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 STROKER_H
28 #define STROKER_H
29 
30 #include "VG/openvg.h"
31 #include "api_consts.h"
32 
33 struct path;
34 struct vg_state;
35 struct array;
36 
37 struct stroker {
38    void (*begin)(struct stroker *stroker);
39    void (*process_subpath)(struct stroker *stroker);
40    void (*end)(struct stroker *stroker);
41 
42    struct array *segments;
43    struct array *control_points;
44    struct path *path;
45 
46    VGfloat back1_x, back1_y;
47    VGfloat back2_x, back2_y;
48 
49    VGfloat     stroke_width;
50    VGfloat     miter_limit;
51    VGCapStyle  cap_style;
52    VGJoinStyle join_style;
53 
54    VGPathCommand last_cmd;
55 };
56 
57 struct dash_stroker {
58    struct stroker base;
59 
60    struct stroker stroker;
61 
62    VGfloat dash_pattern[VEGA_MAX_DASH_COUNT];
63    VGint dash_pattern_num;
64    VGfloat dash_phase;
65    VGboolean dash_phase_reset;
66 };
67 
68 void stroker_init(struct stroker *stroker,
69                   struct vg_state *state);
70 void dash_stroker_init(struct stroker *stroker,
71                        struct vg_state *state);
72 void dash_stroker_cleanup(struct dash_stroker *stroker);
73 void stroker_cleanup(struct stroker *stroker);
74 
75 void stroker_begin(struct stroker *stroker);
76 void stroker_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
77 void stroker_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
78 void stroker_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
79                       VGfloat px2, VGfloat py2,
80                       VGfloat x, VGfloat y);
81 void stroker_end(struct stroker *stroker);
82 
83 void stroker_emit_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
84 void stroker_emit_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
85 void stroker_emit_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
86                            VGfloat px2, VGfloat py2,
87                            VGfloat x, VGfloat y);
88 
89 #endif
90