gecko/gfx/thebes/public/gfxPath.h

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3.0 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is IBM Corporation code.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef GFX_PATH_H
#define GFX_PATH_H
#include "gfxTypes.h"
class gfxContext;
struct gfxPoint;
typedef struct cairo_path cairo_path_t;
/**
* Class representing a path. Can be created by copying the current path
* of a gfxContext.
*/
class THEBES_API gfxPath {
THEBES_INLINE_DECL_REFCOUNTING(gfxPath)
friend class gfxContext;
protected:
gfxPath(cairo_path_t* aPath);
public:
virtual ~gfxPath();
protected:
cairo_path_t* mPath;
};
/**
* Specialization of a path that only contains linear pieces. Can be created
* from the existing path of a gfxContext.
*/
class THEBES_API gfxFlattenedPath : public gfxPath {
friend class gfxContext;
protected:
gfxFlattenedPath(cairo_path_t* aPath);
public:
virtual ~gfxFlattenedPath();
/**
* Returns calculated total length of path
*/
gfxFloat GetLength();
/**
* Returns a point a certain distance along the path. Return is
* first or last point of the path if the requested length offset
* is outside the range for the path.
* @param aOffset offset inpath parameter space (x=length, y=normal offset)
* @param aAngle optional - output tangent
*/
gfxPoint FindPoint(gfxPoint aOffset,
gfxFloat* aAngle = nsnull);
};
#endif