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c44ff5af9a
Because of the way the canvas 2D implementation juggles between path builders and paths, we have to keep track of current and first points in the path, in case a builder is created out of it. Differential Revision: https://phabricator.services.mozilla.com/D33757 --HG-- extra : source : c79b3af2395894b449731fccdd9eb006b4d0189e
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "2D.h"
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#include <vector>
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namespace mozilla {
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namespace gfx {
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struct FlatPathOp {
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enum OpType {
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OP_MOVETO,
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OP_LINETO,
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};
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OpType mType;
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Point mPoint;
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};
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class FlattenedPath : public PathSink {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(FlattenedPath, override)
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FlattenedPath() : mCachedLength(0), mCalculatedLength(false) {}
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virtual void MoveTo(const Point& aPoint) override;
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virtual void LineTo(const Point& aPoint) override;
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virtual void BezierTo(const Point& aCP1, const Point& aCP2,
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const Point& aCP3) override;
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virtual void QuadraticBezierTo(const Point& aCP1, const Point& aCP2) override;
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virtual void Close() override;
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virtual void Arc(const Point& aOrigin, float aRadius, float aStartAngle,
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float aEndAngle, bool aAntiClockwise = false) override;
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virtual Point CurrentPoint() const override {
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return mPathOps.empty() ? Point() : mPathOps[mPathOps.size() - 1].mPoint;
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}
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Float ComputeLength();
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Point ComputePointAtLength(Float aLength, Point* aTangent);
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private:
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Float mCachedLength;
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bool mCalculatedLength;
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std::vector<FlatPathOp> mPathOps;
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};
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} // namespace gfx
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} // namespace mozilla
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