Re: [Ql-Users] Wallpaper program

2019-02-20 Thread Derek via Ql-Users
Hi,

I was supplying Q60 cased computers with Wallpaper as standard in 2004.

I have to convert the Jpeg file by hand with Photon.

Wish I had Dilwyn's excellent programme then.

I will use it on the Q68, in the High Colour modes.
---
Regards,

Derek
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Re: [Ql-Users] Wallpaper program

2019-02-20 Thread Marcel Kilgus via Ql-Users
Dilwyn Jones via Ql-Users wrote:
> Recent versions of SMSQ/E from about version 3.00 feature high colour and
> high resolution screens along with the new Window Manager.

So "recent" being within the last 16 years ;-)

> The downside of using wallpaper on a high-colour system is the amount of
> memory it takes. On a 16-bit colour system such as QPC2 each pixel needs two
> bytes of memory, so a 1024×768 pixel display in mode 32 or 33 could need up
> to 1,572,864 bytes just to hold the uncompressed wallpaper – at the time of
> writing SMSQ/E does not support compressed wallpaper screen images.

Technically SMSQ/E never had the concept of a background, the
wallpaper is just a window that cannot be brought to the front. And as
such it needs the same amount of memory every full-screen window needs
for its save-area. This was even true if you set the background to a
plain colour!

For v3.00 I at least implemented true plain-coloured backgrounds so
that they do not need any additional memory but are drawn on-the-fly.

> Download the Wallpaper software and a few example graphic files from
> http://www.dilwyn.me.uk/graphics/index.html

Nice one, thanks.

Cheers, Marcel


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Re: [Ql-Users] Wallpaper program

2019-02-19 Thread Dave Park via Ql-Users
Having smaller, tiled images like the backgrounds often used on for example
the Acorn Risc PC helps with this. That machine did a tremendous amount
with a limit of 2MB of VRAM. Using smaller images actually increases the
CPU load, so that was the trade-off. Memory or CPU. Pick one ;)

Ah yes, fun times.

Dave



On Tue, Feb 19, 2019 at 6:26 AM Bob Spelten via Ql-Users <
ql-users@lists.q-v-d.com> wrote:

> Op Tue, 19 Feb 2019 11:19:19 +0100 schreef Dilwyn Jones via Ql-Users
> :
>
> > Wallpaper Program
> >
> > Recent versionsof SMSQ/E from about version 3.00 feature high colour
> and
> > high resolution screens along with the new Window Manager. This makes
> > them very suitable for displaying colourful and attractive background
> > images behind your program windows.
> > (...)
> >The downside of using wallpaper on a high-colour system is the amount of
> > memory it takes. (...)
> >
> Thanks Dilwyn for automating the wallpaper process.
>
> Just a word about memory and compressed images.
> As other programs or other OSes appear to put compressed images straight
> to the screen, I suspect they all need to keep a final uncompressed
> version in memory to work.
> The space demands may go unnoticed as other systems have more RAM to play
> with.
> This is also true for compressed sprites that WMAN2 processes directly.
> Compressing _pic or _scr files is feasible but it's mostly WIN space that
> is won.
>
> Bob
>
> > Download the Wallpaper software and a few example graphic files from
> > http://www.dilwyn.me.uk/graphics/index.html
> >
>
> --
> The BSJR QL software site at: "http://members.upc.nl/b.spelten/ql/;
>
> ---
> Deze e-mail is gecontroleerd op virussen door AVG.
> http://www.avg.com
>
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>


-- 
Dave Park
d...@sinclairql.com
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Re: [Ql-Users] Wallpaper program

2019-02-19 Thread Bob Spelten via Ql-Users
Op Tue, 19 Feb 2019 11:19:19 +0100 schreef Dilwyn Jones via Ql-Users  
:



Wallpaper Program

Recent versionsof SMSQ/E from about version 3.00 feature high colour and  
high resolution screens along with the new Window Manager. This makes  
them very suitable for displaying colourful and attractive background  
images behind your program windows.

(...)
The downside of using wallpaper on a high-colour system is the amount of  
memory it takes. (...)



Thanks Dilwyn for automating the wallpaper process.

Just a word about memory and compressed images.
As other programs or other OSes appear to put compressed images straight  
to the screen, I suspect they all need to keep a final uncompressed  
version in memory to work.
The space demands may go unnoticed as other systems have more RAM to play  
with.

This is also true for compressed sprites that WMAN2 processes directly.
Compressing _pic or _scr files is feasible but it's mostly WIN space that  
is won.


Bob

Download the Wallpaper software and a few example graphic files from  
http://www.dilwyn.me.uk/graphics/index.html




--
The BSJR QL software site at: "http://members.upc.nl/b.spelten/ql/;

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