# The Mesa 3D Graphics Library

NOTE: Changes for Mesa 6.4 and later are documented in the corresponding release notes file.

# 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 accommodate 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 September 17, 1999

New:

- optimized glAccum function
- optimized 24bpp rendering in XMesa driver
- GLU 1.2 polygon tessellator

Bug Fixes:

- glGetTexLevelParameter wasn't fully implemented
- glXUseXFont now handles multi-byte fonts
- glIsEnabled(GL_TEXTURE_2D / 3D) returned wrong result
- alpha channel of blending points, lines was sometimes incorrect

Changes:

- New library names: "libGL" instead of "libMesaGL"
- New library numbering: libGL.so.1.2.310
- New subdirectories: docs/ and bin/
- New Makefile-system (autoconf,automake,libtool)

## 3.1 final December 14, 1999

New:

- added demos/gloss.c
- added xdemos/glxdpyinfo.c
- added GLX_ARB_get_proc_address extension
- rewritten glTexImage code paths (faster, less memory, bug fixes)

Bug Fixes:

- several vertex array bug fixes
- overlapping glCopyPixels with pixel zooming now works
- glXUseXFont() bitmaps were vertically shifted by one pixel
- glCopyPixels with pixel zooming now works

## 3.2 final April 24, 2000

Bug fixes:

- fixed memcpy bugs in span.c
- fixed missing glEnd problem in demos/tessdemo.c
- fixed bug when clearing 24bpp Ximages
- fixed clipping problem found in Unreal Tournament
- fixed Loki's "ice bug" and "crazy triangles" seen in Heretic2
- fixed Loki's 3dfx RGB vs BGR bug
- fixed Loki's 3dfx smooth/flat shading bug in SoF

Changes:

- updated docs/README file
- use bcopy() optimizations on FreeBSD
- re-enabled the optimized persp_textured_triangle() function

## 3.2.1 July 19, 2000

Bug fixes:

- gluBuild2DMipmaps() didn't accept GL_BGRA
- Fixed compile/makefile problems on IRIX
- fixed segfault in 3dfx driver when using GL selection/feedback
- no longer cull very, very tiny triangles
- blending w/ drawbuffer==GL_FRONT_BACK caused segfault (sw rendering)
- fixed Motif detection code in widgets-mesa/configure.in
- glColorMaterial and glMaterial updates to emissive and ambient didn't always work right
- Specular highlights weren't always in the right place
- clipped GL_LINE mode polygons had interior lines appear
- blend term GL_ONE_MINUS_CONSTANT_ALPHA was broken
- GL_NICEST fog didn't always work with flat shading
- glRect commands in display lists were sometimes miscolored
- Line Z offset didn't always work
- fixed texgen normal vector problem (gloss's teapot)
- numerous GL conformance bugs fixed

Changes:

- glColorMask(false, false, false, false) handled better/faster
- reverted to old GLU polygon tessellator, GLU 1.1
- updated Win32 build files

## 3.3 July 21, 2000

New:

- antialiased triangles now implemented
- GL_EXT_texture_env_add texture mode extension
- GLX 1.3 API
- support for separate draw/read buffers (ie GL_SGI_make_current_read)
- thread-safe API dispath
- improved glxinfo program
- demos/texdown program to measure texture download performance
- glext.h header file
- demos/geartrain program
- GL_EXT_texture_lod_bias extension
- demos/lodbias program
- further optimized glRead/DrawPixels for 16-bit TrueColor X visuals
- GLX_EXT_visual_rating extension (a no-op, however)
- GL_HP_occlusion_test extension (for X and OS/Mesa drivers)
- demos/occlude program
- GL_SGIS_pixel_texture and GL_SGIX_pixel_texture extensions
- demos/pixeltex program
- GL_SGI_color_matrix extension
- GL_SGI_color_table extension
- GL_EXT_histogram extension
- GL_ARB_texture_cube_map extension
- added xdemos/glxheads and xdemos/manywin
- demos/texenv.c demo
- GL_EXT_texture_env_combine extension (by Holger Waechtler)
- Xlib driver is now thread-safe (see xdemos/glthreads)

Bug Fixes:

- various GL conformance failures fixed since 3.2.1

Changes:

- gl.h now uses #defines instead of C enums for all tokens
- glu.h now uses #defines instead of C enums for all tokens
- moved programs from 3Dfx/demos/ into demos/ directory

## 3.4 November 3, 2000

New:

- optimized glDrawPixels for glPixelZoom(1,-1) Bug Fixes:
- widgets-mesa/src/*.c files were missing from 3.3 distro
- include/GL/mesa_wgl.h file was missing from 3.3 distro
- fixed some Win32 compile problems
- texture object priorities weren't getting initialized to 1.0
- glAreTexturesResident return value was wrong when using hardware
- glXUseXFont segfaulted when using 3dfx driver (via MESA_GLX_FX)
- glReadPixels with GLushort packed types was broken
- fixed a few bugs in the GL_EXT_texture_env_combine texture code
- glPush/PopAttrib(GL_ENABLE_BIT) mishandled multi-texture enables
- fixed some typos/bugs in the VB code
- glDrawPixels(GL_COLOR_INDEX) to RGB window didn't work
- optimized glDrawPixels paths weren't being used
- per-fragment fog calculation didn't work without a Z buffer
- improved blending accuracy, fixes Glean blendFunc test failures
- glPixelStore(GL_PACK/UNPACK_SKIP_IMAGES) wasn't handled correctly
- glXGetProcAddressARB() didn't always return the right address
- gluBuild[12]DMipmaps() didn't grok the GL_BGR pixel format
- texture matrix changes weren't always detected (GLUT projtex demo)
- fixed random color problem in vertex fog code
- fixed Glide-related bug that let Quake get a 24-bit Z buffer

