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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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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#ifndef GFX_PATH_H
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#define GFX_PATH_H
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#include "gfxTypes.h"
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#include "nsISupportsImpl.h"
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class gfxContext;
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struct gfxPoint;
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typedef struct cairo_path cairo_path_t;
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/**
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* Class representing a path. Can be created by copying the current path
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* of a gfxContext.
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*/
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class THEBES_API gfxPath {
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NS_INLINE_DECL_REFCOUNTING(gfxPath)
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friend class gfxContext;
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protected:
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gfxPath(cairo_path_t* aPath);
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public:
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virtual ~gfxPath();
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protected:
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cairo_path_t* mPath;
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};
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/**
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* Specialization of a path that only contains linear pieces. Can be created
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* from the existing path of a gfxContext.
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*/
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class THEBES_API gfxFlattenedPath : public gfxPath {
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friend class gfxContext;
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protected:
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gfxFlattenedPath(cairo_path_t* aPath);
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public:
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virtual ~gfxFlattenedPath();
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/**
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* Returns calculated total length of path
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*/
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gfxFloat GetLength();
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/**
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* Returns a point a certain distance along the path. Return is
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* first or last point of the path if the requested length offset
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* is outside the range for the path.
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* @param aOffset offset inpath parameter space (x=length, y=normal offset)
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* @param aAngle optional - output tangent
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*/
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gfxPoint FindPoint(gfxPoint aOffset,
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gfxFloat* aAngle = nullptr);
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};
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#endif
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