Re: Screen update and feeling the bits between your toes

• To: Scott McKay <SWM@sapsucker.scrc.symbolics.com>
• Subject: Re: Screen update and feeling the bits between your toes
• From: Brad Miller <miller@sol.cs.rochester.edu>
• Date: Fri, 11 Oct 1991 19:05-0400
• Cc: moon@cambridge.apple.com, mayer@wrc.xerox.com, clim@BBN.COM
• In-Reply-To: <19911011204844.2.SWM@EVENING-GROSBEAK.SCRC.Symbolics.COM>
• Organization: University of Rochester, Department of Computer Science
• Phone: 716-275-1118
• Postal-Address: 610 CS Building, Comp Sci Dept., U. Rochester, Rochester NY 14627-0226
• Reply-To: miller@sol.cs.rochester.edu
• Sender: miller@sol.cs.rochester.edu

    Date: Fri, 11 Oct 1991 16:48 EDT
    From: Scott McKay <SWM@sapsucker.scrc.symbolics.com>


    Some requests for COPY-AREA have really been for a facility that caches
    a commonly drawn piece of output and then replicates it in a new place.
    Incremental redisplay is not helpful here (even if it did BITBLT
    optimizations).

Personally, I'd find this (slapping up bitmaps as glyphs) far more useful
than copy-area. A form of incremental redisplay could be helpful if it dealt
with objects rather than areas on the screen, i.e. it knows if an object has
an x-y locaion that has changed, and it erased the old bitmap and slapped up
the new one. But I want animation...

----
 Brad Miller		U. Rochester Comp Sci Dept.
 miller@cs.rochester.edu {...allegra!rochester!miller}

0,,

• Re: Screen update and feeling the bits between your toes
• From: Scott McKay <SWM@sapsucker.scrc.symbolics.com>

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