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1b5dfcba7e
This commit adds the basic infrastructure for paths. The public APIs consists of GskPath, GskPathPoint and GskPathBuilder. GskPath is a data structure for paths that consists of contours, which in turn might contain Bézier curves. The Bezier data structure is inspired by Skia, with separate arrays for points and operations. One advantage of this arrangement is that start and end points are shared between adjacent curves. A GskPathPoint represents a point on a path, which can be queried for various properties. GskPathBuilder is an auxiliary builder object for paths.
71 lines
3.0 KiB
C
71 lines
3.0 KiB
C
/*
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* Copyright © 2020 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#pragma once
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#include "gskpath.h"
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#include "gskpathopprivate.h"
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G_BEGIN_DECLS
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typedef enum
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{
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GSK_PATH_FLAT,
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GSK_PATH_CLOSED
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} GskPathFlags;
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typedef struct _GskContour GskContour;
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typedef struct _GskRealPathPoint GskRealPathPoint;
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/* Same as Skia, so looks like a good value. ¯\_(ツ)_/¯ */
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#define GSK_PATH_TOLERANCE_DEFAULT (0.5)
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GskPath * gsk_path_new_from_contours (const GSList *contours);
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gsize gsk_path_get_n_contours (const GskPath *self);
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const GskContour * gsk_path_get_contour (const GskPath *self,
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gsize i);
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GskPathFlags gsk_path_get_flags (const GskPath *self);
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gboolean gsk_path_foreach_with_tolerance (GskPath *self,
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GskPathForeachFlags flags,
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double tolerance,
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GskPathForeachFunc func,
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gpointer user_data);
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void gsk_path_builder_add_contour (GskPathBuilder *builder,
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GskContour *contour);
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void gsk_path_builder_svg_arc_to (GskPathBuilder *builder,
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float rx,
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float ry,
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float x_axis_rotation,
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gboolean large_arc,
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gboolean positive_sweep,
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float x,
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float y);
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G_END_DECLS
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