Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1255 insertions, 0 deletions

diff --git a/app/vectors/gimpvectors.c b/app/vectors/gimpvectors.c
new file mode 100644
index 0000000..1a65eac
--- /dev/null
+++ b/app/vectors/gimpvectors.c
@@ -0,0 +1,1255 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpvectors.c
+ * Copyright (C) 2002 Simon Budig  <simon@gimp.org>
+ *
+ * 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 <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "vectors-types.h"
+
+#include "core/gimp.h"
+#include "core/gimp-transform-utils.h"
+#include "core/gimpbezierdesc.h"
+#include "core/gimpchannel-select.h"
+#include "core/gimpcontainer.h"
+#include "core/gimpcontext.h"
+#include "core/gimpdrawable-fill.h"
+#include "core/gimpdrawable-stroke.h"
+#include "core/gimperror.h"
+#include "core/gimpimage.h"
+#include "core/gimpimage-undo-push.h"
+#include "core/gimpmarshal.h"
+#include "core/gimppaintinfo.h"
+#include "core/gimpstrokeoptions.h"
+
+#include "paint/gimppaintcore-stroke.h"
+#include "paint/gimppaintoptions.h"
+
+#include "gimpanchor.h"
+#include "gimpstroke.h"
+#include "gimpvectors.h"
+#include "gimpvectors-preview.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  FREEZE,
+  THAW,
+  LAST_SIGNAL
+};
+
+
+static void       gimp_vectors_finalize      (GObject           *object);
+
+static gint64     gimp_vectors_get_memsize   (GimpObject        *object,
+                                              gint64            *gui_size);
+
+static gboolean   gimp_vectors_is_attached   (GimpItem          *item);
+static GimpItemTree * gimp_vectors_get_tree  (GimpItem          *item);
+static gboolean   gimp_vectors_bounds        (GimpItem          *item,
+                                              gdouble           *x,
+                                              gdouble           *y,
+                                              gdouble           *width,
+                                              gdouble           *height);
+static GimpItem * gimp_vectors_duplicate     (GimpItem          *item,
+                                              GType              new_type);
+static void       gimp_vectors_convert       (GimpItem          *item,
+                                              GimpImage         *dest_image,
+                                              GType              old_type);
+static void       gimp_vectors_translate     (GimpItem          *item,
+                                              gdouble            offset_x,
+                                              gdouble            offset_y,
+                                              gboolean           push_undo);
+static void       gimp_vectors_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_vectors_resize        (GimpItem          *item,
+                                              GimpContext       *context,
+                                              GimpFillType       fill_type,
+                                              gint               new_width,
+                                              gint               new_height,
+                                              gint               offset_x,
+                                              gint               offset_y);
+static void       gimp_vectors_flip          (GimpItem          *item,
+                                              GimpContext       *context,
+                                              GimpOrientationType  flip_type,
+                                              gdouble            axis,
+                                              gboolean           clip_result);
+static void       gimp_vectors_rotate        (GimpItem          *item,
+                                              GimpContext       *context,
+                                              GimpRotationType   rotate_type,
+                                              gdouble            center_x,
+                                              gdouble            center_y,
+                                              gboolean           clip_result);
+static void       gimp_vectors_transform     (GimpItem          *item,
+                                              GimpContext       *context,
+                                              const GimpMatrix3 *matrix,
+                                              GimpTransformDirection direction,
+                                              GimpInterpolationType interp_type,
+                                              GimpTransformResize   clip_result,
+                                              GimpProgress      *progress);
+static GimpTransformResize
+                  gimp_vectors_get_clip      (GimpItem          *item,
+                                              GimpTransformResize clip_result);
+static gboolean   gimp_vectors_fill          (GimpItem          *item,
+                                              GimpDrawable      *drawable,
