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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSGMerge.h"
#include "SkCanvas.h"
#include "SkPathOps.h"
namespace sksg {
Merge::Merge(std::vector<Rec>&& recs)
: fRecs(std::move(recs)) {
for (const auto& rec : fRecs) {
this->observeInval(rec.fGeo);
}
}
Merge::~Merge() {
for (const auto& rec : fRecs) {
this->unobserveInval(rec.fGeo);
}
}
void Merge::onClip(SkCanvas* canvas, bool antiAlias) const {
canvas->clipPath(fMerged, SkClipOp::kIntersect, antiAlias);
}
void Merge::onDraw(SkCanvas* canvas, const SkPaint& paint) const {
canvas->drawPath(fMerged, paint);
}
SkPath Merge::onAsPath() const {
return fMerged;
}
static SkPathOp mode_to_op(Merge::Mode mode) {
switch (mode) {
case Merge::Mode::kUnion:
return kUnion_SkPathOp;
case Merge::Mode::kIntersect:
return kIntersect_SkPathOp;
case Merge::Mode::kDifference:
return kDifference_SkPathOp;
case Merge::Mode::kReverseDifference:
return kReverseDifference_SkPathOp;
case Merge::Mode::kXOR:
return kXOR_SkPathOp;
default:
break;
}
return kUnion_SkPathOp;
}
SkRect Merge::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
SkASSERT(this->hasInval());
SkOpBuilder builder;
fMerged.reset();
bool in_builder = false;
for (const auto& rec : fRecs) {
rec.fGeo->revalidate(ic, ctm);
// Merge is not currently supported by SkOpBuidler.
if (rec.fMode == Mode::kMerge) {
if (in_builder) {
builder.resolve(&fMerged);
in_builder = false;
}
fMerged.addPath(rec.fGeo->asPath());
continue;
}
if (!in_builder) {
builder.add(fMerged, kUnion_SkPathOp);
in_builder = true;
}
builder.add(rec.fGeo->asPath(), mode_to_op(rec.fMode));
}
if (in_builder) {
builder.resolve(&fMerged);
}
return fMerged.computeTightBounds();
}
} // namespace sksg
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