On 19 Nov 2002, at 20:49, Dilwyn Jones wrote: > > Anyone have any experience of saving and restoring screen areas with > Easyptr under GD2? Can it be made to work reliably or not? > > I had a quick go and could get it to load (L_WSA) a mode 32 PIC file > and display it (using WSARS) as long as the PIC file and the current > screen mode were the same,
I don't know about Easyptr, but if it uses the underlying PI features, then this is correct - it saves and restores screen areas and expects them to be in the same screen mode when restoring as when saving. > i.e. mode 32 pictures could only be displayed in mode 32, a mode 0 (QL > 4 colour) pic could not be displayed in mode 32 for example, which was > probably predictable. yup. > If anyone knows more about this, let me know to save me wasting too > much time on something which can't be done reliably yet. (I'm trying > to write a simple PIC and SCR graphics viewer for Launchpad using > Easyptr). No, that wouldn't really work with these OS (PI) calls, if the images to be displayed aren't of the same screen mode. You would need some kind of conversion program. I can't remember whether the scr format stores the screen format/mode with the file or not - if you need that info, I can find out. > What I'm afraid of is a scenario like: I find it only works on QPC2 > for example as it's the only GD2 system I have to test it on at the > moment! If, again, it uses the underlying OS calls, then is should work on any machine as well as on QPC. > It seems to work at first glance, but it's my first significant foray > into Easyptr versus GD2, so any advice gratefully received! I have always foun that GD2 doesn't really change anything for programs that aren't aware of it, so that shouldn't be too much of a problem. Wolfgang
