194 lines
5.7 KiB
C
194 lines
5.7 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 "gskpathbuilder.h"
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G_BEGIN_DECLS
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typedef gpointer gskpathop;
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static inline
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gskpathop gsk_pathop_encode (GskPathOperation op,
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const graphene_point_t *pts);
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static inline
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const graphene_point_t *gsk_pathop_points (gskpathop pop);
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static inline
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GskPathOperation gsk_pathop_op (gskpathop pop);
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static inline
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gboolean gsk_pathop_foreach (gskpathop pop,
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GskPathForeachFunc func,
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gpointer user_data);
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/* included inline so tests can use them */
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static inline
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void gsk_path_builder_pathop_to (GskPathBuilder *builder,
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gskpathop op);
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static inline
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void gsk_path_builder_pathop_reverse_to (GskPathBuilder *builder,
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gskpathop op);
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/* IMPLEMENTATION */
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/* Note:
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*
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* The weight of conics is encoded as p[2].x, and the endpoint is p[3].
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* This is important, since contours store the points of adjacent
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* operations overlapping, so we can't put the weight at the end.
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*/
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#define GSK_PATHOP_OPERATION_MASK (0x7)
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static inline gskpathop
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gsk_pathop_encode (GskPathOperation op,
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const graphene_point_t *pts)
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{
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/* g_assert (op & GSK_PATHOP_OPERATION_MASK == op); */
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g_assert ((GPOINTER_TO_SIZE (pts) & GSK_PATHOP_OPERATION_MASK) == 0);
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return GSIZE_TO_POINTER (GPOINTER_TO_SIZE (pts) | op);
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}
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static inline const graphene_point_t *
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gsk_pathop_points (gskpathop pop)
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{
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return GSIZE_TO_POINTER (GPOINTER_TO_SIZE (pop) & ~GSK_PATHOP_OPERATION_MASK);
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}
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static inline
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GskPathOperation gsk_pathop_op (gskpathop pop)
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{
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return GPOINTER_TO_SIZE (pop) & GSK_PATHOP_OPERATION_MASK;
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}
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static inline gboolean
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gsk_pathop_foreach (gskpathop pop,
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GskPathForeachFunc func,
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gpointer user_data)
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{
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switch (gsk_pathop_op (pop))
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{
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case GSK_PATH_MOVE:
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return func (gsk_pathop_op (pop), gsk_pathop_points (pop), 1, 0, user_data);
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case GSK_PATH_CLOSE:
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case GSK_PATH_LINE:
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return func (gsk_pathop_op (pop), gsk_pathop_points (pop), 2, 0, user_data);
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case GSK_PATH_QUAD:
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return func (gsk_pathop_op (pop), gsk_pathop_points (pop), 3, 0, user_data);
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case GSK_PATH_CUBIC:
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return func (gsk_pathop_op (pop), gsk_pathop_points (pop), 4, 0, user_data);
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case GSK_PATH_CONIC:
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{
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const graphene_point_t *pts = gsk_pathop_points (pop);
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return func (gsk_pathop_op (pop), (graphene_point_t[3]) { pts[0], pts[1], pts[3] }, 3, pts[2].x, user_data);
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}
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default:
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g_assert_not_reached ();
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return TRUE;
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}
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}
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static inline void
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gsk_path_builder_pathop_to (GskPathBuilder *builder,
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gskpathop op)
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{
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const graphene_point_t *pts = gsk_pathop_points (op);
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switch (gsk_pathop_op (op))
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{
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case GSK_PATH_MOVE:
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gsk_path_builder_move_to (builder, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_CLOSE:
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gsk_path_builder_close (builder);
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break;
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case GSK_PATH_LINE:
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gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
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break;
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case GSK_PATH_QUAD:
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gsk_path_builder_quad_to (builder, pts[1].x, pts[1].y, pts[2].x, pts[2].y);
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break;
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case GSK_PATH_CUBIC:
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gsk_path_builder_cubic_to (builder, pts[1].x, pts[1].y, pts[2].x, pts[2].y, pts[3].x, pts[3].y);
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break;
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case GSK_PATH_CONIC:
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gsk_path_builder_conic_to (builder, pts[1].x, pts[1].y, pts[3].x, pts[3].y, pts[2].x);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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static inline void
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gsk_path_builder_pathop_reverse_to (GskPathBuilder *builder,
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gskpathop op)
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{
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const graphene_point_t *pts = gsk_pathop_points (op);
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switch (gsk_pathop_op (op))
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{
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case GSK_PATH_MOVE:
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gsk_path_builder_move_to (builder, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_CLOSE:
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gsk_path_builder_line_to (builder, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_LINE:
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gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
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break;
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case GSK_PATH_QUAD:
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gsk_path_builder_quad_to (builder, pts[1].x, pts[1].y, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_CUBIC:
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gsk_path_builder_cubic_to (builder, pts[2].x, pts[2].y, pts[1].x, pts[1].y, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_CONIC:
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gsk_path_builder_conic_to (builder, pts[1].x, pts[1].y, pts[0].x, pts[0].y, pts[2].x);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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G_END_DECLS
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