Couldn't set the value of 'bytes_per_pixel' and it's value alway equal 0

[huyuhuster]

https://github.com/ufo-kit/ufo-filters/blob/d1abb276665ed3b6f59de2b6b0301b08f133115a/src/ufo-memory-in-task.c#L122

I intended to use the memory in mode to read the NumPy buffer just as the example given in UFO tasks docs:

from gi.repository import Ufo
import numpy as np
import tifffile

ref = np.random.random((512, 512)).astype(np.float32)

pm = Ufo.PluginManager()
g = Ufo.TaskGraph()
sched = Ufo.Scheduler()
read = pm.get_task('memory-in')
write = pm.get_task('write')

read.props.pointer = ref.__array_interface__['data'][0]
read.props.width = ref.shape[1]
read.props.height = ref.shape[0]
read.props.number = 1

write.props.filename = 'out.tif'

g.connect_nodes(read, write)
sched.run(g)

out = tifffile.imread('out.tif')
assert np.sum(out - ref) == 0.0

But I got a zero value 'out.tif'. Then I debug the code, I found the problem occur at the memcpy where I labeled it. The bytes_per_pixel‘s value equals 0. I try to set bytes_per_pixel‘s value in Python code by:

read.props.bytes_per_pixel = 4

but it doesn't work.

So I try to set it in C codes by hard coded :

priv->bytes_per_pixel = 4

and it works.

[matze]

The property is called bitdepth not bytes_per_pixel, so read.props.bitdepth = 32 should do the trick.