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GameHelper.cpp

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//*** GameHelper.cpp ***

#include "GameHelper.h"

#include "Platform_OS.h"
#include "Screen.h"
#include "ColorHelper.h"
#include "Bitmap.h"

#include "AudioFormat_OGG.h"
#include "AudioFormat_YM.h"
#include "AudioFormat_MOD.h"
#include "ImageFormat_TGA.h"
#include "ImageFormat_GIF.h"
#include "ImageFormat_JPG.h"
#include "ImageFormat_PNG.h"


//*** Constructor ***

GameHelper::GameHelper(const char* applicationName)
   {
   // Set the window/application title
   if (Platform::GetPlatform_OS())
      {
      Platform::GetPlatform_OS()->SetApplicationName(applicationName);
      }

   // Register the sound formats we will be using - better register all of them, as we want this game to be easy to 
   // mod, and we don't know which formats the modders will want to use
   AudioFormat_OGG::Register();
   AudioFormat_YM::Register();
   AudioFormat_MOD::Register();

   // Register the image formats we will be using - better register all of them, as we want this game to be easy to 
   // mod, and we don't know which formats the modders will want to use
   ImageFormat_TGA::Register();
   ImageFormat_GIF::Register();
   ImageFormat_JPG::Register();
   ImageFormat_PNG::Register();
   }


//*** Destructor ***

GameHelper::~GameHelper()
   {
   gameStateManager_.ExitCurrentState();
   }


//*** UpdateGame ***

bool GameHelper::UpdateGame(float deltaTime, Screen& screen)
   {
   // Update systems
   inputManager_.Update();
   musicManager_.Update(deltaTime);
   audio_.Update();
   gameStateManager_.Update(deltaTime);
   spriteControllerManager_.Update(deltaTime);
   spriteSystem_.Update(deltaTime);
   spriteSystem_.Render(screen.GetBackBuffer());

   // Toggle between fullscreen and windowed mode on Alt+Enter
   if (inputManager_.IsKeyDown(KEY_MENU) && inputManager_.WasKeyPressed(KEY_RETURN))
      {
      screen.SetFullscreen(!screen.GetFullscreen());
      inputManager_.RestoreCursor();
      }

   // Handle screen fade when transitioning between game states
   unsigned short screenModulate=0xffff;
   if (gameStateManager_.IsTransitioningIn())
      {
      float c=gameStateManager_.GetTransitionValue();
      screenModulate=FLOATTORGB16(c,c,c);
      }
   else if (gameStateManager_.IsTransitioningOut())
      {
      float c=1-gameStateManager_.GetTransitionValue();
      screenModulate=FLOATTORGB16(c,c,c);
      }
   if (screenModulate==0)
      {
      screen.GetBackBuffer().Clear();
      }

   // Surround screen with a one pixel black border - makes it look a bit nicer when it is scaled up
   int w=screen.GetBackBuffer().GetWidth()-1;
   int h=screen.GetBackBuffer().GetHeight()-1;
   screen.GetBackBuffer().Fill(0,0,w,0,0x0);
   screen.GetBackBuffer().Fill(0,h,w,h,0x0);
   screen.GetBackBuffer().Fill(0,0,0,h,0x0);
   screen.GetBackBuffer().Fill(w,0,w,h,0x0);

   // Show the screen buffer, modifying its content for the state transition fading
   screen.Present(screenModulate);

   // Give some time to the OS. If we didn't, things like moving the window around would feel quite sluggish.
   if (Platform::GetPlatform_OS())
      {
      Platform::GetPlatform_OS()->OsYield();
      }

   // Check if exit was requested on OS level (the main window was closed or Alt+F4 pressed)
   if (Platform::GetPlatform_OS() && Platform::GetPlatform_OS()->ExitRequested())
      {
      // If so, tell game to exit
      gameStateManager_.ExitApplication();
      }

   return !gameStateManager_.IsExitFlagSet();
   }

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