1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8// EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
9// DO NOT USE -- FOR INTERNAL TESTING ONLY
10
11#ifndef sk_path_DEFINED
12#define sk_path_DEFINED
13
14#include "sk_types.h"
15
16SK_C_PLUS_PLUS_BEGIN_GUARD
17
18typedef enum {
19    CW_SK_PATH_DIRECTION,
20    CCW_SK_PATH_DIRECTION,
21} sk_path_direction_t;
22
23/** Create a new, empty path. */
24SK_API sk_path_t* sk_path_new(void);
25/** Release the memory used by a sk_path_t. */
26SK_API void sk_path_delete(sk_path_t*);
27
28/** Set the beginning of the next contour to the point (x,y). */
29SK_API void sk_path_move_to(sk_path_t*, float x, float y);
30/**
31    Add a line from the last point to the specified point (x,y). If no
32    sk_path_move_to() call has been made for this contour, the first
33    point is automatically set to (0,0).
34*/
35SK_API void sk_path_line_to(sk_path_t*, float x, float y);
36/**
37    Add a quadratic bezier from the last point, approaching control
38    point (x0,y0), and ending at (x1,y1). If no sk_path_move_to() call
39    has been made for this contour, the first point is automatically
40    set to (0,0).
41*/
42SK_API void sk_path_quad_to(sk_path_t*, float x0, float y0, float x1, float y1);
43/**
44    Add a conic curve from the last point, approaching control point
45    (x0,y01), and ending at (x1,y1) with weight w.  If no
46    sk_path_move_to() call has been made for this contour, the first
47    point is automatically set to (0,0).
48*/
49SK_API void sk_path_conic_to(sk_path_t*, float x0, float y0, float x1, float y1, float w);
50/**
51    Add a cubic bezier from the last point, approaching control points
52    (x0,y0) and (x1,y1), and ending at (x2,y2). If no
53    sk_path_move_to() call has been made for this contour, the first
54    point is automatically set to (0,0).
55*/
56SK_API void sk_path_cubic_to(sk_path_t*,
57                             float x0, float y0,
58                             float x1, float y1,
59                             float x2, float y2);
60/**
61   Close the current contour. If the current point is not equal to the
62   first point of the contour, a line segment is automatically added.
63*/
64SK_API void sk_path_close(sk_path_t*);
65
66/**
67    Add a closed rectangle contour to the path.
68*/
69SK_API void sk_path_add_rect(sk_path_t*, const sk_rect_t*, sk_path_direction_t);
70/**
71    Add a closed oval contour to the path
72*/
73SK_API void sk_path_add_oval(sk_path_t*, const sk_rect_t*, sk_path_direction_t);
74
75/**
76 *  If the path is empty, return false and set the rect parameter to [0, 0, 0, 0].
77 *  else return true and set the rect parameter to the bounds of the control-points
78 *  of the path.
79 */
80SK_API bool sk_path_get_bounds(const sk_path_t*, sk_rect_t*);
81
82SK_C_PLUS_PLUS_END_GUARD
83
84#endif
85