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Zimphire · Jul 1, 2003, 06:24 PM

Ok, so in some pxms like "Secondary Group Box Fill" I go and past a RGB shades of 234,234,234. I look and sure enough it is not 234x3 but 225x3. No matter what I do, ThemePark wont let me change it to 234. It keeps reverting to 225. What's the deal? Does it have a limit on the amount of shades of grey it can use?

smeger · Jul 1, 2003, 07:14 PM

What is the value of the alpha channel?

Zimphire · Jul 1, 2003, 07:17 PM

Plain old white.

Oh and it should be noted I am doing this in Panther.

Zimphire · Jul 1, 2003, 10:33 PM

smeger told me to change the images to index color and it worked.

Thanks.

smeger · Jul 1, 2003, 11:13 PM

For the edification of anyone else reading this thread, I believe that this is caused by a longstanding bug that's either in Apple's image processing code or in Photoshop. You can see the same bug copying and pasting between Photoshop and Preview.app with ThemePark nowhere in the mix.

This same bug is also responsible for bogus colors sometimes showing up when you paste images into ThemePark. See, for example, this thread.

(The fix, by the way, is to convert the Photoshop image to indexed color before copying it).

It's really a bummer that there are all of these bugs in the image handling routines. For example, Apple's docs state that images with transparency are always premultiplied when they're created. But it turns out that they're not - the code applies a formula to the image and uses the results to determine whether to premultiply, meaning that sometimes things you don't want premultipied get it done or vice versa. And there's no way of turning off this behavior, or even finding out whether Apple's code went ahead and premultiplied your image for you so you could at least start from a known state.

Annoying, to say the least.

quandarry · Jul 1, 2003, 11:37 PM

i use graphic converter quite a lot and get this yellow or green crap when pasting into themepark sometimes...it seems worst when copying and pasting two single rows of vertcal pixels...the second row will have yellowish tinge...with one, three or more it rarely if ever happens i think it's a problem with the copy/paste routines in the operating system...

smeger · Jul 2, 2003, 02:38 AM

Originally posted by quandarry:
i use graphic converter quite a lot and get this yellow or green crap when pasting into themepark sometimes...it seems worst when copying and pasting two single rows of vertcal pixels...the second row will have yellowish tinge...with one, three or more it rarely if ever happens i think it's a problem with the copy/paste routines in the operating system...

I think so too. I'd find it hard to believe that Photoshop, the world's premiere imaging application, manages to put crap on the pasteboard when you copy.

And since there are all sorts of bugs in Apple's CoreGraphics, it's not much stretch to think that this is another one.