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Diffstat (limited to 'gfx/2d/PathAnalysis.h')
-rw-r--r-- | gfx/2d/PathAnalysis.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gfx/2d/PathAnalysis.h b/gfx/2d/PathAnalysis.h new file mode 100644 index 0000000000..f162d96213 --- /dev/null +++ b/gfx/2d/PathAnalysis.h @@ -0,0 +1,53 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "2D.h" +#include <vector> + +namespace mozilla { +namespace gfx { + +struct FlatPathOp { + enum OpType { + OP_MOVETO, + OP_LINETO, + }; + + OpType mType; + Point mPoint; +}; + +class FlattenedPath : public PathSink { + public: + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(FlattenedPath, override) + + FlattenedPath() : mCachedLength(0), mCalculatedLength(false) {} + + virtual void MoveTo(const Point& aPoint) override; + virtual void LineTo(const Point& aPoint) override; + virtual void BezierTo(const Point& aCP1, const Point& aCP2, + const Point& aCP3) override; + virtual void QuadraticBezierTo(const Point& aCP1, const Point& aCP2) override; + virtual void Close() override; + virtual void Arc(const Point& aOrigin, float aRadius, float aStartAngle, + float aEndAngle, bool aAntiClockwise = false) override; + + virtual Point CurrentPoint() const override { + return mPathOps.empty() ? Point() : mPathOps[mPathOps.size() - 1].mPoint; + } + + Float ComputeLength(); + Point ComputePointAtLength(Float aLength, Point* aTangent); + + private: + Float mCachedLength; + bool mCalculatedLength; + + std::vector<FlatPathOp> mPathOps; +}; + +} // namespace gfx +} // namespace mozilla |