fab6f24f4e
the actual implemention. This has been done so that when a freetype font is created the implementation can unloaded when the freetype plugin is unloaded without breaking the main font. Also add image margin around founds to prevent any image boundaries appearing.
110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_REF_PTR
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#define OSG_REF_PTR 1
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#define AUTOMATIC_CAST_TO_POINTER
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namespace osg {
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/** Smart pointer for handling referenced counted objects.*/
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template<class T>
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class ref_ptr
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{
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public:
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ref_ptr() :_ptr(0L) {}
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ref_ptr(T* t):_ptr(t) { if (_ptr) _ptr->ref(); }
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ref_ptr(const ref_ptr& rp):_ptr(rp._ptr) { if (_ptr) _ptr->ref(); }
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~ref_ptr() { if (_ptr) _ptr->unref(); _ptr=0; }
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inline ref_ptr& operator = (const ref_ptr& rp)
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{
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if (_ptr==rp._ptr) return *this;
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T* tmp_ptr = _ptr;
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_ptr = rp._ptr;
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if (_ptr) _ptr->ref();
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// unref second to prevent any deletion of any object which might
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// be referenced by the other object. i.e rp is child of the
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// original _ptr.
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if (tmp_ptr) tmp_ptr->unref();
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return *this;
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}
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inline ref_ptr& operator = (T* ptr)
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{
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if (_ptr==ptr) return *this;
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T* tmp_ptr = _ptr;
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_ptr = ptr;
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if (_ptr) _ptr->ref();
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// unref second to prevent any deletion of any object which might
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// be referenced by the other object. i.e rp is child of the
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// original _ptr.
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if (tmp_ptr) tmp_ptr->unref();
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return *this;
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}
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#ifndef AUTOMATIC_CAST_TO_POINTER
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// comparison operators for ref_ptr.
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inline bool operator == (const ref_ptr& rp) const { return (_ptr==rp._ptr); }
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inline bool operator != (const ref_ptr& rp) const { return (_ptr!=rp._ptr); }
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inline bool operator < (const ref_ptr& rp) const { return (_ptr<rp._ptr); }
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inline bool operator > (const ref_ptr& rp) const { return (_ptr>rp._ptr); }
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#endif
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// comparion operator for const T*.
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inline bool operator == (const T* ptr) const { return (_ptr==ptr); }
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inline bool operator != (const T* ptr) const { return (_ptr!=ptr); }
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inline bool operator < (const T* ptr) const { return (_ptr<ptr); }
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inline bool operator > (const T* ptr) const { return (_ptr>ptr); }
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inline T& operator*() { return *_ptr; }
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inline const T& operator*() const { return *_ptr; }
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inline T* operator->() { return _ptr; }
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inline const T* operator->() const { return _ptr; }
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inline bool operator!() const { return _ptr==0L; }
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inline bool valid() const { return _ptr!=0L; }
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inline T* get() { return _ptr; }
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inline const T* get() const { return _ptr; }
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#ifdef AUTOMATIC_CAST_TO_POINTER
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inline operator T* () { return _ptr; }
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inline operator const T* () const { return _ptr; }
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#endif
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/** take control over the object pointed to by ref_ptr, unreference but do not delete even if ref count goes to 0,
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* return the pointer to the object.
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* Note, do not use this unless you are 100% sure your code handles the deletion of the object correctly, and
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* only use when absolutely required.*/
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inline T* take() { return release();}
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inline T* release() { T* tmp=_ptr; if (_ptr) _ptr->unref_nodelete(); _ptr=0; return tmp;}
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private:
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T* _ptr;
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};
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}
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#endif
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