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 $Id: VERSIONS,v 1.9 1999/07/20 00:28:57 brianp Exp $


 Mesa Version History
 ====================

 1.0 beta   February 1995
    Initial release

 1.1 beta   March 4, 1995
    Changes:
 	faster point and line drawing (2x faster)
 	more systems supported, better Makefiles
 	Renamed lib*.a files to avoid collisions
 	many small bug fixes
    New:
 	pseudo-GLX functions added
 	new implementation of evaluators (eval2.c)
 	GLUT support

 1.1.1 beta   March 7, 1995
    Changes:
 	Reverted from eval2.c to eval.c due to FPE on Linux
 	more speed improvements
 	more Makefile changes

 1.1.2 beta   March 14, 1995
    New:
 	implementation of SGI's blending extensions
 	glXUseXFont implemented
 	added MESA_DEBUG environment variable support
    Changes:
 	Using eval2.c again
 	more FPE-prevention checks (0-length normals are OK)
 	a few small bug fixes
 	much faster pixel logic ops!
 	faster transformation arithmetic

 1.1.3 beta   March 31, 1995
    New:
 	gluScaleImage() and gluBuild2DMipMaps() implemented
 	Mesa widgets for Xt/Motif
 	blendEXT demos
 	added environment variables for selecting visuals
    Changes:
 	almost all GLUT demos work correctly now
 	faster X device driver functions
 	more bug fixes

 1.1.4 beta   April 20, 1995
    Bug fixes:
 	- missing #define SEEK_SET in src-tk/image.c
 	- compile glShadeModel into display lists
 	- fixed pow() domain error in src/light.c
 	- fixed "flickering bitmaps" in double buffer mode
 	- fixed tk.h and aux.h for C++
 	- state of LIGHT_MODEL_LOCAL_VIEWER was inverted
    New features:
 	- MUCH, MUCH nicer dithering in 8-bit RGB mode
 	- updated widgets and widget demos
 	- Implemented GLXPixmap functions
 	- Added GLU 1.1 and GLX 1.1 functions
 	- Changed the X/Mesa interface API, more versatile
 	- Implemented gluPartialDisk()

 1.2   May 22, 1995
    Bug fixes:
 	- IRIX 4.x makefile problem
 	- modified tk to share root colormap as needed
 	- gluLookAt normalization problem
 	- suppress Expose, NoExpose events in swapbuffers
 	- glBitmap() and glDrawPixels() clipping
    New features:
 	- GL_BLEND, GL_MODULATE, GL_DECAL, and GL_REPLACE_EXT texture
 	      modes implemented
 	- texture maps stored more efficiently
 	- texture maps can be compiled into display lists
 	- Bogdan Sikorski's GLU polygon tesselation code
 	- Linas Vepstas's sweep and extrusion library
 	- glXCreateContext()'s shareList parameter works as it's supposed to.
 	      XMesaCreateContext() updated to accept a shareList parameter too.
 	- Mesa can be compiled with real OpenGL .h files
 	- MESA_BACK_BUFFER environment variable
 	- better GLX error checking

 1.2.1   June 22, 1995
    Bug fixes:
 	- X/Mesa double buffer window resize crash
 	- widgets now pass PointerMotion events
 	- X/Mesa incorrect default clear color and drawing color
 	- more robust X MIT-SHM support in X/Mesa
 	- glTexImage( format=GL_LUMINANCE ) didn't work
 	- GL_LINE mode polygons with line width > 1.0 could cause a crash
 	- numerous feedback bugs
 	- glReadPixels() from depth buffer was wrong
 	- error prone depth and stencil buffer allocation
    New features:
 	- Preliminary Microsoft Windows driver
 	- Implemented a number of missing functions: glEvalCoord[12][df]v(),
 	    glGet...(), etc.
 	- Added a few missing symbols to gl.h and glu.h
 	- Faster rendering of smooth-shaded, RGBA, depth-buffered polygons.
 	- Faster rendering of lines when width=2.0
 	- Stencil-related functions now work in display lists
    Changes:
 	- renamed aux.h as glaux.h (MS-DOS names can't start with aux)
 	- most filenames are in 8.3 format to accomodate MS-DOS
 	- use GLubytes to store arrays of colors instead of GLints

