The READ_XWD function reads the contents of a file created by the
xwd (X Windows Dump) command and returns the image and color table vectors in the form of IDL variables.
xwdversion 6 or later.
This routine is written in the IDL language. Its source code can be found in the file
read_xwd.pro in the
lib subdirectory of the IDL distribution.
Result = READ_XWD( Filename[, R, G, B] )
READ_XWD returns a 2-D byte array containing the image. If the file cannot be open or read, the return value is zero.
A scalar string specifying the full pathname of the XWD file to read.
Named variables that will contain the Red, Green, and Blue color vectors, if the XWD file contains color tables.
To open and read the X Windows Dump file named
my.xwd in the current directory, store the image in the variable
image1, and store the color vectors in the variables,
image1 = READ_XWD('my.xwd', R, G, B)
To load the new color table and display the image, enter:
TVLCT, R, G, B TV, image1
Introduced: Pre 4.0