Dogcows Code - chaz/yoink/blob - src/Moof/Core.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
   9
  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 *******************************************************************************/
  28
  29 #ifndef _MOOF_CORE_HH_
  30 #define _MOOF_CORE_HH_
  31
  32 #include <boost/shared_ptr.hpp>
  33
  34 #include <Moof/Dispatch.hh>
  35 #include <Moof/Error.hh>
  36 #include <Moof/Layer.hh>
  37
  38
  39 namespace Mf {
  40
  41
  42 /**
  43  * The core is essentially a stack of layers.  While running, it updates each
  44  * layer from the bottom up every timestep.  It also draws each layer from the
  45  * bottom up, adhering to the maximum frame-rate.  Events are sent to each layer
  46  * from the top down until a layer signals the event was handled.  The core is
  47  * also responsible for firing timers on time.  The core will continue running
  48  * as long as there are layers on the stack.
  49  */
  50
  51 class Core
  52 {
  53 public:
  54
  55         Core();
  56
  57         // loads settings: rngseed, timestep, framerate, showfps
  58         void init();
  59
  60         int getFps() const;
  61
  62         void push(LayerP layer);        // push a layer onto the top
  63         LayerP pop();                           // pop the top layer
  64         LayerP pop(Layer* layer);       // pops a specific layer and all layers above it
  65         void clear();                           // remove all layers (the core will stop)
  66
  67         int getSize() const;            // get the size of the stack
  68
  69         // set this machine in motion
  70         void run();
  71
  72         Dispatch::Handler addHandler(const std::string& event,
  73                         const Dispatch::Function& callback);
  74         Dispatch::Handler addHandler(const std::string& event,
  75                         const Dispatch::Function& callback, Dispatch::Handler handler);
  76
  77         void dispatch(const std::string& event,
  78                         const Dispatch::Message* message = 0);
  79
  80 private:
  81
  82         class Impl;
  83         boost::shared_ptr<Impl> mImpl;
  84 };
  85
  86 extern Core core;
  87
  88
  89 /*
  90  * Some classes and subsystems require certain backend libraries to be
  91  * initialized.  This is the mechanism to accomplish that.  Classes which rely
  92  * on any backend libraries just need to instantiate this class as a member.
  93  * Backend cleanup will occur automagically when there are no more instances.
  94  */
  95
  96 class Backend
  97 {
  98 public:
  99
 100         Backend();
 101         ~Backend();
 102
 103         static bool check(Error& error);
 104 };
 105
 106
 107 } // namespace Mf
 108
 109 #endif // _MOOF_CORE_HH_
 110
 111 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 112