 1.2.2   August 2, 1995
    New features:
 	- texture mapped points and lines
 	- NURBS! (but not 100% complete)
 	- viewports may safely extend beyond window boundaries
 	- MESA_PRIVATE_CMAP environment variable
 	- Grayscale X display support
 	- two new demos:  demos/gears.c and demos/shadow.c
 	- MachTen for Macintosh configuration
    Bug fixes:
 	- glGet*(GL_DEPTH_BITS) returned bytes, not bits
 	- point, line, and bitmap rasterization suffered from roundoff errors
 	- fixed a division by zero error in line clippping
 	- occasional wrong default background color really fixed!
 	- glDepthFunc(GL_ALWAYS) with glDepthMask(GL_FALSE) didn't work
 	- gluBuild2DMipmaps malloc problem fixed
 	- view volume clipping of smooth shaded lines resulted in bad colors
    Changes:
 	- new visual selection method in glXChooseVisual()
 	- improved GLU quadric functions
 	- call XSync for glFinish and XFlush for glFlush
 	- glVertex() calls now use a function pointer to avoid conditionals
 	- removed contrib directory from Mesa tar file (available on ftp site)
 	- AIX shared library support
 	- Removed GLUenum type as it's not in OpenGL

 1.2.3   September 26, 1995
    New features:
 	- Mesa header files now equivalent to SGI OpenGL headers
 	- Support for HP's Color Recovery dithering displays
 	- Faster vertex transformation
 	- Faster raster operations into X windows under certain conditions
 	- New configurations:  HP w/ shared libs, Ultrix w/ GCC, Data General
 	- 4-bit visuals now supported
    Bug fixes:
 	- glScissor bug fixed
 	- round-off errors in clipping lines against clip planes fixed
 	- byte swapping between hosts and display servers implemented
 	- glGetError() can be called without a current rendering context
 	- problem with accidentally culled polygons is fixed
 	- fixed some widget compilation problems

 1.2.4   November 17, 1995
    New features:
 	- More speed improvements (lighting, fogging, polygon drawing)
 	- Window system and OS-independent off-screen rendering
 	- Preliminary Fortran bindings
 	- glPolygonOffsetEXT implemented
 	- glColorMask and glIndexMask now fully implemented
 	- glPixelZoom implemented
 	- display lists fully implemented
 	- gamma correction
 	- dithering in 8-bit TrueColor/DirectColor visuals
    Changes:
 	- Improved device driver interface
 	- tk.h renamed to gltk.h to avoid conflicts with Tcl's Tk
 	- Dithering support moved from core into device driver
    Bug fixes:
 	- glEnable/Disable( GL_LIGHTING ) didn't always take effect
 	- glReadPixels byte swapping was broken
 	- glMaterial with pname==GL_AMBIENT_AND_DIFFUSE was broken
 	- duplicate glColor4b() prototype in GL/gl.h removed
 	- stripes in wave -ci demo fixed
 	- GL_LINEAR_MIPMAP_NEAREST had wrong value
 	- bugs in HP Color Recovery support fixed
 	- fixed bug when blending lines, points, bitmaps outside of window

 1.2.5   November 30, 1995
    New Features:
 	- updated MS Windows driver
 	- new implementation of StaticGray/GrayScale visual support
    Bug fixes:
 	- pixelzooming with gamma correction or blending didn't work
 	- HP color recovery visual wasn't being picked by glXChooseVisual
 	- glClear didn't always observe glColorMask changes
 	- olympic and offset demos didn't compile on some Suns
 	- texcoord clamping wasn't correct
 	- a polygon optimization introduced an occasional sampling problem

