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/*
* Copyright 2012 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkOffsetImageFilter.h"
#include "SkBitmap.h"
#include "SkMatrix.h"
#include "SkFlattenableBuffers.h"
bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
const SkMatrix& matrix,
SkBitmap* result,
SkIPoint* loc) {
SkBitmap src = source;
if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) {
return false;
}
SkVector vec;
matrix.mapVectors(&vec, &fOffset, 1);
loc->fX += SkScalarRoundToInt(vec.fX);
loc->fY += SkScalarRoundToInt(vec.fY);
*result = src;
return true;
}
bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) {
SkVector vec;
ctm.mapVectors(&vec, &fOffset, 1);
*dst = src;
dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY));
return true;
}
void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writePoint(fOffset);
}
SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy,
SkImageFilter* input) : INHERITED(input) {
fOffset.set(dx, dy);
}
SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
buffer.readPoint(&fOffset);
}
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