The format of the string data used in the imageop module is described
as "This is the same format as used by gl.lrectwrite() and the imgfile
module." This implies a certain byte order in multi-byte pixel
formats. However, the code was originally written on an SGI
(big-endian) and *uses* the fact that bytes are stored in a particular
order in ints. This means that the code uses and produces different
byte order on little-endian systems.
This fix adds a module-level flag "backward_compatible" (default not
set, and if not set, behaves as if set to 1--i.e. backward compatible)
that can be used on a little-endian system to use the same byte order
as the SGI. Using this flag it is then possible to prepare
SGI-compatible images on a little-endian system.
This patch is the result of a (small) discussion on python-dev and was
submitted to SourceForge as patch #874358.
2 files changed