79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
// Filename: materialPool.h
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// Created by: drose (30Apr01)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#ifndef MATERIALPOOL_H
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#define MATERIALPOOL_H
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#include "pandabase.h"
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#include "material.h"
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#include "pointerTo.h"
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#include "pmutex.h"
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#include "pset.h"
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////////////////////////////////////////////////////////////////////
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// Class : MaterialPool
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// Description : The MaterialPool (there is only one in the universe)
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// serves to unify different pointers to the same
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// Material, so we do not (a) waste memory with many
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// different Material objects that are all equivalent,
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// and (b) waste time switching the graphics engine
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// between different Material states that are really the
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// same thing.
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//
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// The idea is to create a temporary Material
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// representing the lighting state you want to apply,
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// then call get_material(), passing in your temporary
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// Material. The return value will either be a new
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// Material object, or it may be the the same object you
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// supplied; in either case, it will have the same
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// value.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA MaterialPool {
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PUBLISHED:
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INLINE static Material *get_material(Material *temp);
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INLINE static int garbage_collect();
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INLINE static void list_contents(ostream &out);
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static void write(ostream &out);
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private:
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INLINE MaterialPool();
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Material *ns_get_material(Material *temp);
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int ns_garbage_collect();
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void ns_list_contents(ostream &out) const;
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static MaterialPool *get_ptr();
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static MaterialPool *_global_ptr;
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Mutex _lock;
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// We store a map of CPT(Material) to PT(Material). These are two
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// equivalent structures, but different pointers. The first pointer
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// never leaves this class. If the second pointer changes value,
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// we'll notice it and return a new one.
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typedef pmap< CPT(Material), PT(Material), indirect_compare_to<const Material *> > Materials;
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Materials _materials;
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};
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#include "materialPool.I"
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#endif
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