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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 "SkSGTransform.h"
#include "SkCanvas.h"
namespace sksg {
Matrix::Matrix(const SkMatrix& m, sk_sp<Matrix> parent)
: fParent(std::move(parent))
, fLocalMatrix(m) {
if (fParent) {
fParent->addInvalReceiver(this);
}
}
Matrix::~Matrix() {
if (fParent) {
fParent->removeInvalReceiver(this);
}
}
Node::RevalidationResult Matrix::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
fTotalMatrix = fLocalMatrix;
if (fParent) {
fParent->revalidate(ic, ctm);
fTotalMatrix.postConcat(fParent->getTotalMatrix());
}
// A free-floating matrix contributes no damage.
return { SkRect::MakeEmpty(), Damage::kBlockSelf };
}
Transform::Transform(sk_sp<RenderNode> child, sk_sp<Matrix> matrix)
: INHERITED(std::move(child))
, fMatrix(std::move(matrix)) {
fMatrix->addInvalReceiver(this);
}
Transform::~Transform() {
fMatrix->removeInvalReceiver(this);
}
void Transform::onRender(SkCanvas* canvas) const {
const auto& m = fMatrix->getTotalMatrix();
SkAutoCanvasRestore acr(canvas, !m.isIdentity());
canvas->concat(m);
this->INHERITED::onRender(canvas);
}
Node::RevalidationResult Transform::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
SkASSERT(this->hasInval());
// We don't care about matrix reval results, but we do care whether it was invalidated.
const auto localDamage = fMatrix->hasInval() ? Damage::kForceSelf : Damage::kDefault;
fMatrix->revalidate(ic, ctm);
const auto& m = fMatrix->getTotalMatrix();
auto result = this->INHERITED::onRevalidate(ic, SkMatrix::Concat(ctm, m));
m.mapRect(&result.fBounds);
result.fDamage = localDamage;
return result;
}
} // namespace sksg
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