Re: [Ql-Users] Wallpaper program
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 ___ QL-Users Mailing List
Re: [Ql-Users] Wallpaper program
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 ___ QL-Users Mailing List
Re: [Ql-Users] Wallpaper program
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 > > ___ > QL-Users Mailing List > -- Dave Park d...@sinclairql.com ___ QL-Users Mailing List
Re: [Ql-Users] Wallpaper program
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 ___ QL-Users Mailing List
