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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 "Sk2DPathEffect.h"
#include "SkBlitter.h"
#include "SkPath.h"
#include "SkScan.h"
class Sk2DPathEffectBlitter : public SkBlitter {
public:
Sk2DPathEffectBlitter(Sk2DPathEffect* pe, SkPath* dst)
: fPE(pe), fDst(dst) {}
virtual void blitH(int x, int y, int count) {
fPE->nextSpan(x, y, count, fDst);
}
private:
Sk2DPathEffect* fPE;
SkPath* fDst;
};
///////////////////////////////////////////////////////////////////////////////
Sk2DPathEffect::Sk2DPathEffect(const SkMatrix& mat) : fMatrix(mat) {
fMatrixIsInvertible = mat.invert(&fInverse);
}
bool Sk2DPathEffect::filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*) {
if (!fMatrixIsInvertible) {
return false;
}
Sk2DPathEffectBlitter blitter(this, dst);
SkPath tmp;
SkIRect ir;
src.transform(fInverse, &tmp);
tmp.getBounds().round(&ir);
if (!ir.isEmpty()) {
this->begin(ir, dst);
SkScan::FillPath(tmp, ir, &blitter);
this->end(dst);
}
return true;
}
void Sk2DPathEffect::nextSpan(int x, int y, int count, SkPath* path) {
if (!fMatrixIsInvertible) {
return;
}
const SkMatrix& mat = this->getMatrix();
SkPoint src, dst;
src.set(SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf);
do {
mat.mapPoints(&dst, &src, 1);
this->next(dst, x++, y, path);
src.fX += SK_Scalar1;
} while (--count > 0);
}
void Sk2DPathEffect::begin(const SkIRect& uvBounds, SkPath* dst) {}
void Sk2DPathEffect::next(const SkPoint& loc, int u, int v, SkPath* dst) {}
void Sk2DPathEffect::end(SkPath* dst) {}
///////////////////////////////////////////////////////////////////////////////
void Sk2DPathEffect::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
char storage[SkMatrix::kMaxFlattenSize];
uint32_t size = fMatrix.flatten(storage);
buffer.write32(size);
buffer.write(storage, size);
}
Sk2DPathEffect::Sk2DPathEffect(SkFlattenableReadBuffer& buffer) {
char storage[SkMatrix::kMaxFlattenSize];
uint32_t size = buffer.readS32();
SkASSERT(size <= sizeof(storage));
buffer.read(storage, size);
fMatrix.unflatten(storage);
fMatrixIsInvertible = fMatrix.invert(&fInverse);
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
SkPath2DPathEffect::SkPath2DPathEffect(const SkMatrix& m, const SkPath& p)
: INHERITED(m), fPath(p) {
}
SkPath2DPathEffect::SkPath2DPathEffect(SkFlattenableReadBuffer& buffer)
: INHERITED(buffer) {
buffer.readPath(&fPath);
}
void SkPath2DPathEffect::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writePath(fPath);
}
void SkPath2DPathEffect::next(const SkPoint& loc, int u, int v, SkPath* dst) {
dst->addPath(fPath, loc.fX, loc.fY);
}
///////////////////////////////////////////////////////////////////////////////
SK_DEFINE_FLATTENABLE_REGISTRAR(SkPath2DPathEffect)
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