/* * 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 Sk1DPathEffect_DEFINED #define Sk1DPathEffect_DEFINED #include "SkPathEffect.h" #include "SkPath.h" class SkPathMeasure; // This class is not exported to java. class Sk1DPathEffect : public SkPathEffect { public: // override from SkPathEffect virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width); protected: /** Called at the start of each contour, returns the initial offset into that contour. */ virtual SkScalar begin(SkScalar contourLength) = 0; /** Called with the current distance along the path, with the current matrix for the point/tangent at the specified distance. Return the distance to travel for the next call. If return <= 0, then that contour is done. */ virtual SkScalar next(SkPath* dst, SkScalar distance, SkPathMeasure&) = 0; private: typedef SkPathEffect INHERITED; }; class SkPath1DPathEffect : public Sk1DPathEffect { public: enum Style { kTranslate_Style, // translate the shape to each position kRotate_Style, // rotate the shape about its center kMorph_Style, // transform each point, and turn lines into curves kStyleCount }; /** Dash by replicating the specified path. @param path The path to replicate (dash) @param advance The space between instances of path @param phase distance (mod advance) along path for its initial position @param style how to transform path at each point (based on the current position and tangent) */ SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style); // override from SkPathEffect virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width); static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { return SkNEW_ARGS(SkPath1DPathEffect, (buffer)); } protected: SkPath1DPathEffect(SkFlattenableReadBuffer& buffer); // overrides from Sk1DPathEffect virtual SkScalar begin(SkScalar contourLength); virtual SkScalar next(SkPath* dst, SkScalar distance, SkPathMeasure&); // overrides from SkFlattenable virtual void flatten(SkFlattenableWriteBuffer& ); virtual Factory getFactory() { return CreateProc; } private: SkPath fPath; // copied from constructor SkScalar fAdvance; // copied from constructor SkScalar fInitialOffset; // computed from phase Style fStyle; // copied from constructor typedef Sk1DPathEffect INHERITED; }; #endif