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  1.  
  2.                          Mesa 3.1 release notes
  3.  
  4.                              PLEASE READ!!!!
  5.  
  6.  
  7. New copyright
  8. -------------
  9.  
  10. Mesa 3.1 will be distributed under an XFree86-style copyright instead
  11. of the GNU LGPL.
  12.  
  13.  
  14. New directories
  15. ---------------
  16.  
  17. All documentation files are now in the docs/ directory.
  18. All shell scripts are now in the bin/ directory.
  19.  
  20.  
  21. New library names
  22. -----------------
  23.  
  24. Formerly, the main Mesa library was named libMesaGL.so (or libMesaGL.a)
  25. and the GLU library was named libMesaGLU.so (or libMesaGLU.a).
  26.  
  27. Now, the main library is named libGL.so (or libGL.a) and the GLU library
  28. is named libGLU.so (or libGLU.a).
  29.  
  30. The change allows Mesa to be more easily substituted for OpenGL.
  31. Specifically, the linker/loader on some Unix-like systems won't
  32. allow libMesaGL.so to be used instead of libGL.so if the application
  33. was linked with the former.
  34.  
  35. Warning: if you have another OpenGL implementation installed on your
  36. system (i.e. you have another OpenGL libGL.so) you'll have to be
  37. carefull about which library (OpenGL or Mesa) you link against.  Be
  38. aware of -L linker flags and the value of the LD_LIBRARY_PATH environment
  39. variable.
  40.  
  41.  
  42. New library versioning
  43. ----------------------
  44.  
  45. Previously, the Mesa GL library was named libMesaGL.so.3.0
  46. To better support Linux/OpenGL standards, the Mesa GL library is now
  47. named libGL.so.1.2.030100  This indicates version 1.2 of the OpenGL spec
  48. and Mesa implementation 3.1.0
  49.  
  50. In the long term this will allow better interoperability with other
  51. OpenGL implementations, especially on Linux.  In the short term,
  52. OpenGL apps may have to be relinked to use the new library naming.
  53.  
  54.  
  55.  
  56. New makefiles
  57. -------------
  58.  
  59. The old Makefiles found in the various directories have been renamed
  60. to Makefile.X11 in order to prevent filename collisions with autoconfig-
  61. generated Makefiles.
  62.  
  63. The top-level Makefile simply includes Makefile.X11
  64. If your top-level Makefile get's overwritten/destroyed you can restore
  65. it by copying Makefile.X11 to Makefile
  66.  
  67.  
  68. New extensions
  69. --------------
  70.  
  71. GL_EXT_stencil_wrap
  72.         Implements two new stencil operations: GL_INCR_WRAP_EXT and
  73.         GL_DECR_WRAP_EXT which allow stencil increment and decrement
  74.         without clamping.
  75.  
  76. GL_INGR_blend_func_separate
  77.         Allows specification of blend factors for RGB and Alpha independently.
  78.         (INGR = Intergraph)
  79.  
  80. GL_ARB_multitexture
  81.         Multiple simultaneous textures.  (ARB = Architecture Review Board)
  82.  
  83. GL_NV_texgen_reflection
  84.         nVidia texgen extension for better reflection mapping.
  85.  
  86. GL_PGI_misc_hints
  87.         Assorted transformation hints.
  88.  
  89. GL_EXT_compiled_vertex_array
  90.         Compiled vertex arrays.
  91.  
  92. GL_EXT_clip_volume_hint
  93.         Allows one to disable clip volume (frustum) testing.
  94.  
  95.  
  96.  
  97. Extensions removed
  98. ------------------
  99.  
  100. GL_EXT_multitexture - obsolete in favor of GL_ARB_multitexture
  101.  
  102.  
  103.  
  104. Config file
  105. -----------
  106.  
  107. By default, /etc/mesa.conf will be read when Mesa starts.  This
  108. file controls default hints, enable/disable of extensions, and
  109. more.  See the CONFIG file for documentation.
  110.  
  111.  
  112.  
  113. Optimizations
  114. -------------
  115.  
  116. Keith Whitwell has contributed significant optimizations to Mesa's
  117. vertex transformation code.  Basically, the whole transformation
  118. stage of Mesa has been rewritten.
  119.  
  120. It's impossible to give a speedup factor.  You'll just have to
  121. try your app and see how it performs.
  122.  
  123.  
  124.  
  125. Device Driver changes
  126. ---------------------
  127.  
  128. A bunch of new device driver functions have been added.  See src/dd.h
  129. Keith Harrison contributed many of them.  I've been planning on adding
  130. a bunch of functions like these to make writing hardware drivers easier.
  131. More such function will probably be added in the near future.
  132.  
  133.  
  134.  
  135. Miscellaneous
  136. -------------
  137.  
  138. util/glstate.c has some handy functions for debugging.  Basically, it
  139. offers a simple function for printing GL state variables.  It's not
  140. finished yet.  There's a LOT more GLenum records to be added (see the
  141. code).  Anyone want to help?
  142.  
  143.  
  144.  
  145. ----------------------------------------------------------------------
  146.