+                                              GimpFillOptions   *fill_options,
+                                              gboolean           push_undo,
+                                              GimpProgress      *progress,
+                                              GError           **error);
+static gboolean   gimp_vectors_stroke        (GimpItem          *item,
+                                              GimpDrawable      *drawable,
+                                              GimpStrokeOptions *stroke_options,
+                                              gboolean           push_undo,
+                                              GimpProgress      *progress,
+                                              GError           **error);
+static void       gimp_vectors_to_selection  (GimpItem          *item,
+                                              GimpChannelOps     op,
+                                              gboolean           antialias,
+                                              gboolean           feather,
+                                              gdouble            feather_radius_x,
+                                              gdouble            feather_radius_y);
+
+static void       gimp_vectors_real_freeze          (GimpVectors       *vectors);
+static void       gimp_vectors_real_thaw            (GimpVectors       *vectors);
+static void       gimp_vectors_real_stroke_add      (GimpVectors       *vectors,
+                                                     GimpStroke        *stroke);
+static void       gimp_vectors_real_stroke_remove   (GimpVectors       *vectors,
+                                                     GimpStroke        *stroke);
+static GimpStroke * gimp_vectors_real_stroke_get    (GimpVectors       *vectors,
+                                                     const GimpCoords  *coord);
+static GimpStroke *gimp_vectors_real_stroke_get_next(GimpVectors       *vectors,
+                                                     GimpStroke        *prev);
+static gdouble gimp_vectors_real_stroke_get_length  (GimpVectors       *vectors,
+                                                     GimpStroke        *prev);
+static GimpAnchor * gimp_vectors_real_anchor_get    (GimpVectors       *vectors,
+                                                     const GimpCoords  *coord,
+                                                     GimpStroke       **ret_stroke);
+static void       gimp_vectors_real_anchor_delete   (GimpVectors       *vectors,
+                                                     GimpAnchor        *anchor);
+static gdouble    gimp_vectors_real_get_length      (GimpVectors       *vectors,
+                                                     const GimpAnchor  *start);
+static gdouble    gimp_vectors_real_get_distance    (GimpVectors       *vectors,
+                                                     const GimpCoords  *coord);
+static gint       gimp_vectors_real_interpolate     (GimpVectors       *vectors,
+                                                     GimpStroke        *stroke,
+                                                     gdouble            precision,
+                                                     gint               max_points,
+                                                     GimpCoords        *ret_coords);
+
+static GimpBezierDesc * gimp_vectors_make_bezier      (GimpVectors     *vectors);
+static GimpBezierDesc * gimp_vectors_real_make_bezier (GimpVectors     *vectors);
+
+
+G_DEFINE_TYPE (GimpVectors, gimp_vectors, GIMP_TYPE_ITEM)
+
+#define parent_class gimp_vectors_parent_class
+
+static guint gimp_vectors_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_vectors_class_init (GimpVectorsClass *klass)
+{
+  GObjectClass      *object_class      = G_OBJECT_CLASS (klass);
+  GimpObjectClass   *gimp_object_class = GIMP_OBJECT_CLASS (klass);
+  GimpViewableClass *viewable_class    = GIMP_VIEWABLE_CLASS (klass);
+  GimpItemClass     *item_class        = GIMP_ITEM_CLASS (klass);
+
+  gimp_vectors_signals[FREEZE] =
+    g_signal_new ("freeze",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GimpVectorsClass, freeze),
+                  NULL, NULL,
+                  gimp_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+
+  gimp_vectors_signals[THAW] =
+    g_signal_new ("thaw",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpVectorsClass, thaw),
+                  NULL, NULL,
+                  gimp_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+
+  object_class->finalize            = gimp_vectors_finalize;
+
+  gimp_object_class->get_memsize    = gimp_vectors_get_memsize;
+
+  viewable_class->get_new_preview   = gimp_vectors_get_new_preview;
+  viewable_class->default_icon_name = "gimp-path";
+
+  item_class->is_attached           = gimp_vectors_is_attached;
+  item_class->get_tree              = gimp_vectors_get_tree;
+  item_class->bounds                = gimp_vectors_bounds;
