SkBicubicImageFilter.h revision 377c14a1e648f4427bd11474fad8ac264d98aff2
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 21class SK_API SkBicubicImageFilter : public SkImageFilter { 22public: 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], SkImageFilter* input = NULL); 31 static SkBicubicImageFilter* CreateMitchell(const SkSize& scale, SkImageFilter* input = NULL); 32 virtual ~SkBicubicImageFilter(); 33 34 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBicubicImageFilter) 35 36protected: 37 SkBicubicImageFilter(SkFlattenableReadBuffer& buffer); 38 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; 39 40 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, 41 SkBitmap* result, SkIPoint* loc) SK_OVERRIDE; 42 43#if SK_SUPPORT_GPU 44 virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; } 45 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result) SK_OVERRIDE; 46#endif 47 48private: 49 SkSize fScale; 50 SkScalar fCoefficients[16]; 51 typedef SkImageFilter INHERITED; 52}; 53 54#endif 55