relnotes-6.5.3.html revision 4099531a0af5717087dca993ba780ec98936c4fc 
1<HTML>
2
3<TITLE>Mesa Release Notes</TITLE>
4
5<head><link rel="stylesheet" type="text/css" href="mesa.css"></head>
6
7<BODY>
8
9<body bgcolor="#eeeeee">
10
11<H1>Mesa 6.5.3 Release Notes / April 26, 2007</H1>
12
13<p>
14Mesa 6.5.3 is a development release with many changes and new features.
15Mesa 7.0 is expected to follow shortly.
16</p>
17
18
19<h2>MD5 checksums</h2>
20<pre>
21TBD
22</pre>
23
24
25<h2>Shared library numbering</h2>
26<p>
27Mesa 6.5.3 supports the OpenGL 2.0/2.1 API.  However, the (unix)
28shared library version is still 1.5 (i.e. libGL.so.1.5.xxxxxx).
29Bumping the shared library version to 2.x would cause linking problems
30with existing OpenGL applications.  Since OpenGL 2.x is backward
31compatible with OpenGL 1.x the shared library version number doesn't
32have to be incremented (which would indicate an incompatible ABI).
33</p>
34<p>
35Other OpenGL vendors name their OpenGL 2.x libraries libGL.so.1.0.xxxxx
36for the same reason.
37</p>
38
39
40
41<h2>New features</h2>
42<ul>
43<li>OpenGL 2.0 and 2.1 API support.
44<li>Entirely new Shading Language code generator.  See the
45<a href="shading.html">Shading Language</a> page for more information.
46<li>Much faster software execution of vertex, fragment shaders.
47<li>New vertex buffer object (vbo) infrastructure
48<li>Updated glext.h file (version 39)
49<li>Updated glxext.h file (version 19)
50<li>GL_MAX_DRAWBUFFERS is now 4 (software rendering) so
51    "multiple render targets" are really supported.
52</ul>
53
54<h2>Bug fixes</h2>
55<ul>
56<li>Fog was errantly applied when a fragment shader was enabled (bug 9346)
57<li>glPush/PopClientAttrib didn't handle VBO bindings correctly (bug 9445)
58<li>With 32-bit Z buffer, the fragment Z of lines and points was sometimes wrong.
59<li>GL_POST_CONVOLUTION_ALPHA_BIAS/SCALE was broken.
60<li>1D convolution state could effect 2D image transfers
61<li>Overlapping glCopyPixels with negative Y zoom didn't work (bug 10521)
62<li>Fixed a number of framebuffer/renderbuffer reference counting bugs
63<li>Fixed a few bugs in software-emulated alpha planes
64<li>Assorted minor bug fixes in glCopy/DrawPixels, glPixelZoom, etc.
65<li>Assorted DRI driver bug fixes.
66<li>Fixed a number of bugs that prevented "depth-peeling" rendering from working.
67</ul>
68
69
70<h2>Internal code changes</h2>
71<ul>
72<li>Old array_cache module replaced by new vbo module.  All geometry
73rendering is now cast in the form of vertex buffer objects.
74<li>Massive changes to the Shading Language compiler and related state.
75<li>Vertex/fragment shaders are compiled into GPU instructions and
76programs very similar to GL_ARB_vertex/fragment_program.
77<li>Vertex and fragment programs are executed with the same code now.
78<li>The SSE-optimized vertex program path has been removed since it didn't
79support more than 12 temp registers, didn't support branching/looping, etc.
80</ul>
81
82
83<h2>To Do (someday) items</h2>
84<ul>
85<li>Switch to freeglut
86<li>Fix linux-glide target/driver.
87<li>Improved lambda and derivative calculation for frag progs.
88</ul>
89
90
91<h2>Driver Status</h2>
92
93<pre>
94Driver			Status
95----------------------	----------------------
96DRI drivers		varies with the driver
97XMesa/GLX (on Xlib)	implements OpenGL 2.1
98OSMesa (off-screen)	implements OpenGL 2.1
99Windows/Win32		implements OpenGL 2.1
100Glide (3dfx Voodoo1/2)	implements OpenGL 1.3
101SVGA			unsupported
102Wind River UGL		unsupported
103DJGPP			unsupported
104GGI			unsupported
105BeOS			unsupported
106Allegro			unsupported
107D3D			unsupported
108</pre>
109
110</body>
111</html>
112