104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
// tilecache.hxx -- routines to handle scenery tile caching
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//
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// Written by Curtis Olson, started January 1998.
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//
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// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifndef _TILECACHE_HXX
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#define _TILECACHE_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include <GL/glut.h>
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#include <XGL/xgl.h>
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#include <Bucket/newbucket.hxx>
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#include <Math/point3d.hxx>
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#include "tile.hxx"
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// For best results ... i.e. to avoid tile load problems and blank areas
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//
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// FG_TILE_CACHE_SIZE >= (o->tile_diameter + 1) ** 2
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#define FG_TILE_CACHE_SIZE 121
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// A class to store and manage a pile of tiles
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class fgTILECACHE {
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// enum
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// {
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// // For best results... i.e. to avoid tile load problems and blank areas
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// // FG_TILE_CACHE_SIZE >= (o->tile_diameter + 1) ** 2
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// FG_TILE_CACHE_SIZE = 121
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// };
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// cache storage space
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fgTILE tile_cache[ FG_TILE_CACHE_SIZE ];
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public:
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// Constructor
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fgTILECACHE( void );
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// Initialize the tile cache subsystem
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void init( void );
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// Search for the specified "bucket" in the cache
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int exists( const FGBucket& p );
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// Return index of next available slot in tile cache
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int next_avail( void );
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// Free a tile cache entry
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void entry_free( int index );
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// Fill in a tile cache entry with real data for the specified bucket
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void fill_in( int index, FGBucket& p );
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// Return a pointer to the specified tile cache entry
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fgTILE *get_tile( int index ) {
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return &tile_cache[index];
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}
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// Destructor
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~fgTILECACHE( void );
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};
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// the tile cache
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extern fgTILECACHE global_tile_cache;
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#endif // _TILECACHE_HXX
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