1 /* 2 * Copyright 2012 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 9 #ifndef SkMorphologyImageFilter_DEFINED 10 #define SkMorphologyImageFilter_DEFINED 11 12 #include "SkColor.h" 13 #include "SkImageFilter.h" 14 #include "SkSize.h" 15 16 class SK_API SkMorphologyImageFilter : public SkImageFilter { 17 public: 18 void computeFastBounds(const SkRect& src, SkRect* dst) const override; 19 bool onFilterBounds(const SkIRect& src, const SkMatrix& ctm, SkIRect* dst) const override; 20 21 /** 22 * All morphology procs have the same signature: src is the source buffer, dst the 23 * destination buffer, radius is the morphology radius, width and height are the bounds 24 * of the destination buffer (in pixels), and srcStride and dstStride are the 25 * number of pixels per row in each buffer. All buffers are 8888. 26 */ 27 28 typedef void (*Proc)(const SkPMColor* src, SkPMColor* dst, int radius, 29 int width, int height, int srcStride, int dstStride); 30 31 protected: 32 SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input, 33 const CropRect* cropRect); 34 bool filterImageGeneric(Proc procX, Proc procY, 35 Proxy*, const SkBitmap& src, const Context&, 36 SkBitmap* result, SkIPoint* offset) const; 37 void flatten(SkWriteBuffer&) const override; 38 #if SK_SUPPORT_GPU 39 bool canFilterImageGPU() const override { return true; } 40 bool filterImageGPUGeneric(bool dilate, Proxy* proxy, const SkBitmap& src, 41 const Context& ctm, SkBitmap* result, 42 SkIPoint* offset) const; 43 #endif 44 45 SkISize radius() const { return fRadius; } 46 47 private: 48 SkISize fRadius; 49 typedef SkImageFilter INHERITED; 50 }; 51 52 class SK_API SkDilateImageFilter : public SkMorphologyImageFilter { 53 public: 54 static SkDilateImageFilter* Create(int radiusX, int radiusY, 55 SkImageFilter* input = NULL, 56 const CropRect* cropRect = NULL) { 57 if (radiusX < 0 || radiusY < 0) { 58 return NULL; 59 } 60 return SkNEW_ARGS(SkDilateImageFilter, (radiusX, radiusY, input, cropRect)); 61 } 62 63 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, 64 SkBitmap* result, SkIPoint* offset) const override; 65 #if SK_SUPPORT_GPU 66 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context&, 67 SkBitmap* result, SkIPoint* offset) const override; 68 #endif 69 70 SK_TO_STRING_OVERRIDE() 71 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDilateImageFilter) 72 73 protected: 74 SkDilateImageFilter(int radiusX, int radiusY, SkImageFilter* input, const CropRect* cropRect) 75 : INHERITED(radiusX, radiusY, input, cropRect) {} 76 private: 77 typedef SkMorphologyImageFilter INHERITED; 78 }; 79 80 class SK_API SkErodeImageFilter : public SkMorphologyImageFilter { 81 public: 82 static SkErodeImageFilter* Create(int radiusX, int radiusY, 83 SkImageFilter* input = NULL, 84 const CropRect* cropRect = NULL) { 85 if (radiusX < 0 || radiusY < 0) { 86 return NULL; 87 } 88 return SkNEW_ARGS(SkErodeImageFilter, (radiusX, radiusY, input, cropRect)); 89 } 90 91 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, 92 SkBitmap* result, SkIPoint* offset) const override; 93 #if SK_SUPPORT_GPU 94 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context&, 95 SkBitmap* result, SkIPoint* offset) const override; 96 #endif 97 98 SK_TO_STRING_OVERRIDE() 99 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkErodeImageFilter) 100 101 protected: 102 SkErodeImageFilter(int radiusX, int radiusY, SkImageFilter* input, const CropRect* cropRect) 103 : INHERITED(radiusX, radiusY, input, cropRect) {} 104 105 private: 106 typedef SkMorphologyImageFilter INHERITED; 107 }; 108 109 #endif 110
