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Top Forums UNIX for Advanced & Expert Users console /dev/console get image Post 302316491 by sreyes27 on Friday 15th of May 2009 09:24:15 AM
Old 05-15-2009
Question console /dev/console get image

We are using software (Pegasys) which runs on SunOS 5.8 and reads images from a Philips nuclear camera. The software is designed to run from the console. I need to be able to capture the images it produces on the display. The caveat is that I cannot use the X Windows display because the X Server is not producing the images and therefore has no knowledge of the image. I've tried doing a display dump (xwd) and displaying the image I captured (xwud) but the image is blank (black). I have learned that the application is most likely using 'Direct Graphics Access' and so my dumps I've taken prove that that is the case and cannot go that route. I was hoping to find some way of getting the image being display by taking a pixel-by-pixel dump of the screen. I'm not sure, other than writing an application to reads the framebuffer (/dev/fb) and then dumping the image (somehow) from there? Extremely delicate scenario if not impossible. What other options do you recommend?

Thank you,
~Sreyes27
Smilie
 

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xwud(1X)																  xwud(1X)

NAME
xwud - image displayer for X SYNOPSIS
xwud [-in file] [-noclick] [-geometry geom] [-display display] [-new] [-std <maptype>] [-raw] [-vis <vis-type-or-id>] [-help] [-rv] [-plane number] [-fg color] [-bg color] OPTIONS
If a bitmap image (or a single plane of an image) is displayed, this option can be used to specify the color to display for the 0 bits in the image. This option allows you to specify the server to connect to; see X(1X). If a bitmap image (or a single plane of an image) is displayed, this option can be used to specify the color to display for the 1 bits in the image. This option allows you to specify the size and position of the window. Typically you will only want to specify the position, and let the size default to the actual size of the image. Print out a short description of the allowable options. This option allows the user to explicitly specify the input file on the command line. If no input file is given, the standard input is assumed. This option forces creation of a new colormap for displaying the image. If the image characteristics happen to match those of the display, this can get the image on the screen faster, but at the cost of using a new colormap (which on most displays will cause other windows to go technicolor). Clicking any button in the window will terminate the application, unless this option is specified. Termination can always be achieved by typing 'q', 'Q', or ctrl-c. You can select a single bit plane of the image to display with this option. Planes are numbered with zero being the least significant bit. This option can be used to figure out which plane to pass to xpr(1X) for printing. This option forces the image to be displayed with whatever color values happen to currently exist on the screen. This option is mostly useful when undumping an image back onto the same screen that the image originally came from, while the original windows are still on the screen, and results in getting the image on the screen faster. If a bit- map image (or a single plane of an image) is displayed, this option forces the foreground and background colors to be swapped. This may be needed when displaying a bitmap image which has the color sense of pixel values 0 and 1 reversed from what they are on your display. This option causes the image to be displayed using the specified Standard Colormap. The property name is obtained by converting the type to upper case, prepending RGB_, and appending _MAP. Typical types are best, default, and gray. See xstdcmap(1X) for one way of creating Stan- dard Colormaps. This option allows you to specify a particular visual or visual class. The default is to pick the "best" one. A particu- lar class can be specified: StaticGray, GrayScale, StaticColor, PseudoColor, DirectColor, or TrueColor. Or Match can be specified, meaning use the same class as the source image. Alternatively, an exact visual id (specific to the server) can be specified, either as a hexadeci- mal number (prefixed with 0x) or as a decimal number. Finally, default can be specified, meaning to use the same class as the colormap of the root window. Case is not significant in any of these strings. DESCRIPTION
The xwud program is an X Window System image undumping utility. xwud allows X users to display in a window an image saved in a specially formatted dump file, such as produced by xwd(1X). ENVIRONMENT
To get default display. FILES
X Window Dump File format definition file. SEE ALSO
xwd(1X), xpr(1X), xstdcmap(1X), X(1X) AUTHOR
Bob Scheifler, MIT X Consortium xwud(1X)
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