Re: Faster text drawing with configurable stroke width
Re: Faster text drawing with configurable stroke width
- Subject: Re: Faster text drawing with configurable stroke width
- From: Ken Ferry <email@hidden>
- Date: Wed, 16 Mar 2011 21:55:26 -0700
On Sun, Mar 13, 2011 at 3:03 PM, George Nachman <email@hidden> wrote:
> Hi cocoa-dev,
>
> I'm currently drawing text one character at a time with
> -[NSAttributedString
> drawWithRect:options:], and it is really slow. I'm looking for a faster
> alternative.
>
> I draw one character at a time because I need exact control over horizontal
> positioning (regardless of whether the font is monospaced or not, I force
> characters onto a grid--this is non-negotiable) and I'm not aware of
> another
> way to achieve this that also supports my second requirement:
>
> I am using -[NSAttributedString drawWithRect:options:]
> instead CGContextShowGlyphsWithAdvances() or CTLineDraw() because it
> supports NSStrokeWidthAttributeName.
Have you looked at CGContextSetTextDrawingMode and CGContextSetLineWidth?
> It also does a nice (but not as nice a
> NSTextView) job at rendering combining marks.
>
> My performance troubles are significant when there is a substantial amount
> of new text, so caching layouts would do me little good. I suspect there
> might be something lurking in NSLayoutManager/NSTypesetter/etc. that can
> help me, but I haven't found it.
>
> Thanks for your help,
> George
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