3 files changed, 13 insertions, 17 deletions

diff --git a/engines/sword2/maketext.cpp b/engines/sword2/maketext.cpp
index e279284d76..765ff0eaeb 100644
--- a/engines/sword2/maketext.cpp
+++ b/engines/sword2/maketext.cpp
@@ -83,7 +83,7 @@ namespace Sword2 {
  *         error-signal character (chequered flag)
  */
 
-byte *FontRenderer::makeTextSprite(byte *sentence, uint16 maxWidth, uint8 pen, uint32 fontRes, uint8 border) {
+byte *FontRenderer::makeTextSprite(const byte *sentence, uint16 maxWidth, uint8 pen, uint32 fontRes, uint8 border) {
 	debug(5, "makeTextSprite(\"%s\", maxWidth=%u)", sentence, maxWidth);
 
 	_borderPen = border;
@@ -123,7 +123,7 @@ byte *FontRenderer::makeTextSprite(byte *sentence, uint16 maxWidth, uint8 pen, u
 	return textSprite;
 }
 
-uint16 FontRenderer::analyzeSentence(byte *sentence, uint16 maxWidth, uint32 fontRes, LineInfo *line) {
+uint16 FontRenderer::analyzeSentence(const byte *sentence, uint16 maxWidth, uint32 fontRes, LineInfo *line) {
 	// joinWidth = how much extra space is needed to append a word to a
 	// line. NB. SPACE requires TWICE the '_charSpacing' to join a word
 	// to line
@@ -207,7 +207,7 @@ uint16 FontRenderer::analyzeSentence(byte *sentence, uint16 maxWidth, uint32 fon
  *         error-signal character (chequered flag)
  */
 
-byte *FontRenderer::buildTextSprite(byte *sentence, uint32 fontRes, uint8 pen, LineInfo *line, uint16 noOfLines) {
+byte *FontRenderer::buildTextSprite(const byte *sentence, uint32 fontRes, uint8 pen, LineInfo *line, uint16 noOfLines) {
 	uint16 i;
 
 	// Find the width of the widest line in the output text
diff --git a/engines/sword2/maketext.h b/engines/sword2/maketext.h
index 726c23a5f9..64024f8db3 100644
--- a/engines/sword2/maketext.h
+++ b/engines/sword2/maketext.h
@@ -91,8 +91,8 @@ private:
 				// each line - negative for overlap
 	uint8 _borderPen;	// output pen color of character borders
 
-	uint16 analyzeSentence(byte *sentence, uint16 maxWidth, uint32 fontRes, LineInfo *line);
-	byte *buildTextSprite(byte *sentence, uint32 fontRes, uint8 pen, LineInfo *line, uint16 noOfLines);
+	uint16 analyzeSentence(const byte *sentence, uint16 maxWidth, uint32 fontRes, LineInfo *line);
+	byte *buildTextSprite(const byte *sentence, uint32 fontRes, uint8 pen, LineInfo *line, uint16 noOfLines);
 	uint16 charWidth(byte ch, uint32 fontRes);
 	uint16 charHeight(uint32 fontRes);
 	byte *findChar(byte ch, byte *charSet);
@@ -109,7 +109,7 @@ public:
 			free(_blocList[i].text_mem);
 	}
 
-	byte *makeTextSprite(byte *sentence, uint16 maxWidth, uint8 pen, uint32 fontRes, uint8 border = BORDER_PEN);
+	byte *makeTextSprite(const byte *sentence, uint16 maxWidth, uint8 pen, uint32 fontRes, uint8 border = BORDER_PEN);
 
 	void killTextBloc(uint32 bloc_number);
 	void printTextBlocs();
diff --git a/engines/sword2/screen.cpp b/engines/sword2/screen.cpp
index 40baf67e46..f3363df45f 100644
--- a/engines/sword2/screen.cpp
+++ b/engines/sword2/screen.cpp
@@ -845,22 +845,18 @@ enum {
 };
 
 struct CreditsLine {
-	char *str;
+	Common::String str;
 	byte type;
 	int top;
 	int height;
 	byte *sprite;
 
 	CreditsLine() {
-		str = NULL;
 		sprite = NULL;
 	}
 
 	~CreditsLine() {
-		free(str);
 		free(sprite);
-		str = NULL;
-		sprite = NULL;
 	}
 };
 
@@ -1036,7 +1032,7 @@ void Screen::rollCredits() {
 				creditsLines[lineCount]->top = lineTop;
 				creditsLines[lineCount]->height = CREDITS_FONT_HEIGHT;
 				creditsLines[lineCount]->type = LINE_LEFT;
-				creditsLines[lineCount]->str = strdup(line);
+				creditsLines[lineCount]->str = line;
 
 				lineCount++;
 				*center_mark = '^';
@@ -1063,7 +1059,7 @@ void Screen::rollCredits() {
 			lineTop += CREDITS_LINE_SPACING;
 		}
 
-		creditsLines[lineCount]->str = strdup(line);
+		creditsLines[lineCount]->str = line;
 		lineCount++;
 	}
 
@@ -1113,7 +1109,7 @@ void Screen::rollCredits() {
 			// Free any sprites that have scrolled off the screen
 
 			if (creditsLines[i]->top + creditsLines[i]->height < scrollPos) {
-				debug(2, "Freeing line %d: '%s'", i, creditsLines[i]->str);
+				debug(2, "Freeing line %d: '%s'", i, creditsLines[i]->str.c_str());
 
 				delete creditsLines[i];
 				creditsLines[i] = NULL;
@@ -1121,8 +1117,8 @@ void Screen::rollCredits() {
 				startLine = i + 1;
 			} else if (creditsLines[i]->top < scrollPos + 400) {
 				if (!creditsLines[i]->sprite) {
-					debug(2, "Creating line %d: '%s'", i, creditsLines[i]->str);
-					creditsLines[i]->sprite = _vm->_fontRenderer->makeTextSprite((byte *)creditsLines[i]->str, 600, 14, _vm->_speechFontId, 0);
+					debug(2, "Creating line %d: '%s'", i, creditsLines[i]->str.c_str());
+					creditsLines[i]->sprite = _vm->_fontRenderer->makeTextSprite((byte *)creditsLines[i]->str.c_str(), 600, 14, _vm->_speechFontId, 0);
 				}
 
 				FrameHeader frame;
@@ -1143,7 +1139,7 @@ void Screen::rollCredits() {
 					spriteInfo.x = RENDERWIDE / 2 + 5;
 					break;
 				case LINE_CENTER:
-					if (strcmp(creditsLines[i]->str, "@") == 0) {
+					if (strcmp(creditsLines[i]->str.c_str(), "@") == 0) {
 						spriteInfo.data = logoData;
 						spriteInfo.x = (RENDERWIDE - logoWidth) / 2;
 						spriteInfo.w = logoWidth;