1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkCullPoints_DEFINED 11 #define SkCullPoints_DEFINED 12 13 #include "SkRect.h" 14 15 class SkCullPoints { 16 public: 17 SkCullPoints(); 18 SkCullPoints(const SkIRect& r); 19 20 void reset(const SkIRect& r); 21 22 /** Start a contour at (x,y). Follow this with call(s) to lineTo(...) 23 */ 24 void moveTo(int x, int y); 25 26 enum LineToResult { 27 kNo_Result, //!< line segment was completely clipped out 28 kLineTo_Result, //!< path.lineTo(pts[1]); 29 kMoveToLineTo_Result //!< path.moveTo(pts[0]); path.lineTo(pts[1]); 30 }; 31 /** Connect a line to the previous call to lineTo (or moveTo). 32 */ 33 LineToResult lineTo(int x, int y, SkIPoint pts[2]); 34 35 private: 36 SkIRect fR; // the caller's rectangle 37 SkIPoint fAsQuad[4]; // cache of fR as 4 points 38 SkIPoint fPrevPt; // private state 39 LineToResult fPrevResult; // private state 40 41 bool sect_test(int x0, int y0, int x1, int y1) const; 42 }; 43 44 ///////////////////////////////////////////////////////////////////////////////// 45 46 class SkPath; 47 48 /** \class SkCullPointsPath 49 50 Similar to SkCullPoints, but this class handles the return values 51 from lineTo, and automatically builds a SkPath with the result(s). 52 */ 53 class SkCullPointsPath { 54 public: 55 SkCullPointsPath(); 56 SkCullPointsPath(const SkIRect& r, SkPath* dst); 57 58 void reset(const SkIRect& r, SkPath* dst); 59 60 void moveTo(int x, int y); 61 void lineTo(int x, int y); 62 63 private: 64 SkCullPoints fCP; 65 SkPath* fPath; 66 }; 67 68 bool SkHitTestPath(const SkPath&, SkRect& target, bool hires); 69 bool SkHitTestPath(const SkPath&, SkScalar x, SkScalar y, bool hires); 70 71 #endif 72
