146 lines
3.8 KiB
Groff
146 lines
3.8 KiB
Groff
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Mesa 3.1 release notes
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PLEASE READ!!!!
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New copyright
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-------------
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Mesa 3.1 will be distributed under an XFree86-style copyright instead
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of the GNU LGPL.
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New directories
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---------------
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All documentation files are now in the docs/ directory.
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All shell scripts are now in the bin/ directory.
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New library names
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-----------------
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Formerly, the main Mesa library was named libMesaGL.so (or libMesaGL.a)
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and the GLU library was named libMesaGLU.so (or libMesaGLU.a).
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Now, the main library is named libGL.so (or libGL.a) and the GLU library
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is named libGLU.so (or libGLU.a).
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The change allows Mesa to be more easily substituted for OpenGL.
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Specifically, the linker/loader on some Unix-like systems won't
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allow libMesaGL.so to be used instead of libGL.so if the application
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was linked with the former.
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Warning: if you have another OpenGL implementation installed on your
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system (i.e. you have another OpenGL libGL.so) you'll have to be
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carefull about which library (OpenGL or Mesa) you link against. Be
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aware of -L linker flags and the value of the LD_LIBRARY_PATH environment
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variable.
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New library versioning
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----------------------
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Previously, the Mesa GL library was named libMesaGL.so.3.0
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To better support Linux/OpenGL standards, the Mesa GL library is now
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named libGL.so.1.2.030100 This indicates version 1.2 of the OpenGL spec
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and Mesa implementation 3.1.0
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In the long term this will allow better interoperability with other
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OpenGL implementations, especially on Linux. In the short term,
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OpenGL apps may have to be relinked to use the new library naming.
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New makefiles
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-------------
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The old Makefiles found in the various directories have been renamed
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to Makefile.X11 in order to prevent filename collisions with autoconfig-
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generated Makefiles.
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The top-level Makefile simply includes Makefile.X11
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If your top-level Makefile get's overwritten/destroyed you can restore
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it by copying Makefile.X11 to Makefile
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New extensions
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--------------
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GL_EXT_stencil_wrap
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Implements two new stencil operations: GL_INCR_WRAP_EXT and
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GL_DECR_WRAP_EXT which allow stencil increment and decrement
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without clamping.
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GL_INGR_blend_func_separate
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Allows specification of blend factors for RGB and Alpha independently.
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(INGR = Intergraph)
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GL_ARB_multitexture
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Multiple simultaneous textures. (ARB = Architecture Review Board)
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GL_NV_texgen_reflection
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nVidia texgen extension for better reflection mapping.
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GL_PGI_misc_hints
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Assorted transformation hints.
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GL_EXT_compiled_vertex_array
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Compiled vertex arrays.
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GL_EXT_clip_volume_hint
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Allows one to disable clip volume (frustum) testing.
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Extensions removed
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------------------
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GL_EXT_multitexture - obsolete in favor of GL_ARB_multitexture
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Config file
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-----------
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By default, /etc/mesa.conf will be read when Mesa starts. This
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file controls default hints, enable/disable of extensions, and
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more. See the CONFIG file for documentation.
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Optimizations
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-------------
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Keith Whitwell has contributed significant optimizations to Mesa's
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vertex transformation code. Basically, the whole transformation
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stage of Mesa has been rewritten.
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It's impossible to give a speedup factor. You'll just have to
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try your app and see how it performs.
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Device Driver changes
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---------------------
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A bunch of new device driver functions have been added. See src/dd.h
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Keith Harrison contributed many of them. I've been planning on adding
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a bunch of functions like these to make writing hardware drivers easier.
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More such function will probably be added in the near future.
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Miscellaneous
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-------------
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util/glstate.c has some handy functions for debugging. Basically, it
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offers a simple function for printing GL state variables. It's not
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finished yet. There's a LOT more GLenum records to be added (see the
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code). Anyone want to help?
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----------------------------------------------------------------------
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