Could you also explain to me how the trasformation image binary file ->
waveform and back happens? As I understand an image is roughly a set of
pixels each with its own color. There is also a header (which we don't
need?) Then we read the file and forward every byte into the waveform
record which is of type unsigned char (integers 0-255) with a size =
1byte. So in order to get an image out of the waveform we should break
the waveform N times with an interval M (if our image dimensions are
N*M). There is also a Color map which specifies what color our integers
equal to.
Now when we want to convert our waveform back to file we are using the
chr(x) function, I don't know why.
Next thing as you mentioned is the NELM field and
EPICS_CA_MAX_ARRAY_BYTE variable. So if our image is say 400*300 24 bit
BMP image, does it mean we should set NELM=400*300 and
EPICS_CA_MAX_ARRAY_BYTE=400*300*24?
I would be grateful to hear your comments.
Thank you.
Pavel
