1 2 Mesa 3.1 release notes 3 4 PLEASE READ!!!! 5 6 7New copyright 8------------- 9 10Mesa 3.1 will be distributed under an XFree86-style copyright instead 11of the GNU LGPL. 12 13 14New directories 15--------------- 16 17All documentation files are now in the docs/ directory. 18All shell scripts are now in the bin/ directory. 19 20 21New library names 22----------------- 23 24Formerly, the main Mesa library was named libMesaGL.so (or libMesaGL.a) 25and the GLU library was named libMesaGLU.so (or libMesaGLU.a). 26 27Now, the main library is named libGL.so (or libGL.a) and the GLU library 28is named libGLU.so (or libGLU.a). 29 30The change allows Mesa to be more easily substituted for OpenGL. 31Specifically, the linker/loader on some Unix-like systems won't 32allow libMesaGL.so to be used instead of libGL.so if the application 33was linked with the former. 34 35Warning: if you have another OpenGL implementation installed on your 36system (i.e. you have another OpenGL libGL.so) you'll have to be 37carefull about which library (OpenGL or Mesa) you link against. Be 38aware of -L linker flags and the value of the LD_LIBRARY_PATH environment 39variable. 40 41 42New library versioning 43---------------------- 44 45Previously, the Mesa GL library was named libMesaGL.so.3.0 46To better support Linux/OpenGL standards, the Mesa GL library is now 47named libGL.so.1.2.030100 This indicates version 1.2 of the OpenGL spec 48and Mesa implementation 3.1.0 49 50In the long term this will allow better interoperability with other 51OpenGL implementations, especially on Linux. In the short term, 52OpenGL apps may have to be relinked to use the new library naming. 53 54 55 56New makefiles 57------------- 58 59The old Makefiles found in the various directories have been renamed 60to Makefile.X11 in order to prevent filename collisions with autoconfig- 61generated Makefiles. 62 63The top-level Makefile simply includes Makefile.X11 64If your top-level Makefile get's overwritten/destroyed you can restore 65it by copying Makefile.X11 to Makefile 66 67 68New extensions 69-------------- 70 71GL_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 76GL_INGR_blend_func_separate 77 Allows specification of blend factors for RGB and Alpha independently. 78 (INGR = Intergraph) 79 80GL_ARB_multitexture 81 Multiple simultaneous textures. (ARB = Architecture Review Board) 82 83GL_NV_texgen_reflection 84 nVidia texgen extension for better reflection mapping. 85 86GL_PGI_misc_hints 87 Assorted transformation hints. 88 89GL_EXT_compiled_vertex_array 90 Compiled vertex arrays. 91 92GL_EXT_clip_volume_hint 93 Allows one to disable clip volume (frustum) testing. 94 95 96 97Extensions removed 98------------------ 99 100GL_EXT_multitexture - obsolete in favor of GL_ARB_multitexture 101 102 103 104Config file 105----------- 106 107By default, /etc/mesa.conf will be read when Mesa starts. This 108file controls default hints, enable/disable of extensions, and 109more. See the CONFIG file for documentation. 110 111 112 113Optimizations 114------------- 115 116Keith Whitwell has contributed significant optimizations to Mesa's 117vertex transformation code. Basically, the whole transformation 118stage of Mesa has been rewritten. 119 120It's impossible to give a speedup factor. You'll just have to 121try your app and see how it performs. 122 123 124 125Device Driver changes 126--------------------- 127 128A bunch of new device driver functions have been added. See src/dd.h 129Keith Harrison contributed many of them. I've been planning on adding 130a bunch of functions like these to make writing hardware drivers easier. 131More such function will probably be added in the near future. 132 133 134 135Miscellaneous 136------------- 137 138util/glstate.c has some handy functions for debugging. Basically, it 139offers a simple function for printing GL state variables. It's not 140finished yet. There's a LOT more GLenum records to be added (see the 141code). Anyone want to help? 142 143 144 145---------------------------------------------------------------------- 146