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1 perry 1 ppmrainbow
2 !!!ppmrainbow
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 SEE ALSO
8 AUTHOR
9 ----
10 !!NAME
11
12
13 ppmrainbow - Generate a rainbow
14 !!SYNOPSIS
15
16
17 __ppmrainbow__ [[__-width=__''number'']
18 [[__-height=__''number'']
19 [[__-tmpdir=__''directory''] [[__-verbose__]
20 ''color'' ...
21
22
23 All options can be abbreviated to their shortest unique
24 prefix. You may use two hyphens instead of one to designate
25 an option. You may use either white space or equals signs
26 between an option name and its value.
27 !!DESCRIPTION
28
29
30 __ppmrainbow__ generates a PPM image that fades from one
31 color to another to another from left to right, like a
32 rainbow. The colors are those you specify on the command
33 line, in that order. The first color is added again on the
34 right end of the image.
35
36
37 If you want a vertical or other non-horizontal rainbow, run
38 the output through __pnmrotate__.
39
40
41 One use for such a rainbow is to compose it with another
42 image under an alpha mask in order to add a rainbow area to
43 another image. In fact, you can make rainbow-colored text by
44 using __pbmtext__, __pnmcomp__, and
45 __ppmrainbow__.
46 !!OPTIONS
47
48
49 __-width__ ''number''
50
51
52 The width in pixels of the output image.
53
54
55 Default is 600.
56
57
58 __-height__ ''number''
59
60
61 The height in pixels of the output image.
62
63
64 Default is 8.
65
66
67 __-tmpdir__
68
69
70 The directory specification of the directory
71 __ppmrainbow__ is to use for temporary
72 files.
73
74
75 Default is the value of the __TMPDIR__ environment
76 variable, or ''/tmp'' if __TMPDIR__ is not
77 set.
78
79
80 __-verbose__
81
82
83 Print the
84 ppmrainbow__ uses to create the
85 image.
86 !!SEE ALSO
87
88
89 ppmmake(1), pnmcomp(1), pbmtext(1),
90 ppmfade(1), ppm(5).
91 !!AUTHOR
92
93
94 Arjen Bax wrote __ppmrainbow__ in June 2001 and
95 contributed it to the Netpbm package. Bryan Henderson wrote
96 this man page in July 2001.
97 ----
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