1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
PNG.txt for Tux Paint
Tux Paint - A simple drawing program for children.
Copyright 2002-2007 by Bill Kendrick and others
bill@newbreedsoftware.com
http://www.tuxpaint.org/
June 27, 2002 - June 19, 2007
$Id: PNG.txt,v 1.6 2007/06/19 20:21:54 wkendrick Exp $
About PNGs
----------
PNG is the Portable Network Graphic format. It is an open standard,
not burdened by patents (like GIFs). It is a highly compressed format
(though not "lossy" like JPEGs - lossiness allows files to be much
smaller, but introduces 'mistakes' in the image when saved), and
supports 24-bit color (16.7 million colors) as well as a full
"alpha channel" - that is, each pixel can have a varying degree of
transparency.
For more information, visit: http://www.libpng.org/
These features (openness, losslessness, compression, transparency/alpha)
make it the best choice for Tux Paint. (Tux Paint's support for the PNG
format comes from the Open Source SDL_Image library, which in turn gets
it from the libPNG library.)
Support for many colors allows photo-quality "rubber stamp" images to
be used in Tux Paint, and alpha transparency allows for high-quality
"paint brushes."
How To Make PNGs
----------------
The following is a very _brief_ list of ways to create PNGs or
convert existing images into PNGs.
Linux/Unix Users
----------------
The GIMP
--------
The best tool with which to create PNG images for use in Tux Paint is
the GNU Image Manipulation Program ("The GIMP"), a high-quality
Open Source interactive drawing and photo editing program.
It's probably already installed on your Linux system. If not, it's
almost definitely available on the install CD or from your
distribution's download site. Otherwise:
http://www.gimp.org/
Krita
-----
Krita is a painting and image editing application for KOffice.
http://koffice.kde.org/krita/
NetPBM
------
The Portable Bitmap tools (collectively known as "NetPBM") is a
collection of Open Source command-line tools which convert to and from
various formats, including GIF, TIFF, BMP, PNG, and many more.
NOTE: The NetPBM formats (Portable Bitmap: PBM,
Portable Greymap: PGM, Portable Pixmap: PPM, and the catch-all
Portable Any Map: PNM) do not support alpha, so any transparency
information (e.g. from within a GIF) will be lost! Use The GIMP!
It's probably already installed on your Linux system. If not, it's
almost definitely available on the install CD or from your
distribution's download site. Otherwise:
http://netpbm.sourceforge.net/
cjpeg/djpeg
-----------
The "cjpeg" and "djpeg" command-line programs convert between
the NetPBM Portable Any Map (PNM) format and JPEGs.
It's probably already installed on your Linux system.
(Under Debian, this is available in the package "libjpeg-progs".)
If not, it's almost definitely available on the install CD or from
your distribution's download site. Otherwise:
ftp://ftp.uu.net/graphics/jpeg/
Windows Users
-------------
The Gimp
http://www.gimp.org/~tml/gimp/win32/
Canvas (Deneba)
http://www.deneba.com/products/canvas8/default2.html
CorelDRAW (Corel)
http://www.corel.com/
Fireworks (Macromedia)
http://macromedia.com/software/fireworks/
Illustrator (Adobe)
http://www.adobe.com/products/illustrator/main.html
Paint Shop Pro (Jasc)
http://www.jasc.com/products/psp/
Photoshop (Adobe)
http://www.adobe.com/products/photoshop/main.html
PIXresizer (Bluefive software)
http://bluefive.pair.com/pixresizer.htm
Macintosh Users
---------------
Canvas (Deneba)
http://www.deneba.com/products/canvas8/default2.html
CorelDRAW (Corel)
http://www.corel.com/
Fireworks (Macromedia)
http://macromedia.com/software/fireworks/
GraphicConverter (Lemke Software)
http://www.lemkesoft.de/us_gcabout.html
Illustrator (Adobe)
http://www.adobe.com/products/illustrator/main.html
Photoshop (Adobe)
http://www.adobe.com/products/photoshop/main.html
More Info.
----------
The libPNG website lists image editors and image converts that
support the PNG format:
http://www.libpng.org/pub/png/pngaped.html
http://www.libpng.org/pub/png/pngapcv.html
|
