ia0i+@andrew.cmu.edu (Indu Tara Agarwal) (04/23/91)
I have in my hands the latest copy of .INFO magazine which describes a new product called Macro Paint from Lake Forest Logic Inc. It is (according to this article) the first 'paint' program which works in Dynamic Hi-res. I was wondering if anyone had tried out a copy yet and could give an impromptu review. Also, I have a question about Dynamic Hi-res itself. I understand how you set up the copper lists to select the 'optimal' 16 color palette for each scan line, but here's something that puzzled me: What if you drew, say, 100 1-pixel wide vertical lines, and intended to make each one a different color? How could this mode (purported to display all 4096 colors with no color fringing) possibly display that w/out fringing? And remember, I mean 1-pixel wide so no tricky dithering is acceptable. --If the above question seems inane, obvious, or downright assinine, please explain what I am misunderstanding about how the mode works. (I'm working from the proverb that says: There are NO dumb questions. :-) Thanks a million!
dvljrt@cs.umu.se (Joakim Rosqvist) (04/24/91)
In article <kc4lukS00WB44Junsl@andrew.cmu.edu> ia0i+@andrew.cmu.edu (Indu Tara Agarwal) writes: > >Also, I have a question about Dynamic Hi-res itself. I understand how you >set up the copper lists to select the 'optimal' 16 color palette for each >scan line, but here's something that puzzled me: > >What if you drew, say, 100 1-pixel wide vertical lines, and intended to make >each one a different color? How could this mode (purported to display all >4096 colors with no color fringing) possibly display that w/out fringing? > >And remember, I mean 1-pixel wide so no tricky dithering is acceptable. > No, this is not possible. Just as you say, there are 16 colors per scanline so you naturally can't have 100 different ones! /$DR.HEX$
ia0i+@andrew.cmu.edu (Indu Tara Agarwal) (04/24/91)
Thanks for answering my question! I was _REALLY_ confused about what I was reading in various ads and articles. They repeatedly stressed the point that you could get "...4096 colors _fringe-free_..." and I went crazy trying to put together a copper list hack which could get more than 16 colors on one scan line in this mode and have no color-bleed! Actually though, this attempt started me thinking about other ways to "beat" the system and get more colors fringe-free. Would it be possible to hack a program together that would open multiple Dynamic-Hires screens (assuming you had enough chip-ram), and then do some sort of tricky "page-flipping" to get the appearance of more than 16 colors per scanline with the multiple screens?? I realize that you would get a flashing image that would make interlace flicker seem non-existent by comparison, but assuming that you had a __>>REALLLLLYY<<__ high persistence monitor to smooth out the strobe effect, could it be done? If the above seems inane or assinine, I'm sorry, but I really am curious. And yes, I know that if you had a >>REALLY<< high persistence monitor you could do this with normal hires screens as well.... :^) I guess it boils down to this: What is the fastest rate you could "page-flip" a couple of Dynamic-Hires Screens in this fashion to get a "..tolerable.." amount of screen flashing and still seem like you had more than 16 colors per scan-line? I know that some games use a double-buffered "page-flip" kind of thing to get rid of jerkiness during play, but has anyone tried this sort of scheme with other programs to "increase" the number of colors displayed on a screen? (Paint programs are the first usage I see, but assuming it could be done, it could be applied to data-plotting utilities and such where you might need more than 32 colors in order to differentiate between various plots, etc...) Any replies, negative or otherwise, are WELCOME! ===================================================================== "I'm proceeding from the assumption that there's no such thing as a dumb question!"