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/*
* Copyright 2006 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 "SkMaskFilter.h"
#include "SkBlitter.h"
#include "SkBounder.h"
#include "SkBuffer.h"
#include "SkDraw.h"
#include "SkRasterClip.h"
SK_DEFINE_INST_COUNT(SkMaskFilter)
bool SkMaskFilter::filterMask(SkMask*, const SkMask&, const SkMatrix&,
SkIPoint*) {
return false;
}
bool SkMaskFilter::filterPath(const SkPath& devPath, const SkMatrix& matrix,
const SkRasterClip& clip, SkBounder* bounder,
SkBlitter* blitter, SkPaint::Style style) {
SkMask srcM, dstM;
if (!SkDraw::DrawToMask(devPath, &clip.getBounds(), this, &matrix, &srcM,
SkMask::kComputeBoundsAndRenderImage_CreateMode,
style)) {
return false;
}
SkAutoMaskFreeImage autoSrc(srcM.fImage);
if (!this->filterMask(&dstM, srcM, matrix, NULL)) {
return false;
}
SkAutoMaskFreeImage autoDst(dstM.fImage);
// if we get here, we need to (possibly) resolve the clip and blitter
SkAAClipBlitterWrapper wrapper(clip, blitter);
blitter = wrapper.getBlitter();
SkRegion::Cliperator clipper(wrapper.getRgn(), dstM.fBounds);
if (!clipper.done() && (bounder == NULL || bounder->doIRect(dstM.fBounds))) {
const SkIRect& cr = clipper.rect();
do {
blitter->blitMask(dstM, cr);
clipper.next();
} while (!clipper.done());
}
return true;
}
SkMaskFilter::BlurType SkMaskFilter::asABlur(BlurInfo*) const {
return kNone_BlurType;
}
void SkMaskFilter::computeFastBounds(const SkRect& src, SkRect* dst) {
SkMask srcM, dstM;
srcM.fImage = NULL;
src.roundOut(&srcM.fBounds);
srcM.fRowBytes = 0;
srcM.fFormat = SkMask::kA8_Format;
SkIPoint margin; // ignored
if (this->filterMask(&dstM, srcM, SkMatrix::I(), &margin)) {
dst->set(dstM.fBounds);
} else {
dst->set(srcM.fBounds);
}
}
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