+  item_class->duplicate             = gimp_vectors_duplicate;
+  item_class->convert               = gimp_vectors_convert;
+  item_class->translate             = gimp_vectors_translate;
+  item_class->scale                 = gimp_vectors_scale;
+  item_class->resize                = gimp_vectors_resize;
+  item_class->flip                  = gimp_vectors_flip;
+  item_class->rotate                = gimp_vectors_rotate;
+  item_class->transform             = gimp_vectors_transform;
+  item_class->get_clip              = gimp_vectors_get_clip;
+  item_class->fill                  = gimp_vectors_fill;
+  item_class->stroke                = gimp_vectors_stroke;
+  item_class->to_selection          = gimp_vectors_to_selection;
+  item_class->default_name          = _("Path");
+  item_class->rename_desc           = C_("undo-type", "Rename Path");
+  item_class->translate_desc        = C_("undo-type", "Move Path");
+  item_class->scale_desc            = C_("undo-type", "Scale Path");
+  item_class->resize_desc           = C_("undo-type", "Resize Path");
+  item_class->flip_desc             = C_("undo-type", "Flip Path");
+  item_class->rotate_desc           = C_("undo-type", "Rotate Path");
+  item_class->transform_desc        = C_("undo-type", "Transform Path");
+  item_class->fill_desc             = C_("undo-type", "Fill Path");
+  item_class->stroke_desc           = C_("undo-type", "Stroke Path");
+  item_class->to_selection_desc     = C_("undo-type", "Path to Selection");
+  item_class->reorder_desc          = C_("undo-type", "Reorder Path");
+  item_class->raise_desc            = C_("undo-type", "Raise Path");
+  item_class->raise_to_top_desc     = C_("undo-type", "Raise Path to Top");
+  item_class->lower_desc            = C_("undo-type", "Lower Path");
+  item_class->lower_to_bottom_desc  = C_("undo-type", "Lower Path to Bottom");
+  item_class->raise_failed          = _("Path cannot be raised higher.");
+  item_class->lower_failed          = _("Path cannot be lowered more.");
+
+  klass->freeze                     = gimp_vectors_real_freeze;
+  klass->thaw                       = gimp_vectors_real_thaw;
+
+  klass->stroke_add                 = gimp_vectors_real_stroke_add;
+  klass->stroke_remove              = gimp_vectors_real_stroke_remove;
+  klass->stroke_get                 = gimp_vectors_real_stroke_get;
+  klass->stroke_get_next            = gimp_vectors_real_stroke_get_next;
+  klass->stroke_get_length          = gimp_vectors_real_stroke_get_length;
+
+  klass->anchor_get                 = gimp_vectors_real_anchor_get;
+  klass->anchor_delete              = gimp_vectors_real_anchor_delete;
+
+  klass->get_length                 = gimp_vectors_real_get_length;
+  klass->get_distance               = gimp_vectors_real_get_distance;
+  klass->interpolate                = gimp_vectors_real_interpolate;
+
+  klass->make_bezier                = gimp_vectors_real_make_bezier;
+}
+
+static void
+gimp_vectors_init (GimpVectors *vectors)
+{
+  gimp_item_set_visible (GIMP_ITEM (vectors), FALSE, FALSE);
+
+  vectors->strokes        = g_queue_new ();
+  vectors->stroke_to_list = g_hash_table_new (g_direct_hash, g_direct_equal);
+  vectors->last_stroke_ID = 0;
+  vectors->freeze_count   = 0;
+  vectors->precision      = 0.2;
+
+  vectors->bezier_desc    = NULL;
+  vectors->bounds_valid   = FALSE;
+}
+
+static void
+gimp_vectors_finalize (GObject *object)
+{
+  GimpVectors *vectors = GIMP_VECTORS (object);
+
+  if (vectors->bezier_desc)
+    {
+      gimp_bezier_desc_free (vectors->bezier_desc);
+      vectors->bezier_desc = NULL;
+    }
+
+  if (vectors->strokes)
+    {
+      g_queue_free_full (vectors->strokes, (GDestroyNotify) g_object_unref);
+      vectors->strokes = NULL;
+    }
+
+  if (vectors->stroke_to_list)
+    {
+      g_hash_table_destroy (vectors->stroke_to_list);
+      vectors->stroke_to_list = NULL;
+    }
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gint64
+gimp_vectors_get_memsize (GimpObject *object,
+                          gint64     *gui_size)
+{
+  GimpVectors *vectors;
+  GList       *list;
+  gint64       memsize = 0;
+
+  vectors = GIMP_VECTORS (object);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    memsize += (gimp_object_get_memsize (GIMP_OBJECT (list->data), gui_size) +
+                sizeof (GList));
+
+  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
+                                                                  gui_size);
+}
+
+static gboolean
+gimp_vectors_is_attached (GimpItem *item)
+{
+  GimpImage *image = gimp_item_get_image (item);
+
+  return (GIMP_IS_IMAGE (image) &&
+          gimp_container_have (gimp_image_get_vectors (image),
+                               GIMP_OBJECT (item)));
+}
+
+static GimpItemTree *
+gimp_vectors_get_tree (GimpItem *item)
+{
+  if (gimp_item_is_attached (item))
+    {
+      GimpImage *image = gimp_item_get_image (item);
+
+      return gimp_image_get_vectors_tree (image);
