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-rw-r--r--app/core/gimpchannel.c1956
1 files changed, 1956 insertions, 0 deletions
diff --git a/app/core/gimpchannel.c b/app/core/gimpchannel.c
new file mode 100644
index 0000000..784551a
--- /dev/null
+++ b/app/core/gimpchannel.c
@@ -0,0 +1,1956 @@
+/* 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-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 "gimpmarshal.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 *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 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,
+ 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_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->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);
+
+ if (gimp_drawable_get_linear (drawable))
+ color_format = babl_format ("RGBA float");
+ else
+ color_format = babl_format ("R'G'B'A float");
+
+ 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);
+
+ g_warn_if_fail (channel->mask_node == NULL);
+
+ channel->mask_node = gegl_node_new_child (node,
+ "operation", "gegl:opacity",
+ NULL);
+ gegl_node_connect_to (channel->color_node, "output",
+ channel->mask_node, "input");
+
+ 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_connect_to (source, "output",
+ channel->invert_node, "input");
+ gegl_node_connect_to (channel->invert_node, "output",
+ channel->mask_node, "aux");
+ }
+ else
+ {
+ gegl_node_connect_to (source, "output",
+ channel->mask_node, "aux");
+ }
+
+ mode_node = gimp_drawable_get_mode_node (drawable);
+
+ gegl_node_connect_to (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,
+ 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,
+ 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,
+ segs_in, n_segs_in,
+ 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,
+ segs_in, n_segs_in,
+ 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 *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;
+
+ if (gimp_drawable_get_linear (drawable))
+ color_format = babl_format ("RGBA float");
+ else
+ color_format = babl_format ("R'G'B'A float");
+
+ 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 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);
+ }
+
+ 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);
+ }
+
+ 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_connect_to (source, "output",
+ channel->invert_node, "input");
+ gegl_node_connect_to (channel->invert_node, "output",
+ channel->mask_node, "aux");
+ }
+ else
+ {
+ gegl_node_disconnect (channel->invert_node, "input");
+
+ gegl_node_connect_to (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);
+}
+
+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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-19 18:41:08 +0000