Hello,
I've sent an email about this before but I think my reply got lost somewhere.
Anyway, I am trying to crop a multi-image Exr file.
I have managed to write out the multi-image like this (because
out->supports("appendsubimage") returns false)
out->open (filename.toStdString(), orig_fb_count, specs);
// Write the individual subimages
unsigned int xoffset = 0;
for (int s = 0; s < orig_fb_count; s++) {
if (s > 0) { // Not needed for the first, which is already open
out->open (filename.toStdString(), specs[s],
ImageOutput::AppendSubimage);
}
out->write_image (TypeDesc::BASETYPE(specs[s].format.basetype), scratch +
xoffset);
xoffset += specs[s].image_bytes();
}
Here the scratch is a scratch file buffer storing all the aovs contiguously,
and the arrap of specs stores the spec for each one. This is working great, but
I want to add an autocrop feature.
I can calculate the ROI (or BBox) for the overall image, but I am not sure how
to crop the images.
The original code I inherited uses ImageBufAlgo::crop, and then ImageBuf::write
to save the file. I am not sure how to write out the result from the crop to a
multi-image EXR
out->open (filename.toStdString(), orig_fb_count, specs);
What's the correct method to crop the image and write it out as a multi-image
EXR?
SVEN STEINBAUER
Senior R&D Engineer
T +44 20 7287 4041
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