[squeak-dev] 16-bit Color black isn't

David T. Lewis lewis at mail.msen.com
Mon May 2 01:27:04 UTC 2011


On Sun, May 01, 2011 at 09:04:24PM -0400, Jim Rosenberg wrote:
> Am still back at Squeak 3.8; apologies if this has been fixed in more 
> recent versions.
> 
> I've suddenly run into a really vexing problem in which the usual 100% 
> bit-compatible behavior of Squeak is not quite there. I'm just about 
> finished with evacuating Apple and moving my life to Linux. My desktop 
> machine is Slackware 12.2, KDE 3.5. Everything works fine. My new laptop 
> has a Radeon video driver, runs Slackware 13.1, KDE 4. I'd noticed some odd 
> effects on the laptop in terms of some things showing up strange shades of 
> gray when I expected them to be black. Now it seems I can figure out 
> approximately when this happens: 16-bit forms. My 16-bit forms are showing 
> on my 32-bit color on the laptop as if they were 32-bit forms with 16 bits 
> of precision, or something of that kind; I'm certainly *not* getting 16-bit 
> black showing up on the display as 32-bit black. When I pop on an SVG 
> monitor to the laptop, the color anomaly occurs there too.
> 
> Is there a preference I can set to fix this? This problem is going to 
> really hurt if I want to present from my laptop.

Jim,

Can you please provide a snippet of code that illustrates the problem?

Thanks,
Dave




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