 1.2.6   January 26, 1996
    New Features:
 	- faster line and polygon rendering under certain conditions.  See
 	  Performance Tips 9 and 10 in README
 	- profiling
 	- lighting is a bit faster
 	- better perspective corrected texture mapping
 	- Amiga AmiWin (X11) support
 	- preliminary Linux SVGA driver
    Changes:
 	- now using a 16-bit depth buffer, faster, smaller
 	- GL_NORMALIZE is disabled by default
    Bug fixes:
 	- projective texture mapping
 	- fixed a memory leak in the context destroy function
 	- GL_POLYGON with less than 3 vertices caused a crash
 	- glGet*() returned wrong result for GL_INDEX_MODE
 	- reading pixels from an unmapped X window caused a BadMatch error

 1.2.7   March 5, 1996
    New:
 	- faster lighting
 	- faster 16-bit TrueColor rendering on Linux
 	- faster 32-bit TrueColor rendering on Linux, HP, IBM
 	- non-depth-buffered XImage polygons are faster
 	- vertex array extension
 	- software alpha planes
 	- updated Macintosh driver
 	- new NeXT driver
 	- GLU quadric functions generate texture coordinates
 	- reflect.c demo - reflective, textured surface demo
    Changes:
 	- gamma correction code moved into the X driver for better performance
    Bug fixes:
 	- multiple glClipPlane()'s didn't work reliably
 	- glPolygonMode() didn't always work
 	- glCullFace( GL_FRONT_AND_BACK ) didn't work
 	- texture mapping with gamma correction was buggy
 	- floating point exceptions in texture coordinate interpolation
 	- XImage byte swapping didn't always work
 	- polygon edge flags weren't always used correctly

 1.2.8   May 22, 1996
    New:
 	- overlay planes on X servers with the SERVER_OVERLAY_VISUALS property
 	- better monochrome output
 	- more IRIX 6.x configurations
 	- more robust RGB mode color allocation
 	- added MESA_XSYNC environment variable
 	- GLX_MESA_pixmap_colormap and GLX_EXT_visual_info extensions
 	- GL_MESA_window_pos extension
 	- faster glReadPixels/glDrawPixels for GL_DEPTH and GL_UNSIGNED_SHORT
 	  and GL_UNSIGNED_INT
        - driver for prototype Cirrus Mondello 3-D board
 	- updated AmigaDOS driver
        - a few small speed optimizations in polygon rendering
    Changes:
 	- internal device driver interface modified to simplify device
 	  driver implementations and to support hardware Z buffers
 	- several changes to the X/Mesa interface (xmesa.h)
    Bug fixes:
 	- fixed pow(0,0) domain error triggered on some systems
 	- glStencilClear() in a display list caused an infinite loop
 	- glRasterPos*() was sometimes off by +/-0.5 in X and Y
 	- color masking and blending were performed in wrong order
 	- auxSolidCylinder() sometimes drew a wire-frame cylinder
 	- fixed file writing bug in osdemo.c
 	- pixel mapping didn't always work
 	- the GL_GEQUAL stencil func didn't work
 	- the GL_INVERT stencil op didn't work
 	- the stencil write mask didn't work
 	- glPush/PopAttrib() didn't do enough error checking
 	- glIsList() didn't always work correctly

 2.0  October 10, 1996
    New:
 	- Implements OpenGL 1.1 API functions
 	- all texture filtering modes supported (mipmapping)
 	- faster texture mapping, see Performance Tip 11 in README
 	- antialiased RGB points
 	- X support for line and polygon stippling
 	- glDrawBuffer( GL_FRONT_AND_BACK ) works
 	- util/ directory of useful stuff
 	- demos/texobj demo of texture objects
    Changes:
 	- major internal changes for thread-safeness
 	- new device driver interface
 	- MESA_ALPHA env variable removed
 	- triangle rasterizer replaces polygon rasterizer
    Bug fixes:
 	- glPopAttrib() bug
 	- glDrawBuffer(GL_NONE) works now