+    }
+
+  return NULL;
+}
+
+static gboolean
+gimp_vectors_bounds (GimpItem *item,
+                     gdouble  *x,
+                     gdouble  *y,
+                     gdouble  *width,
+                     gdouble  *height)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+
+  if (! vectors->bounds_valid)
+    {
+      GimpStroke *stroke;
+
+      vectors->bounds_empty = TRUE;
+      vectors->bounds_x1 = vectors->bounds_x2 = 0.0;
+      vectors->bounds_y1 = vectors->bounds_y2 = 0.0;
+
+      for (stroke = gimp_vectors_stroke_get_next (vectors, NULL);
+           stroke;
+           stroke = gimp_vectors_stroke_get_next (vectors, stroke))
+        {
+          GArray   *stroke_coords;
+          gboolean  closed;
+
+          stroke_coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
+
+          if (stroke_coords)
+            {
+              GimpCoords point;
+              gint       i;
+
+              if (vectors->bounds_empty && stroke_coords->len > 0)
+                {
+                  point = g_array_index (stroke_coords, GimpCoords, 0);
+
+                  vectors->bounds_x1 = vectors->bounds_x2 = point.x;
+                  vectors->bounds_y1 = vectors->bounds_y2 = point.y;
+
+                  vectors->bounds_empty = FALSE;
+                }
+
+              for (i = 0; i < stroke_coords->len; i++)
+                {
+                  point = g_array_index (stroke_coords, GimpCoords, i);
+
+                  vectors->bounds_x1 = MIN (vectors->bounds_x1, point.x);
+                  vectors->bounds_y1 = MIN (vectors->bounds_y1, point.y);
+                  vectors->bounds_x2 = MAX (vectors->bounds_x2, point.x);
+                  vectors->bounds_y2 = MAX (vectors->bounds_y2, point.y);
+                }
+
+              g_array_free (stroke_coords, TRUE);
+            }
+        }
+
+      vectors->bounds_valid = TRUE;
+    }
+
+  *x      = vectors->bounds_x1;
+  *y      = vectors->bounds_y1;
+  *width  = vectors->bounds_x2 - vectors->bounds_x1;
+  *height = vectors->bounds_y2 - vectors->bounds_y1;
+
+  return ! vectors->bounds_empty;
+}
+
+static GimpItem *
+gimp_vectors_duplicate (GimpItem *item,
+                        GType     new_type)
+{
+  GimpItem *new_item;
+
+  g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_VECTORS), NULL);
+
+  new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
+
+  if (GIMP_IS_VECTORS (new_item))
+    {
+      GimpVectors *vectors     = GIMP_VECTORS (item);
+      GimpVectors *new_vectors = GIMP_VECTORS (new_item);
+
+      gimp_vectors_copy_strokes (vectors, new_vectors);
+    }
+
+  return new_item;
+}
+
+static void
+gimp_vectors_convert (GimpItem  *item,
+                      GimpImage *dest_image,
+                      GType      old_type)
+{
+  gimp_item_set_size (item,
+                      gimp_image_get_width  (dest_image),
+                      gimp_image_get_height (dest_image));
+
+  GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image, old_type);
+}
+
+static void
+gimp_vectors_translate (GimpItem *item,
+                        gdouble   offset_x,
+                        gdouble   offset_y,
+                        gboolean  push_undo)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GList       *list;
+
+  gimp_vectors_freeze (vectors);
+
+  if (push_undo)
+    gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
+                                      _("Move Path"),
+                                      vectors);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_translate (stroke, offset_x, offset_y);
+    }
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_scale (GimpItem              *item,
+                    gint                   new_width,
+                    gint                   new_height,
+                    gint                   new_offset_x,
+                    gint                   new_offset_y,
+                    GimpInterpolationType  interpolation_type,
+                    GimpProgress          *progress)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GimpImage   *image   = gimp_item_get_image (item);
+  GList       *list;
+
+  gimp_vectors_freeze (vectors);
+
+  if (gimp_item_is_attached (item))
+    gimp_image_undo_push_vectors_mod (image, NULL, vectors);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_scale (stroke,
+                         (gdouble) new_width  / (gdouble) gimp_item_get_width  (item),
+                         (gdouble) new_height / (gdouble) gimp_item_get_height (item));
+      gimp_stroke_translate (stroke, new_offset_x, new_offset_y);
+    }
+
+  GIMP_ITEM_CLASS (parent_class)->scale (item,
+                                         gimp_image_get_width  (image),
+                                         gimp_image_get_height (image),
+                                         0, 0,
+                                         interpolation_type, progress);
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_resize (GimpItem     *item,
