1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/effects/Sk1DPathEffect.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,87 @@
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 Sk1DPathEffect_DEFINED
1.12 +#define Sk1DPathEffect_DEFINED
1.13 +
1.14 +#include "SkPathEffect.h"
1.15 +#include "SkPath.h"
1.16 +
1.17 +class SkPathMeasure;
1.18 +
1.19 +// This class is not exported to java.
1.20 +class SK_API Sk1DPathEffect : public SkPathEffect {
1.21 +public:
1.22 + virtual bool filterPath(SkPath* dst, const SkPath& src,
1.23 + SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
1.24 +
1.25 +protected:
1.26 + /** Called at the start of each contour, returns the initial offset
1.27 + into that contour.
1.28 + */
1.29 + virtual SkScalar begin(SkScalar contourLength) const = 0;
1.30 + /** Called with the current distance along the path, with the current matrix
1.31 + for the point/tangent at the specified distance.
1.32 + Return the distance to travel for the next call. If return <= 0, then that
1.33 + contour is done.
1.34 + */
1.35 + virtual SkScalar next(SkPath* dst, SkScalar dist, SkPathMeasure&) const = 0;
1.36 +
1.37 +private:
1.38 + typedef SkPathEffect INHERITED;
1.39 +};
1.40 +
1.41 +class SK_API SkPath1DPathEffect : public Sk1DPathEffect {
1.42 +public:
1.43 + enum Style {
1.44 + kTranslate_Style, // translate the shape to each position
1.45 + kRotate_Style, // rotate the shape about its center
1.46 + kMorph_Style, // transform each point, and turn lines into curves
1.47 +
1.48 + kStyleCount
1.49 + };
1.50 +
1.51 + /** Dash by replicating the specified path.
1.52 + @param path The path to replicate (dash)
1.53 + @param advance The space between instances of path
1.54 + @param phase distance (mod advance) along path for its initial position
1.55 + @param style how to transform path at each point (based on the current
1.56 + position and tangent)
1.57 + */
1.58 + static SkPath1DPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase,
1.59 + Style style) {
1.60 + return SkNEW_ARGS(SkPath1DPathEffect, (path, advance, phase, style));
1.61 + }
1.62 +
1.63 + virtual bool filterPath(SkPath*, const SkPath&,
1.64 + SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
1.65 +
1.66 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect)
1.67 +
1.68 +protected:
1.69 + SkPath1DPathEffect(SkReadBuffer& buffer);
1.70 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.71 +
1.72 + // overrides from Sk1DPathEffect
1.73 + virtual SkScalar begin(SkScalar contourLength) const SK_OVERRIDE;
1.74 + virtual SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const SK_OVERRIDE;
1.75 +
1.76 +#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
1.77 +public:
1.78 +#endif
1.79 + SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
1.80 +
1.81 +private:
1.82 + SkPath fPath; // copied from constructor
1.83 + SkScalar fAdvance; // copied from constructor
1.84 + SkScalar fInitialOffset; // computed from phase
1.85 + Style fStyle; // copied from constructor
1.86 +
1.87 + typedef Sk1DPathEffect INHERITED;
1.88 +};
1.89 +
1.90 +#endif
