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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.
*/
#ifndef SkSGTransform_DEFINED
#define SkSGTransform_DEFINED
#include "SkSGEffectNode.h"
#include "SkMatrix.h"
namespace sksg {
/**
* Concrete node, wrapping an SkMatrix, with an optional parent Matrix (to allow chaining):
*
* M' = parent x M
*/
class Matrix : public Node {
public:
static sk_sp<Matrix> Make(const SkMatrix& m, sk_sp<Matrix> parent = nullptr) {
return sk_sp<Matrix>(new Matrix(m, std::move(parent)));
}
~Matrix() override;
SG_ATTRIBUTE(Matrix, SkMatrix, fLocalMatrix)
const SkMatrix& getTotalMatrix() const { return fTotalMatrix; }
protected:
Matrix(const SkMatrix&, sk_sp<Matrix>);
SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
private:
sk_sp<Matrix> fParent;
SkMatrix fLocalMatrix,
fTotalMatrix; // cached during revalidation
typedef Node INHERITED;
};
/**
* Concrete Effect node, binding a Matrix to a RenderNode.
*/
class Transform final : public EffectNode {
public:
static sk_sp<Transform> Make(sk_sp<RenderNode> child, sk_sp<Matrix> matrix) {
return child && matrix
? sk_sp<Transform>(new Transform(std::move(child), std::move(matrix)))
: nullptr;
}
static sk_sp<Transform> Make(sk_sp<RenderNode> child, const SkMatrix& m) {
return Make(std::move(child), Matrix::Make(m));
}
~Transform() override;
const sk_sp<Matrix>& getMatrix() const { return fMatrix; }
protected:
void onRender(SkCanvas*) const override;
SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
private:
Transform(sk_sp<RenderNode>, sk_sp<Matrix>);
const sk_sp<Matrix> fMatrix;
typedef EffectNode INHERITED;
};
} // namespace sksg
#endif // SkSGTransform_DEFINED
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