diff -r dce7325109c1 -r 50a1857557da sdlterm/src/sdlterm.h
--- a/sdlterm/src/sdlterm.h	Sat Jan 05 18:56:45 2013 +0100
+++ b/sdlterm/src/sdlterm.h	Sat Jan 05 23:00:41 2013 +0100
@@ -5,12 +5,12 @@
 #include <vector>
 
 
-enum class Style: Uint16
+namespace Style
 {
-    BOLD      = 1 << 0,  // bold font
-    UNDERLINE = 1 << 1,  // underline text
-    STANDOUT  = 1 << 2,  // inverse bg/fg
-    BLINK     = 1 << 3,  // blinking
+    const int BOLD      = 1 << 0;  // bold font
+    const int UNDERLINE = 1 << 1;  // underline text
+    const int STANDOUT  = 1 << 2;  // inverse bg/fg
+    const int BLINK     = 1 << 3;  // blinking
 };
 
 
@@ -44,12 +44,13 @@
 class GlyphCache
 {
 public:
-    SDL_Surface *lookup_glyph(Uint16 ch);
-    void put_glyph(Uint16 ch, SDL_Surface *srf);
+    // lookup glyph in cache, id is combined char and attr
+    SDL_Surface *lookup_glyph(Uint64 id);
+    void put_glyph(Uint64 id, SDL_Surface *srf);
     void flush();
 
 private:
-    std::map<Uint16, SDL_Surface*> _glyph_map;
+    std::map<Uint64, SDL_Surface*> _glyph_map;
 };
 
 
@@ -63,7 +64,7 @@
     void close_font();
 
     // do not free surface returned!
-    SDL_Surface *render_cell(Uint16 ch, Uint16 attr);
+    SDL_Surface *render_cell(Uint32 ch, Uint32 attr);
 
     int get_cell_width() { return _cell_width; };
     int get_cell_height() { return _cell_height; };
@@ -75,13 +76,30 @@
     int _cell_height;
     GlyphCache _cache;
     ColorMap _colormap;
+
+    void _render_glyph(SDL_Surface *cell_surface, TTF_Font *font, Uint32 ch,
+            SDL_Color fgcolor, SDL_Color bgcolor);
 };
 
 
+/* One cell of terminal window
+ *
+ * Each cell contains one character, its color and attributes.
+ * Character is encoded in 32bit unicode.
+ * Other 32 bits are attributes:
+ *   0-7   (8b) - foreground color index
+ *   8-15  (8b) - background color index
+ *   16-23 (8b) - RESERVED for alpha channel
+ *   24    (1b) - bold font
+ *   25    (1b) - underline
+ *   26    (1b) - standout (swap fg/bg color)
+ *   27    (1b) - blink
+ *   28-31 (4b) - RESERVED
+ */
 struct TerminalCell
 {
-    Uint16 ch;
-    Uint16 attr;
+    Uint32 ch;
+    Uint32 attr;
     bool operator !=(const TerminalCell &rhs) const { return ch != rhs.ch || attr != rhs.attr; };
 };
 
@@ -99,7 +117,7 @@
     void resize(int pxwidth, int pxheight);
 
     void erase();
-    void putch(int x, int y, Uint16 ch, Uint16 attr);
+    void putch(int x, int y, Uint32 ch, Uint32 attr);
     void commit();
 
     int get_width() { return _width; };
@@ -134,7 +152,7 @@
         struct
         {
             char keyname[10];
-            Uint16 unicode;
+            Uint32 unicode;
         } key;
         struct
         {
@@ -156,11 +174,11 @@
     void resize(int pxwidth, int pxheight) { _screen.resize(pxwidth, pxheight); };
 
     void erase() { _screen.erase(); };
-    void putch(int x, int y, Uint16 ch) { _screen.putch(x, y, ch, _attr); };
+    void putch(int x, int y, Uint32 ch) { _screen.putch(x, y, ch, _attr); };
     void commit() { _screen.commit(); };
 
-    Uint16 prepare_attr(Uint8 fg, Uint8 bg, Uint8 style) { return fg | bg << 4 | style << 8; };
-    void set_attr(Uint16 value) { _attr = value; };
+    Uint32 prepare_attr(Uint8 fg, Uint8 bg, Uint8 style) { return (Uint32)fg | (Uint32)bg << 8 | (Uint32)style << 24; };
+    void set_attr(Uint32 value) { _attr = value; };
 
     void set_cursor(int x, int y) { _cursor_x = x; _cursor_y = y; };
     void show_cursor(bool visible) { _cursor_visible = visible; };
@@ -172,7 +190,7 @@
 
 private:
     TerminalScreen _screen;
-    Uint16 _attr;
+    Uint32 _attr;
     int _cursor_x;
     int _cursor_y;
     bool _cursor_visible;