1 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : * ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is IBM Corporation code.
16 : *
17 : * The Initial Developer of the Original Code is IBM Corporation.
18 : * Portions created by the Initial Developer are Copyright (C) 2007
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : *
23 : * Alternatively, the contents of this file may be used under the terms of
24 : * either the GNU General Public License Version 2 or later (the "GPL"), or
25 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26 : * in which case the provisions of the GPL or the LGPL are applicable instead
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35 : * ***** END LICENSE BLOCK ***** */
36 :
37 : #ifndef GFX_PATH_H
38 : #define GFX_PATH_H
39 :
40 : #include "gfxTypes.h"
41 : #include "nsISupportsImpl.h"
42 :
43 : class gfxContext;
44 : struct gfxPoint;
45 : typedef struct cairo_path cairo_path_t;
46 :
47 : /**
48 : * Class representing a path. Can be created by copying the current path
49 : * of a gfxContext.
50 : */
51 : class THEBES_API gfxPath {
52 0 : NS_INLINE_DECL_REFCOUNTING(gfxPath)
53 :
54 : friend class gfxContext;
55 :
56 : protected:
57 : gfxPath(cairo_path_t* aPath);
58 :
59 : public:
60 : virtual ~gfxPath();
61 :
62 : protected:
63 : cairo_path_t* mPath;
64 : };
65 :
66 : /**
67 : * Specialization of a path that only contains linear pieces. Can be created
68 : * from the existing path of a gfxContext.
69 : */
70 : class THEBES_API gfxFlattenedPath : public gfxPath {
71 : friend class gfxContext;
72 :
73 : protected:
74 : gfxFlattenedPath(cairo_path_t* aPath);
75 :
76 : public:
77 : virtual ~gfxFlattenedPath();
78 :
79 : /**
80 : * Returns calculated total length of path
81 : */
82 : gfxFloat GetLength();
83 :
84 : /**
85 : * Returns a point a certain distance along the path. Return is
86 : * first or last point of the path if the requested length offset
87 : * is outside the range for the path.
88 : * @param aOffset offset inpath parameter space (x=length, y=normal offset)
89 : * @param aAngle optional - output tangent
90 : */
91 : gfxPoint FindPoint(gfxPoint aOffset,
92 : gfxFloat* aAngle = nsnull);
93 : };
94 :
95 : #endif
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