path.h revision 165cb19abc4279839b0f5f53eb2feac60c2f415e 
1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27#ifndef _PATH_H
28#define _PATH_H
29
30#include "VG/openvg.h"
31
32struct path;
33struct polygon;
34struct matrix;
35
36enum fill_rule {
37   ODD_EVEN_FILL,
38   WINDING_FILL
39};
40
41
42struct path_for_each_data {
43   VGubyte segment;
44   /* all coords are absolute, even if segment is relative */
45   const VGfloat *coords;
46   VGfloat sx, sy, ox, oy, px, py;
47   void *user_data;
48};
49
50typedef VGboolean (*path_for_each_cb)(struct path *p,
51                                      struct path_for_each_data *data);
52
53
54struct path *path_create(VGPathDatatype dt, VGfloat scale, VGfloat bias,
55                         VGint segmentCapacityHint,
56                         VGint coordCapacityHint,
57                         VGbitfield capabilities);
58void path_destroy(struct path *p);
59
60VGbitfield path_capabilities(struct path *p);
61void path_set_capabilities(struct path *p, VGbitfield bf);
62
63void path_append_data(struct path *p,
64                      VGint numSegments,
65                      const VGubyte * pathSegments,
66                      const void * pathData);
67
68void path_append_path(struct path *dst,
69                      struct path *src);
70
71VGint path_num_segments(struct path *p);
72
73void path_bounding_rect(struct path *p, float *x, float *y,
74                        float *w, float *h);
75float path_length(struct path *p, int start_segment, int num_segments);
76
77void path_set_fill_rule(enum fill_rule fill);
78enum fill_rule path_fill_rule(enum fill_rule fill);
79
80VGboolean path_is_empty(struct path *p);
81
82VGbyte path_datatype_size(struct path *p);
83
84VGPathDatatype path_datatype(struct path *p);
85VGfloat path_scale(struct path *p);
86VGfloat path_bias(struct path *p);
87VGint path_num_coords(struct path *p);
88
89void path_modify_coords(struct path *p,
90                        VGint startIndex,
91                        VGint numSegments,
92                        const void * pathData);
93
94struct path *path_create_stroke(struct path *p,
95                                struct matrix *m);
96
97void path_for_each_segment(struct path *path,
98                           path_for_each_cb cb,
99                           void *user_data);
100
101void path_transform(struct path *dst, struct path *src);
102VGboolean path_interpolate(struct path *dst,
103                           struct path *start, struct path *end,
104                           VGfloat amount);
105
106void path_clear(struct path *p, VGbitfield capabilities);
107void path_render(struct path *p, VGbitfield paintModes, struct matrix *mat);
108void path_fill(struct path *p, struct matrix *mat);
109void path_stroke(struct path *p, struct matrix *mat);
110
111void path_move_to(struct path *p, float x, float y);
112void path_line_to(struct path *p, float x, float y);
113void path_cubic_to(struct path *p, float px1, float py1,
114                   float px2, float py2,
115                   float x, float y);
116
117void path_point(struct path *p, VGint startSegment, VGint numSegments,
118                VGfloat distance, VGfloat *point, VGfloat *normal);
119
120
121
122void vg_float_to_datatype(VGPathDatatype datatype,
123                          VGubyte *common_data,
124                          const VGfloat *data,
125                          VGint num_coords);
126#endif
127