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
