SkOffsetImageFilter.h revision 36352bf5e38f45a70ee4f4fc132a38048d38206d
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#ifndef SkOffsetImageFilter_DEFINED 9#define SkOffsetImageFilter_DEFINED 10 11#include "SkImageFilter.h" 12#include "SkPoint.h" 13 14class SK_API SkOffsetImageFilter : public SkImageFilter { 15 typedef SkImageFilter INHERITED; 16 17public: 18 static SkOffsetImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL, 19 const CropRect* cropRect = NULL) { 20 if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) { 21 return NULL; 22 } 23 return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect)); 24 } 25 void computeFastBounds(const SkRect& src, SkRect* dst) const override; 26 SK_TO_STRING_OVERRIDE() 27 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter) 28 29protected: 30 SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect* cropRect); 31 void flatten(SkWriteBuffer&) const override; 32 33 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, 34 SkBitmap* result, SkIPoint* loc) const override; 35 bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const override; 36 37private: 38 SkVector fOffset; 39}; 40 41#endif 42