SBSPSS/source/system/gstate.cpp

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/*=========================================================================
gstate.cpp
Author: PKG
Created:
Project: PRLSR
Purpose:
Copyright (c) 2000 Climax Development Ltd
===========================================================================*/
#include "system\global.h"
#include "system\gstate.h"
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#ifndef __MEMORY_HEADER__
#include "mem\memory.h"
#endif
#ifndef __VID_HEADER_
#include "system\vid.h"
#endif
/*****************************************************************************/
// Use click counter or vbl counter
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//#define USE_CLICK_COUNTER
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#ifdef USE_CLICK_COUNTER
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#ifndef __SYSTEM_CLICKCOUNT_H__
#include "system\clickcount.h"
#endif
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#endif
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/*****************************************************************************/
static CScene *s_currentScene;
static CScene *s_pendingScene;
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#ifdef USE_CLICK_COUNTER
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static CClickCount s_clickCounter;
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#endif
int GameState::s_framesSinceLast=1;
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#ifdef __VERSION_DEBUG__
static int s_baseMemory=0;
static int s_baseSceneMemory=0;
#endif
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/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::initialise()
{
s_currentScene=NULL;
s_pendingScene=NULL;
}
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::think()
{
updateTimer();
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if(s_pendingScene)
{
if(s_currentScene)
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{
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if(s_currentScene->readyToShutdown())
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{
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SYSTEM_DBGMSG("GameState: Closing down scene '%s'..",s_currentScene->getSceneName());
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#ifdef __VERSION_DEBUG__
int gain;
gain=MainRam.RamUsed-s_baseSceneMemory;
if(gain)
{
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SYSTEM_DBGMSG("Scene '%s' allocated an extra %d bytes after init()",s_currentScene->getSceneName(),gain);
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}
#endif
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ASSERT(s_pendingScene); // There really should be a scene pending before you shutdown..!
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s_currentScene->shutdown();
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#ifdef __VERSION_DEBUG__
int loss;
loss=MainRam.RamUsed-s_baseMemory;
if(loss)
{
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SYSTEM_DBGMSG("MEMORY HAS CHANGED BY %d BYTES DURING SCENE '%s'!",loss,s_currentScene->getSceneName());
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ASSERT(!"MEMORY CHANGED!");
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s_baseMemory=0;
}
#endif
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s_currentScene=NULL;
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}
}
if(!s_currentScene)
{
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s_currentScene=s_pendingScene;
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#ifdef __VERSION_DEBUG__
if(s_baseMemory==0)
{
s_baseMemory=MainRam.RamUsed;
}
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SYSTEM_DBGMSG("GameState: Opening new scene '%s' ( with %d bytes used )",s_currentScene->getSceneName(),s_baseMemory);
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#endif
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s_currentScene->init();
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#ifdef __VERSION_DEBUG__
s_baseSceneMemory=MainRam.RamUsed;
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SYSTEM_DBGMSG("GameState: Scene '%s' has used %d bytes during init()",s_currentScene->getSceneName(),s_baseSceneMemory-s_baseMemory);
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#endif
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s_pendingScene=NULL;
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}
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}
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ASSERT(s_currentScene);
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s_currentScene->think(getFramesSinceLast());
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}
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::render()
{
ASSERT(s_currentScene);
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s_currentScene->render();
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}
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::setNextScene( CScene *_nextScene )
{
ASSERT(!s_pendingScene);
s_pendingScene=_nextScene;
}
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/*****************************************************************************/
CScene * GameState::getCurrentScene()
{
return s_currentScene;
}
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/*****************************************************************************/
CScene * GameState::getPendingScene()
{
return s_pendingScene;
}
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/*****************************************************************************/
void GameState::updateTimer()
{
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#ifdef USE_CLICK_COUNTER
s_framesSinceLast=(s_clickCounter.timeSinceLast()>>12)/4+1;
#else
s_framesSinceLast=VidGetVblsThisFrame();
#endif
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}
/*===========================================================================
end */