/* The GIMP -- an image manipulation program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "config.h" #include #include #include #include #include "libgimpcolor/gimpcolor.h" #include "libgimpmath/gimpmath.h" #include "libgimpbase/gimpbase.h" #include "core-types.h" #include "base/pixel-region.h" #include "base/tile.h" #include "base/tile-manager.h" #include "paint-funcs/paint-funcs.h" #include "gimp.h" #include "gimpchannel.h" #include "gimpcontext.h" #include "gimpdrawable.h" #include "gimpdrawable-preview.h" #include "gimpimage.h" #include "gimpimage-mask.h" #include "gimplayer.h" #include "gimplist.h" #include "gimpparasite.h" #include "gimpparasitelist.h" #include "gimppreviewcache.h" #include "undo.h" #include "libgimp/gimpintl.h" enum { VISIBILITY_CHANGED, REMOVED, LAST_SIGNAL }; /* local function prototypes */ static void gimp_drawable_class_init (GimpDrawableClass *klass); static void gimp_drawable_init (GimpDrawable *drawable); static void gimp_drawable_finalize (GObject *object); static void gimp_drawable_name_changed (GimpObject *drawable); static void gimp_drawable_invalidate_preview (GimpViewable *viewable); /* private variables */ static guint gimp_drawable_signals[LAST_SIGNAL] = { 0 }; static GimpViewableClass *parent_class = NULL; GType gimp_drawable_get_type (void) { static GType drawable_type = 0; if (! drawable_type) { static const GTypeInfo drawable_info = { sizeof (GimpDrawableClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gimp_drawable_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GimpDrawable), 0, /* n_preallocs */ (GInstanceInitFunc) gimp_drawable_init, }; drawable_type = g_type_register_static (GIMP_TYPE_VIEWABLE, "GimpDrawable", &drawable_info, 0); } return drawable_type; } static void gimp_drawable_class_init (GimpDrawableClass *klass) { GObjectClass *object_class; GimpObjectClass *gimp_object_class; GimpViewableClass *viewable_class; object_class = G_OBJECT_CLASS (klass); gimp_object_class = GIMP_OBJECT_CLASS (klass); viewable_class = GIMP_VIEWABLE_CLASS (klass); parent_class = g_type_class_peek_parent (klass); gimp_drawable_signals[VISIBILITY_CHANGED] = g_signal_new ("visibility_changed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GimpDrawableClass, visibility_changed), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); gimp_drawable_signals[REMOVED] = g_signal_new ("removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GimpDrawableClass, removed), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); object_class->finalize = gimp_drawable_finalize; gimp_object_class->name_changed = gimp_drawable_name_changed; viewable_class->invalidate_preview = gimp_drawable_invalidate_preview; viewable_class->get_preview = gimp_drawable_get_preview; klass->visibility_changed = NULL; klass->removed = NULL; } static void gimp_drawable_init (GimpDrawable *drawable) { drawable->tiles = NULL; drawable->visible = FALSE; drawable->width = 0; drawable->height = 0; drawable->offset_x = 0; drawable->offset_y = 0; drawable->bytes = 0; drawable->ID = 0; drawable->tattoo = 0; drawable->gimage = NULL; drawable->type = -1; drawable->has_alpha = FALSE; drawable->preview_cache = NULL; drawable->preview_valid = FALSE; drawable->parasites = gimp_parasite_list_new (); drawable->preview_cache = NULL; drawable->preview_valid = FALSE; } static void gimp_drawable_finalize (GObject *object) { GimpDrawable *drawable; g_return_if_fail (GIMP_IS_DRAWABLE (object)); drawable = GIMP_DRAWABLE (object); if (drawable->gimage && drawable->gimage->gimp) { g_hash_table_remove (drawable->gimage->gimp->drawable_table, GINT_TO_POINTER (drawable->ID)); drawable->gimage = NULL; } if (drawable->tiles) { tile_manager_destroy (drawable->tiles); drawable->tiles = NULL; } if (drawable->preview_cache) gimp_preview_cache_invalidate (&drawable->preview_cache); if (drawable->parasites) { g_object_unref (G_OBJECT (drawable->parasites)); drawable->parasites = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static void gimp_drawable_name_changed (GimpObject *object) { GimpDrawable *drawable; GimpDrawable *drawable2; GList *list, *list2, *base_list; gint unique_ext = 0; gchar *ext; gchar *new_name = NULL; g_return_if_fail (GIMP_IS_DRAWABLE (object)); drawable = GIMP_DRAWABLE (object); /* if no other layers to check name against */ if (drawable->gimage == NULL || gimp_image_is_empty (drawable->gimage)) return; if (GIMP_IS_LAYER (drawable)) base_list = GIMP_LIST (drawable->gimage->layers)->list; else if (GIMP_IS_CHANNEL (drawable)) base_list = GIMP_LIST (drawable->gimage->channels)->list; else base_list = NULL; for (list = base_list; list; list = g_list_next (list)) { drawable2 = GIMP_DRAWABLE (list->data); if (drawable != drawable2 && strcmp (gimp_object_get_name (GIMP_OBJECT (drawable)), gimp_object_get_name (GIMP_OBJECT (drawable2))) == 0) { ext = strrchr (GIMP_OBJECT (drawable)->name, '#'); if (ext) { gchar *ext_str; unique_ext = atoi (ext + 1); ext_str = g_strdup_printf ("%d", unique_ext); /* check if the extension really is of the form "#" */ if (! strcmp (ext_str, ext + 1)) { *ext = '\0'; } else { unique_ext = 0; } g_free (ext_str); } else { unique_ext = 0; } do { unique_ext++; g_free (new_name); new_name = g_strdup_printf ("%s#%d", GIMP_OBJECT (drawable)->name, unique_ext); for (list2 = base_list; list2; list2 = g_list_next (list2)) { drawable2 = GIMP_DRAWABLE (list2->data); if (drawable == drawable2) continue; if (! strcmp (GIMP_OBJECT (drawable2)->name, new_name)) { break; } } } while (list2); g_free (GIMP_OBJECT (drawable)->name); GIMP_OBJECT (drawable)->name = new_name; break; } } } static void gimp_drawable_invalidate_preview (GimpViewable *viewable) { GimpDrawable *drawable; GimpImage *gimage; if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview) GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable); drawable = GIMP_DRAWABLE (viewable); drawable->preview_valid = FALSE; gimage = gimp_drawable_gimage (drawable); if (gimage) gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage)); } void gimp_drawable_configure (GimpDrawable *drawable, GimpImage *gimage, gint width, gint height, GimpImageType type, const gchar *name) { gint bpp; gboolean alpha; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); g_return_if_fail (GIMP_IS_IMAGE (gimage)); drawable->ID = gimage->gimp->next_drawable_ID++; g_hash_table_insert (gimage->gimp->drawable_table, GINT_TO_POINTER (drawable->ID), (gpointer) drawable); if (!name) name = _("unnamed"); switch (type) { case RGB_GIMAGE: bpp = 3; alpha = FALSE; break; case GRAY_GIMAGE: bpp = 1; alpha = FALSE; break; case RGBA_GIMAGE: bpp = 4; alpha = TRUE; break; case GRAYA_GIMAGE: bpp = 2; alpha = TRUE; break; case INDEXED_GIMAGE: bpp = 1; alpha = FALSE; break; case INDEXEDA_GIMAGE: bpp = 2; alpha = TRUE; break; default: g_message (_("Layer type %d not supported."), type); return; } drawable->width = width; drawable->height = height; drawable->bytes = bpp; drawable->type = type; drawable->has_alpha = alpha; drawable->offset_x = 0; drawable->offset_y = 0; if (drawable->tiles) tile_manager_destroy (drawable->tiles); drawable->tiles = tile_manager_new (width, height, bpp); drawable->visible = TRUE; gimp_drawable_set_gimage (drawable, gimage); gimp_object_set_name (GIMP_OBJECT (drawable), name); /* preview variables */ drawable->preview_cache = NULL; drawable->preview_valid = FALSE; } gint gimp_drawable_get_ID (GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); return drawable->ID; } GimpDrawable * gimp_drawable_get_by_ID (Gimp *gimp, gint drawable_id) { g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); if (gimp->drawable_table == NULL) return NULL; return (GimpDrawable *) g_hash_table_lookup (gimp->drawable_table, GINT_TO_POINTER (drawable_id)); } GimpImage * gimp_drawable_gimage (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); return drawable->gimage; } void gimp_drawable_set_gimage (GimpDrawable *drawable, GimpImage *gimage) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); g_return_if_fail (! gimage || GIMP_IS_IMAGE (gimage));; if (gimage == NULL) drawable->tattoo = 0; else if (drawable->tattoo == 0 || drawable->gimage != gimage ) drawable->tattoo = gimp_image_get_new_tattoo (gimage); drawable->gimage = gimage; } void gimp_drawable_update (GimpDrawable *drawable, gint x, gint y, gint w, gint h) { GimpImage *gimage; gint offset_x; gint offset_y; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); gimage = gimp_drawable_gimage (drawable); g_return_if_fail (gimage != NULL); gimp_drawable_offsets (drawable, &offset_x, &offset_y); x += offset_x; y += offset_y; gimp_image_update (gimage, x, y, w, h); gimp_viewable_invalidate_preview (GIMP_VIEWABLE (drawable)); } void gimp_drawable_apply_image (GimpDrawable *drawable, gint x1, gint y1, gint x2, gint y2, TileManager *tiles, gint sparse) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); if (! tiles) undo_push_image (drawable->gimage, drawable, x1, y1, x2, y2); else undo_push_image_mod (drawable->gimage, drawable, x1, y1, x2, y2, tiles, sparse); } void gimp_drawable_merge_shadow (GimpDrawable *drawable, gboolean undo) { GimpImage *gimage; PixelRegion shadowPR; gint x1, y1, x2, y2; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); gimage = gimp_drawable_gimage (drawable); g_return_if_fail (GIMP_IS_IMAGE (gimage)); g_return_if_fail (gimage->shadow != NULL); /* A useful optimization here is to limit the update to the * extents of the selection mask, as it cannot extend beyond * them. */ gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2); pixel_region_init (&shadowPR, gimage->shadow, x1, y1, (x2 - x1), (y2 - y1), FALSE); gimp_image_apply_image (gimage, drawable, &shadowPR, undo, OPAQUE_OPACITY, REPLACE_MODE, NULL, x1, y1); } void gimp_drawable_fill (GimpDrawable *drawable, const GimpRGB *color) { GimpImage *gimage; PixelRegion destPR; guchar c[MAX_CHANNELS]; guchar i; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); gimage = gimp_drawable_gimage (drawable); g_return_if_fail (gimage != NULL); switch (gimp_drawable_type (drawable)) { case RGB_GIMAGE: case RGBA_GIMAGE: gimp_rgba_get_uchar (color, &c[RED_PIX], &c[GREEN_PIX], &c[BLUE_PIX], &c[ALPHA_PIX]); if (gimp_drawable_type (drawable) != RGBA_GIMAGE) c[ALPHA_PIX] = 255; break; case GRAY_GIMAGE: case GRAYA_GIMAGE: gimp_rgba_get_uchar (color, &c[GRAY_PIX], NULL, NULL, &c[ALPHA_G_PIX]); if (gimp_drawable_type (drawable) != GRAYA_GIMAGE) c[ALPHA_G_PIX] = 255; break; case INDEXED_GIMAGE: case INDEXEDA_GIMAGE: gimp_rgb_get_uchar (color, &c[RED_PIX], &c[GREEN_PIX], &c[BLUE_PIX]); gimp_image_transform_color (gimage, drawable, c, &i, RGB); c[INDEXED_PIX] = i; if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE) gimp_rgba_get_uchar (color, NULL, NULL, NULL, &c[ALPHA_I_PIX]); break; default: g_message (_("Can't fill unknown image type.")); break; } pixel_region_init (&destPR, gimp_drawable_data (drawable), 0, 0, gimp_drawable_width (drawable), gimp_drawable_height (drawable), TRUE); color_region (&destPR, c); gimp_drawable_update (drawable, 0, 0, gimp_drawable_width (drawable), gimp_drawable_height (drawable)); } void gimp_drawable_fill_by_type (GimpDrawable *drawable, GimpContext *context, GimpFillType fill_type) { GimpRGB color; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); color.a = 1.0; switch (fill_type) { case FOREGROUND_FILL: gimp_context_get_foreground (context, &color); break; case BACKGROUND_FILL: gimp_context_get_background (context, &color); break; case WHITE_FILL: gimp_rgb_set (&color, 1.0, 1.0, 1.0); break; case TRANSPARENT_FILL: gimp_rgba_set (&color, 0.0, 0.0, 0.0, 0.0); break; case NO_FILL: return; default: g_warning ("gimp_drawable_fill_by_type(): unknown fill type"); return; } gimp_drawable_fill (drawable, &color); } gboolean gimp_drawable_mask_bounds (GimpDrawable *drawable, gint *x1, gint *y1, gint *x2, gint *y2) { GimpImage *gimage; gint