Hello all,
I'm trying to combine some deep exrs together and I'm having problem with
IlmThread so I thought that I'd check that what I'm doing is valid.
I have multiple scanline "tile" images that each form a part of the final
image. For example this output image is formed of 4 smaller images.
--------
|A | B |
--------
|C | D |
--------
A, B, C, and D are all deep scanline exrs. Their data windows do not overlap.
I'm trying to combine these images together into the final image by sharing a
framebuffer between all of the input images and the output image, to avoid
having to copy from each input file into an intermediate buffer.
So in pseudo code this looks like:
foreach data_window.scanlines
foreach input_files
input_file.readPixelSampleCounts(scanline)
end
resizeSampleBuffers(sample_counts, buffers, sample_buffers)
foreach input_files
input_file.readPixels(scanline)
end
output_file.writePixels(1)
end
Is it valid to share frame buffers in this way for deep images? I'm doing
something similar for regular scanline images and I'm having no issues. For
deep images though I get an assertion error from IlmThread while reading the
pixels of tile B (I'm guessing due to it being the same scanline as A) because
one of the mutexes on a TaskGroup is getting destroyed while still being used.
Thanks,
Ashley
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