 2.1  December 14, 1996
    New:
 	- VMS support
 	- MS-DOS driver
 	- OpenStep support
 	- updated, combined Windows 95/NT driver
 	- implemented glGetLighti() and glGetTexGen*()
 	- GLX does garbage collection of ancillary buffers
    Bug fixes:
 	- removed unused _EXT constants from gl.h
 	- fixed polygon offset bugs
 	- Z coordinates of clipped lines were incorrect
 	- glEdgeFlag() in display lists didn't always work
 	- glLight*() in display lists didn't work
 	- fixed X line stipple bugs (Michael Pichler)
 	- glXUseXfonts XFreeFont/XFreeFontInfo bug fixed
 	- fixed a feedback bug
 	- glTexGen*() now transforms GL_EYE_PLANE by inverse modelview matrix
 	- polygons were sometimes culled instead of clipped
 	- triangle rasterizer suffered from float/int overflow exceptions
 	- fixed FP underflow exception in lighting (specular exponent)
 	- glEnable/glDisable of GL_EXT_vertex_array enums didn't work
 	- fixed free(NULL) in GLU tesselator code
 	- using 24-bit color on some X servers resulted in garbage rendering
 	- 32-bit per pixel mode for XFree86 now works
 	- glRotate(a,0,0,0) gave unpredictable results
 	- GL_LINE_STRIP with > 480 vertices had occasional clipping problems
 	- 8-bit TrueColor GLXPixmap rendering incorrectly required a colormap
 	- glMaterial() wasn't ignored when GL_COLOR_MATERIAL was enabled
 	- glEnable(GL_COLOR_MATERIAL) followed by glColor() didn't work right
 	- accumulation buffer was limited to positive values
 	- projective textures didn't work
 	- selection buffer overflows weren't handled correctly
    Changes:
 	- restored the GL_EXT_polygon_offset extension
 	- slightly faster RGB dithering
 	- the SVGA driver works again
 	- Amiga driver now distributed separately
 	- NeXT driver updated for Mesa 2.x

 2.2  March 14, 1997
    New:
 	- better color selection when dithering
 	- added GL_EXT_texture_object extension
 	- updated MS-DOS driver for DJGPP
 	- added openbsd make configuration
 	- faster dithered flat-shaded triangles
 	- various compilation problems with Motif widgets fixed
 	- gl.h, glx.h and glu.h name mangling option
 	- BeOS driver
 	- 3D texture mapping extension
 	- GL_MESA_resize_buffers extension
 	- morph3d, stex3d and spectex demos
 	- 3Dfx support
    Bug fixes:
 	- glColorMaterial should finally work right in all respects
 	- linear interpolation of mipmap levels was incorrectly weighted
 	- readpix.c didn't compile on Macintosh
 	- GL_INVERT and related logic ops didn't work right
 	- glTexImage[12]D() didn't check its parameters consistantly
 	- fixed a memory leak in glTexImage[12]D()
 	- kludged around a SunOS 5.x/GCC compiler bug in the feedback code
 	- glReadPixels aborted instead of normally catching some errors
 	- a few 1.1 constants were missing or misnamed in gl.h
 	- glBegin(p); glBegin(q); didn't generate an error
 	- fixed a memory leak in GLX code
 	- clipping of concave polygons could cause a core dump
 	- 1-component alpha texture maps didn't work
 	- fixed a GLU polygon tesselator bug
 	- polygons with colinear vertices were sometimes culled
 	- feedback triangle colors were wrong when using smooth shading
 	- textures with borders didn't work correctly
 	- colors returned in feedback mode were wrong when using lighting
 	- spotlights didn't effect ambient lighting correctly
 	- gluPartialDisk() had a few bugs
    Changes:
 	- device driver interface expanded to support texture mapping
 	- faster matrix inversion subroutine
 	- commented out #include "wmesa_extend.h" from src/wmesa.c
 	- fixed many compiler warnings in the demo programs

