Equalizer  1.2.1
eqAsync.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_H
00031 #define EQASYNC_ASYNC_H
00032 
00033 #include "asyncFetcher.h"
00034 
00035 #include <eq/eq.h>
00036 
00037 namespace eqAsync
00038 {
00039 
00040 /* Simple Channel class */
00041 class Channel : public eq::Channel
00042 {
00043 public:
00044     Channel( eq::Window* parent ) : eq::Channel( parent ) {}
00045 
00046 protected:
00047     virtual void frameDraw( const eq::uint128_t& spin );
00048 };
00049 
00050 
00051 /* Simple Window class that will call init of the pipe to create a shared
00052    context */
00053 class Window : public eq::Window
00054 {
00055 public:
00056     Window( eq::Pipe* parent ) : eq::Window( parent ) {}
00057     bool configInitGL( const eq::uint128_t& initID );
00058 };
00059 
00060 
00061 /* Simple Pipe class that creates a shared window for async fetching */
00062 class Pipe : public eq::Pipe
00063 {
00064 public:
00065     Pipe( eq::Node* parent )
00066             : eq::Pipe( parent ), _initialized( false ), _txId( 0 ) {}
00067 
00068     void startAsyncFetcher( Window* wnd );
00069     AsyncFetcher& getAsyncFetcher() { return _asyncFetcher; }
00070     GLuint getTextureId() const { return _txId.id; }
00071 
00072 protected:
00073     /* checks if new textures are avaliable */
00074     virtual void frameStart( const eq::uint128_t& frameID, 
00075                              const uint32_t frameNumber );
00076     virtual bool configExit();
00077 
00078 private:
00079     bool         _initialized;
00080     AsyncFetcher _asyncFetcher;
00081     TextureId    _txId;
00082 };
00083 
00084 }
00085 
00086 #endif // EQASYNC_ASYNC_H
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