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- bbbbggggggggeeeennnn((((llll)))) UUUUNNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV bbbbggggggggeeeennnn((((llll))))
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- NNNNAAAAMMMMEEEE
- bggen - generates colored backgrounds on X11 displays
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- SSSSYYYYNNNNTTTTAAAAXXXX
- bbbbggggggggeeeennnn [-w width] [-s size] [-b bits] r1 g1 b1 [r2 g2 b2 ...
- rn gn bn]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- bbbbggggggggeeeennnn is a program that generates a width-pixel wide by
- size-pixels high vertical stripe. The top of the stripe is
- in color (r1,g1,b1), and the bottom of the stripe is in
- color (rn,gn,bn). Intermediate colors are interpolated
- between these colors. If you specify more than 2 colors,
- the stripe passes through all the specified colors, in the
- order specified.
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- The '-b' option specifies the number of significant bits in
- the (output) color specifications. It must range between 1
- and 8, inclusive. Use values less than 8 (the default) to
- limit color use by increasing the color granularity.
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- Values for 'r', 'g', and 'b' should range between 0 and 255,
- inclusive. 0 means 'off', and 255 means 'fully on'.
-
- bbbbggggggggeeeennnn doesn't actually affect your background directly.
- bbbbggggggggeeeennnn merely generates a small PPM (Portable Pixmap Format)
- datafile that XV can read and display.
-
- To use bbbbggggggggeeeennnn, you should pipe its output into an XV command,
- such as: "xv -root -quit -slow24"
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- The default 'size' is 1024 pixels, which should be as tall
- as your display. If your display is taller than that, you
- should specify its actual height, otherwise you will get a
- bizarre repeating effect, that you probably didn't want.
- Note: If you specify small values of '-s', you can get some
- neat effects.
-
- The '-w' argument has been added to improve the performance
- of various stippling algorithms (as in XV). More
- information to work with, and such. Try using '-w 16' on
- these command lines to see what is meant.
-
- TTTTRRRRYYYY TTTTHHHHEEEESSSSEEEE
- Light Blue to Dark Blue
- bggen 100 100 255 50 50 150 | xv -ro -q -slow24 -
- RGB Rainbow
- bggen 0 0 255 0 255 0 255 0 0 | xv -ro -q -slow24 -
- Green Cylinders
- bggen 0 0 0 0 255 0 0 0 0 -s 128 | xv -ro -q -slow24 -
- Blue to Magenta
- bggen 0 0 255 200 0 100 | xv -ro -q -slow24 -
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- Page 1 (printed 3/16/94)
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- bbbbggggggggeeeennnn((((llll)))) UUUUNNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV bbbbggggggggeeeennnn((((llll))))
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- Full Rainbow
- bggen 0 0 255 0 255 255 0 255 0 255 255 0 255 0 0 | xv -ro -q -slow24 -
- Repeating Rainbow
- bggen 0 0 255 0 255 255 0 255 0 255 255 0 255 0 0
- 255 0 255 0 0 255 -s 256 | xv -ro -q -slow24 -
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- It'd probably be nice if the program used some X calls to
- determine screen size. It'd also probably be nice if the
- program could take colors by 'name', and also by hexadecimal
- value.
-
- AAAAUUUUTTTTHHHHOOOORRRR
- John Bradley - bradley@cis.upenn.edu
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- Page 2 (printed 3/16/94)
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