 2.3  June 30, 1997
    New:
 	- Mesa distribution divided into two pieces:  library code and demos
 	- faster vertex transformation, clip testing, lighting
 	- faster line drawing
 	- TrueColor visuals how have dithering (for depths < 24 bits)
 	- added MESA_NO_DITHER environment variable
 	- new device driver function: NearFar(), RenderVB(), RasterSetup()
 	- added LynxOS configuration
 	- added cygnus Win32 configuration
 	- added texcyl.c GLUT demo
 	- added XMesaDitherColor() to X/Mesa interface
 	- new NURBS code from Bogdan Sikorski
 	- added demos/shape.c (non-rectangular X window!)
    Bug fixes:
 	- glEnable/DisableClientState() were missing from GL/gl.h
 	- GL_SPHERE_MAP texcoord generation didn't work correctly
 	- glXGetConfig() returned wrong number of depth, stencil, accum bits
 	- glDrawPixels feedback/selection didn't examine RasterPos valid bit
 	- black and white were reversed on some monochrome displays
 	- fixed potential image memory leak (wasn't setting reference counter)
 	- glDrawPixels sometimes didn't recognize some GL state changes
 	- gluProject/UnProject() didn't check for divide by zero
 	- stex3d demo called random() and srandom(), not portable
 	- fixed memory leaks in context.c and drawpix.c
 	- fixed NULL dereferencing problem in gl_update_texture_state()
 	- glReadPixels between glBegin/glEnd didn't generate an error.
 	- fixed memory leak in polygon tesselator (Randy Frank)
 	- fixed seg fault bug drawing flat-shaded, depth-tested lines
 	- clipped GL_TRIANGLE_STRIPs sometimes had wrong color when flat-shaded
 	- glBindTexture sometimes didn't work
 	- fixed a bug deep in glXReleaseBuffersMESA()
 	- fog was mistakenly applied to alpha
 	- glPopMatrix didn't set "dirty matrix" flag
 	- glPolygonStipple pattern was sometimes wrong
 	- glClear wasn't disabled during feedback and selection
 	- fixed memory leak in glTexSubImage[123]D
    Changes:
 	- many library source files reorganized
 	- faster X color allocation, colors also freed when finished with them
 	- new texture sampling function pointer in texture objects
 	- incorporated 3Dfx VooDoo driver v0.16 into main source tree
 	- many 3Dfx driver updates
 	- cygnus Makefiles now included
 	- updated DOS driver
 	- made a few changes to dosmesa.c and wmesa.c (VB->Unclipped)
 	- internally, colors now stored in GLubytes, not GLfixed
 	- optimized changing of GL_SHININESS parameter

 2.4  September 18, 1997
    New:
 	- updated 3Dfx Glide driver
 	- hacks for 3Dfx rendering into an X window or fullscreen
 	- added depth buffer access functions to X/Mesa and OS/Mesa interfaces
    Bug fixes:
 	- pixel buffer could overflow with long, wide lines
 	- fixed FP underflow problems in lighting
 	- glTexSubImage1D() had an unitialized variable
 	- incomplete texture objects could cause a segfault
 	- glDrawPixels with GL_COMPILE_AND_EXECUTE caused infinite loop
 	- flat-shaded quads in a strip were miscolored if clipped
 	- mipmapped triangle lod computation now works correctly
 	- fixed a few under/overflow bugs in triangle rasterizer
 	- glArrayElement() assigned bad normal if normal array disabled
 	- changed argument to glXReleaseBuffersMESA()
 	- fixed small triangle underflow bugs in tritemp.h (hopefully)
 	- glBindTexture(target, 0) caused a crash
 	- glTexImage[123]D() with NULL image pointer caused crash
 	- glPixelStore parameters are now ignored during display list execution
 	- fixed a two-sided lighting w/ clipping bug (black vertices)
 	- textures with width!=height were sometimes mis-rendered
 	- "weird" projection matrices could cause div by 0, other fp errors
    Changes:
 	- changed precompiled header symbol from PCH to PC_HEADER
 	- split api.c into api1.c and api2.c
 	- added hash.c source file (but not used yet)
 	- a few Sun and HP configuration file changes
 	- MESA_GLX_FX env var replaces MESA_FX_WINDOW and MESA_FX_FULLSCREEN
 	- fixed a few cygnus build problems (src/Makefile.cygnus, src/wmesa.c)

