1 2 /* 3 * Copyright 2010 Google Inc. 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 11 #ifndef GrClipIterator_DEFINED 12 #define GrClipIterator_DEFINED 13 14 #include "GrPath.h" 15 #include "GrRect.h" 16 17 /** 18 * A clip is a list of paths and/or rects with set operations to combine them. 19 */ 20 class GrClipIterator { 21 public: ~GrClipIterator()22 virtual ~GrClipIterator() {} 23 24 /** 25 * Returns true if there are no more rects to process 26 */ 27 virtual bool isDone() const = 0; 28 29 /** 30 * Rewind the iterator to replay the set of clip elements again 31 */ 32 virtual void rewind() = 0; 33 34 /** 35 * Get the type of the current clip element 36 */ 37 virtual GrClipType getType() const = 0; 38 39 /** 40 * Return the current path. It is an error to call this when isDone() is 41 * true or when getType() is kRect_Type. 42 */ 43 virtual const GrPath* getPath() = 0; 44 45 /** 46 * Return the fill rule for the path. It is an error to call this when 47 * isDone() is true or when getType is kRect_Type. 48 */ 49 virtual GrPathFill getPathFill() const = 0; 50 51 /** 52 * Return the current rect. It is an error to call this when isDone is true 53 * or when getType() is kPath_Type. 54 */ 55 virtual void getRect(GrRect* rect) const = 0; 56 57 /** 58 * Gets the operation used to apply the current item to previously iterated 59 * items. Iterators should not produce a Replace op. 60 */ 61 virtual GrSetOp getOp() const = 0; 62 63 /** 64 * Call to move to the next element in the list, previous path iter can be 65 * made invalid. 66 */ 67 virtual void next() = 0; 68 }; 69 70 /** 71 * Call to rewind iter, first checking to see if iter is NULL 72 */ GrSafeRewind(GrClipIterator * iter)73static inline void GrSafeRewind(GrClipIterator* iter) { 74 if (iter) { 75 iter->rewind(); 76 } 77 } 78 79 #endif 80 81