/usr/share/dx/samples/data/image.general is in dxsamples 4.4.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # this is an example header file which will allow importation of the data
# contained in "cylinder.rgb". Compare this header to the dx header file
# image.dx. You can read in this image, and display it, using the
# visual program ReadImage.net.
#
#
# The data are found in the file "cylinder.rgb"
file = cylinder.rgb
#
# The grid is 350x300 (pixels)
grid = 350x300
#
# The data values in the file are bytes
type = byte
#
# the data component contains the colors, which are 3-vectors
structure = 3-vector
#
# the following line specifies that the data are organized such that the
# first index (in this case x) varies fastest when reading the data.
majority = column
#
# The data is stored in binary format
format = msb binary
#
# here we specify origin_x, delta_x, origin_y, delta_y
# Images are described from "top to bottom", hence the value of -1 for
# delta_y
positions = 0, 1, 0, -1
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