1 files changed, 285 insertions, 0 deletions
diff --git a/app/vectors/gimpvectors-compat.c b/app/vectors/gimpvectors-compat.c
new file mode 100644
index 0000000..5416d00
--- /dev/null
+++ b/app/vectors/gimpvectors-compat.c
@@ -0,0 +1,285 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpvectors-compat.c
+ * Copyright (C) 2003 Michael Natterer <mitch@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 <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "vectors-types.h"
+
+#include "core/gimpimage.h"
+
+#include "gimpanchor.h"
+#include "gimpbezierstroke.h"
+#include "gimpvectors.h"
+#include "gimpvectors-compat.h"
+
+
+enum
+{
+  GIMP_VECTORS_COMPAT_ANCHOR     = 1,
+  GIMP_VECTORS_COMPAT_CONTROL    = 2,
+  GIMP_VECTORS_COMPAT_NEW_STROKE = 3
+};
+
+
+static const GimpCoords default_coords = GIMP_COORDS_DEFAULT_VALUES;
+
+
+GimpVectors *
+gimp_vectors_compat_new (GimpImage              *image,
+                         const gchar            *name,
+                         GimpVectorsCompatPoint *points,
+                         gint                    n_points,
+                         gboolean                closed)
+{
+  GimpVectors *vectors;
+  GimpStroke  *stroke;
+  GimpCoords  *coords;
+  GimpCoords  *curr_stroke;
+  GimpCoords  *curr_coord;
+  gint         i;
+
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+  g_return_val_if_fail (name != NULL, NULL);
+  g_return_val_if_fail (points != NULL || n_points == 0, NULL);
+  g_return_val_if_fail (n_points >= 0, NULL);
+
+  vectors = gimp_vectors_new (image, name);
+
+  coords = g_new0 (GimpCoords, n_points + 1);
+
+  curr_stroke = curr_coord = coords;
+
+  /*  skip the first control point, will set it later  */
+  curr_coord++;
+
+  for (i = 0; i < n_points; i++)
+    {
+      *curr_coord = default_coords;
+
+      curr_coord->x = points[i].x;
+      curr_coord->y = points[i].y;
+
+      /*  copy the first anchor to be the first control point  */
+      if (curr_coord == curr_stroke + 1)
+        *curr_stroke = *curr_coord;
+
+      /*  found new stroke start  */
+      if (points[i].type == GIMP_VECTORS_COMPAT_NEW_STROKE)
+        {
+          /*  copy the last control point to the beginning of the stroke  */
+          *curr_stroke = *(curr_coord - 1);
+
+          stroke =
+            gimp_bezier_stroke_new_from_coords (curr_stroke,
+                                                curr_coord - curr_stroke - 1,
+                                                TRUE);
+          gimp_vectors_stroke_add (vectors, stroke);
+          g_object_unref (stroke);
+
+          /*  start a new stroke  */
+          curr_stroke = curr_coord - 1;
+
+          /*  copy the first anchor to be the first control point  */
+          *curr_stroke = *curr_coord;
+        }
+
+      curr_coord++;
+    }
+
+  if (closed)
+    {
+      /*  copy the last control point to the beginning of the stroke  */
+      curr_coord--;
+      *curr_stroke = *curr_coord;
+    }
+
+  stroke = gimp_bezier_stroke_new_from_coords (curr_stroke,
+                                               curr_coord - curr_stroke,
+                                               closed);
+  gimp_vectors_stroke_add (vectors, stroke);
+  g_object_unref (stroke);
+
+  g_free (coords);
+
+  return vectors;
+}
+
+gboolean
+gimp_vectors_compat_is_compatible (GimpImage *image)
+{
+  GList *list;
+
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  for (list = gimp_image_get_vectors_iter (image);
+       list;
+       list = g_list_next (list))
+    {
+      GimpVectors *vectors    = GIMP_VECTORS (list->data);
+      GList       *strokes;
+      gint         open_count = 0;
+
+      if (gimp_item_get_visible (GIMP_ITEM (vectors)))
+        return FALSE;
