Re: Contributing to ScummVM with an interpreter for Magnetic Scrolls?

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It doesn't add any significant delay. An individual picture is only decoded
when a ".raw" file is opened, and the virtual filesystem pretty much simply
wraps the results of the Infocom decompression code in a stream so that all
file reads read from that memory buffer. As for animations, that'll be an
interesting question. The Glk code only deals with drawing static pictures
by frame number. So it's likely the existing Magnetic engine does it's own
manual handling of animations currently. If so, I could probably add code
to present the animations as if they were a graphics format that supports
frames, like APNG or GIF, then have the core Glk handle drawing the
animation when an animated picture number is specified for drawing. Maybe..
I'll have to see how it goes.

Paul.

On Sun, May 5, 2019 at 5:06 PM Thomas Dettbarn <[email protected]> wrote:

> Sounds like a compromise. How fast is it? Would it be able to handle
> animations?
>

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<div dir=3D"ltr"><div>It doesn&#39;t add any significant delay. An individu=
al picture is only decoded when a &quot;.raw&quot; file is opened, and the =
virtual filesystem pretty much simply wraps the results of the Infocom deco=
mpression code in a stream so that all file reads read from that memory buf=
fer. As for animations, that&#39;ll be an interesting question. The Glk cod=
e only deals with drawing static pictures by frame number. So it&#39;s like=
ly the existing Magnetic engine does it&#39;s own manual handling of animat=
ions currently. If so, I could probably add code to present the animations =
as if they were a graphics format that supports frames, like APNG or GIF, t=
hen have the core Glk handle drawing the animation when an animated picture=
 number is specified for drawing. Maybe.. I&#39;ll have to see how it goes.=
</div><div><br></div><div>Paul.</div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr" class=3D"gmail_attr">On Sun, May 5, 2019 at 5:06 PM Thomas Dettba=
rn &lt;<a href=3D"mailto:[email protected]">[email protected]</a>&gt; wrote=
:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>

   =20
<div><p>Sounds like a compromise. How fast is it? Would it be able to handl=
e animations?=C2=A0</p></div></blockquote><div>=C2=A0</div></div></div>

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