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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkArcToPathEffect.h"
#include "SkPath.h"
#include "SkPoint.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
SkArcToPathEffect::SkArcToPathEffect(SkScalar radius) : fRadius(radius) {}
bool SkArcToPathEffect::filterPath(SkPath* dst, const SkPath& src,
SkStrokeRec*, const SkRect*) const {
SkPath::Iter iter(src, false);
SkPath::Verb verb;
SkPoint pts[4];
SkPoint lastCorner = { 0, 0 }; // avoid warning
SkPath::Verb prevVerb = SkPath::kMove_Verb;
for (;;) {
switch (verb = iter.next(pts, false)) {
case SkPath::kMove_Verb:
if (SkPath::kLine_Verb == prevVerb) {
dst->lineTo(lastCorner);
}
dst->moveTo(pts[0]);
break;
case SkPath::kLine_Verb:
if (prevVerb == SkPath::kLine_Verb) {
dst->arcTo(pts[0], pts[1], fRadius);
}
lastCorner = pts[1];
break;
case SkPath::kQuad_Verb:
dst->quadTo(pts[1], pts[2]);
lastCorner = pts[2];
break;
case SkPath::kConic_Verb:
dst->conicTo(pts[1], pts[2], iter.conicWeight());
lastCorner = pts[2];
break;
case SkPath::kCubic_Verb:
dst->cubicTo(pts[1], pts[2], pts[3]);
lastCorner = pts[3];
break;
case SkPath::kClose_Verb:
dst->lineTo(lastCorner);
break;
case SkPath::kDone_Verb:
dst->lineTo(lastCorner);
goto DONE;
}
prevVerb = verb;
}
DONE:
return true;
}
SkFlattenable* SkArcToPathEffect::CreateProc(SkReadBuffer& buffer) {
return SkArcToPathEffect::Create(buffer.readScalar());
}
void SkArcToPathEffect::flatten(SkWriteBuffer& buffer) const {
buffer.writeScalar(fRadius);
}
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