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- /*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkPathMeasure_DEFINED
- #define SkPathMeasure_DEFINED
- #include "include/core/SkContourMeasure.h"
- #include "include/core/SkPath.h"
- #include "include/private/SkTDArray.h"
- class SK_API SkPathMeasure {
- public:
- SkPathMeasure();
- /** Initialize the pathmeasure with the specified path. The parts of the path that are needed
- * are copied, so the client is free to modify/delete the path after this call.
- *
- * resScale controls the precision of the measure. values > 1 increase the
- * precision (and possible slow down the computation).
- */
- SkPathMeasure(const SkPath& path, bool forceClosed, SkScalar resScale = 1);
- ~SkPathMeasure();
- /** Reset the pathmeasure with the specified path. The parts of the path that are needed
- * are copied, so the client is free to modify/delete the path after this call..
- */
- void setPath(const SkPath*, bool forceClosed);
- /** Return the total length of the current contour, or 0 if no path
- is associated (e.g. resetPath(null))
- */
- SkScalar getLength();
- /** Pins distance to 0 <= distance <= getLength(), and then computes
- the corresponding position and tangent.
- Returns false if there is no path, or a zero-length path was specified, in which case
- position and tangent are unchanged.
- */
- bool SK_WARN_UNUSED_RESULT getPosTan(SkScalar distance, SkPoint* position,
- SkVector* tangent);
- enum MatrixFlags {
- kGetPosition_MatrixFlag = 0x01,
- kGetTangent_MatrixFlag = 0x02,
- kGetPosAndTan_MatrixFlag = kGetPosition_MatrixFlag | kGetTangent_MatrixFlag
- };
- /** Pins distance to 0 <= distance <= getLength(), and then computes
- the corresponding matrix (by calling getPosTan).
- Returns false if there is no path, or a zero-length path was specified, in which case
- matrix is unchanged.
- */
- bool SK_WARN_UNUSED_RESULT getMatrix(SkScalar distance, SkMatrix* matrix,
- MatrixFlags flags = kGetPosAndTan_MatrixFlag);
- /** Given a start and stop distance, return in dst the intervening segment(s).
- If the segment is zero-length, return false, else return true.
- startD and stopD are pinned to legal values (0..getLength()). If startD > stopD
- then return false (and leave dst untouched).
- Begin the segment with a moveTo if startWithMoveTo is true
- */
- bool getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, bool startWithMoveTo);
- /** Return true if the current contour is closed()
- */
- bool isClosed();
- /** Move to the next contour in the path. Return true if one exists, or false if
- we're done with the path.
- */
- bool nextContour();
- #ifdef SK_DEBUG
- void dump();
- #endif
- private:
- SkContourMeasureIter fIter;
- sk_sp<SkContourMeasure> fContour;
- SkPathMeasure(const SkPathMeasure&) = delete;
- SkPathMeasure& operator=(const SkPathMeasure&) = delete;
- };
- #endif
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