+                     GimpContext  *context,
+                     GimpFillType  fill_type,
+                     gint          new_width,
+                     gint          new_height,
+                     gint          offset_x,
+                     gint          offset_y)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GimpImage   *image   = gimp_item_get_image (item);
+  GList       *list;
+
+  gimp_vectors_freeze (vectors);
+
+  if (gimp_item_is_attached (item))
+    gimp_image_undo_push_vectors_mod (image, NULL, vectors);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_translate (stroke, offset_x, offset_y);
+    }
+
+  GIMP_ITEM_CLASS (parent_class)->resize (item, context, fill_type,
+                                          gimp_image_get_width  (image),
+                                          gimp_image_get_height (image),
+                                          0, 0);
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_flip (GimpItem            *item,
+                   GimpContext         *context,
+                   GimpOrientationType  flip_type,
+                   gdouble              axis,
+                   gboolean             clip_result)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GList       *list;
+  GimpMatrix3  matrix;
+
+  gimp_matrix3_identity (&matrix);
+  gimp_transform_matrix_flip (&matrix, flip_type, axis);
+
+  gimp_vectors_freeze (vectors);
+
+  gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
+                                    _("Flip Path"),
+                                    vectors);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_transform (stroke, &matrix, NULL);
+    }
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_rotate (GimpItem         *item,
+                     GimpContext      *context,
+                     GimpRotationType  rotate_type,
+                     gdouble           center_x,
+                     gdouble           center_y,
+                     gboolean          clip_result)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GList       *list;
+  GimpMatrix3  matrix;
+
+  gimp_matrix3_identity (&matrix);
+  gimp_transform_matrix_rotate (&matrix, rotate_type, center_x, center_y);
+
+  gimp_vectors_freeze (vectors);
+
+  gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
+                                    _("Rotate Path"),
+                                    vectors);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_transform (stroke, &matrix, NULL);
+    }
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_transform (GimpItem               *item,
+                        GimpContext            *context,
+                        const GimpMatrix3      *matrix,
+                        GimpTransformDirection  direction,
+                        GimpInterpolationType   interpolation_type,
+                        GimpTransformResize     clip_result,
+                        GimpProgress           *progress)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GimpMatrix3  local_matrix;
+  GQueue       strokes;
+  GList       *list;
+
+  gimp_vectors_freeze (vectors);
+
+  gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
+                                    _("Transform Path"),
+                                    vectors);
+
+  local_matrix = *matrix;
+
+  if (direction == GIMP_TRANSFORM_BACKWARD)
+    gimp_matrix3_invert (&local_matrix);
+
+  g_queue_init (&strokes);
+
+  while (! g_queue_is_empty (vectors->strokes))
+    {
+      GimpStroke *stroke = g_queue_peek_head (vectors->strokes);
+
+      g_object_ref (stroke);
+
+      gimp_vectors_stroke_remove (vectors, stroke);
+
+      gimp_stroke_transform (stroke, &local_matrix, &strokes);
+
+      g_object_unref (stroke);
+    }
+
+  vectors->last_stroke_ID = 0;
+
+  for (list = strokes.head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_vectors_stroke_add (vectors, stroke);
+
+      g_object_unref (stroke);
+    }
+
+  g_queue_clear (&strokes);
+
+  gimp_vectors_thaw (vectors);
+}
+
+static GimpTransformResize
+gimp_vectors_get_clip (GimpItem            *item,
+                       GimpTransformResize  clip_result)
+{
+  return GIMP_TRANSFORM_RESIZE_ADJUST;
+}
+
+static gboolean
+gimp_vectors_fill (GimpItem         *item,
+                   GimpDrawable     *drawable,
+                   GimpFillOptions  *fill_options,
+                   gboolean          push_undo,
+                   GimpProgress     *progress,
+                   GError          **error)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+
+  if (g_queue_is_empty (vectors->strokes))
+    {
+      g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
+                           _("Not enough points to fill"));
+      return FALSE;
+    }
+
+  return gimp_drawable_fill_vectors (drawable, fill_options,
+                                     vectors, push_undo, error);
+}
+
+static gboolean