 2.5  November 20, 1997
    New:
 	- updated 3Dfx driver (v20) for GLQuake
 	- added GL_EXT_paletted_texture extension
 	- added GL_EXT_shared_texture_palette extension
 	- added GL_EXT_point_parameters extension
 	- now including Mark Kilgard's GLUT library v3.6
 	- new GLUT-based demos in gdemos/
 	- added a few more Unix config targets
 	- added Intel X86 assembly language vertex transformation code
 	- 3Dfx/Glide driver for Mesa now recognizes SST_SCREENREFRESH env var
 	- Windows 95 S3 Virge driver
    Bug fixes:
 	- glCopyTexImage?D would crash due to uninitialized variable
 	- glColor w/ glColorMaterial in a display list caused a bug
 	- fixed several glDrawPixels() and ReadPixels() bugs in 3Dfx driver
 	- glVertex4*() vertices weren't always projected correctly
 	- trying to use mipmapped textured points or lines caused crash
 	- glColor[34][fd]() values now clamped to [0,1] before int conversion
    Changes:
 	- new device driver functions for texture mapping
 	- hash tables used for display list and texture object lookup
 	- fixed GLX visual handling code to avoid saving redundant visuals
 	- 3Dfx Glide libraries automatically linked to libMesaGL.so
 	- dropped the Cirrus Logic Mondello code since it's obsolete
 	- updated Cygnus Makefiles (Stephane Rehel)
 	- updated Windows MSVC++ Makefiles (Oleg Letsinsky)
 	- procedure for making library files has changed: scripts now take
 	  a major and minor version arguments.  Make-config changed a lot.
 	- new implementation of glTexSubImage2D()
 	- updated widgets-mesa directory to create libMesaGLwM.a (Motif widget)
 	- separate linux-glide and linux-386-glide configurations

 2.6  February 12, 1998
    New:
 	- Windows WGL functions
 	- updated VMS, DOS, Windows, Cygnus, BeOS, Amiga compilation support
 	- v0.22 of 3Dfx Glide driver
 	- more X86 assembly language optimizations
 	- faster blending for some modes
 	- XMesaSetFXmode() to switch between 3Dfx window and full-screen mode 
 	- added preliminary thread support
 	- added GLX_MESA_copy_sub_buffer extension
 	- some clipping optimizations
    Bug fixes:
 	- fixed shading/material bug when drawing long primitive strips
 	- fixed clipping problem in long primitive strips
 	- fixed clipping bug when using 3Dfx driver
 	- fixed a problem when trying to use X fonts w/ 3Dfx driver
 	- fixed a texture filter bug in 3Dfx/Glide driver
 	- fixed bug in 3Dfx/Glide driver involving depth mask & clearing
 	- glLoadMatrix to set projection matrix confused the 3Dfx driver
 	- non-identity texture matrices didn't work with linux-386 configs
 	- glGenTextures() didn't reserve the returned texture IDs
 	- NULL proxy image sent to glTexImageXD() caused crash
 	- added texture state validation optimization (Henk Kok)
 	- fixed colormap reuse problem when using both RGB and CI windows
 	- 32bpp True/DirectColor X visuals weren't recognized
 	- fixed potential problem in evaluators memory allocation
 	- fixed assorted demo compilation bugs
    Changes:
 	- replaced old Mesa/windows/ directory with Mesa/WIN32/ directory
 	- converted a few old glaux/gltk demos to GLUT
 	- renamed directories:  demos -> xdemos,  gdemos -> demos


