Triode wrote:
> 
> On intel mac I get different pixels from the following:
> 
> new:pixel(i,(j*8-k)*2,  256*256*256*255 + 256*256*255 + 256*255 + 255 )
> new:pixel(i,(j*8-k)*2+1,0xFFFFFFFF)
> 
> The hex value one seems to be converted to a signed value by lua and prints as -1 all platforms.  The decimal one is 
> always a positive number and displays on all  playtforms.
> 
> Possible different length of ints?  [mac is C2D so could be 64 bit ints?]
> 
> To confirm this 0x7FFFFFFF will display on the mac.

After looking at this it appears to be a problem with the toloa++ wrapper over the JiveSurface. This casts everything via a double, and the casting does not work correctly on osx.

The solution is to rewrite the JiveSurface lua binging using the native lua/C interface (I was planning on removing tolua++ at some stage anyway).