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-rw-r--r--app/vectors/gimpstroke.h343
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diff --git a/app/vectors/gimpstroke.h b/app/vectors/gimpstroke.h
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpstroke.h
+ * 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/>.
+ */
+
+#ifndef __GIMP_STROKE_H__
+#define __GIMP_STROKE_H__
+
+#include "core/gimpobject.h"
+
+
+#define GIMP_TYPE_STROKE (gimp_stroke_get_type ())
+#define GIMP_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_STROKE, GimpStroke))
+#define GIMP_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_STROKE, GimpStrokeClass))
+#define GIMP_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_STROKE))
+#define GIMP_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_STROKE))
+#define GIMP_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_STROKE, GimpStrokeClass))
+
+
+typedef struct _GimpStrokeClass GimpStrokeClass;
+
+struct _GimpStroke
+{
+ GimpObject parent_instance;
+ gint ID;
+
+ GQueue *anchors;
+
+ gboolean closed;
+};
+
+struct _GimpStrokeClass
+{
+ GimpObjectClass parent_class;
+
+ void (* changed) (GimpStroke *stroke);
+ void (* removed) (GimpStroke *stroke);
+
+ GimpAnchor * (* anchor_get) (GimpStroke *stroke,
+ const GimpCoords *coord);
+ gdouble (* nearest_point_get) (GimpStroke *stroke,
+ const GimpCoords *coord,
+ gdouble precision,
+ GimpCoords *ret_point,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+ gdouble (* nearest_tangent_get) (GimpStroke *stroke,
+ const GimpCoords *coord1,
+ const GimpCoords *coord2,
+ gdouble precision,
+ GimpCoords *nearest,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+ gdouble (* nearest_intersection_get)
+ (GimpStroke *stroke,
+ const GimpCoords *coord1,
+ const GimpCoords *direction,
+ gdouble precision,
+ GimpCoords *nearest,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+ GimpAnchor * (* anchor_get_next) (GimpStroke *stroke,
+ const GimpAnchor *prev);
+ void (* anchor_select) (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ gboolean selected,
+ gboolean exclusive);
+ void (* anchor_move_relative) (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ const GimpCoords *deltacoord,
+ GimpAnchorFeatureType feature);
+ void (* anchor_move_absolute) (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ const GimpCoords *coord,
+ GimpAnchorFeatureType feature);
+ void (* anchor_convert) (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ GimpAnchorFeatureType feature);
+ void (* anchor_delete) (GimpStroke *stroke,
+ GimpAnchor *anchor);
+
+ gboolean (* point_is_movable) (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+ void (* point_move_relative) (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position,
+ const GimpCoords *deltacoord,
+ GimpAnchorFeatureType feature);
+ void (* point_move_absolute) (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position,
+ const GimpCoords *coord,
+ GimpAnchorFeatureType feature);
+
+ void (* close) (GimpStroke *stroke);
+ GimpStroke * (* open) (GimpStroke *stroke,
+ GimpAnchor *end_anchor);
+ gboolean (* anchor_is_insertable) (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+ GimpAnchor * (* anchor_insert) (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+ gboolean (* is_extendable) (GimpStroke *stroke,
+ GimpAnchor *neighbor);
+ GimpAnchor * (* extend) (GimpStroke *stroke,
+ const GimpCoords *coords,
+ GimpAnchor *neighbor,
+ GimpVectorExtendMode extend_mode);
+ gboolean (* connect_stroke) (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ GimpStroke *extension,
+ GimpAnchor *neighbor);
+
+ gboolean (* is_empty) (GimpStroke *stroke);
+ gdouble (* get_length) (GimpStroke *stroke,
+ gdouble precision);
+ gdouble (* get_distance) (GimpStroke *stroke,
+ const GimpCoords *coord);
+ gboolean (* get_point_at_dist) (GimpStroke *stroke,
+ gdouble dist,
+ gdouble precision,
+ GimpCoords *position,
+ gdouble *slope);
+
+ GArray * (* interpolate) (GimpStroke *stroke,
+ gdouble precision,
+ gboolean *ret_closed);
+
+ GimpStroke * (* duplicate) (GimpStroke *stroke);
+
+ GimpBezierDesc * (* make_bezier) (GimpStroke *stroke);
+
+ void (* translate) (GimpStroke *stroke,
+ gdouble offset_x,
+ gdouble offset_y);
+ void (* scale) (GimpStroke *stroke,
+ gdouble scale_x,
+ gdouble scale_y);
+ void (* rotate) (GimpStroke *stroke,
+ gdouble center_x,
+ gdouble center_y,
+ gdouble angle);
+ void (* flip) (GimpStroke *stroke,
+ GimpOrientationType flip_type,
+ gdouble axis);
+ void (* flip_free) (GimpStroke *stroke,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2);
+ void (* transform) (GimpStroke *stroke,
+ const GimpMatrix3 *matrix,
+ GQueue *ret_strokes);
+
+ GList * (* get_draw_anchors) (GimpStroke *stroke);
+ GList * (* get_draw_controls) (GimpStroke *stroke);
+ GArray * (* get_draw_lines) (GimpStroke *stroke);
+ GArray * (* control_points_get) (GimpStroke *stroke,
+ gboolean *ret_closed);
+};
+
+
+GType gimp_stroke_get_type (void) G_GNUC_CONST;
+
+void gimp_stroke_set_ID (GimpStroke *stroke,
+ gint id);
+gint gimp_stroke_get_ID (GimpStroke *stroke);
+
+
+/* accessing / modifying the anchors */
+
+GArray * gimp_stroke_control_points_get (GimpStroke *stroke,
+ gboolean *closed);
+
+GimpAnchor * gimp_stroke_anchor_get (GimpStroke *stroke,
+ const GimpCoords *coord);
+
+gdouble gimp_stroke_nearest_point_get (GimpStroke *stroke,
+ const GimpCoords *coord,
+ gdouble precision,
+ GimpCoords *ret_point,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+gdouble gimp_stroke_nearest_tangent_get (GimpStroke *stroke,
+ const GimpCoords *coords1,
+ const GimpCoords *coords2,
+ gdouble precision,
+ GimpCoords *nearest,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+gdouble gimp_stroke_nearest_intersection_get (GimpStroke *stroke,
+ const GimpCoords *coords1,
+ const GimpCoords *direction,
+ gdouble precision,
+ GimpCoords *nearest,
+ GimpAnchor **ret_segment_start,
+ GimpAnchor **ret_segment_end,
+ gdouble *ret_pos);
+
+
+/* prev == NULL: "first" anchor */
+GimpAnchor * gimp_stroke_anchor_get_next (GimpStroke *stroke,
+ const GimpAnchor *prev);
+
+void gimp_stroke_anchor_select (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ gboolean selected,
+ gboolean exclusive);
+
+/* type will be an xorable enum:
+ * VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE
+ * or so.