 3.0  September 17, 1998
    New:
 	- OpenGL 1.2 API
 	- GL_EXT_abgr pixel format extension
 	- GL_SGIS_texture_edge_clamp extension
 	- GL_SGIS_multitexture extension (to be replaced by GL_ARB_multitex)
 	- GL_EXT_multitexture extension (to be replaced by GL_ARB_multitex)
 	- GL_EXT_rescale_normal extension and renormal.c demo
 	- GLX_SGI_video_sync extension (a no-op)
 	- antialiased lines
 	- glGetTexImage() now implemented
 	- glDraw/Copy/ReadPixels() optimizations
 	- optimized textured triangle code (Marten Stromberg)
 	- more optimization of dithered TrueColor triangles in X driver
 	- Linux GGI driver
 	- updated MGL driver
    Bug fixes:
 	- lots of assorted compilation fixes
 	- glInitNames didn't write initial hit record
 	- glBitmap didn't always check for invalid raster position
 	- switching between GLX and OSMesa contexts caused a crash
 	- fixed uninitialized variable in Mesa widget code
 	- fixed typo in texture code which caused book/texgen to crash
 	- fixed texture sampling bug when filter=GL_LINEAR and wrap=GL_CLAMP
 	- gluDisk() in POINT or LINE mode sometimes failed
 	- fixed texture + fog bug
 	- GL_COMPILE_AND_EXECUTE mode didn't work reliably
 	- glMultMatrix in projection matrix mode w/ 3Dfx driver could fail
 	- glDrawPixels(color index pixels) weren't converted to RGBA
 	- fixed possible getenv() buffer overflow security bug
 	- glBitmap in feedback mode was offset by xOrig, yOrig params
 	- device driver's DrawPixels hook was never used
 	- glDrawPixels with zoomY!=1 and top/bottom clipping didn't work
 	- glDrawPixels optimized for GL_LUMINANCE, GL_LUMINANCE_ALPHA, GLubyte
 	- fixed MakeCurrent bug in GLwRedrawObjects() in MesaWorkstation.c
 	- glCopyTexSubImage2D() didn't work with 3Dfx driver
 	- lines with width = 2 could cause crash
 	- glClear with scissor rect sometimes cleared whole buffer
 	- glTexSubImage2D( .. GL_COLOR_INDEX .. ) didn't work
 	- glTexImageXD( .. GL_ABGR_EXT .. ) didn't work
 	- computation of inverse modelview matrix sometimes failed
 	- fixed GL_CLAMP mode texture sampling bug
 	- textured line interpolation was somewhat broken
 	- textured triangle interpolation was also somewhat broken
 	- glGet(MODELVIEW/PROJECTION/TEXTURE_MATRIX_STACK_DEPTH) off by one
 	- evaluator state wasn't fully initialized
 	- texture coordinate clipping was buggy
 	- evaluator surfaces could be mis-colored
 	- glAccum(GL_RETURN, s) didn't obey glColorMask() settings
 	- zero area polygons shouldn't be culled if polygon mode is point/line
 	- clipped width and height of glReadPixels was sometimes off by one
 	- blending with alpha = 0 or 1.0 wasn't always exact
 	- reading of pixels from clipped region was buggy
 	- minor tweaking of X visual management in GLX emulator
 	- glPolygonStipple now obeys pixel unpacking parameters
 	- glGetPolygonStipple now obeys pixel packing parameters
 	- interleaved vertex array texture coordinates were broken
 	- query of proxy texture internal format was broken
 	- alpha channel wasn't reliably cleared
 	- fixed divide by zero error in gluScaleImage if dest size = 1 x 1
    Conformance bug fixes:
 	- GL_SELECTION_BUFFER_POINTER and GL_SELECTION_BUFFER_SIZE were missing
 	- GL_TEXTURE_INTERNAL_FORMAT was missing
 	- glGet*(GL_POLYGON_STIPPLE) was broken
 	- glPush/PopAttrib() didn't save/restore all texture state
 	- glBitmap in feedback mode didn't work
 	- feedback of texture coords didn't always work
 	- glDrawPixels w/ format=GL_DEPTH_COMPONENT, type=GLbyte was broke
 	- glDrawPixels w/ format=GL_DEPTH_COMPONENT, type=GLubyte was broke
 	- glDrawPixels w/ format=GL_STENCIL_INDEX, type=GL_BITMAP was broke
    Changes:
 	- upgraded GLUT to version 3.7
 	- only GL and GLU library code included in MesaLib.tar.gz
 	- GLUT and all demos now in MesaDemos.tar.gz
 	- glaux and gltk libraries removed
 	- IRIX -n32 and -64 libs go in lib32/ and lib64/ directories


