1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SkKernel33MaskFilter_DEFINED 18 #define SkKernel33MaskFilter_DEFINED 19 20 #include "SkMaskFilter.h" 21 22 class SkKernel33ProcMaskFilter : public SkMaskFilter { 23 public: 24 SkKernel33ProcMaskFilter(unsigned percent256 = 256) fPercent256(percent256)25 : fPercent256(percent256) {} 26 27 virtual uint8_t computeValue(uint8_t* const* srcRows) = 0; 28 29 // overrides from SkMaskFilter 30 virtual SkMask::Format getFormat(); 31 virtual bool filterMask(SkMask*, const SkMask&, const SkMatrix&, SkIPoint*); 32 33 // overrides from SkFlattenable 34 virtual void flatten(SkFlattenableWriteBuffer& wb); 35 36 protected: 37 SkKernel33ProcMaskFilter(SkFlattenableReadBuffer& rb); 38 39 private: 40 int fPercent256; 41 42 typedef SkMaskFilter INHERITED; 43 }; 44 45 /////////////////////////////////////////////////////////////////////////////// 46 47 class SkKernel33MaskFilter : public SkKernel33ProcMaskFilter { 48 public: 49 SkKernel33MaskFilter(const int coeff[3][3], int shift, int percent256 = 256) SkKernel33ProcMaskFilter(percent256)50 : SkKernel33ProcMaskFilter(percent256) 51 { 52 memcpy(fKernel, coeff, 9 * sizeof(int)); 53 fShift = shift; 54 } 55 56 // override from SkKernel33ProcMaskFilter 57 virtual uint8_t computeValue(uint8_t* const* srcRows); 58 59 // overrides from SkFlattenable 60 virtual void flatten(SkFlattenableWriteBuffer& wb); 61 virtual Factory getFactory(); 62 63 private: 64 int fKernel[3][3]; 65 int fShift; 66 67 SkKernel33MaskFilter(SkFlattenableReadBuffer& rb); 68 static SkFlattenable* Create(SkFlattenableReadBuffer& rb); 69 70 typedef SkKernel33ProcMaskFilter INHERITED; 71 }; 72 73 #endif 74