Based on a Github thread, I think this message may have slipped through the cracks, so I'm just pinging it again to see if anyone has any thoughts.
Thanks, -Nathan From: Nathan Rusch Sent: Thursday, October 02, 2014 3:01 PM To: OpenImageIO developers Subject: Cusotm channel names not working with make_texture Hey all, I'm trying to set custom channel names when creating a .tx file, but it seems that I'm particular feature either may not work correctly, or that I'm overlooking something. This is using OIIO 1.5.0. The first thing I tried was setting the "maketx:channelnames" attribute on my output ImageSpec to a comma-separated string (e.g. "R,G,B,A,Z,mask")., but when I inspect the file using iinfo, it lists the channels as "R, G, B, A, channel4, channel5". I also tried manually populating the `.channelnames` vector on the destination ImageSpec, as well as the `spec.alpha_channel` and `spec.z_channel` indices, but this didn't seem to work either. Lastly, since my code is passing a filled ImageBuf to ImageBufAlgo::make_texture, I tried the manual population process again, except on the ImageSpec that is passed to the constructor of the ImageBuf I'm populating to be written (since it looked like make_texture_impl could potentially allow the source ImageBuf to be written directly). Then, just to sanity-check myself, I wrote out an EXR with the channels I wanted, and then converted it to a .tx file using `maketx --oiio --channelnames "R,G,B,A,Z,mask" /path/to/file.exr`, but iinfo still showed the last two channels as being named "channel4" and "channel5". I also wrote some code to read the same image back in and print out the contents of its channel names as seen by OIIO (to sanity-check iinfo), with the same results. My question is, is this A) a limitation of libtiff, B) a limitation of the OIIO tiffoutput plugin, C) an OIIO feature that hasn't been hooked up yet, D) a bug, or E) something else? Thanks for any help. -Nathan
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