AW: Is RGB on Mac something else as RGB on windows?

Tiemo Hollmann TB toolbook at kestner.de
Fri Sep 12 13:09:40 EDT 2014


Some more testing:
The mousecolor returns the same RGB on Mac and Win. I need this for
comparing each pixel of an imageData with this mousecolor.
But when looping through the imageData of an image, the charToNum(char x of
tImageData) returns a different value on Mac and Win.
Up to now, it seems that the Mac value is always 30 less than on Win, same
for R,G and B
If this keeps constant on further testing, I can manipulate the values on
Mac by this constant. But enough for today.
Tiemo




> -----Ursprüngliche Nachricht-----
> Von: use-livecode [mailto:use-livecode-bounces at lists.runrev.com] Im
Auftrag
> von Tiemo Hollmann TB
> Gesendet: Freitag, 12. September 2014 18:32
> An: 'How to use LiveCode'
> Betreff: AW: Is RGB on Mac something else as RGB on windows?
> 
> Hi Trevor,
> 
> hmm, might be we are experiencing the same issue. The more I am testing,
the
> more I get confused what happens with the RGB on Mac.
> Because I never would have thought that there could be an issue related to
> this between windows and Mac this issue hits me at the latest stage in my
> development process at the finishing tests close before release. Probably
I
> have to suspend my whole release plan now.
> Tiemo
> 
> 
> > -----Ursprüngliche Nachricht-----
> > Von: use-livecode [mailto:use-livecode-bounces at lists.runrev.com] Im
> Auftrag
> > von Trevor DeVore
> > Gesendet: Freitag, 12. September 2014 16:29
> > An: How to use LiveCode
> > Betreff: Re: Is RGB on Mac something else as RGB on windows?
> >
> > On Fri, Sep 12, 2014 at 8:29 AM, Tiemo Hollmann TB
> > <toolbook at kestner.de>
> > wrote:
> >
> > > I have an application, where I manipulate an image. I exchange a
> > > specified RGB color by another value. I developed this app on
> > > windows and everything works fine. Now at final testing my function
> > > seems to be broken, because the same image (a screenshot taken from
> > > a video) seems to have other RGB values on a Mac, so that the
> > > exchange doesen't work anymore on a Mac.
> > >
> > > I tested to create a png with photoshop on Windows with a blue color
> > > 100,150,200. Opening this png on my Mac and picking the color it
> > > gives
> me:
> > > 83,131,185. Isn't RGB = RGB on different platforms? That the same
> > > RGB might display different on different monitors is clear, but a
> > > different RGB value?
> > >
> >
> > Perhaps you are seeing the issue described in this bug report?
> >
> > http://quality.runrev.com/show_bug.cgi?id=13208
> >
> > It doesn't look like LiveCode on OS X handles color profiles properly
> > when loading image files.
> >
> > --
> > Trevor DeVore
> > ScreenSteps
> > www.screensteps.com    -    www.clarify-it.com
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> 
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