+ */
+void gimp_stroke_anchor_move_relative (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ const GimpCoords *delta,
+ GimpAnchorFeatureType feature);
+void gimp_stroke_anchor_move_absolute (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ const GimpCoords *coord,
+ GimpAnchorFeatureType feature);
+
+gboolean gimp_stroke_point_is_movable (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+void gimp_stroke_point_move_relative (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position,
+ const GimpCoords *deltacoord,
+ GimpAnchorFeatureType feature);
+void gimp_stroke_point_move_absolute (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position,
+ const GimpCoords *coord,
+ GimpAnchorFeatureType feature);
+
+void gimp_stroke_close (GimpStroke *stroke);
+
+void gimp_stroke_anchor_convert (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ GimpAnchorFeatureType feature);
+
+void gimp_stroke_anchor_delete (GimpStroke *stroke,
+ GimpAnchor *anchor);
+
+GimpStroke * gimp_stroke_open (GimpStroke *stroke,
+ GimpAnchor *end_anchor);
+gboolean gimp_stroke_anchor_is_insertable (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+GimpAnchor * gimp_stroke_anchor_insert (GimpStroke *stroke,
+ GimpAnchor *predec,
+ gdouble position);
+
+gboolean gimp_stroke_is_extendable (GimpStroke *stroke,
+ GimpAnchor *neighbor);
+
+GimpAnchor * gimp_stroke_extend (GimpStroke *stroke,
+ const GimpCoords *coords,
+ GimpAnchor *neighbor,
+ GimpVectorExtendMode extend_mode);
+
+gboolean gimp_stroke_connect_stroke (GimpStroke *stroke,
+ GimpAnchor *anchor,
+ GimpStroke *extension,
+ GimpAnchor *neighbor);
+
+gboolean gimp_stroke_is_empty (GimpStroke *stroke);
+
+/* accessing the shape of the curve */
+
+gdouble gimp_stroke_get_length (GimpStroke *stroke,
+ gdouble precision);
+gdouble gimp_stroke_get_distance (GimpStroke *stroke,
+ const GimpCoords *coord);
+
+gboolean gimp_stroke_get_point_at_dist (GimpStroke *stroke,
+ gdouble dist,
+ gdouble precision,
+ GimpCoords *position,
+ gdouble *slope);
+
+/* returns an array of valid coordinates */
+GArray * gimp_stroke_interpolate (GimpStroke *stroke,
+ const gdouble precision,
+ gboolean *closed);
+
+GimpStroke * gimp_stroke_duplicate (GimpStroke *stroke);
+
+/* creates a bezier approximation. */
+GimpBezierDesc * gimp_stroke_make_bezier (GimpStroke *stroke);
+
+void gimp_stroke_translate (GimpStroke *stroke,
+ gdouble offset_x,
+ gdouble offset_y);
+void gimp_stroke_scale (GimpStroke *stroke,
+ gdouble scale_x,
+ gdouble scale_y);
+void gimp_stroke_rotate (GimpStroke *stroke,
+ gdouble center_x,
+ gdouble center_y,
+ gdouble angle);
+void gimp_stroke_flip (GimpStroke *stroke,
+ GimpOrientationType flip_type,
+ gdouble axis);
+void gimp_stroke_flip_free (GimpStroke *stroke,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2);
+void gimp_stroke_transform (GimpStroke *stroke,
+ const GimpMatrix3 *matrix,
+ GQueue *ret_strokes);
+
+
+GList * gimp_stroke_get_draw_anchors (GimpStroke *stroke);
+GList * gimp_stroke_get_draw_controls (GimpStroke *stroke);
+GArray * gimp_stroke_get_draw_lines (GimpStroke *stroke);
+
+#endif /* __GIMP_STROKE_H__ */
+
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