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 #include "SkOffsetImageFilter.h" 9 #include "SkBitmap.h" 10 #include "SkMatrix.h" 11 #include "SkFlattenableBuffers.h" 12 13 bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source, 14 const SkMatrix& matrix, 15 SkBitmap* result, 16 SkIPoint* loc) { 17 SkBitmap src = source; 18 if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) { 19 return false; 20 } 21 22 SkVector vec; 23 matrix.mapVectors(&vec, &fOffset, 1); 24 25 loc->fX += SkScalarRoundToInt(vec.fX); 26 loc->fY += SkScalarRoundToInt(vec.fY); 27 *result = src; 28 return true; 29 } 30 31 bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, 32 SkIRect* dst) { 33 SkVector vec; 34 ctm.mapVectors(&vec, &fOffset, 1); 35 36 *dst = src; 37 dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY)); 38 return true; 39 } 40 41 void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { 42 this->INHERITED::flatten(buffer); 43 buffer.writePoint(fOffset); 44 } 45 46 SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy, 47 SkImageFilter* input) : INHERITED(input) { 48 fOffset.set(dx, dy); 49 } 50 51 SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { 52 buffer.readPoint(&fOffset); 53 } 54
