How to get pixel dimensions of a string using GTK&Pango?

[Ken Resander <kresander yahoo com>]

I am translating a bunch of Windows programs that critically need to work out pixel dimensions of a string (with no newlines in it).
On Windows I first call getfont:

void getfont ( char * fontfacename , int sizeinpts , int weight , HFONT * hfret )
   {
   LOGFONT lf = usewindowsapifunctions ( fontfacename , sizeinpts , weight );
   *hfret = CreateFontIndirect ( &lf ) ;
   }

and then for all strings to be measured call this:

int getpixeldims ( HFONT hf , char * stringtomeasure ,
                   int * widthret , int * heightret )
   {
   HDC hdc = GetDC ( 0 );      // device context of screen
   HGIOBJ prev = SelectObject ( hdc , hf );  // add font to context
   SIZE s;
   int len = strlen ( stringtomeasure );
   GetTextExtentPoint ( hdc , stringtomeasure , len , &s );  // measures
   SelectObject ( hdc , prev );
   ReleaseDC ( 0 , hdc );

   *widthret = s.cx;
   *heightret = s.cy;
   }

I think I need Pango for this, but I have no idea how to use it. I have the Pango reference manual and have read the tutorials by Tony Graham, but have not found any examples to learn from.

Help would be most appreciated.

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