 3.1 beta 1  November 19, 1998
    New:
 	- GL_EXT_stencil_wrap extension
 	- GL_INGR_blend_func_separate extension
 	- GL_ARB_multitexture extension
 	- GL_NV_texgen_reflection extension
 	- newly optimized vertex transformation code
 	- updated GLUT 3.7 code
 	- better precision when using 32-bit Z buffer
 	- Allegro DJGPP driver
    Bug fixes:
 	- glCopyPixels between front/back buffers didn't copy alpha correctly
 	- fixed out-of-bounds memory access in optimized 2-D texture code
 	- glPixelStorei didn't accept GL_PACK/UNPACK_IMAGE_HEIGHT parameter
 	- glGet*() didn't accept GL_MAX_3D_TEXTURE_SIZE parameter
 	- clipping of texture coordinates sometimes had bad R,Q values
 	- GL_CLAMP_TO_EDGE texture sampling was off by 0.5 texels
 	- glEdgeFlagPointer() now takes a GLvoid * instead of GLboolean *
 	- texture was sometimes applied twice with 3Dfx driver
 	- glPush/PopAttrib() fouled up texture object reference counts
 	- glDeleteLists(0, n) caused assertion failure
 	- bilinear texture sampling wasn't accurate enough
 	- glClear w/ glDepthMask(GL_FALSE) didn't work right on 3Dfx
 	- color components were reversed on big endian 32 bpp X visuals
    Changes:
 	- removed GL_EXT_multitexture extension


 3.1 beta 2  May 24, 1999
    New:
 	- multi-textured points and lines (mjk@nvidia.com)
 	- optimized 24bpp X rendering (bernd.paysan@gmx.de)
 	- added allegro support (bernie-t@geocities.com)
 	- cleaned-up Windows-related stuff (Ted Jump)
 	- minor stereo changes (KendallB@scitechsoft.com)
 	- new BeOS driver which implements BGLView class
 	- new Direct3D driver (see src/D3D)
 	- more efficient filled gluCylinder() function
 	- utilities:  util/showbuffer.[ch] and util/glstate.[ch]
 	- fixed some IRIX compiler warnings
 	- added support for building Mesa in XFree86 with
 	    SGI's GLX (kevin@precisioninsight.com)
    Bug fixes:
 	- a variety of Windows/Mesa bug fixes (mjk@nvidia.com)
 	- packed pixel images weren't unpacked correctly
 	- patches some win32 files in GLUT (mjk@nvidia.com)
 	- glTexImage[123]D() didn't accept internalFormat == GL_COLOR_INDEX
 	- fixed lighting bug in Keith's new shading code
 	- fixed texture segfault seen in Lament screensaver
 	- fixed miscellaneous low-memory bugs
 	- glClear(GL_COLOR_BUFFER_BIT) with RGBA or CI masking was broken
 	- GL_LINEAR sampling of 3D textures was broken
 	- fixed SVR4 'cc' compiler macro problem (dawes@xfree86.org)
 	- added GL_TEXTURE_PRIORITY fix (keithh@netcomuk.co.uk)
 	- fixed wide point and wide line conformance bugs (brianp)
    Changes:
 	- some device driver changes (see src/dd.h)
 	- new copyright on core Mesa code


 3.1 beta 3  July ??, 1999
    Bug Fixes:
 	- glGetTexLevelParameter wasn't fully implemented
 	- glXUseXFont now handles multi-byte fonts
    Changes:
 	- New library names:  libGL.so and libGLU.so
 	- New subdirectories:  docs/ and bin/