1 files changed, 130 insertions, 0 deletions
diff --git a/app/core/gimpbrush-boundary.c b/app/core/gimpbrush-boundary.c
new file mode 100644
index 0000000..9e5cbaa
--- /dev/null
+++ b/app/core/gimpbrush-boundary.c
@@ -0,0 +1,130 @@
+/* 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 <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "core-types.h"
+
+#include "gimpbezierdesc.h"
+#include "gimpboundary.h"
+#include "gimpbrush.h"
+#include "gimpbrush-boundary.h"
+#include "gimptempbuf.h"
+
+
+static GimpBezierDesc *
+gimp_brush_transform_boundary_exact (GimpBrush *brush,
+                                     gdouble    scale,
+                                     gdouble    aspect_ratio,
+                                     gdouble    angle,
+                                     gboolean   reflect,
+                                     gdouble    hardness)
+{
+  const GimpTempBuf *mask;
+
+  mask = gimp_brush_transform_mask (brush,
+                                    scale, aspect_ratio,
+                                    angle, reflect, hardness);
+
+  if (mask)
+    {
+      GeglBuffer    *buffer;
+      GimpBoundSeg  *bound_segs;
+      gint           n_bound_segs;
+
+      buffer = gimp_temp_buf_create_buffer ((GimpTempBuf *) mask);
+
+      bound_segs = gimp_boundary_find (buffer, NULL,
+                                       babl_format ("Y float"),
+                                       GIMP_BOUNDARY_WITHIN_BOUNDS,
+                                       0, 0,
+                                       gegl_buffer_get_width  (buffer),
+                                       gegl_buffer_get_height (buffer),
+                                       0.0,
+                                       &n_bound_segs);
+
+      g_object_unref (buffer);
+
+      if (bound_segs)
+        {
+          GimpBoundSeg *stroke_segs;
+          gint          n_stroke_groups;
+
+          stroke_segs = gimp_boundary_sort (bound_segs, n_bound_segs,
+                                            &n_stroke_groups);
+
+          g_free (bound_segs);
+
+          if (stroke_segs)
+            {
+              GimpBezierDesc *path;
+
+              path = gimp_bezier_desc_new_from_bound_segs (stroke_segs,
+                                                           n_bound_segs,
+                                                           n_stroke_groups);
+
+              g_free (stroke_segs);
+
+              return path;
+            }
+        }
+    }
+
+  return NULL;
+}
+
+static GimpBezierDesc *
+gimp_brush_transform_boundary_approx (GimpBrush *brush,
+                                      gdouble    scale,
+                                      gdouble    aspect_ratio,
+                                      gdouble    angle,
+                                      gboolean   reflect,
+                                      gdouble    hardness)
+{
+  return gimp_brush_transform_boundary_exact (brush,
+                                              scale, aspect_ratio,
+                                              angle, reflect, hardness);
+}
+
+GimpBezierDesc *
+gimp_brush_real_transform_boundary (GimpBrush *brush,
+                                    gdouble    scale,
+                                    gdouble    aspect_ratio,
+                                    gdouble    angle,
+                                    gboolean   reflect,
+                                    gdouble    hardness,
+                                    gint      *width,
+                                    gint      *height)
+{
+  gimp_brush_transform_size (brush, scale, aspect_ratio, angle, reflect,
+                             width, height);
+
+  if (*width < 256 && *height < 256)
+    {
+      return gimp_brush_transform_boundary_exact (brush,
+                                                  scale, aspect_ratio,
+                                                  angle, reflect, hardness);
+    }
+
+  return gimp_brush_transform_boundary_approx (brush,
+                                               scale, aspect_ratio,
+                                               angle, reflect, hardness);
+}