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gfx/skia/trunk/include/core/SkPathMeasure.h@129ffea94266 (annotated)

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.

michael@0	1	/*
michael@0	2	* Copyright 2006 The Android Open Source Project
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license that can be
michael@0	5	* found in the LICENSE file.
michael@0	6	*/
michael@0	7
michael@0	8	#ifndef SkPathMeasure_DEFINED
michael@0	9	#define SkPathMeasure_DEFINED
michael@0	10
michael@0	11	#include "SkPath.h"
michael@0	12	#include "SkTDArray.h"
michael@0	13
michael@0	14	class SK_API SkPathMeasure : SkNoncopyable {
michael@0	15	public:
michael@0	16	SkPathMeasure();
michael@0	17	/** Initialize the pathmeasure with the specified path. The path must remain valid
michael@0	18	for the lifetime of the measure object, or until setPath() is called with
michael@0	19	a different path (or null), since the measure object keeps a pointer to the
michael@0	20	path object (does not copy its data).
michael@0	21	*/
michael@0	22	SkPathMeasure(const SkPath& path, bool forceClosed);
michael@0	23	~SkPathMeasure();
michael@0	24
michael@0	25	/** Reset the pathmeasure with the specified path. The path must remain valid
michael@0	26	for the lifetime of the measure object, or until setPath() is called with
michael@0	27	a different path (or null), since the measure object keeps a pointer to the
michael@0	28	path object (does not copy its data).
michael@0	29	*/
michael@0	30	void setPath(const SkPath*, bool forceClosed);
michael@0	31
michael@0	32	/** Return the total length of the current contour, or 0 if no path
michael@0	33	is associated (e.g. resetPath(null))
michael@0	34	*/
michael@0	35	SkScalar getLength();
michael@0	36
michael@0	37	/** Pins distance to 0 <= distance <= getLength(), and then computes
michael@0	38	the corresponding position and tangent.
michael@0	39	Returns false if there is no path, or a zero-length path was specified, in which case
michael@0	40	position and tangent are unchanged.
michael@0	41	*/
michael@0	42	bool SK_WARN_UNUSED_RESULT getPosTan(SkScalar distance, SkPoint* position,
michael@0	43	SkVector* tangent);
michael@0	44
michael@0	45	enum MatrixFlags {
michael@0	46	kGetPosition_MatrixFlag = 0x01,
michael@0	47	kGetTangent_MatrixFlag = 0x02,
michael@0	48	kGetPosAndTan_MatrixFlag = kGetPosition_MatrixFlag | kGetTangent_MatrixFlag
michael@0	49	};
michael@0	50
michael@0	51	/** Pins distance to 0 <= distance <= getLength(), and then computes
michael@0	52	the corresponding matrix (by calling getPosTan).
michael@0	53	Returns false if there is no path, or a zero-length path was specified, in which case
michael@0	54	matrix is unchanged.
michael@0	55	*/
michael@0	56	bool SK_WARN_UNUSED_RESULT getMatrix(SkScalar distance, SkMatrix* matrix,
michael@0	57	MatrixFlags flags = kGetPosAndTan_MatrixFlag);
michael@0	58
michael@0	59	/** Given a start and stop distance, return in dst the intervening segment(s).
michael@0	60	If the segment is zero-length, return false, else return true.
michael@0	61	startD and stopD are pinned to legal values (0..getLength()). If startD <= stopD
michael@0	62	then return false (and leave dst untouched).
michael@0	63	Begin the segment with a moveTo if startWithMoveTo is true
michael@0	64	*/
michael@0	65	bool getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, bool startWithMoveTo);
michael@0	66
michael@0	67	/** Return true if the current contour is closed()
michael@0	68	*/
michael@0	69	bool isClosed();
michael@0	70
michael@0	71	/** Move to the next contour in the path. Return true if one exists, or false if
michael@0	72	we're done with the path.
michael@0	73	*/
michael@0	74	bool nextContour();
michael@0	75
michael@0	76	#ifdef SK_DEBUG
michael@0	77	void dump();
michael@0	78	#endif
michael@0	79
michael@0	80	private:
michael@0	81	SkPath::Iter fIter;
michael@0	82	const SkPath* fPath;
michael@0	83	SkScalar fLength; // relative to the current contour
michael@0	84	int fFirstPtIndex; // relative to the current contour
michael@0	85	bool fIsClosed; // relative to the current contour
michael@0	86	bool fForceClosed;
michael@0	87
michael@0	88	struct Segment {
michael@0	89	SkScalar fDistance; // total distance up to this point
michael@0	90	unsigned fPtIndex : 15; // index into the fPts array
michael@0	91	unsigned fTValue : 15;
michael@0	92	unsigned fType : 2;
michael@0	93
michael@0	94	SkScalar getScalarT() const;
michael@0	95	};
michael@0	96	SkTDArray<Segment> fSegments;
michael@0	97	SkTDArray<SkPoint> fPts; // Points used to define the segments
michael@0	98
michael@0	99	static const Segment* NextSegment(const Segment*);
michael@0	100
michael@0	101	void buildSegments();
michael@0	102	SkScalar compute_quad_segs(const SkPoint pts[3], SkScalar distance,
michael@0	103	int mint, int maxt, int ptIndex);
michael@0	104	SkScalar compute_cubic_segs(const SkPoint pts[3], SkScalar distance,
michael@0	105	int mint, int maxt, int ptIndex);
michael@0	106	const Segment* distanceToSegment(SkScalar distance, SkScalar* t);
michael@0	107	};
michael@0	108
michael@0	109	#endif