Re: Rendering of fixed-width fonts

[Adrian Robert]

On Mar 16, 2005, at 12:57 AM, Banlu Kemiyatorn wrote:

> On Tue, 15 Mar 2005 22:12:02 -0700, Adam Fedor <address@hidden> wrote:
> > On Mar 15, 2005, at 9:57 PM, Adrian Robert wrote:
> > > Ah.  Attached is a patch implementing these functions in back-art.  
> > > ;-)
> > >
> > > It modifies the existing DPSshow implementation to handle DPSxyshow,
> > > DPSxshow, and DPSyshow.  Partial support is there for DPSwidthshow.
> > > Right now I just patched ftfont-old.m since that's what I'm using
> > > (freetype-2.1.2), and anyway this patch needs some feedback.
> > Well, I may have led you astray.  I think we were trying to make these
> > functions obsolete. Although, I'm not sure why now.  If you find they
> > make a big speed improvement, I suppose we could reconsider....

It's true that I saw these particular functions (DPS{x,y,xy}show) 
deprecated in the NSGraphicsContext documentation.  I couldn't find 
indication of why though, either here or on the web relating to DPS in 
general.  But they seem to provide useful functionality that doesn't 
directly duplicate something else, and are not hard to implement, so 
why not leave them?


> Hmmm, I didn't know any attempt to make DPS functions obsolete
> so I keep using them a lot :( BTW, it seems PSops still  working
> on OSX last time I tried them on jaguar, but they are buggy and I
> have no idea about panther.

I tried this on Panther but I just get "blank" rendering. ;)  Or do I 
need to do something in addition to:

    NSGraphicsContext *ctxt = [NSGraphicsContext currentContext];
    DPSgsave(ctxt);
    [font set];
    [color set];
    PSmoveto(x,y);
    PSshow(txt);
    PSstroke();
    DPSrestore(ctxt);

I also tried throwing a PSflush() in, and anyway the window is flushed 
later, which works on GNUstep.