| /* |
| * 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 SkDashPathEffect_DEFINED |
| #define SkDashPathEffect_DEFINED |
| |
| #include "SkPathEffect.h" |
| |
| /** \class SkDashPathEffect |
| |
| SkDashPathEffect is a subclass of SkPathEffect that implements dashing |
| */ |
| class SK_API SkDashPathEffect : public SkPathEffect { |
| public: |
| /** intervals: array containing an even number of entries (>=2), with |
| the even indices specifying the length of "on" intervals, and the odd |
| indices specifying the length of "off" intervals. |
| count: number of elements in the intervals array |
| phase: offset into the intervals array (mod the sum of all of the |
| intervals). |
| |
| For example: if intervals[] = {10, 20}, count = 2, and phase = 25, |
| this will set up a dashed path like so: |
| 5 pixels off |
| 10 pixels on |
| 20 pixels off |
| 10 pixels on |
| 20 pixels off |
| ... |
| A phase of -5, 25, 55, 85, etc. would all result in the same path, |
| because the sum of all the intervals is 30. |
| |
| Note: only affects stroked paths. |
| */ |
| static SkDashPathEffect* Create(const SkScalar intervals[], int count, |
| SkScalar phase) { |
| return SkNEW_ARGS(SkDashPathEffect, (intervals, count, phase)); |
| } |
| virtual ~SkDashPathEffect(); |
| |
| virtual bool filterPath(SkPath* dst, const SkPath& src, |
| SkStrokeRec*, const SkRect*) const SK_OVERRIDE; |
| |
| virtual bool asPoints(PointData* results, const SkPath& src, |
| const SkStrokeRec&, const SkMatrix&, |
| const SkRect*) const SK_OVERRIDE; |
| |
| virtual DashType asADash(DashInfo* info) const SK_OVERRIDE; |
| |
| virtual Factory getFactory() const SK_OVERRIDE; |
| |
| static SkFlattenable* CreateProc(SkReadBuffer&); |
| |
| protected: |
| SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase); |
| explicit SkDashPathEffect(SkReadBuffer&); |
| virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
| |
| private: |
| void setInternalMembers(SkScalar phase); |
| |
| SkScalar* fIntervals; |
| int32_t fCount; |
| SkScalar fPhase; |
| // computed from phase |
| SkScalar fInitialDashLength; |
| int32_t fInitialDashIndex; |
| SkScalar fIntervalLength; |
| |
| typedef SkPathEffect INHERITED; |
| }; |
| |
| #endif |