SkBicubicImageFilter.h revision 4cb543d6057b692e1099e9f115155f0bf323a0c8
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 virtual ~SkBicubicImageFilter(); 24 25 static SkBicubicImageFilter* CreateMitchell(const SkSize& scale, SkImageFilter* input = NULL); 26 27 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBicubicImageFilter) 28 29protected: 30 /** Construct a (scaling-only) bicubic resampling image filter. 31 @param scale How much to scale the image. 32 @param coefficients The 16 coefficients of the bicubic matrix. 33 @param input The input image filter. If NULL, the src bitmap 34 passed to filterImage() is used instead. 35 */ 36 SkBicubicImageFilter(const SkSize& scale, const SkScalar coefficients[16], 37 SkImageFilter* input = NULL); 38 SkBicubicImageFilter(SkReadBuffer& buffer); 39 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; 40 41 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, 42 SkBitmap* result, SkIPoint* loc) const 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 Context& ctx, 47 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE; 48#endif 49 50private: 51 SkSize fScale; 52 SkScalar fCoefficients[16]; 53 typedef SkImageFilter INHERITED; 54}; 55 56#endif 57