+gimp_vectors_stroke (GimpItem           *item,
+                     GimpDrawable       *drawable,
+                     GimpStrokeOptions  *stroke_options,
+                     gboolean            push_undo,
+                     GimpProgress       *progress,
+                     GError            **error)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  gboolean     retval  = FALSE;
+
+  if (g_queue_is_empty (vectors->strokes))
+    {
+      g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
+                           _("Not enough points to stroke"));
+      return FALSE;
+    }
+
+  switch (gimp_stroke_options_get_method (stroke_options))
+    {
+    case GIMP_STROKE_LINE:
+      retval = gimp_drawable_stroke_vectors (drawable, stroke_options,
+                                             vectors, push_undo, error);
+      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_vectors (core, drawable,
+                                                 paint_options,
+                                                 emulate_dynamics,
+                                                 vectors, push_undo, error);
+
+        g_object_unref (core);
+      }
+      break;
+
+    default:
+      g_return_val_if_reached (FALSE);
+    }
+
+  return retval;
+}
+
+static void
+gimp_vectors_to_selection (GimpItem       *item,
+                           GimpChannelOps  op,
+                           gboolean        antialias,
+                           gboolean        feather,
+                           gdouble         feather_radius_x,
+                           gdouble         feather_radius_y)
+{
+  GimpVectors *vectors = GIMP_VECTORS (item);
+  GimpImage   *image   = gimp_item_get_image (item);
+
+  gimp_channel_select_vectors (gimp_image_get_mask (image),
+                               GIMP_ITEM_GET_CLASS (item)->to_selection_desc,
+                               vectors,
+                               op, antialias,
+                               feather, feather_radius_x, feather_radius_x,
+                               TRUE);
+}
+
+static void
+gimp_vectors_real_freeze (GimpVectors *vectors)
+{
+  /*  release cached bezier representation  */
+  if (vectors->bezier_desc)
+    {
+      gimp_bezier_desc_free (vectors->bezier_desc);
+      vectors->bezier_desc = NULL;
+    }
+
+  /*  invalidate bounds  */
+  vectors->bounds_valid = FALSE;
+}
+
+static void
+gimp_vectors_real_thaw (GimpVectors *vectors)
+{
+  gimp_viewable_invalidate_preview (GIMP_VIEWABLE (vectors));
+}
+
+
+/*  public functions  */
+
+GimpVectors *
+gimp_vectors_new (GimpImage   *image,
+                  const gchar *name)
+{
+  GimpVectors *vectors;
+
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+
+  vectors = GIMP_VECTORS (gimp_item_new (GIMP_TYPE_VECTORS,
+                                         image, name,
+                                         0, 0,
+                                         gimp_image_get_width  (image),
+                                         gimp_image_get_height (image)));
+
+  return vectors;
+}
+
+GimpVectors *
+gimp_vectors_get_parent (GimpVectors *vectors)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  return GIMP_VECTORS (gimp_viewable_get_parent (GIMP_VIEWABLE (vectors)));
+}
+
+void
+gimp_vectors_freeze (GimpVectors *vectors)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (vectors));
+
+  vectors->freeze_count++;
+
+  if (vectors->freeze_count == 1)
+    g_signal_emit (vectors, gimp_vectors_signals[FREEZE], 0);
+}
+
+void
+gimp_vectors_thaw (GimpVectors *vectors)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (vectors));
+  g_return_if_fail (vectors->freeze_count > 0);
+
+  vectors->freeze_count--;
+
+  if (vectors->freeze_count == 0)
+    g_signal_emit (vectors, gimp_vectors_signals[THAW], 0);
+}
+
+void
+gimp_vectors_copy_strokes (GimpVectors *src_vectors,
+                           GimpVectors *dest_vectors)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (src_vectors));
+  g_return_if_fail (GIMP_IS_VECTORS (dest_vectors));
+
+  gimp_vectors_freeze (dest_vectors);
+
+  g_queue_free_full (dest_vectors->strokes, (GDestroyNotify) g_object_unref);
+  dest_vectors->strokes = g_queue_new ();
+  g_hash_table_remove_all (dest_vectors->stroke_to_list);
+
+  dest_vectors->last_stroke_ID = 0;
+
+  gimp_vectors_add_strokes (src_vectors, dest_vectors);
+
+  gimp_vectors_thaw (dest_vectors);
+}
+
+
+void
+gimp_vectors_add_strokes (GimpVectors *src_vectors,
+                          GimpVectors *dest_vectors)
+{
+  GList *stroke;
+
+  g_return_if_fail (GIMP_IS_VECTORS (src_vectors));
+  g_return_if_fail (GIMP_IS_VECTORS (dest_vectors));
+
+  gimp_vectors_freeze (dest_vectors);
+
+  for (stroke = src_vectors->strokes->head;
+       stroke != NULL;
+       stroke = g_list_next (stroke))
+    {
+      GimpStroke *newstroke = gimp_stroke_duplicate (stroke->data);
+
+      g_queue_push_tail (dest_vectors->strokes, newstroke);
+
+      /* Also add to {stroke: GList node} map */
