Commit fc528e27 authored by Brian Paul's avatar Brian Paul

added info about S3TC texture compression

parent 1fdfd54b
......@@ -7,7 +7,7 @@
<center>
<h1>Mesa Frequently Asked Questions</h1>
Last updated: 26 November 2003
Last updated: 31 December 2003
</center>
<br>
......@@ -203,8 +203,8 @@ package and unpack it before compiling Mesa.
<h2><a name="part2">2.6 What's the proper place for the libraries and headers?</a></h2>
<p>
<a name="part2">On Linux-based systems you'll want to follow the
</a><a href="http://oss.sgi.com/projects/ogl-sample/ABI/index.html">Linux ABI</a>
standard.
</a><a href="http://oss.sgi.com/projects/ogl-sample/ABI/index.html"
target="_parent">Linux ABI</a> standard.
Basically you'll want the following:
</p>
<ul>
......@@ -260,7 +260,7 @@ hardware it has detected.
</a></p>
<p>
<a name="part3">If your DRI-based driver isn't working, go to the
</a><a href="http://dri.sf.net/">DRI website</a> for trouble-shooting information.
</a><a href="http://dri.sf.net/" target="_parent">DRI website</a> for trouble-shooting information.
</p>
......@@ -268,7 +268,8 @@ hardware it has detected.
<p>
Make sure the ratio of the far to near clipping planes isn't too great.
Look
<a href="http://www.sgi.com/software/opengl/advanced97/notes/node18.html">
<a href="http://www.sgi.com/software/opengl/advanced97/notes/node18.html"
target="_parent">
here</a> for details.
</p>
<p>
......@@ -324,7 +325,7 @@ will fix the problem.
is discussed.
</a></p>
<p>
<a name="part4">The </a><a href="http://www.opengl.org/developers/documentation/specs.html">
<a name="part4">The </a><a href="http://www.opengl.org/developers/documentation/specs.html" target="_parent">
OpenGL Specification</a> is the bible for OpenGL implemention work.
You should read it.
</p>
......@@ -356,5 +357,22 @@ the archives) is a good way to get information.
</p>
<h2>4.3 Why isn't GL_EXT_texture_compression_s3tc implemented in Mesa and/or the DRI drivers?</h2>
<p>
The <a href="http://oss.sgi.com/projects/ogl-sample/registry/EXT/texture_compression_s3tc.txt" target="_parent">specification for the extension</a>
indicates that there are intellectual property (IP) and/or patent issues
to be dealt with.
</p>
<p>We've been unsucessful in getting a response from S3 (or whoever owns
the IP nowadays) to indicate whether or not an open source project can
implement the extension (specifically the compression/decompression
algorithms).
</p>
<p>
Until we can get official permission to do so, this extension will not
be implemented in Mesa.
</p>
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