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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkStippleMaskFilter.h"
#include "SkString.h"
bool SkStippleMaskFilter::filterMask(SkMask* dst,
const SkMask& src,
const SkMatrix& matrix,
SkIPoint* margin) const {
if (src.fFormat != SkMask::kA8_Format) {
return false;
}
dst->fBounds = src.fBounds;
dst->fRowBytes = dst->fBounds.width();
dst->fFormat = SkMask::kA8_Format;
dst->fImage = NULL;
if (NULL != src.fImage) {
size_t dstSize = dst->computeImageSize();
if (0 == dstSize) {
return false; // too big to allocate, abort
}
dst->fImage = SkMask::AllocImage(dstSize);
uint8_t* srcScanLine = src.fImage;
uint8_t* scanline = dst->fImage;
for (int y = 0; y < src.fBounds.height(); ++y) {
for (int x = 0; x < src.fBounds.width(); ++x) {
scanline[x] = srcScanLine[x] && ((x+y) & 0x1) ? 0xFF : 0x00;
}
scanline += dst->fRowBytes;
srcScanLine += src.fRowBytes;
}
}
return true;
}
#ifdef SK_DEVELOPER
void SkStippleMaskFilter::toString(SkString* str) const {
str->append("SkStippleMaskFilter: ()");
}
#endif
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