+
+      for (strokes = vectors->strokes->head;
+           strokes;
+           strokes = g_list_next (strokes))
+        {
+           GimpStroke *stroke = GIMP_STROKE (strokes->data);
+
+          if (! GIMP_IS_BEZIER_STROKE (stroke))
+            return FALSE;
+
+          if (!stroke->closed)
+            open_count++;
+        }
+
+      if (open_count >= 2)
+        return FALSE;
+    }
+
+  return TRUE;
+}
+
+GimpVectorsCompatPoint *
+gimp_vectors_compat_get_points (GimpVectors *vectors,
+                                gint32      *n_points,
+                                gint32      *closed)
+{
+  GimpVectorsCompatPoint *points;
+  GList                  *strokes;
+  gint                    i;
+  GList                  *postponed = NULL;  /* for the one open stroke... */
+  gint                    open_count;
+  gboolean                first_stroke = TRUE;
+
+  g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
+  g_return_val_if_fail (n_points != NULL, NULL);
+  g_return_val_if_fail (closed != NULL, NULL);
+
+  *n_points = 0;
+  *closed   = TRUE;
+
+  open_count = 0;
+
+  for (strokes = vectors->strokes->head;
+       strokes;
+       strokes = g_list_next (strokes))
+    {
+      GimpStroke *stroke = strokes->data;
+      gint        n_anchors;
+
+      if (! stroke->closed)
+        {
+          open_count++;
+          postponed = strokes;
+          *closed = FALSE;
+
+          if (open_count >= 2)
+            {
+              g_warning ("gimp_vectors_compat_get_points(): convert failed");
+              *n_points = 0;
+              return NULL;
+            }
+        }
+
+      n_anchors = g_queue_get_length (stroke->anchors);
+
+      if (! stroke->closed)
+        n_anchors--;
+
+      *n_points += n_anchors;
+    }
+
+  points = g_new0 (GimpVectorsCompatPoint, *n_points);
+
+  i = 0;
+
+  for (strokes = vectors->strokes->head;
+       strokes || postponed;
+       strokes = g_list_next (strokes))
+    {
+      GimpStroke *stroke;
+      GList      *anchors;
+
+      if (strokes)
+        {
+          if (postponed && strokes == postponed)
+            /* we need to visit the open stroke last... */
+            continue;
+          else
+            stroke = GIMP_STROKE (strokes->data);
+        }
+      else
+        {
+          stroke = GIMP_STROKE (postponed->data);
+          postponed = NULL;
+        }
+
+      for (anchors = stroke->anchors->head;
+           anchors;
+           anchors = g_list_next (anchors))
+        {
+          GimpAnchor *anchor = anchors->data;
+
+          /*  skip the first anchor, will add it at the end if needed  */
+          if (! anchors->prev)
+            continue;
+
+          switch (anchor->type)
+            {
+            case GIMP_ANCHOR_ANCHOR:
+              if (anchors->prev == stroke->anchors->head && ! first_stroke)
+                points[i].type = GIMP_VECTORS_COMPAT_NEW_STROKE;
+              else
+                points[i].type = GIMP_VECTORS_COMPAT_ANCHOR;
+              break;
+
+            case GIMP_ANCHOR_CONTROL:
+              points[i].type = GIMP_VECTORS_COMPAT_CONTROL;
+              break;
+            }
+
+          points[i].x = anchor->position.x;
+          points[i].y = anchor->position.y;
+
+          i++;
+
+          /*  write the skipped control point  */
+          if (! anchors->next && stroke->closed)
+            {
+              anchor = g_queue_peek_head (stroke->anchors);
+
+              points[i].type = GIMP_VECTORS_COMPAT_CONTROL;
+              points[i].x    = anchor->position.x;
+              points[i].y    = anchor->position.y;
+
+              i++;
+            }
+        }
+      first_stroke = FALSE;
+    }
+
+  return points;
+}