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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /app/core/gimpchannel.c | |
parent | Initial commit. (diff) | |
download | gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip |
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/core/gimpchannel.c | 1956 |
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); +} |