1 2 /* 3 * Copyright 2011 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 SkDrawFilter_DEFINED 11 #define SkDrawFilter_DEFINED 12 13 #include "SkRefCnt.h" 14 15 class SkCanvas; 16 class SkPaint; 17 18 /** 19 * DEPRECATED - use SkPaintFilterCanvas instead. 20 * 21 * Right before something is being draw, filter() is called with the 22 * paint. The filter may modify the paint as it wishes, which will then be 23 * used for the actual drawing. Note: this modification only lasts for the 24 * current draw, as a temporary copy of the paint is used. 25 */ 26 class SK_API SkDrawFilter : public SkRefCnt { 27 public: 28 enum Type { 29 kPaint_Type, 30 kPoint_Type, 31 kLine_Type, 32 kBitmap_Type, 33 kRect_Type, 34 kRRect_Type, 35 kOval_Type, 36 kPath_Type, 37 kText_Type, 38 }; 39 40 enum { 41 kTypeCount = kText_Type + 1 42 }; 43 44 /** 45 * Called with the paint that will be used to draw the specified type. 46 * The implementation may modify the paint as they wish. If filter() 47 * returns false, the draw will be skipped. 48 */ 49 virtual bool filter(SkPaint*, Type) = 0; 50 51 private: 52 typedef SkRefCnt INHERITED; 53 }; 54 55 #endif 56