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.
Note: This function is intended to be used only on files containing 8-bit pixmaps created with xwd version 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.
None
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, R, G, and B, enter:
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
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Pre-4.0 |
Introduced |