[Bf-committers] Updated cineon/dpx patch

[Joe Eagar]

Hi, I've updated the cineon/dpx patch to support both exporting and 
importing of cineon/dpx files (including making sure Play Anim worked).  
I've also changed the button in the fileselector so it displays "Save 
Cineon" or "Save DPX" instead of defaulting to "Save Targa.  Patch at 
https://projects.blender.org/tracker/index.php?func=detail&aid=3972&group_id=9&atid=127

The next step is probably going to be corresponding with the cinepaint 
people, asking them if theres any flaws in the way the library saves dpx 
(especially the question of whether or not it's possible to make it save 
full 16-bits-per-channel non-log.  here's a question, does the HD tape 
even support 16-bit-per-channel non-log?).  It's a little confusing 
because the dpx specs I found weren't exactly 100% clear on this.

For loading from memory buffers, I added a wrapper around the three file 
reading functions used by the cinepaint library (fread, fwrite (although 
it doesn't do anything if in memory buffer mode), and fseek).  They're 
called logimage_f*** and I put them in a new file, logmemfile.c (with 
prototypes in logmemfile.h) in the imbuf/cineon folder.

joeedh