text: /* Copyright 2006, Google Inc.
  **
  ** Licensed under the Apache License, Version 2.0 (the "License"); 
  ** you may not use this file except in compliance with the License. 
  ** You may obtain a copy of the License at 
  **
  **     http://www.apache.org/licenses/LICENSE-2.0 
  **
  ** Unless required by applicable law or agreed to in writing, software 
  ** distributed under the License is distributed on an "AS IS" BASIS, 
  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
  ** See the License for the specific language governing permissions and 
  ** limitations under the License.
  */
  
  #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);
  
  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
      
      static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
          return SkNEW_ARGS(SkPath1DPathEffect, (buffer));
      }
  
      typedef Sk1DPathEffect INHERITED;
  };
  
  
  #endif
  