Rendering 16bits on 32bits deserve deeper analysis.
Last week I saw this 16bit pixel 16r7FFF, which is white with 5 bits
per color, translated to 16r00F8F8F8, that is the same 11111 bit
pattern shifted by 3 bits to fit on 8 bits per color.
The bug I was tracking was the associated alpha channel 00 meaning
100% transparence, but the color bit pattern itself was surprising, I
would have expected 16rFFFFFFFF.

Nicolas

2011/5/2 Ben Coman <btc at openinworld.com>:
> Jim Rosenberg wrote:
>>
>> When I pop on an SVG monitor to the laptop, the color anomaly occurs there
>> too.
>>
> I am new to Squeak but I did 15yrs IT Support, so perhaps can offer some
> small assistance.
> 1. Can you make a sample code snippet with five rectangles at 100%, 75%,
> 50%, 25%, 0%? Also please attach a screen snapshot of the result, so the
> pixel values can be observed directly by those troubleshooting it. 2. Is
> "SVG Monitor" a squeak package, a Windows program (which one), or a physical
> external monitor? 3. Do the gray artifacts affect any non-Squeak windows?
>
> cheers, Ben
>
>