_full (GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
return GIMP_CHANNEL_GET_CLASS (channel)->is_full (channel);
}
void
gimp_channel_feather (GimpChannel *channel,
gdouble radius_x,
gdouble 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)->feather (channel, radius_x, radius_y,
edge_lock, 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,
GimpChannelBorderStyle style,
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)->border (channel,
radius_x, radius_y, style, edge_lock,
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);
}
void
gimp_channel_flood (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)->flood (channel, push_undo);
}
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