Ok, one detail in your post rings a bell. I'm actually calling write_tile without any stride parameter, thinking my previous calls to copy_image would have written data correctly in the buffer. I'll check if setting the stride manually solves my issue.
I'm still confused by the fact that the two plugins does not have the same behavior. 2013/10/11 Larry Gritz <[email protected]> > Which one seems to be working properly and which is broken? > > Is there a specific resolution that can reproduce the problem? > > From the *app's* point of view, it shouldn't matter. The app is calling > write_tile with strides, which can let it easily specify whether it's a > buffer the full size of an ordinary tile, or if the buffer is truly the > size of a partial tile. > > The plugin is then responsible for rearranging the data, if necessary, > before passing on to the underlying format-writing library (libtiff or > libIlmImf). It's entirely possible that one of these is not doing that > properly, though it would be slightly surprising to me because I don't > recall having any errors reported related to this, and we use both file > types. > > -- lg > > > On Oct 11, 2013, at 8:38 AM, Michel Lerenard wrote: > > > Hi, > > > > i've stumbled across a serious issue while saving images. I'm using the > write_tile function to write data in the image, and the function does not > have the same behavior in Tiff and EXR plugins when writing the bottom and > left border tiles, whose height and width can be truncated to respect the > image size. > > > > The tiff plugin requires a buffer which covers a complete tile (ie > spec.tilewidth*spec.tileheight*spec.channels) => non contiguous data on > partially used border tiles. > > the exr plugin requires a buffer which covers the exact size of the > current tile. => contiguous data on all tiles > > > > > > I need to have format specific code to arrange data so its works, using > OIIO::copy_image. Is it intended, or is it a bug ? > > > > Michel > > > > -- > Larry Gritz > [email protected] > > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >
_______________________________________________ Oiio-dev mailing list [email protected] http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
