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comparison: gfx/skia/trunk/include/effects/SkDashPathEffect.h
gfx/skia/trunk/include/effects/SkDashPathEffect.h
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:8546a42d2cd1 |
|---|---|
| 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 */ | |
| 7 | |
| 8 #ifndef SkDashPathEffect_DEFINED | |
| 9 #define SkDashPathEffect_DEFINED | |
| 10 | |
| 11 #include "SkPathEffect.h" | |
| 12 | |
| 13 /** \class SkDashPathEffect | |
| 14 | |
| 15 SkDashPathEffect is a subclass of SkPathEffect that implements dashing | |
| 16 */ | |
| 17 class SK_API SkDashPathEffect : public SkPathEffect { | |
| 18 public: | |
| 19 /** intervals: array containing an even number of entries (>=2), with | |
| 20 the even indices specifying the length of "on" intervals, and the odd | |
| 21 indices specifying the length of "off" intervals. | |
| 22 count: number of elements in the intervals array | |
| 23 phase: offset into the intervals array (mod the sum of all of the | |
| 24 intervals). | |
| 25 | |
| 26 For example: if intervals[] = {10, 20}, count = 2, and phase = 25, | |
| 27 this will set up a dashed path like so: | |
| 28 5 pixels off | |
| 29 10 pixels on | |
| 30 20 pixels off | |
| 31 10 pixels on | |
| 32 20 pixels off | |
| 33 ... | |
| 34 A phase of -5, 25, 55, 85, etc. would all result in the same path, | |
| 35 because the sum of all the intervals is 30. | |
| 36 | |
| 37 Note: only affects stroked paths. | |
| 38 */ | |
| 39 static SkDashPathEffect* Create(const SkScalar intervals[], int count, | |
| 40 SkScalar phase, bool scaleToFit = false) { | |
| 41 return SkNEW_ARGS(SkDashPathEffect, (intervals, count, phase, scaleToFit)); | |
| 42 } | |
| 43 virtual ~SkDashPathEffect(); | |
| 44 | |
| 45 virtual bool filterPath(SkPath* dst, const SkPath& src, | |
| 46 SkStrokeRec*, const SkRect*) const SK_OVERRIDE; | |
| 47 | |
| 48 virtual bool asPoints(PointData* results, const SkPath& src, | |
| 49 const SkStrokeRec&, const SkMatrix&, | |
| 50 const SkRect*) const SK_OVERRIDE; | |
| 51 | |
| 52 virtual Factory getFactory() const SK_OVERRIDE; | |
| 53 | |
| 54 static SkFlattenable* CreateProc(SkReadBuffer&); | |
| 55 | |
| 56 protected: | |
| 57 SkDashPathEffect(SkReadBuffer&); | |
| 58 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; | |
| 59 | |
| 60 #ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS | |
| 61 public: | |
| 62 #endif | |
| 63 SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase, | |
| 64 bool scaleToFit = false); | |
| 65 | |
| 66 private: | |
| 67 SkScalar* fIntervals; | |
| 68 int32_t fCount; | |
| 69 // computed from phase | |
| 70 SkScalar fInitialDashLength; | |
| 71 int32_t fInitialDashIndex; | |
| 72 SkScalar fIntervalLength; | |
| 73 bool fScaleToFit; | |
| 74 | |
| 75 typedef SkPathEffect INHERITED; | |
| 76 }; | |
| 77 | |
| 78 #endif |
