LOGO-L> Re: SETLABELFONT and GIFSAVE

[Yehuka <yehuka@beitberl.ac.il>]

George Mills wrote:

> If I GIFSAVE an image with continuous colors, I loose the smooth
> continuation. I attach two images: The higher is GIFSAVEd while the
> other was captured by MOUSECOPY and .gif-ed in PaintShop Pro.
 

GIF images have lots of color limitations. Because of this the
GIF generation code has to make trade-offs. I use a 3rd party package
to do the color conversion. You may find one package does better
with one image and poor with another image. And you may find the reverse
is true with another package. Some real high end packages might
examine how you used color and make the best choice for either
picture.

What color mode are you working in?

When your doing GIF's working in 256 color will probably give you
the most similar GIF result but still will not be exact.

Remember when working in 256 color and using lots of colors you
have to CLEARPALETTE now and then see Status Window.

Other compressed graphics image files make different tradeoffs.

Here's the program in question. Please run it and see my point. On screen, or saved as 256-colors from PSP,  I have a smoother image.

I really don't care if this is how MSWLogo treats "many" colors (as you mentioned - I can always paste it in another graphic package to get some different results), I was only afraid that I was missing something.

About the Status window I'm afraid I didn't understand. What am I supposed to see there?

I appreciate you help,

[[Yehuda]]

---

to main
cs ht clearpalette
frame
seth 90 txt
;save_it
end

to frame
pu setxy -234 -30 pd
for[x -234 234][
   setpc(se abs :x*1.09 178 0) fd 60 bk 60 pu setx xcor+1 pd]
end

to txt
setlabelfont[[Nadianne] -29 0 0 700 1 0 0 0 3 2 1 74]
setpc[255 0 0] spl -219 17[Logo Turtle Graphics Gallery]
setpc[160 0 0] spl -220 18[Logo Turtle Graphics Gallery]
end

to save_it
setactivearea[-234 -30 234 30]
gifsave "test.gif
end