1 /* 2 * Copyright 2013 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 #ifndef SkBicubicImageFilter_DEFINED 9 #define SkBicubicImageFilter_DEFINED 10 11 #include "SkImageFilter.h" 12 #include "SkScalar.h" 13 #include "SkSize.h" 14 #include "SkPoint.h" 15 16 /*! \class SkBicubicImageFilter 17 Bicubic resampling image filter. This filter does a 16-tap bicubic 18 filter using the given matrix. 19 */ 20 21 class SK_API SkBicubicImageFilter : public SkImageFilter { 22 public: 23 /** Construct a (scaling-only) bicubic resampling image filter. 24 @param scale How much to scale the image. 25 @param coefficients The 16 coefficients of the bicubic matrix. 26 @param input The input image filter. If NULL, the src bitmap 27 passed to filterImage() is used instead. 28 */ 29 30 SkBicubicImageFilter(const SkSize& scale, const SkScalar coefficients[16], 31 SkImageFilter* input = NULL); 32 static SkBicubicImageFilter* CreateMitchell(const SkSize& scale, SkImageFilter* input = NULL); 33 virtual ~SkBicubicImageFilter(); 34 35 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBicubicImageFilter) 36 37 protected: 38 SkBicubicImageFilter(SkFlattenableReadBuffer& buffer); 39 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; 40 41 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, 42 SkBitmap* result, SkIPoint* loc) SK_OVERRIDE; 43 44 #if SK_SUPPORT_GPU 45 virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; } 46 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm, 47 SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; 48 #endif 49 50 private: 51 SkSize fScale; 52 SkScalar fCoefficients[16]; 53 typedef SkImageFilter INHERITED; 54 }; 55 56 #endif 57
