Pararena2/Sources/Environ.c

//============================================================
//============================================================
//==														==
//==				Environ-Checking Routines				==
//==														==
//============================================================
//============================================================


//========================================================  Includes  

#include "Globals.h"
#include "UnivUtilities.h"
#include "Environ.h"


//========================================================  Functions  
//========================================================  TrapExists  

Boolean TrapExists (short trapNumber)

{
	return ((NGetTrapAddress(trapNumber, ToolTrap) !=
		NGetTrapAddress(kUnimpTrap, ToolTrap)));
		
}


//========================================================  DoWeHaveGestalt  

Boolean DoWeHaveGestalt (void)

{
	return (TrapExists(kGestaltTrap));
}


//========================================================  DoWeHaveWNE  

Boolean DoWeHaveWNE (void)

{
	return (TrapExists(kWNETrap));
}


//========================================================  DoWeHaveColor  

Boolean DoWeHaveColor (void)

{
	SysEnvRec		thisWorld;
	
	SysEnvirons(2, &thisWorld);
	return (thisWorld.hasColorQD);
}


//========================================================  DoWeHaveSystem602  

Boolean DoWeHaveSystem602 (void)

{
	SysEnvRec		thisWorld;
	Boolean			haveIt;
	
	SysEnvirons(2, &thisWorld);
	if (thisWorld.systemVersion >= 0x0602)
		haveIt = TRUE;
	else
		haveIt = FALSE;
	return (haveIt);
}


//========================================================  DoWeHaveSystem605  

Boolean DoWeHaveSystem605 (void)

{
	SysEnvRec		thisWorld;
	Boolean			haveIt;
	
	SysEnvirons(2, &thisWorld);
	if (thisWorld.systemVersion >= 0x0605)
		haveIt = TRUE;
	else
		haveIt = FALSE;
	return (haveIt);
}


//========================================================  DoWeHaveSystem7  

Boolean DoWeHaveSystem7 (void)

{
	SysEnvRec		thisWorld;
	Boolean			haveIt;
	
	SysEnvirons(2, &thisWorld);
	if (thisWorld.systemVersion >= 0x0700)
		haveIt = TRUE;
	else
		haveIt = FALSE;
	return (haveIt);
}


//========================================================  HowWillWeDisplay  

short HowWillWeDisplay (Boolean commandKeyHeld)

{
	short			displayAs, isWide, isTall;
	
	isWide = screenBits.bounds.right - screenBits.bounds.left;
	isTall = screenBits.bounds.bottom - screenBits.bounds.top;
	
	if (commandKeyHeld)
	{
		if ((isWide >= 512) && (isTall >= 384) && isColor)
			displayAs = kDisplay12Inch;
		else
			displayAs = kDisplay9Inch;
	}
	else
	{
		if ((isWide >= 640) && (isTall >= 480))
			displayAs = kDisplay13Inch;
		else
		{
			if ((isWide >= 512) && (isTall >= 384) && isColor)
				displayAs = kDisplay12Inch;
			else
				displayAs = kDisplay9Inch;
		}
	}
	
	return(displayAs);
}


//========================================================  WhatsOurDepth  

short WhatsOurDepth (void)

{
	GDHandle		theDevice;
	short			thisDepth;
	char			wasState;
	
	if (thisMac.hasColor)
	{
		theDevice = GetMainDevice();
		if (theDevice != kNilPointer)
		{
			wasState = HGetState((Handle)theDevice);
			HLock((Handle)theDevice);
			thisDepth = (**(**theDevice).gdPMap).pixelSize;
			HSetState((Handle)theDevice, wasState);
		}
		else
			DeathError(kErrNoDevice);
	}
	else
		thisDepth = 1;
	
	return (thisDepth);
}


//========================================================  CanWeDisplay4Bit  

Boolean CanWeDisplay4Bit (void)

{
	GDHandle		theDevice;
	short			canDepth;
	short			GDTypeFlag = 1, colorFlag = 1;
	Boolean			canDo;
	
	canDo = FALSE;
	if (thisMac.hasColor && thisMac.canSwitch)
	{
		theDevice = GetMainDevice();
		if (theDevice != kNilPointer)
		{
			HLock((Handle)theDevice);
			canDepth = HasDepth(theDevice, 4, GDTypeFlag, colorFlag);
			HUnlock((Handle)theDevice);
			if (canDepth != 0)
				canDo = TRUE;
		}
		else
			DeathError(kErrNoDevice);
	}
	
	return (canDo);
}


//========================================================  SwitchDepthOrAbort  

void SwitchDepthOrAbort (void)

{
	GDHandle		theDevice;
	AlertTHndl		alertHandle;
	Rect			ale