carm@umd5.umd.edu (Rick Chimera) (08/30/89)
Is anyone out there familiar with what one would need to do in order to have the X Window System be able to display video images from the Targa 16 (or similar) board ? I have been able to track down a generic Unix SysV driver for the Targa board, and now I have to figure out whether it is possible to have that driver interact with X in a nice way to have things work "as one would naturally expect." Or perhaps some ideas on how I would have to modify such a generic driver to have it work thusly with X. Some of my questions include: -How does one put the targa controlled image into an X window? -When I resize, do I clip and get empty spaces if I resize such that the window is not exactly the same size as the default targa image or can the targa image be scaled as well? -Will X be able to obscure the targa window if another window is brought on top of the targa window or does targa do nasty hardware/monitor things that X won't be able to override or handle "normally"? Typical answers I might expect would be: "It's straightforward, here's how..", "the targa image is one size and not scalable so clipping and empty spaces will occur if you don't control the size of the X window explicitly by the program", and "Since it's in an X window per question one, of course things get handled normally". Any comment/help large or small would be greatly appreciated. Persons with similar interests but no answers are also welcome to send me a note. Rick Chimera
pusateri@romeo.cs.duke.edu (Thomas J. Pusateri) (09/01/89)
In article <5284@umd5.umd.edu> carm@umd5.umd.edu (Rick Chimera) writes: >Is anyone out there familiar with what one would need to do in order >to have the X Window System be able to display video images from the >Targa 16 (or similar) board ? There is a package called the utah raster toolkit that will convert from targa to their rle format. Then you also need the Fuzzy bitmap package and through an unobvious process of separating the RGB components and and then using the fbm rawtofbm converter you can then convert to gif. There is a xgif program for displaying gif images under the X window system. Alternatively, you can convert from fuzzy bit map to portable bit map and then using Jeff Pozankers PBM package, you can convert to x bitmaps. Overall, the process is quite painstaking however, if you obtain these packages mentioned above, you can convert to most formats. Of course, there is a TIFF package from CMU that is nice to have if you are needing to convert to or from this format. Since the step above to convert from rle to fbm is not obvious, I will include c shell script to do so. FBM was recently posted to comp.sources.unix PBM is included in the X windows distributioin and is also obtainable for anon ftp from expo.lcs.mit.edu UTAH RASTER TOOLKIT (RLE) is available for anon ftp from wsmr-simtel20.army.mil ----------------- rle2fbm---------cut here------------------------------- #!/bin/csh if ($#argv != 3) then echo "Usage: rle2fbm image width height" else repos $1.rle | rleflip -v | rletogray -p $1 cat $1.red $1.green $1.blue > $1.rgb rm -f $1.alpha $1.red $1.green $1.blue raw2fbm -d3 -a1.0 -w$2 -h$3 < $1.rgb > $1.fbm rm -f $1.rgb endif -------------------------------------------------------------------------- Tom Pusateri National Biomedical Simulation Resource Duke University Medical Center pusateri@nbsr.mc.duke.edu
pokey@well.UUCP (Jef Poskanzer) (09/02/89)
In the referenced message, pusateri@romeo.UUCP (Thomas J. Pusateri) wrote:
[amazingly complicated conversion procedure deleted]
Yow, I had no idea things were so bad. You'll probably be happy to
find out that I have just added a Targa reader to the new color-capable
PBM. Also, this is the only Targa reader I know of that handles the
entire Targa spec (except for the undocumented types 32 and 33 Huffman
encoded files).
As for when the new PBM will be distributed, it's still Real Soon Now.
---
Jef
Jef Poskanzer pokey@well.sf.ca.us {ucbvax, apple, hplabs}!well!pokey
Fools rush in and get the best seats.