Clamp gamma value to valid range to prevent crashes/invalid calculations

Generals/Code/GameEngine/Source/Common/GlobalData.cpp

@@ -1198,6 +1198,13 @@ void GlobalData::parseGameDataDefinition( INI* ini )
 	TheWritableGlobalData->m_showMoneyPerMinute = optionPref.getShowMoneyPerMinute();
 
 	Int val=optionPref.getGammaValue();
+
+	// Clamp val to valid range to prevent division by zero or invalid calculations
+	if (val < 0)
+		val = 0;
+	if (val > 100)
+		val = 100;
+
 	//generate a value between 0.6 and 2.0.
 	if (val < 50)
 	{	//darker gamma

Generals/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/OptionsMenu.cpp

@@ -820,6 +820,13 @@ Real OptionPreferences::getGammaValue(void)
  		return 50.0f;
 
  	Real gamma = (Real) atoi(it->second.str());
+
+ 	// Clamp gamma value to valid range to prevent crashes from corrupted Options.ini
+ 	if (gamma < 0.0f)
+ 		gamma = 0.0f;
+ 	if (gamma > 100.0f)
+ 		gamma = 100.0f;
+
  	return gamma;
 }
 

GeneralsMD/Code/GameEngine/Source/Common/GlobalData.cpp

@@ -1236,6 +1236,13 @@ void GlobalData::parseGameDataDefinition( INI* ini )
 	TheWritableGlobalData->m_showMoneyPerMinute = optionPref.getShowMoneyPerMinute();
 
 	Int val=optionPref.getGammaValue();
+
+	// Clamp val to valid range to prevent division by zero or invalid calculations
+	if (val < 0)
+		val = 0;
+	if (val > 100)
+		val = 100;
+
 	//generate a value between 0.6 and 2.0.
 	if (val < 50)
 	{	//darker gamma

GeneralsMD/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/OptionsMenu.cpp

@@ -865,6 +865,13 @@ Real OptionPreferences::getGammaValue(void)
  		return 50.0f;
 
  	Real gamma = (Real) atoi(it->second.str());
+
+ 	// Clamp gamma value to valid range to prevent crashes from corrupted Options.ini
+ 	if (gamma < 0.0f)
+ 		gamma = 0.0f;
+ 	if (gamma > 100.0f)
+ 		gamma = 100.0f;
+
  	return gamma;
 }