[Gambas-user] Picture.ToString() ?

[Bruce Steers]

On Sun, 31 Dec 2023 at 12:07, Claus Dietrich <claus.dietrich at freenet.de>
wrote:

> Am 30.12.23 um 19:40 schrieb Bruce Steers:
> > The initial objective was to avoid having to use a real file for speed.
> > Just send picture data as a string, without having to save to a
> > physical file then re-read it with File.Load.
> >
> > It seems logical that if there is Picture.FromString then there may be
> > a ToString alternative.
>
> Hi
>
> I agree and also think of a Picture.ToString-method which provides a
> string representation of a bitmap file. The conversion routines proposed
> so far do something different. The following function is based on the
> one used by Bruce, but it utilizes a virtual file system located in the
> RAM instead of the physical hard-drive:
>
> Public Sub PictureToString(Pic As Picture, sFormat as String, Optional
> iQuality as Integer = 100) As String
>
>       Dim sPath As String
>
>       Shell "echo $XDG_RUNTIME_DIR" Wait To sPath
>       sPath = Trim(sPath) & "/tmppic." & sFormat
>       Pic.Save(sPath, iQuality)
>       Return File.Load(sPath)
>
> End
>
> I can imagine that an according picture/image-method for this would be
> useful particularly if it would be quicker.
>
> Regards
>
> Claus
>

After a little research I found a possible solution, I just tried adding
this line to my /etc/fstab file...
tmpfs /tmp tmpfs defaults,noatime,nosuid,nodev,noexec,mode=1777,size=4G 0 0

That made my /tmp folder a 4gb tmpfs ram disk thus technically negating
this problem as using memory not hd is accomplished.

But then everything on my computer worked except ALL of my gambas
applications.
It seemed to break gb.jit
I could use my programs only by using env GB_NO_JIT=true ./appname.gambas
Otherwise they all reported jit errors :(

I agree a tmpfs location or any other ramdisk like you suggest should speed
things up.  Using the XDG_RUNTIME_DIR seems like a pretty good solution :)

I still think it should be possible to fake the disk access using Open
Memory or something to save and reload the picture. (I just don't know how)

Respects
BruceS
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