+      g_hash_table_insert (dest_vectors->stroke_to_list,
+                           newstroke,
+                           g_queue_peek_tail_link (dest_vectors->strokes));
+
+      dest_vectors->last_stroke_ID++;
+      gimp_stroke_set_ID (newstroke,
+                          dest_vectors->last_stroke_ID);
+    }
+
+  gimp_vectors_thaw (dest_vectors);
+}
+
+
+void
+gimp_vectors_stroke_add (GimpVectors *vectors,
+                         GimpStroke  *stroke)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (vectors));
+  g_return_if_fail (GIMP_IS_STROKE (stroke));
+
+  gimp_vectors_freeze (vectors);
+
+  GIMP_VECTORS_GET_CLASS (vectors)->stroke_add (vectors, stroke);
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_real_stroke_add (GimpVectors *vectors,
+                              GimpStroke  *stroke)
+{
+  /*
+   * Don't prepend into vector->strokes.  See ChangeLog 2003-05-21
+   * --Mitch
+   */
+  g_queue_push_tail (vectors->strokes, g_object_ref (stroke));
+
+  /* Also add to {stroke: GList node} map */
+  g_hash_table_insert (vectors->stroke_to_list,
+                       stroke,
+                       g_queue_peek_tail_link (vectors->strokes));
+
+  vectors->last_stroke_ID++;
+  gimp_stroke_set_ID (stroke, vectors->last_stroke_ID);
+}
+
+void
+gimp_vectors_stroke_remove (GimpVectors *vectors,
+                            GimpStroke  *stroke)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (vectors));
+  g_return_if_fail (GIMP_IS_STROKE (stroke));
+
+  gimp_vectors_freeze (vectors);
+
+  GIMP_VECTORS_GET_CLASS (vectors)->stroke_remove (vectors, stroke);
+
+  gimp_vectors_thaw (vectors);
+}
+
+static void
+gimp_vectors_real_stroke_remove (GimpVectors *vectors,
+                                 GimpStroke  *stroke)
+{
+  GList *list = g_hash_table_lookup (vectors->stroke_to_list, stroke);
+
+  if (list)
+    {
+      g_queue_delete_link (vectors->strokes, list);
+      g_hash_table_remove (vectors->stroke_to_list, stroke);
+      g_object_unref (stroke);
+    }
+}
+
+gint
+gimp_vectors_get_n_strokes (GimpVectors *vectors)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0);
+
+  return g_queue_get_length (vectors->strokes);
+}
+
+
+GimpStroke *
+gimp_vectors_stroke_get (GimpVectors      *vectors,
+                         const GimpCoords *coord)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get (vectors, coord);
+}
+
+static GimpStroke *
+gimp_vectors_real_stroke_get (GimpVectors      *vectors,
+                              const GimpCoords *coord)
+{
+  GimpStroke *minstroke = NULL;
+  gdouble     mindist   = G_MAXDOUBLE;
+  GList      *list;
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+      GimpAnchor *anchor = gimp_stroke_anchor_get (stroke, coord);
+
+      if (anchor)
+        {
+          gdouble dx = coord->x - anchor->position.x;
+          gdouble dy = coord->y - anchor->position.y;
+
+          if (mindist > dx * dx + dy * dy)
+            {
+              mindist   = dx * dx + dy * dy;
+              minstroke = stroke;
+            }
+        }
+    }
+
+  return minstroke;
+}
+
+GimpStroke *
+gimp_vectors_stroke_get_by_ID (GimpVectors *vectors,
+                               gint         id)
+{
+  GList *list;
+
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      if (gimp_stroke_get_ID (list->data) == id)
+        return list->data;
+    }
+
+  return NULL;
+}
+
+
+GimpStroke *
+gimp_vectors_stroke_get_next (GimpVectors *vectors,
+                              GimpStroke  *prev)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get_next (vectors, prev);
+}
+
+static GimpStroke *
+gimp_vectors_real_stroke_get_next (GimpVectors *vectors,
+                                   GimpStroke  *prev)
+{
+  if (! prev)
+    {
+      return g_queue_peek_head (vectors->strokes);
+    }
+  else
+    {
+      GList *stroke = g_hash_table_lookup (vectors->stroke_to_list, prev);
+
+      g_return_val_if_fail (stroke != NULL, NULL);
+
+      return stroke->next ? stroke->next->data : NULL;
+    }
+}
+
+
+gdouble
+gimp_vectors_stroke_get_length (GimpVectors *vectors,
+                                GimpStroke  *stroke)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
+  g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get_length (vectors, stroke);
+}
+
+static gdouble
+gimp_vectors_real_stroke_get_length (GimpVectors *vectors,
+                                     GimpStroke  *stroke)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
+  g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
+
+  return gimp_stroke_get_length (stroke, vectors->precision);
+}
+
+
+GimpAnchor *
+gimp_vectors_anchor_get (GimpVectors       *vectors,
+                         const GimpCoords  *coord,
+                         GimpStroke       **ret_stroke)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->anchor_get (vectors, coord,
+                                                       ret_stroke);
+}
+
+static GimpAnchor *
