| /* |
| * 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/base/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 possibly 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 |