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[Phantom]

I'm considering writing a tutorial on the sub-pixel technique used by JS Landscape, probably illustrated by some 3D's using 1/3rd pixel wide lines.<br><br>Simple questions: Is this interesting to you guys, or are you already completely familiar with that topic? In that case I would probably embed it in a tutorial on a different topic and just briefly mention it.

[Phantom]

By the way, I'm not going to ask for permission for every topic, of course. I got 997 visitors on tutorial 7 in 1 day, and 655 on the second day, so it's obviously not only the PM crew that is reading the stuff. Note to other (aspirant) tutorial writers: These numbers indicate that people still need tutorials. You too can be famous.

[Digby]

I've never used JS Landscape, but are you referring to color-interpolated stretch/shrink blits?<br><br>

[daburnd]

u want to say that a pixel can on a tft display can be divided into 4 pieces and can be given 4 <br>seperate colors? or just the illusion that this can be done?

[cryo]

yeah yeah, i didnt say the world does not need tutorials anymore <br><br>Please go ahead and incorporate the subpixel stuff in your next tut. In the next step (or when i finally get my copy of plat. builder) we go for a JS Landscape clone <br><br>M.E.<br>

[Phantom]

Ehm, I hope I ain't spoiling the fun of reading tutorial 8, but the idea of subpixel stuff like JS Landscape is that you exploit the fact that each pixel is in fact a combination of r, g and b. The three color components are at a physically different location on the PocketPC display. So, setting only one of them would make a line look 1/3rd of a pixel thin. If the line is sloped, you can still get it to look white. The same trick can be applied to scrolling, without color artifacts (the eye doesn't care whether the color components are sorted like r,g,b or g,b,r).

[Captain_Chickenpants]

Sounds interesting, however I think this site covers it pretty well as this is how Cleartype works for Microsoft Reader<br>http://grc.com/freeandclear.htm<br><br>Still an interesting topic. <br>How about using it to do some line antialiasing, as your demo?<br><br>Paul.

[Phantom]

That site indeed explains how it is done. There's a problem however: The iPaq has an odd ordering of the color components. I believe even that has been covered by some article on some website, but I would like to embed it in a 'real' application. I would also like to give you 'plot' and 'line' functions that work with sub-pixel stuff. That would be a solid basis to do some experimenting yourself.

[Digby]

Jacco,<br><br>Go for it.  I looked at implementing an antialias scheme using this method over a year ago.  Seems to work fine for high-contrast scenes like black text on a white background.  Didn't work so well with other color combinations.  I look forward to reading what you have to say.<br><br>

[CARPEDIEM]

Burp.<br>

[PDAFantast]

Phantom, you would want to talk to Mark Rehjon, www.marky.com. He knows like everything about subpixeling on PPC.<br><br>

[Phantom]

No, he just has been pushing his knowledge too much. There's not that much to know about the topic. It would be hard to spend more than 1 tutorial on it. If I'm correct, Mark wrote some code that resizes images while using the subpixeling to increase the quality of the resized image. This is nice and stuff, but hardly worth mentioning a thousand times, IMHO.