+gimp_vectors_real_anchor_get (GimpVectors       *vectors,
+                              const GimpCoords  *coord,
+                              GimpStroke       **ret_stroke)
+{
+  GimpAnchor *minanchor = NULL;
+  gdouble     mindist   = -1;
+  GList      *list;
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+      GimpAnchor *anchor = gimp_stroke_anchor_get (stroke, coord);
+
+      if (anchor)
+        {
+          gdouble dx = coord->x - anchor->position.x;
+          gdouble dy = coord->y - anchor->position.y;
+
+          if (mindist > dx * dx + dy * dy || mindist < 0)
+            {
+              mindist   = dx * dx + dy * dy;
+              minanchor = anchor;
+
+              if (ret_stroke)
+                *ret_stroke = stroke;
+            }
+        }
+    }
+
+  return minanchor;
+}
+
+
+void
+gimp_vectors_anchor_delete (GimpVectors *vectors,
+                            GimpAnchor  *anchor)
+{
+  g_return_if_fail (GIMP_IS_VECTORS (vectors));
+  g_return_if_fail (anchor != NULL);
+
+  GIMP_VECTORS_GET_CLASS (vectors)->anchor_delete (vectors, anchor);
+}
+
+static void
+gimp_vectors_real_anchor_delete (GimpVectors *vectors,
+                                 GimpAnchor  *anchor)
+{
+}
+
+
+void
+gimp_vectors_anchor_select (GimpVectors *vectors,
+                            GimpStroke  *target_stroke,
+                            GimpAnchor  *anchor,
+                            gboolean     selected,
+                            gboolean     exclusive)
+{
+  GList *list;
+
+  for (list = vectors->strokes->head; list; list = g_list_next (list))
+    {
+      GimpStroke *stroke = list->data;
+
+      gimp_stroke_anchor_select (stroke,
+                                 stroke == target_stroke ? anchor : NULL,
+                                 selected, exclusive);
+    }
+}
+
+
+gdouble
+gimp_vectors_get_length (GimpVectors      *vectors,
+                         const GimpAnchor *start)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->get_length (vectors, start);
+}
+
+static gdouble
+gimp_vectors_real_get_length (GimpVectors      *vectors,
+                              const GimpAnchor *start)
+{
+  g_printerr ("gimp_vectors_get_length: default implementation\n");
+
+  return 0;
+}
+
+
+gdouble
+gimp_vectors_get_distance (GimpVectors      *vectors,
+                           const GimpCoords *coord)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->get_distance (vectors, coord);
+}
+
+static gdouble
+gimp_vectors_real_get_distance (GimpVectors      *vectors,
+                                const GimpCoords *coord)
+{
+  g_printerr ("gimp_vectors_get_distance: default implementation\n");
+
+  return 0;
+}
+
+gint
+gimp_vectors_interpolate (GimpVectors *vectors,
+                          GimpStroke  *stroke,
+                          gdouble      precision,
+                          gint         max_points,
+                          GimpCoords  *ret_coords)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0);
+
+  return GIMP_VECTORS_GET_CLASS (vectors)->interpolate (vectors, stroke,
+                                                        precision, max_points,
+                                                        ret_coords);
+}
+
+static gint
+gimp_vectors_real_interpolate (GimpVectors *vectors,
+                               GimpStroke  *stroke,
+                               gdouble      precision,
+                               gint         max_points,
+                               GimpCoords  *ret_coords)
+{
+  g_printerr ("gimp_vectors_interpolate: default implementation\n");
+
+  return 0;
+}
+
+const GimpBezierDesc *
+gimp_vectors_get_bezier (GimpVectors *vectors)
+{
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+
+  if (! vectors->bezier_desc)
+    {
+      vectors->bezier_desc = gimp_vectors_make_bezier (vectors);
+    }
+
+  return  vectors->bezier_desc;
+}
+
+static GimpBezierDesc *
+gimp_vectors_make_bezier (GimpVectors *vectors)
+{
+  return GIMP_VECTORS_GET_CLASS (vectors)->make_bezier (vectors);
+}
+
+static GimpBezierDesc *
+gimp_vectors_real_make_bezier (GimpVectors *vectors)
+{
+  GimpStroke     *stroke;
+  GArray         *cmd_array;
+  GimpBezierDesc *ret_bezdesc = NULL;
+
+  cmd_array = g_array_new (FALSE, FALSE, sizeof (cairo_path_data_t));
+
+  for (stroke = gimp_vectors_stroke_get_next (vectors, NULL);
+       stroke;
+       stroke = gimp_vectors_stroke_get_next (vectors, stroke))
+    {
+      GimpBezierDesc *bezdesc = gimp_stroke_make_bezier (stroke);
+
+      if (bezdesc)
+        {
+          cmd_array = g_array_append_vals (cmd_array, bezdesc->data,
+                                           bezdesc->num_data);
+          gimp_bezier_desc_free (bezdesc);
+        }
+    }
+
+  if (cmd_array->len > 0)
+    ret_bezdesc = gimp_bezier_desc_new ((cairo_path_data_t *) cmd_array->data,
+                                        cmd_array->len);
+
+  g_array_free (cmd_array, FALSE);
+
+  return ret_bezdesc;
+}