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author | William Joye <wjoye@cfa.harvard.edu> | 2016-10-27 20:28:26 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2016-10-27 20:28:26 (GMT) |
commit | b184baa1234c2143e488d1796ae98afab118b891 (patch) | |
tree | 686b0a47b272296205c7fa2bc789f62a03d20df6 /tkimg/doc/index.htm | |
parent | f7560d0a451a793441216d76eb4d9475aab61740 (diff) | |
parent | 5aad878400425d3af44433a47c13824385689e1d (diff) | |
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Merge commit '5aad878400425d3af44433a47c13824385689e1d' as 'tkimg'
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diff --git a/tkimg/doc/index.htm b/tkimg/doc/index.htm new file mode 100644 index 0000000..c74378d --- /dev/null +++ b/tkimg/doc/index.htm @@ -0,0 +1,80 @@ +<?xml version="1.0" encoding="iso-8859-1"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> + <title>Img Documentation</title> + <meta http-equiv="Content-Type" content="text/html" /> +</head> + +<body> +<h1>Img Manual</h1> + +<table width="100%"> + <tbody> + <tr> + <td><a href="index.htm">Introduction</a></td> + <td><a href="install.htm">Installation</a></td> + <td><a href="formats.htm">Format handlers</a></td> + <td><a href="library.htm">External libraries</a></td> + </tr> + </tbody> +</table> + +<h3>Introduction</h3> + +<p>Img is a Tk extension, adding support for many other Image formats: BMP, +XBM, XPM, GIF (with transparency, but without LZW), PNG, JPEG, TIFF and +postscript. This version only works with Tcl/Tk 8.0 or higher (any patchlevel, +tested up to 8.4a1). If you are using Tk4.2 or lower, please stick with +Img1.1.4 (which is still available).</p> + +<p>Currently there are two identical source distributions:</p> + +<table width="100%"> + <tbody> + <tr> + <td width="10%"> </td> + <td><a + href="ftp://ftp.neosoft.com/pub/tcl/sorted/packages-8.0/graphics/img/1.2/img124.zip">img124.zip</a></td> + <td>(for Windows)</td> + <td>(about 1.8 Mb)</td> + </tr> + <tr> + <td> </td> + <td><a + href="ftp://ftp.neosoft.com/pub/tcl/sorted/packages-8.0/graphics/img/1.2/img1.2.4.tar.gz">img1.2.4.tar.gz</a></td> + <td>(for Unix)</td> + <td>(about 1.6 Mb)</td> + </tr> + </tbody> +</table> + +<p>And a binary distribution</p> + +<table width="100%"> + <tbody> + <tr> + <td width="10%"> </td> + <td><a + href="ftp://ftp.neosoft.com/pub/tcl/sorted/packages-8.0/graphics/img/1.2/img124.exe">img124.exe</a></td> + <td>(for Windows)</td> + <td>(about 800 kb)</td> + </tr> + <tr> + </tr> + </tbody> +</table> + +<p>If you want to write images to disk which contain transparency information +(e.g. GIF89 or PNG with alpha channel), you need at least Tk8.3.</p> + +<p>In stead of LZW the run-length encoding of Hutchison Avenue Software +Corporation is used, also known as miGIF compression. The miGIF compression +routines do not, strictly speaking, generate files conforming to the GIF spec, +since the image data is not LZW-compressed (this is the point: in order to +avoid transgression of the Unisys patent on the LZW algorithm.) However, +miGIF generates data streams that any reasonably sane LZW decompresser will +decompress to what we want.</p> +</body> +</html> |