--- /dev/null
+
+ Mesa 3.1 release notes
+
+ PLEASE READ!!!!
+
+
+New copyright
+-------------
+
+Mesa 3.1 will be distributed under an XFree86-style copyright instead
+of the GNU LGPL.
+
+
+New directories
+---------------
+
+All documentation files are now in the docs/ directory.
+All shell scripts are now in the bin/ directory.
+
+
+New library names
+-----------------
+
+Formerly, the main Mesa library was named libMesaGL.so (or libMesaGL.a)
+and the GLU library was named libMesaGLU.so (or libMesaGLU.a).
+
+Now, the main library is named libGL.so (or libGL.a) and the GLU library
+is named libGLU.so (or libGLU.a).
+
+The change allows Mesa to be more easily substituted for OpenGL.
+Specifically, the linker/loader on some Unix-like systems won't
+allow libMesaGL.so to be used instead of libGL.so if the application
+was linked with the former.
+
+Warning: if you have another OpenGL implementation installed on your
+system (i.e. you have another OpenGL libGL.so) you'll have to be
+carefull about which library (OpenGL or Mesa) you link against. Be
+aware of -L linker flags and the value of the LD_LIBRARY_PATH environment
+variable.
+
+
+New library versioning
+----------------------
+
+Previously, the Mesa GL library was named libMesaGL.so.3.0
+To better support Linux/OpenGL standards, the Mesa GL library is now
+named libGL.so.1.2.030100 This indicates version 1.2 of the OpenGL spec
+and Mesa implementation 3.1.0
+
+In the long term this will allow better interoperability with other
+OpenGL implementations, especially on Linux. In the short term,
+OpenGL apps may have to be relinked to use the new library naming.
+
+
+
+New makefiles
+-------------
+
+The old Makefiles found in the various directories have been renamed
+to Makefile.X11 in order to prevent filename collisions with autoconfig-
+generated Makefiles.
+
+The top-level Makefile simply includes Makefile.X11
+If your top-level Makefile get's overwritten/destroyed you can restore
+it by copying Makefile.X11 to Makefile
+
+
+New extensions
+--------------
+
+GL_EXT_stencil_wrap
+ Implements two new stencil operations: GL_INCR_WRAP_EXT and
+ GL_DECR_WRAP_EXT which allow stencil increment and decrement
+ without clamping.
+
+GL_INGR_blend_func_separate
+ Allows specification of blend factors for RGB and Alpha independently.
+ (INGR = Intergraph)
+
+GL_ARB_multitexture
+ Multiple simultaneous textures. (ARB = Architecture Review Board)
+
+GL_NV_texgen_reflection
+ nVidia texgen extension for better reflection mapping.
+
+GL_PGI_misc_hints
+ Assorted transformation hints.
+
+GL_EXT_compiled_vertex_array
+ Compiled vertex arrays.
+
+GL_EXT_clip_volume_hint
+ Allows one to disable clip volume (frustum) testing.
+
+
+
+Extensions removed
+------------------
+
+GL_EXT_multitexture - obsolete in favor of GL_ARB_multitexture
+
+
+
+Config file
+-----------
+
+By default, /etc/mesa.conf will be read when Mesa starts. This
+file controls default hints, enable/disable of extensions, and
+more. See the CONFIG file for documentation.
+
+
+
+Optimizations
+-------------
+
+Keith Whitwell has contributed significant optimizations to Mesa's
+vertex transformation code. Basically, the whole transformation
+stage of Mesa has been rewritten.
+
+It's impossible to give a speedup factor. You'll just have to
+try your app and see how it performs.
+
+
+
+Device Driver changes
+---------------------
+
+A bunch of new device driver functions have been added. See src/dd.h
+Keith Harrison contributed many of them. I've been planning on adding
+a bunch of functions like these to make writing hardware drivers easier.
+More such function will probably be added in the near future.
+
+
+
+Miscellaneous
+-------------
+
+util/glstate.c has some handy functions for debugging. Basically, it
+offers a simple function for printing GL state variables. It's not
+finished yet. There's a LOT more GLenum records to be added (see the
+code). Anyone want to help?
+
+
+
+----------------------------------------------------------------------
+$Id: RELNOTES-3.1,v 1.2 2000/04/07 17:08:06 brianp Exp $
--- /dev/null
+
+ Mesa 3.3 release notes
+
+ PLEASE READ!!!!
+
+
+
+
+Header file / GLenum changes
+----------------------------
+
+The gl.h and glu.h headers now use #defines to define all GL_* tokens
+instead of C-language enums. This change improves Mesa/OpenGL
+interoperability.
+
+
+
+New API dispatch code
+---------------------
+
+The core Mesa gl* functions are now implemented with a new dispatch
+(jump table) which will allow simultaneous direct/indirect rendering.
+
+The code is found in the glapi*.[ch] files.
+
+Of interest: the actual "glFooBar" functions are generated with
+templatized code defined in glapitemp.h and included by glapi.c
+The glapitemp.h template should be reusable for all sorts of OpenGL
+projects.
+
+
+New thread support
+------------------
+
+Thread support in Mesa has been rewritten. The glthread.[ch] files
+replace mthreads.[ch]. Thread safety is always enabled (on platforms
+which support threads, that is). There is virtually no performance
+penalty for typical single-thread applications. See the glapi.c
+file for details.
