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-rw-r--r--gfx/2d/PathAnalysis.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/gfx/2d/PathAnalysis.h b/gfx/2d/PathAnalysis.h
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+++ b/gfx/2d/PathAnalysis.h
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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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)
+ FlattenedPath() : mCachedLength(0)
+ , mCalculatedLength(false)
+ {
+ }
+
+ virtual void MoveTo(const Point &aPoint);
+ virtual void LineTo(const Point &aPoint);
+ virtual void BezierTo(const Point &aCP1,
+ const Point &aCP2,
+ const Point &aCP3);
+ virtual void QuadraticBezierTo(const Point &aCP1,
+ const Point &aCP2);
+ virtual void Close();
+ virtual void Arc(const Point &aOrigin, float aRadius, float aStartAngle,
+ float aEndAngle, bool aAntiClockwise = false);
+
+ virtual Point CurrentPoint() const { return mPathOps.empty() ? Point() : mPathOps[mPathOps.size() - 1].mPoint; }
+
+ Float ComputeLength();
+ Point ComputePointAtLength(Float aLength, Point *aTangent);
+
+private:
+ Float mCachedLength;
+ bool mCalculatedLength;
+ Point mLastMove;
+
+ std::vector<FlatPathOp> mPathOps;
+};
+
+} // namespace gfx
+} // namespace mozilla