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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 ??, 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 1.5 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