off_x, off_y; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); gimage = gimp_drawable_gimage (drawable); g_return_val_if_fail (gimage != NULL, FALSE); if (gimage_mask_bounds (gimage, x1, y1, x2, y2)) { gimp_drawable_offsets (drawable, &off_x, &off_y); *x1 = CLAMP (*x1 - off_x, 0, gimp_drawable_width (drawable)); *y1 = CLAMP (*y1 - off_y, 0, gimp_drawable_height (drawable)); *x2 = CLAMP (*x2 - off_x, 0, gimp_drawable_width (drawable)); *y2 = CLAMP (*y2 - off_y, 0, gimp_drawable_height (drawable)); return TRUE; } else { *x2 = gimp_drawable_width (drawable); *y2 = gimp_drawable_height (drawable); return FALSE; } } /* The removed signal is sent out when the layer is no longer * associcated with an image. It's needed because layers aren't * destroyed immediately, but kept around for undo purposes. Connect * to the removed signal to update bits of UI that are tied to a * particular layer. */ void gimp_drawable_removed (GimpDrawable *drawable) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); g_signal_emit (G_OBJECT (drawable), gimp_drawable_signals[REMOVED], 0); } gboolean gimp_drawable_has_alpha (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); return drawable->has_alpha; } GimpImageType gimp_drawable_type (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); return drawable->type; } GimpImageType gimp_drawable_type_with_alpha (const GimpDrawable *drawable) { GimpImageType type; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); type = gimp_drawable_type (drawable); if (gimp_drawable_has_alpha (drawable)) { return type; } else { switch (type) { case RGB_GIMAGE: return RGBA_GIMAGE; break; case GRAY_GIMAGE: return GRAYA_GIMAGE; break; case INDEXED_GIMAGE: return INDEXEDA_GIMAGE; break; default: g_assert_not_reached (); break; } } return 0; } gboolean gimp_drawable_get_visible (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); return drawable->visible; } void gimp_drawable_set_visible (GimpDrawable *drawable, gboolean visible) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); visible = visible ? TRUE : FALSE; if (drawable->visible != visible) { drawable->visible = visible; g_signal_emit (G_OBJECT (drawable), gimp_drawable_signals[VISIBILITY_CHANGED], 0); gimp_drawable_update (drawable, 0, 0, drawable->width, drawable->height); } } guchar * gimp_drawable_get_color_at (GimpDrawable *drawable, gint x, gint y) { Tile *tile; guchar *src; guchar *dest; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); g_return_val_if_fail (gimp_drawable_gimage (drawable) || ! gimp_drawable_is_indexed (drawable), NULL); /* do not make this a g_return_if_fail() */ if ( !(x >= 0 && x < drawable->width && y >= 0 && y < drawable->height)) return NULL; dest = g_new (guchar, 5); tile = tile_manager_get_tile (gimp_drawable_data (drawable), x, y, TRUE, FALSE); src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT); gimp_image_get_color (gimp_drawable_gimage (drawable), gimp_drawable_type (drawable), dest, src); if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_drawable_type (drawable))) dest[3] = src[gimp_drawable_bytes (drawable) - 1]; else dest[3] = 255; if (gimp_drawable_is_indexed (drawable)) dest[4] = src[0]; else dest[4] = 0; tile_release (tile, FALSE); return dest; } GimpParasite * gimp_drawable_parasite_find (const GimpDrawable *drawable, const gchar *name) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); return gimp_parasite_list_find (drawable->parasites, name); } static void gimp_drawable_parasite_list_foreach_func (gchar *key, GimpParasite *p, gchar ***cur) { *(*cur)++ = (gchar *) g_strdup (key); } gchar ** gimp_drawable_parasite_list (const GimpDrawable *drawable, gint *count) { gchar **list; gchar **cur; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); g_return_val_if_fail (count != NULL, NULL); *count = gimp_parasite_list_length (drawable->parasites); cur = list = g_new (gchar *, *count); gimp_parasite_list_foreach (drawable->parasites, (GHFunc) gimp_drawable_parasite_list_foreach_func, &cur); return list; } void gimp_drawable_parasite_attach (GimpDrawable *drawable, GimpParasite *parasite) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); /* only set the dirty bit manually if we can be saved and the new parasite differs from the current one and we arn't undoable */ if (gimp_parasite_is_undoable (parasite)) { /* do a group in case we have attach_parent set */ undo_push_group_start (drawable->gimage, PARASITE_ATTACH_UNDO); undo_push_drawable_parasite (drawable->gimage, drawable, parasite); } else if (gimp_parasite_is_persistent (parasite) && ! gimp_parasite_compare (parasite, gimp_drawable_parasite_find (drawable, gimp_parasite_name (parasite)))) { undo_push_cantundo (drawable->gimage, _("parasite attach to drawable")); } gimp_parasite_list_add (drawable->parasites, parasite); if (gimp_parasite_has_flag (parasite, GIMP_PARASITE_ATTACH_PARENT)) { gimp_parasite_shift_parent (parasite); gimp_image_parasite_attach (drawable->gimage, parasite); } else if (gimp_parasite_has_flag (parasite, GIMP_PARASITE_ATTACH_GRANDPARENT)) { gimp_parasite_shift_parent (parasite); gimp_parasite_shift_parent (parasite); gimp_parasite_attach (drawable->gimage->gimp, parasite); } if (gimp_parasite_is_undoable (parasite)) { undo_push_group_end (drawable->gimage); } } void gimp_drawable_parasite_detach (GimpDrawable *drawable, const gchar *parasite) { GimpParasite *p; g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); if (! (p = gimp_parasite_list_find (drawable->parasites, parasite))) return; if (gimp_parasite_is_undoable (p)) undo_push_drawable_parasite_remove (drawable->gimage, drawable, gimp_parasite_name (p)); else if (gimp_parasite_is_persistent (p)) undo_push_cantundo (drawable->gimage, _("detach parasite from drawable")); gimp_parasite_list_remove (drawable->parasites, parasite); } GimpTattoo gimp_drawable_get_tattoo (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), 0); return drawable->tattoo; } void gimp_drawable_set_tattoo (GimpDrawable *drawable, GimpTattoo tattoo) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); drawable->tattoo = tattoo; } gboolean gimp_drawable_is_rgb (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); if (gimp_drawable_type (drawable) == RGBA_GIMAGE || gimp_drawable_type (drawable) == RGB_GIMAGE) return TRUE; else return FALSE; } gboolean gimp_drawable_is_gray (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); if (gimp_drawable_type (drawable) == GRAYA_GIMAGE || gimp_drawable_type (drawable) == GRAY_GIMAGE) return TRUE; else return FALSE; } gboolean gimp_drawable_is_indexed (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE || gimp_drawable_type (drawable) == INDEXED_GIMAGE) return TRUE; else return FALSE; } TileManager * gimp_drawable_data (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); return drawable->tiles; } TileManager * gimp_drawable_shadow (GimpDrawable *drawable) { GimpImage *gimage; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); if (! (gimage = gimp_drawable_gimage (drawable))) return NULL; return gimp_image_shadow (gimage, drawable->width, drawable->height, drawable->bytes); } int gimp_drawable_bytes (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); return drawable->bytes; } gint gimp_drawable_width (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); return drawable->width; } gint gimp_drawable_height (const GimpDrawable *drawable) { g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1); return drawable->height; } void gimp_drawable_offsets (const GimpDrawable *drawable, gint *off_x, gint *off_y) { g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); *off_x = drawable->offset_x; *off_y = drawable->offset_y; } guchar * gimp_drawable_cmap (const GimpDrawable *drawable) { GimpImage *gimage; g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); if (! (gimage = gimp_drawable_gimage (drawable))) return NULL; return gimage->cmap; }