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-rw-r--r--app/core/gimpbrush-boundary.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/app/core/gimpbrush-boundary.c b/app/core/gimpbrush-boundary.c
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+++ b/app/core/gimpbrush-boundary.c
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+/* 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);
+}