1GIFBG(1)                     GIFLIB Documentation                     GIFBG(1)
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NAME

6       gifbg - generate a test-pattern GIF
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SYNOPSIS

9       gifbg [-v] [-d dir] [-l lvls] [-c R G B] [-m min] [-o max] [-s w h]
10             [-h]
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DESCRIPTION

13       A program to generate a single-color test pattern GIF with gradually
14       changing intensity in any of the basic 8 directions.
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16       The gifbg program reads no input, and will dump the created GIF file to
17       stdout.
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OPTIONS

20       -v
21           Verbose mode (show progress). Enables printout of running scan
22           lines.
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24       -d dir
25           Select direction the intensity of the background should increase.
26           Direction can be one of the 8 principal directions:
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28           "T"
29               for Top
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31           "TR"
32               for Top Right
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34           "R"
35               for Right
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37           "BR"
38               for Bottom Right
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40           "B"
41               for Bottom
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43           "BL"
44               for Bottom Left
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46           "L"
47               for left
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49           "TL"
50               for Top Left
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52           The compass directions may be use as synonyms for the above
53           directions, so for example "NE" is equal to "TR".
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55           Direction is case insensitive. The default direction is Top
56           (North).
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58       -l lvls
59           Numeric, nmber of levels the color will be scaled to. Default is
60           16.
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62       -c R G B
63           What to use as the primary background color to scale. This color is
64           scaled between the minimum intensity (min) and maximum intensity
65           (max) from one end of the screen to the other as defined by dir.
66           See below (-m & -M) for min & max. Default is Blue (0, 0, 255).
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68       -m min
69           Minimum intensity (in percent) to scale color. Default 10%
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71       [-M max
72           Maximum intensity (in percent) to scale color. Default 100%
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74       -s W H
75           Size of image to create. Default 640 by 350.
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77       -h
78           Print one line of command line help, similar to Usage above.
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80       If min == max = 100 (%) and lvls == 2 then boolean mask image of
81       specified size will be created - all foreground.
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AUTHOR

84       Gershon Elber.
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88GIFLIB                            2 May 2012                          GIFBG(1)