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‐
14 ble hyphens instead of single hyphen to denote options. You may use
15 white space in place of the equals sign to separate an option name from
16 its value.
17
20 By default, infotopam converts the first icon in a .info file:
21 infotopam amiga.info > amiga.first.pam
23 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
32 .info file:
33 infotopam -forcecolor bw.info > bw.pam
35 Use -numcolors to override colors for indexes 0 and 3. Notice the two
38 ways to specify the color:
39 infotopam -numcolors 2 0 green 3 #FF0000 icon.info > icon.pam
41 Since Amiga monitors do not use square pixels, some icons may appear
44 squished. Filtering the output through pamscale can fix this:
45 infotopam squish.info | pamtopnm | pamscale -yscale 1.7 > normal.pnm
47
51 This program is part of Netpbm(1).
52 infotopam converts an Amiga .info (icon) file to a PAM image. info‐
54 topam reads a .info file from filename, or from Standard Input if you
55 do not specify a file name, and writes the converted PAM image to Stan‐
56 dard Output.
57 infotopam currently handles 1 and 2 bit-plane icons. If the .info icon
59 only has 1 bit-plane, infotopam generates a bitmap (black&white) PAM
60 image; otherwise it generates a color PAM image. You can force info‐
61 topam to convert 1 bit-plane images to color PAM images by using the
62 -forcecolor option.
63
66 In addition to the options common to all programs based on libnetpbm
67 (most notably -quiet, see
68 Common Options ⟨index.html#commonoptions⟩ ), infotopam recognizes the
69 following command line options:
70 -forcecolor
74 Forces infotopam to convert 1 bit-plane icons to color PAM
78 images instead of bitmap PAM images. infotopam uses the index
79 2
80 color for black and the index 1 color for white (more on this
81 below).
82 -numcolors numcolors
85 Tells infotopam how many colors to override. Pixels in the
89 Amiga .info files are assigned an index value rather than a
90 specific color.
91 The standard colors for a 2 bit-plane icon are:
92 Index 0: Blue (00, 55, AA)
94 Index 1: White (FF, FF, FF)
95 Index 2: Black (00, 00, 20)
96 Index 3: Orange (FF, 8A, 00)
97 To override the colors, first specify how many colors to over‐
100 ride using
101 -numcolors, then specify an (index color) pair for each color
102 you want to override, where index is a value from 0 to 3 and
103 color the new color for that index. Specify color as
104 described for the pnm_parsecolor() argument
105 ⟨libnetpbm_image.html#colorname⟩ .
106 -selected
109 Tells infotopam to convert the selected (second) icon instead of
112 the normal (first) icon. Each Amiga .info icon file contains
113 two icon
114 images. The first image is the normal, unselected icon, and
115 the second
116 image is the selected icon. By default infotopam converts the
117 first
118 icon. You can tell infotopam to convert the second icon by
119 using the
120 -selected option.
121 All options can be abbreviated to their shortest unique prefix.
125
128 pam(1) pamtopnm(1) pamscale(1)
129
133 Thanks to the following people on comp.sys.amiga.programmer for tips
134 and pointers on decoding the info file format:
135 • Ben Hutchings
139 • Thomas Richter
141 • Kjetil Svalastog Matheussen
143 • Anders Melchiorsen
145 • Dirk Stoecker
147 • Ronald V.D.
149 The format of the Amiga .info file is as follows:
152 DiskObject header 78 bytes
154 Optional DrawerData header 56 bytes
155 First icon header 20 bytes
156 First icon data Varies
157 Second icon header 20 bytes
158 Second icon data Varies
159 The DiskObject header contains, among other things, the magic number
162 (0xE310), the object width and height (inside the embedded Gadget
163 header), and the version.
164 Each icon header contains the icon width and height, which can be
166 smaller than the object width and height, and the number of bit-planes.
167 The icon data has the following format:
169 BIT-PLANE planes, each with HEIGHT rows of (WIDTH
173 +15) / 16 * 2 bytes length.
174 So if you have a 9x3x2 icon, the icon data will look like this:
176 aaaa aaaa a000 0000
178 aaaa aaaa a000 0000
179 aaaa aaaa a000 0000
180 bbbb bbbb b000 0000
181 bbbb bbbb b000 0000
182 bbbb bbbb b000 0000
183 where a is a bit for the first bit-plane, b is a bit for the second
186 bit-plane, and 0 is padding. Thanks again to Ben Hutchings for his
187 very helpful post!
188
191 infotopam was new in Netpbm 10.22 (April 2004).
192
195 infotopam currently only handles 1 and 2 bit-plane icons.
196 There is no pamtoinfo command, since the .info files contain a lot more
198 than just icon data, and mapping the colors would be difficult.
199
202 Copyright (C) 2000, 2004 by Richard Griswold.
203
205 This manual page was generated by the Netpbm tool 'makeman' from HTML
206 source. The master documentation is at
207 http://netpbm.sourceforge.net/doc/infotopam.html
209netpbm documentation 07 April 2004 Infotopam User Manual(0)