[Python-Dev] PEP: Adding data-type objects to Python
wbaxter at gmail.com
Wed Nov 1 02:58:41 CET 2006
One thing I'm curious about in the ctypes vs this PEP debate is the following.
How do the approaches differ in practice if I'm developing a library that wants
to accept various image formats that all describe the same thing: rgb data.
Let's say for now all I want to support is two different image formats whose
pixels are described in C structs by:
unsigned short r:5;
unsigned short g:6;
unsigned short b:5;
unsigned int r:10;
unsigned int g:12;
unsigned int b:10;
Basically in my code I want to be able to take the binary data descriptor and
say "give me the 'r' field of this pixel as an integer".
Is either one (the PEP or c-types) clearly easier to use in this case? What
would the code look like for handling both formats generically?
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