Re: [Devel] fixed pitch fonts: should isFixedPitch be honoured?

[Graham . Asher]

Yes, I know; and if we ignore isFixedPitch everything is fine. So I'm still
all for ignoring it. It should be the responsibility of 'higher-level
protocols' as the saying goes (like OS rendering systems and word
processors) to decide whether to throw away the information - by forcing
characters to the same width - or not. But they can only do this if the
information is not thrown away at the lower level.

Graham Asher



                                                                                
                                   
                    "Marc L                                                     
                                   
                    Cohen"               To:     address@hidden                 
                         
                    <address@hidden        cc:                                  
                                     
                    bm.com>              Subject:     Re: [Devel] fixed pitch 
fonts: should isFixedPitch be        
                                         honoured?                              
                                   
                    23/03/01                                                    
                                   
                    17:27                                                       
                                   
                                                                                
                                   
                                                                                
                                   




>David,
>
>I should have explained in a bit more detail. What happens is that,
because
>the Chinese ideograms are about 1 em wide, and I guess that's the width of
>the widest character, all the Roman characters look ridiculously widely
>spaced l i k e  t h i s. It *doesn't* happen on Microsoft Windows NT
>applications, so it looks like Microsoft's font rendering logic is
ignoring
>the flag.
>
>I am not sure whether the rasterizer needs to do anything with a
>fixed-pitch flag except maybe avoid hinting the characters in a way that
>might make them different widths. I am probably rather ignorant, but
surely
>a fixed-width font would set all its glyphs to the same advance width
>anyway. If it doesn't then an application is free to ignore the returned
>widths and impose a standard advance width, but that is another matter.
>
>What do you think?
>
>Graham

In general, for monospaced DBCS fonts, the Latin glyphs are spaced as
half-width glyphs.

Marc L. Cohen
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