gfx/skia/trunk/include/core/SkPathMeasure.h@129ffea94266
gfx/skia/trunk/include/core/SkPathMeasure.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
8 #ifndef SkPathMeasure_DEFINED
9 #define SkPathMeasure_DEFINED
11 #include "SkPath.h"
12 #include "SkTDArray.h"
14 class SK_API SkPathMeasure : SkNoncopyable {
15 public:
16 SkPathMeasure();
17 /** Initialize the pathmeasure with the specified path. The path must remain valid
18 for the lifetime of the measure object, or until setPath() is called with
19 a different path (or null), since the measure object keeps a pointer to the
20 path object (does not copy its data).
21 */
22 SkPathMeasure(const SkPath& path, bool forceClosed);
23 ~SkPathMeasure();
25 /** Reset the pathmeasure with the specified path. The path must remain valid
26 for the lifetime of the measure object, or until setPath() is called with
27 a different path (or null), since the measure object keeps a pointer to the
28 path object (does not copy its data).
29 */
30 void setPath(const SkPath*, bool forceClosed);
32 /** Return the total length of the current contour, or 0 if no path
33 is associated (e.g. resetPath(null))
34 */
35 SkScalar getLength();
37 /** Pins distance to 0 <= distance <= getLength(), and then computes
38 the corresponding position and tangent.
39 Returns false if there is no path, or a zero-length path was specified, in which case
40 position and tangent are unchanged.
41 */
42 bool SK_WARN_UNUSED_RESULT getPosTan(SkScalar distance, SkPoint* position,
43 SkVector* tangent);
45 enum MatrixFlags {
46 kGetPosition_MatrixFlag = 0x01,
47 kGetTangent_MatrixFlag = 0x02,
48 kGetPosAndTan_MatrixFlag = kGetPosition_MatrixFlag | kGetTangent_MatrixFlag
49 };
51 /** Pins distance to 0 <= distance <= getLength(), and then computes
52 the corresponding matrix (by calling getPosTan).
53 Returns false if there is no path, or a zero-length path was specified, in which case
54 matrix is unchanged.
55 */
56 bool SK_WARN_UNUSED_RESULT getMatrix(SkScalar distance, SkMatrix* matrix,
57 MatrixFlags flags = kGetPosAndTan_MatrixFlag);
59 /** Given a start and stop distance, return in dst the intervening segment(s).
60 If the segment is zero-length, return false, else return true.
61 startD and stopD are pinned to legal values (0..getLength()). If startD <= stopD
62 then return false (and leave dst untouched).
63 Begin the segment with a moveTo if startWithMoveTo is true
64 */
65 bool getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, bool startWithMoveTo);
67 /** Return true if the current contour is closed()
68 */
69 bool isClosed();
71 /** Move to the next contour in the path. Return true if one exists, or false if
72 we're done with the path.
73 */
74 bool nextContour();
76 #ifdef SK_DEBUG
77 void dump();
78 #endif
80 private:
81 SkPath::Iter fIter;
82 const SkPath* fPath;
83 SkScalar fLength; // relative to the current contour
84 int fFirstPtIndex; // relative to the current contour
85 bool fIsClosed; // relative to the current contour
86 bool fForceClosed;
88 struct Segment {
89 SkScalar fDistance; // total distance up to this point
90 unsigned fPtIndex : 15; // index into the fPts array
91 unsigned fTValue : 15;
92 unsigned fType : 2;
94 SkScalar getScalarT() const;
95 };
96 SkTDArray<Segment> fSegments;
97 SkTDArray<SkPoint> fPts; // Points used to define the segments
99 static const Segment* NextSegment(const Segment*);
101 void buildSegments();
102 SkScalar compute_quad_segs(const SkPoint pts[3], SkScalar distance,
103 int mint, int maxt, int ptIndex);
104 SkScalar compute_cubic_segs(const SkPoint pts[3], SkScalar distance,
105 int mint, int maxt, int ptIndex);
106 const Segment* distanceToSegment(SkScalar distance, SkScalar* t);
107 };
109 #endif
