Equalizer  1.2.1
asyncFetcher.h
00001 
00002 /* Copyright (c) 2009-2011, Maxim Makhinya <maxmah@gmail.com>
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions are met:
00006  *
00007  * - Redistributions of source code must retain the above copyright notice, this
00008  *   list of conditions and the following disclaimer.
00009  * - Redistributions in binary form must reproduce the above copyright notice,
00010  *   this list of conditions and the following disclaimer in the documentation
00011  *   and/or other materials provided with the distribution.
00012  * - Neither the name of Eyescale Software GmbH nor the names of its
00013  *   contributors may be used to endorse or promote products derived from this
00014  *   software without specific prior written permission.
00015  *
00016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00017  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00018  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00019  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
00020  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00021  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00022  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00023  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00024  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00025  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00026  * POSSIBILITY OF SUCH DAMAGE.
00027  *
00028  */
00029 
00030 #ifndef EQASYNC_ASYNC_FETCHER_H
00031 #define EQASYNC_ASYNC_FETCHER_H
00032 
00033 #include <eq/eq.h>
00034 
00035 namespace eqAsync
00036 {
00037 
00041 struct TextureId
00042 {
00043     TextureId( const GLuint id_ = 0, const void* key_ = 0 )
00044             : id( id_ ), key( key_ ){};
00045 
00046     GLuint id;       // OpenGL texture id
00047     const void* key; // Object manager key; used to delete textures
00048 };
00049 
00050 class Window;
00051 
00055 class AsyncFetcher : public co::base::Thread
00056 {
00057 public:
00058     typedef eq::util::ObjectManager< int > ObjectManager;
00059 
00060     AsyncFetcher();
00061     ~AsyncFetcher();
00062 
00063     virtual void run();
00064     void setup( Window* wnd ) { _wnd = wnd; }
00065 
00066     TextureId getTextureId()               { return _outQueue.pop().id;      }
00067     bool tryGetTextureId( TextureId& val ) { return _outQueue.tryPop( val ); }
00068     void deleteTexture( const void* key )  { _inQueue.push( key );           }
00069 
00070     const GLEWContext* glewGetContext() const;
00071 
00072 private:
00073     Window*                        _wnd;
00074     co::base::MTQueue<const void*> _inQueue;       // textures to delete
00075     co::base::MTQueue<TextureId> _outQueue;      // generated textures
00076     eq::ObjectManager*             _objectManager;
00077     eq::SystemWindow*              _sharedContextWindow;
00078     GLbyte*                        _tmpTexture;    // temporal texture storage
00079 };
00080 
00081 } 
00082 
00083 #endif //EQASYNC_ASYNC_FETCHER_H
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