1Infotopam User Manual(0) Infotopam User Manual(0)
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6 infotopam - convert Amiga .info icons to PAM
7
10 infotopam [-forcecolor] [-numcolors numcolors] [-selected] [index color
11 ...] [filename]
12 Minimum unique abbreviation of option is acceptable. You may use dou‐
15 ble hyphens instead of single hyphen to denote options. You may use
16 white space in place of the equals sign to separate an option name from
17 its value.
18
21 By default, infotopam converts the first icon in a .info file:
22 infotopam amiga.info > amiga.first.pam
24 Use the -selected option to convert the second icon in a .info file.
26 Here infotopam reads from Standard Input:
27 infotopam -selected < amiga.info > amiga.second.pam
29 Use the -forcecolor option to force color conversion for a 1 bit-plane
31 .info file:
32 infotopam -forcecolor bw.info > bw.pam
34 Use -numcolors to override colors for indexes 0 and 3. Notice the two
36 ways to specify the color:
37 infotopam -numcolors 2 0 green 3 #FF0000 icon.info > icon.pam
39 Since Amiga monitors do not use square pixels, some icons may appear
41 squished. Filtering the output through pamscale can fix this:
42 infotopam squish.info | pamtopnm | pamscale -yscale 1.7 > normal.pnm
44
47 This program is part of Netpbm(1).
48 infotopam converts an Amiga .info (icon) file to a PAM image. info‐
50 topam reads a .info file from filename, or from Standard Input if you
51 do not specify a file name, and writes the converted PAM image to Stan‐
52 dard Output.
53 infotopam currently handles 1 and 2 bit-plane icons. If the .info icon
55 only has 1 bit-plane, infotopam generates a bitmap (black&white) PAM
56 image; otherwise it generates a color PAM image. You can force info‐
57 topam to convert 1 bit-plane images to color PAM images by using the
58 -forcecolor option.
59
62 -forcecolor
63 Forces infotopam to convert 1 bit-plane icons to color PAM
67 images instead of bitmap PAM images. infotopam uses the index
68 2
69 color for black and the index 1 color for white (more on this
70 below).
71 -numcolors numcolors
74 Tells infotopam how many colors to override. Pixels in the
78 Amiga .info files are assigned an index value rather than a
79 specific color.
80 The standard colors for a 2 bit-plane icon are:
81 Index 0: Blue (00, 55, AA)
83 Index 1: White (FF, FF, FF)
84 Index 2: Black (00, 00, 20)
85 Index 3: Orange (FF, 8A, 00)
86 To override the colors, first specify how many colors to over‐
88 ride using
89 -numcolors, then specify an (index color) pair for each color
90 you want to override, where index is a value from 0 to 3 and
91 color the the new color for that index. Specify color as
92 described for the ppm_parsecolor() argument
93 ⟨libppm.html#colorname⟩ .
94 -selected
97 Tells infotopam to convert the selected (second) icon instead of
100 the normal (first) icon. Each Amiga .info icon file contains
101 two icon
102 images. The first image is the normal, unselected icon, and
103 the second
104 image is the selected icon. By default infotopam converts the
105 first
106 icon. You can tell infotopam to convert the second icon by
107 using the
108 -selected option.
109 All options can be abbreviated to their shortest unique prefix.
113
116 pam(1) pamtopnm(1) pamscale(1)
117
121 Thanks to the following people on comp.sys.amiga.programmer for tips
122 and pointers on decoding the info file format:
123 · Ben Hutchings
127 · Thomas Richter
129 · Kjetil Svalastog Matheussen
131 · Anders Melchiorsen
133 · Dirk Stoecker
135 · Ronald V.D.
137 The format of the Amiga .info file is as follows:
140 DiskObject header 78 bytes
142 Optional DrawerData header 56 bytes
143 First icon header 20 bytes
144 First icon data Varies
145 Second icon header 20 bytes
146 Second icon data Varies
147 The DiskObject header contains, among other things, the magic number
149 (0xE310), the object width and height (inside the embedded Gadget
150 header), and the version.
151 Each icon header contains the icon width and height, which can be
153 smaller than the object width and height, and the number of bit-planes.
154 The icon data has the following format:
156 BIT-PLANE planes, each with HEIGHT rows of (WIDTH
160 +15) / 16 * 2 bytes length.
161 So if you have a 9x3x2 icon, the icon data will look like this:
163 aaaa aaaa a000 0000
165 aaaa aaaa a000 0000
166 aaaa aaaa a000 0000
167 bbbb bbbb b000 0000
168 bbbb bbbb b000 0000
169 bbbb bbbb b000 0000
170 where a is a bit for the first bit-plane, b is a bit for the second
172 bit-plane, and 0 is padding. Thanks again to Ben Hutchings for his
173 very helpful post!
174
177 infotopam was new in Netpbm 10.22 (April 2004).
178
181 infotopam currently only handles 1 and 2 bit-plane icons.
182 There is no pamtoinfo command, since the .info files contain a lot more
184 than just icon data, and mapping the colors would be difficult.
185
188 Copyright (C) 2000, 2004 by Richard Griswold.
189netpbm documentation 07 April 2004 Infotopam User Manual(0)