michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef SkCullPoints_DEFINED
michael@0: #define SkCullPoints_DEFINED
michael@0: 
michael@0: #include "SkRect.h"
michael@0: 
michael@0: class SkCullPoints {
michael@0: public:
michael@0:     SkCullPoints();
michael@0:     SkCullPoints(const SkIRect& r);
michael@0: 
michael@0:     void    reset(const SkIRect& r);
michael@0: 
michael@0:     /** Start a contour at (x,y). Follow this with call(s) to lineTo(...)
michael@0:     */
michael@0:     void    moveTo(int x, int y);
michael@0: 
michael@0:     enum LineToResult {
michael@0:         kNo_Result,             //!< line segment was completely clipped out
michael@0:         kLineTo_Result,         //!< path.lineTo(pts[1]);
michael@0:         kMoveToLineTo_Result    //!< path.moveTo(pts[0]); path.lineTo(pts[1]);
michael@0:     };
michael@0:     /** Connect a line to the previous call to lineTo (or moveTo).
michael@0:     */
michael@0:     LineToResult lineTo(int x, int y, SkIPoint pts[2]);
michael@0: 
michael@0: private:
michael@0:     SkIRect      fR;             // the caller's rectangle
michael@0:     SkIPoint     fAsQuad[4];     // cache of fR as 4 points
michael@0:     SkIPoint     fPrevPt;        // private state
michael@0:     LineToResult fPrevResult;   // private state
michael@0: 
michael@0:     bool sect_test(int x0, int y0, int x1, int y1) const;
michael@0: };
michael@0: 
michael@0: /////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class SkPath;
michael@0: 
michael@0: /** \class SkCullPointsPath
michael@0: 
michael@0:     Similar to SkCullPoints, but this class handles the return values
michael@0:     from lineTo, and automatically builds a SkPath with the result(s).
michael@0: */
michael@0: class SkCullPointsPath {
michael@0: public:
michael@0:     SkCullPointsPath();
michael@0:     SkCullPointsPath(const SkIRect& r, SkPath* dst);
michael@0: 
michael@0:     void reset(const SkIRect& r, SkPath* dst);
michael@0: 
michael@0:     void    moveTo(int x, int y);
michael@0:     void    lineTo(int x, int y);
michael@0: 
michael@0: private:
michael@0:     SkCullPoints    fCP;
michael@0:     SkPath*         fPath;
michael@0: };
michael@0: 
michael@0: bool SkHitTestPath(const SkPath&, SkRect& target, bool hires);
michael@0: bool SkHitTestPath(const SkPath&, SkScalar x, SkScalar y, bool hires);
michael@0: 
michael@0: #endif