iPhone dev Stupidity 101: How to draw text vertically?

1. Drawing NSString in unusual direction : limited to ascii string and have effect like this:

    use CGContextShowText(ctxt, tbuf.c_str(), tbuf.length()); and CGAffineTransform 

2. CGFontGetGlyphsForUnichars

   to draw unichar we need this function to get glyph out of a unichar. Then core graphic has a set of function for showing glyph like this one:

void CGContextShowGlyphsAtPoint (
   CGContextRef c,
   CGFloat x,
   CGFloat y,
   const CGGlyph glyphs[],
   size_t count
);

but CGFontGetGlyphsForUnichars is a private API for iPhone. So we got:

3. A replacement for CGFontGetGlyphsForUnichars

on github

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4. bonus: draw gradient filled UILabel.

also uses: extern void CGFontGetGlyphsForUnichars(CGFontRef, const UniChar[], const CGGlyph[], size_t);