+
+
+
+Make configuration changes
+--------------------------
+
+If you use the old-style (non GNU automake) method to build Mesa note
+that several of the configuration names have changed:
+
+ Old name New name
+ ------------- ----------------
+ linux-elf linux
+ linux linux-static
+ linux-386-elf linux-386
+ linux-386 linux-386-static
+ etc.
+
+
+
+New extensions
+--------------
+
+GL_EXT_transpose_matrix
+ Adds glLoadTransposeMatrix() and glMultTransposeMatrix() functions.
+ See http://reality.sgi.com/opengl/arb/extensions/ext_text/GL_EXT_transpose_matrix.txt
+
+GL_EXT_texture_add_env
+ Adds GL_ADD texture environment mode.
+ See http://www.berkelium.com/OpenGL/EXT/texture_env_add.txt
+
+GL_EXT_texture_lod_bias
+ Allows mipmapped texture blurring and sharpening.
+
+GLX_EXT_visual_rating extension
+ This extension has no effect in stand-alone Mesa (used for DRI).
+
+GL_HP_occlusion_test
+ Used for bounding box occlusion testing (see demos/occlude.c).
+
+GL_SGIX_pixel_texture / GL_SGIS_pixel_texture
+ Lets glDraw/CopyPixels draw a texture coordinate image
+
+
+
+GLX_SGI_make_current_read functionality
+---------------------------------------
+
+The functionality of this extension is needed for GLX 1.3 (and required
+for the Linux/OpenGL standards base).
+
+Implementing this function required a **DEVICE DRIVER CHANGE**.
+The old SetBuffer() function has been replaced by SetReadBuffer() and
+SetDrawBuffer(). All device drivers will have to be updated because
+of this change.
+
+The new function, glXMakeContextCurrent(), in GLX 1.3 now works in Mesa.
+The xdemos/wincopy.c program demonstrates it.
+
+
+
+Image-related code changes
+--------------------------
+
+The imaging path code used by glDrawPixels, glTexImage[123]D,
+glTexSubImage[123], etc has been rewritten. It's now faster,
+uses less memory and has several bug fixes. This work was
+actually started in Mesa 3.1 with the glTexImage paths but has now
+been carried over to glDrawPixels as well.
+
+
+
+Device driver interface changes
+-------------------------------
+
+Added new functions for hardware stencil buffer support:
+ WriteStencilSpan
+ ReadStencilSpan
+ WriteStencilPixels
+ ReadStencilPixels
+
+
+Removed old depth buffer functions:
+ AllocDepthBuffer
+ DepthTestSpan
+ DepthTestPixels
+ ReadDepthSpanFloat
+ ReadDepthSpanInt
+
+
+Added new depth buffer functions:
+ WriteDepthSpan
+ ReadDepthSpan
+ WriteDepthPixels
+ ReadDepthPixels
+
+ These functions always read/write 32-bit GLuints. This will allow
+ drivers to have anywhere from 0 to 32-bit Z buffers without
+ recompiling for 16 vs 32 bits as was previously needed.
+
+
+New texture image functions
+ The entire interface for texture image specification has been updated.
+ With the new functions, it's optional for Mesa to keep an internal copy
+ of all textures. Texture download should be a lot faster when the extra
+ copy isn't made.
+
+Misc changes
+ TexEnv now takes a target argument
+ Removed UseGlobalTexturePalette (use Enable function instead)
+
+
+Also added
+ ReadPixels
+ CopyPixels
+
+
+The SetBufffer function has been replaced by SetDrawBuffer and
+SetReadBuffer functions. This lets core Mesa independently
+specify which buffer is to be used for reading and which for
+drawing.
+
+The Clear function's mask parameter has changed. Instead of
+mask being the flags specified by the user to glClear, the
+mask is now a bitmask of the DD_*_BIT flags in dd.h. Now
+multiple color buffers can be specified for clearing (ala
+glDrawBuffers). The driver's Clear function must also
+check the glColorMask glIndexMask, and glStencilMask settings
+and do the right thing. See the X/Mesa, OS/Mesa, or FX/Mesa
+drivers for examples.
+
+
+The depth buffer changes shouldn't be hard to make for existing
+drivers. In fact, it should simply the code. Be careful with
+the depthBits value passed to gl_create_context(). 1 is a bad
+value! It should normally be 0, 16, 24, or 32.
+
+
+gl_create_framebuffer() takes new arguments which explicitly tell
+core Mesa which ancillary buffers (depth, stencil, accum, alpha)
+should be implemented in software. Mesa hardware drivers should
+carefully set these flags depending on which buffers are in the
+graphics card.
+
+
+
+Internal constants
+------------------
+
+Point and line size range and granularity limits are now stored
+in the gl_constants struct, which is the Const member of GLcontext.
+The limits are initialized from values in config.h but may be
+overridden by device drivers to reflect the limits of that driver's
+hardware.
+
+Also added constants for NumAuxBuffers and SubPixelBits.
+
+
+
+
+----------------------------------------------------------------------
+$Id: RELNOTES-3.3,v 1.1 2000/04/07 17:07:32 brianp Exp $
projects / mesa.git / commitdiff