Fix wild access to font structures when rendering non-ascii unicode characters.

Sources/Plasma/PubUtilLib/plGImage/plFont.cpp

@@ -288,7 +288,16 @@ void	plFont::IRenderString( plMipmap *mip, UInt16 x, UInt16 y, const wchar_t *st
 
 	if( justCalc )
 	{
-		plCharacter &ch = fCharacters[ (UInt16)string[ 0 ] - fFirstChar ];
+		UInt16 ixFC = (UInt16)L' ' - fFirstChar;
+		if (fCharacters.Count() <= ((UInt16)string[0] - fFirstChar)) {
+			UInt16 w = wctob((UInt16)string[0]);
+			if ((w != EOF) && (fCharacters.Count() > (w - fFirstChar)))
+				ixFC = w - fFirstChar;
+		} else {
+			ixFC = (UInt16)string[0] - fFirstChar;
+		}
+
+		plCharacter &ch = fCharacters[ixFC];
 		fRenderInfo.fX = fRenderInfo.fFarthestX = x - (Int16)ch.fLeftKern;
 		if( fRenderInfo.fX < 0 )
 			fRenderInfo.fX = 0;
@@ -387,7 +396,16 @@ void	plFont::IRenderString( plMipmap *mip, UInt16 x, UInt16 y, const wchar_t *st
 		// Just calculating, no wrapping, so the max is as far as we can go
 		// Note: 32767 isn't quite right, since we'll be adding the left kern in before we
 		// calc the first character, so adjust so we make sure we don't underflow
-		plCharacter &ch = fCharacters[ (UInt16)(UInt8)string[ 0 ] - fFirstChar ];
+		UInt16 ixFC = (UInt16)L' ' - fFirstChar;
+		if (fCharacters.Count() <= ((UInt16)string[0] - fFirstChar)) {
+			UInt16 w = wctob((UInt16)string[0]);
+			if ((w != EOF) && (fCharacters.Count() > (w - fFirstChar)))
+				ixFC = w - fFirstChar;
+		} else {
+			ixFC = (UInt16)string[0] - fFirstChar;
+		}
+
+		plCharacter &ch = fCharacters[ixFC];
 
 		fRenderInfo.fMaxHeight = (Int16)fMaxCharHeight;
 		fRenderInfo.fMaxWidth = (Int16)32767 + (Int16)ch.fLeftKern;
@@ -451,11 +469,16 @@ void	plFont::IRenderString( plMipmap *mip, UInt16 x, UInt16 y, const wchar_t *st
 				}
 				
 				// handle invalid chars discretely
-				plCharacter* charToDraw = NULL;
-				if (fCharacters.Count() <= ((UInt16)string[i] - fFirstChar))
-					charToDraw = &(fCharacters[(UInt16)L' ' - fFirstChar]);
-				else
-					charToDraw = &(fCharacters[(UInt16)string[i] - fFirstChar]);
+				UInt16 ixFC = (UInt16)L' ' - fFirstChar;
+				if (fCharacters.Count() <= ((UInt16)string[i] - fFirstChar)) {
+					UInt16 w = wctob((UInt16)string[i]);
+					if ((w != EOF) && (fCharacters.Count() > (w - fFirstChar)))
+						ixFC = w - fFirstChar;
+				} else {
+					ixFC = (UInt16)string[i] - fFirstChar;
+				}
+		
+				plCharacter* charToDraw = &(fCharacters[ixFC]);
 
 				Int16 leftKern = (Int16)charToDraw->fLeftKern;
 				if( fRenderInfo.fFlags & kRenderScaleAA )
@@ -585,7 +608,16 @@ void	plFont::IRenderString( plMipmap *mip, UInt16 x, UInt16 y, const wchar_t *st
 				{
 					Int16 baseX = fRenderInfo.fX;
 	
-					plCharacter &ch = fCharacters[ (UInt16)string[ 0 ] - fFirstChar ];
+					UInt16 ixFC = (UInt16)L' ' - fFirstChar;
+					if (fCharacters.Count() <= ((UInt16)string[0] - fFirstChar)) {
+						UInt16 w = wctob((UInt16)string[0]);
+						if ((w != EOF) && (fCharacters.Count() > (w - fFirstChar)))
+							ixFC = w - fFirstChar;
+					} else {
+						ixFC = (UInt16)string[0] - fFirstChar;
+					}
+			
+					plCharacter &ch = fCharacters[ixFC];
 
 					fRenderInfo.fX -= (Int16)ch.fLeftKern;
 					fRenderInfo.fDestPtr -= (Int16)ch.fLeftKern * fRenderInfo.fDestBPP;