1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/effects/SkDashPathEffect.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,78 @@
1.4 +/*
1.5 + * Copyright 2006 The Android Open Source Project
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkDashPathEffect_DEFINED
1.12 +#define SkDashPathEffect_DEFINED
1.13 +
1.14 +#include "SkPathEffect.h"
1.15 +
1.16 +/** \class SkDashPathEffect
1.17 +
1.18 + SkDashPathEffect is a subclass of SkPathEffect that implements dashing
1.19 +*/
1.20 +class SK_API SkDashPathEffect : public SkPathEffect {
1.21 +public:
1.22 + /** intervals: array containing an even number of entries (>=2), with
1.23 + the even indices specifying the length of "on" intervals, and the odd
1.24 + indices specifying the length of "off" intervals.
1.25 + count: number of elements in the intervals array
1.26 + phase: offset into the intervals array (mod the sum of all of the
1.27 + intervals).
1.28 +
1.29 + For example: if intervals[] = {10, 20}, count = 2, and phase = 25,
1.30 + this will set up a dashed path like so:
1.31 + 5 pixels off
1.32 + 10 pixels on
1.33 + 20 pixels off
1.34 + 10 pixels on
1.35 + 20 pixels off
1.36 + ...
1.37 + A phase of -5, 25, 55, 85, etc. would all result in the same path,
1.38 + because the sum of all the intervals is 30.
1.39 +
1.40 + Note: only affects stroked paths.
1.41 + */
1.42 + static SkDashPathEffect* Create(const SkScalar intervals[], int count,
1.43 + SkScalar phase, bool scaleToFit = false) {
1.44 + return SkNEW_ARGS(SkDashPathEffect, (intervals, count, phase, scaleToFit));
1.45 + }
1.46 + virtual ~SkDashPathEffect();
1.47 +
1.48 + virtual bool filterPath(SkPath* dst, const SkPath& src,
1.49 + SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
1.50 +
1.51 + virtual bool asPoints(PointData* results, const SkPath& src,
1.52 + const SkStrokeRec&, const SkMatrix&,
1.53 + const SkRect*) const SK_OVERRIDE;
1.54 +
1.55 + virtual Factory getFactory() const SK_OVERRIDE;
1.56 +
1.57 + static SkFlattenable* CreateProc(SkReadBuffer&);
1.58 +
1.59 +protected:
1.60 + SkDashPathEffect(SkReadBuffer&);
1.61 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.62 +
1.63 +#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
1.64 +public:
1.65 +#endif
1.66 + SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase,
1.67 + bool scaleToFit = false);
1.68 +
1.69 +private:
1.70 + SkScalar* fIntervals;
1.71 + int32_t fCount;
1.72 + // computed from phase
1.73 + SkScalar fInitialDashLength;
1.74 + int32_t fInitialDashIndex;
1.75 + SkScalar fIntervalLength;
1.76 + bool fScaleToFit;
1.77 +
1.78 + typedef SkPathEffect INHERITED;
1.79 +};
1.80 +
1.81 +#endif
