1 files changed, 61 insertions, 20 deletions

diff --git a/graphics/fonts/ttf.cpp b/graphics/fonts/ttf.cpp
index b9e9610d77..be3cd94efa 100644
--- a/graphics/fonts/ttf.cpp
+++ b/graphics/fonts/ttf.cpp
@@ -107,11 +107,11 @@ public:
 
 	virtual int getMaxCharWidth() const;
 
-	virtual int getCharWidth(byte chr) const;
+	virtual int getCharWidth(uint32 chr) const;
 
-	virtual int getKerningOffset(byte left, byte right) const;
+	virtual int getKerningOffset(uint32 left, uint32 right) const;
 
-	virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const;
+	virtual void drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const;
 private:
 	bool _initialized;
 	FT_Face _face;
@@ -126,13 +126,14 @@ private:
 		Surface image;
 		int xOffset, yOffset;
 		int advance;
+		FT_UInt slot;
 	};
 
-	bool cacheGlyph(Glyph &glyph, FT_UInt &slot, uint chr);
-	typedef Common::HashMap<byte, Glyph> GlyphCache;
-	GlyphCache _glyphs;
-
-	FT_UInt _glyphSlots[256];
+	bool cacheGlyph(Glyph &glyph, uint32 chr) const;
+	typedef Common::HashMap<uint32, Glyph> GlyphCache;
+	mutable GlyphCache _glyphs;
+	bool _allowLateCaching;
+	void assureCached(uint32 chr) const;
 
 	bool _monochrome;
 	bool _hasKerning;
@@ -140,7 +141,7 @@ private:
 
 TTFFont::TTFFont()
     : _initialized(false), _face(), _ttfFile(0), _size(0), _width(0), _height(0), _ascent(0),
-      _descent(0), _glyphs(), _glyphSlots(), _monochrome(false), _hasKerning(false) {
+      _descent(0), _glyphs(), _monochrome(false), _hasKerning(false) {
 }
 
 TTFFont::~TTFFont() {
@@ -212,19 +213,26 @@ bool TTFFont::load(Common::SeekableReadStream &stream, int size, uint dpi, bool
 	_height = _ascent - _descent + 1;
 
 	if (!mapping) {
+		// Allow loading of all unicode characters.
+		_allowLateCaching = true;
+
 		// Load all ISO-8859-1 characters.
 		for (uint i = 0; i < 256; ++i) {
-			if (!cacheGlyph(_glyphs[i], _glyphSlots[i], i))
-				_glyphSlots[i] = 0;
+			if (!cacheGlyph(_glyphs[i], i)) {
+				_glyphs.erase(i);
+			}
 		}
 	} else {
+		// We have a fixed map of characters do not load more later.
+		_allowLateCaching = false;
+
 		for (uint i = 0; i < 256; ++i) {
 			const uint32 unicode = mapping[i] & 0x7FFFFFFF;
 			const bool isRequired = (mapping[i] & 0x80000000) != 0;
 			// Check whether loading an important glyph fails and error out if
 			// that is the case.
-			if (!cacheGlyph(_glyphs[i], _glyphSlots[i], unicode)) {
-				_glyphSlots[i] = 0;
+			if (!cacheGlyph(_glyphs[i], unicode)) {
+				_glyphs.erase(i);
 				if (isRequired)
 					return false;
 			}
@@ -243,7 +251,8 @@ int TTFFont::getMaxCharWidth() const {
 	return _width;
 }
 
-int TTFFont::getCharWidth(byte chr) const {
+int TTFFont::getCharWidth(uint32 chr) const {
+	assureCached(chr);
 	GlyphCache::const_iterator glyphEntry = _glyphs.find(chr);
 	if (glyphEntry == _glyphs.end())
 		return 0;
@@ -251,12 +260,29 @@ int TTFFont::getCharWidth(byte chr) const {
 		return glyphEntry->_value.advance;
 }
 
-int TTFFont::getKerningOffset(byte left, byte right) const {
+int TTFFont::getKerningOffset(uint32 left, uint32 right) const {
 	if (!_hasKerning)
 		return 0;
 
-	FT_UInt leftGlyph = _glyphSlots[left];
-	FT_UInt rightGlyph = _glyphSlots[right];
+	assureCached(left);
+	assureCached(right);
+
+	FT_UInt leftGlyph, rightGlyph;
+	GlyphCache::const_iterator glyphEntry;
+
+	glyphEntry = _glyphs.find(left);
+	if (glyphEntry != _glyphs.end()) {
+		leftGlyph = glyphEntry->_value.slot;
+	} else {
+		return 0;
+	}
+
+	glyphEntry = _glyphs.find(right);
+	if (glyphEntry != _glyphs.end()) {
+		rightGlyph = glyphEntry->_value.slot;
+	} else {
+		return 0;
+	}
 
 	if (!leftGlyph || !rightGlyph)
 		return 0;
@@ -304,7 +330,8 @@ void renderGlyph(uint8 *dstPos, const int dstPitch, const uint8 *srcPos, const i
 
 } // End of anonymous namespace
 
-void TTFFont::drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const {
+void TTFFont::drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const {
+	assureCached(chr);
 	GlyphCache::const_iterator glyphEntry = _glyphs.find(chr);
 	if (glyphEntry == _glyphs.end())
 		return;
@@ -376,11 +403,13 @@ void TTFFont::drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const
 	}
 }
 
-bool TTFFont::cacheGlyph(Glyph &glyph, FT_UInt &slot, uint chr) {
-	slot = FT_Get_Char_Index(_face, chr);
+bool TTFFont::cacheGlyph(Glyph &glyph, uint32 chr) const {
+	FT_UInt slot = FT_Get_Char_Index(_face, chr);
 	if (!slot)
 		return false;
 
+	glyph.slot = slot;
+
 	// We use the light target and render mode to improve the looks of the
 	// glyphs. It is most noticable in FreeSansBold.ttf, where otherwise the
 	// 't' glyph looks like it is cut off on the right side.
@@ -456,12 +485,24 @@ bool TTFFont::cacheGlyph(Glyph &glyph, FT_UInt &slot, uint chr) {
 
 	default:
 		warning("TTFFont::cacheGlyph: Unsupported pixel mode %d", bitmap.pixel_mode);
+		glyph.image.free();
 		return false;
 	}
 
 	return true;
 }
 
+void TTFFont::assureCached(uint32 chr) const {
+	if (!chr || !_allowLateCaching || _glyphs.contains(chr)) {
+		return;
+	}
+
+	Glyph newGlyph;
+	if (cacheGlyph(newGlyph, chr)) {
+		_glyphs[chr] = newGlyph;
+	}
+}
+
 Font *loadTTFFont(Common::SeekableReadStream &stream, int size, uint dpi, bool monochrome, const uint32 *mapping) {
 	TTFFont *font = new TTFFont();