Changes:

- finished internal support for compressed textures for DRI

## 3.4.1 February 14, 2001

New:

- fixed some Linux build problems
- fixed some Windows build problems
- GL_EXT_texture_env_dot3 extension (Gareth Hughes)

Bug fixes:

- added RENDER_START/RENDER_FINISH macros for glCopyTexImage in DRI
- various state-update code changes needed for DRI bugs
- disabled pixel transfer ops in glColorTable commands, not needed
- fixed bugs in glCopyConvolutionFilter1D/2D, glGetConvolutionFilter
- updated sources and fixed compile problems in widgets-mesa/
- GLX_PBUFFER enum value was wrong in glx.h
- fixed a glColorMaterial lighting bug
- fixed bad args to Read/WriteStencilSpan in h/w stencil clear function
- glXCopySubBufferMESA() Y position was off by one
- Error checking of glTexSubImage3D() was broken (bug 128775)
- glPopAttrib() didn't restore all derived Mesa state correctly
- Better glReadPixels accuracy for 16bpp color - fixes lots of OpenGL conformance problems at 16bpp.
- clearing depth buffer with scissoring was broken, would segfault
- OSMesaGetDepthBuffer() returned bad bytesPerValue value
- fixed a line clipping bug (reported by Craig McDaniel)
- fixed RGB color over/underflow bug for very tiny triangles

Known problems:

- NURBS or evaluator surfaces inside display lists don't always work

## 3.4.2 May 17, 2001

Bug fixes:

- deleting the currently bound texture could cause bad problems
- using fog could result in random vertex alpha values
- AA triangle rendering could touch pixels outside right window bound
- fixed byteswapping problem in clear_32bit_ximage() function
- fixed bugs in wglUseFontBitmapsA(), by Frank Warmerdam
- fixed memory leak in glXUseXFont()
- fragment sampling in AA triangle function was off by 1/2 pixel
- Windows: reading pixels from framebuffer didn't always work
- glConvolutionFilter2D could segfault or cause FP exception
- fixed segfaults in FX and X drivers when using tex unit 1 but not 0
- GL_NAND logicop didn't work right in RGBA mode
- fixed a memory corruption bug in vertex buffer reset code
- clearing the softwara alpha buffer with scissoring was broken
- fixed a few color index mode fog bugs
- fixed some bad assertions in color index mode
- fixed FX line 'stipple' bug #420091
- fixed stencil buffer clear width/height typo
- fixed GL error glitches in gl[Client]ActiveTextureARB()
- fixed Windows compilation problem in texutil.c
- fixed 1/8-pixel AA triangle sampling error

Changes:

- optimized writing mono-colored pixel spans to X pixmaps
- increased max viewport size to 2048 x 2048

## 3.5 June 21, 2001

New:

- internals of Mesa divided into modular pieces (Keith Whitwell)
- 100% OpenGL 1.2 conformance (passes all conformance tests)
- new AA line algorithm
- GL_EXT_convolution extension
- GL_ARB_imaging subset
- OSMesaCreateContextExt() function
- GL_ARB_texture_env_add extension (same as GL_EXT_texture_env_add)
- GL_MAX_TEXTURE_UNITS_ARB now defaults to eight
- GL_EXT_fog_coord extension (Keith Whitwell)
- GL_EXT_secondary_color extension (Keith Whitwell)
- GL_ARB_texture_env_add extension (same as GL_EXT_texture_env_add)
- GL_SGIX_depth_texture extension
- GL_SGIX_shadow and GL_SGIX_shadow_ambient extensions
- demos/shadowtex.c demo of GL_SGIX_depth_texture and GL_SGIX_shadow
- GL_ARB_texture_env_combine extension
- GL_ARB_texture_env_dot3 extension
- GL_ARB_texture_border_clamp (aka GL_SGIS_texture_border_clamp)
- OSMesaCreateContextExt() function
- libOSMesa.so library, contains the OSMesa driver interface
- GL/glxext.h header file for GLX extensions
- somewhat faster software texturing, fogging, depth testing
- all color-index conformance tests now pass (only 8bpp tested)
- SPARC assembly language TCL optimizations (David Miller)
- GL_SGIS_generate_mipmap extension

Bug Fixes:

- fbiRev and tmuRev were unitialized when using Glide3
- fixed a few color index mode conformance failures; all pass now
- now appling antialiasing coverage to alpha after texturing
- colors weren't getting clamped to [0,1] before color table lookup
- fixed RISC alignment errors caused by COPY_4UBV macro
- drawing wide, flat-shaded lines could cause a segfault
- vertices now snapped to 1/16 pixel to fix rendering of tiny triangles

Changes:

- SGI's Sample Implementation (SI) 1.3 GLU library replaces Mesa GLU
- new libOSMesa.so library, contains the OSMesa driver interface

## 4.0 October 22, 2001

New:

- Mesa 4.0 implements the OpenGL 1.3 specification
- GL_IBM_rasterpos_clip extension
- GL_EXT_texture_edge_clamp extension (aka GL_SGIS_texture_edge_clamp)
- GL_ARB_texture_mirrored_repeat extension
- WindML UGL driver (Stephane Raimbault)
- added OSMESA_MAX_WIDTH/HEIGHT queries
- attempted compiliation fixes for Solaris 5, 7 and 8
- updated glext.h and glxext.h files
- updated Windows driver (Karl Schultz)

Bug fixes:

- added some missing GLX 1.3 tokens to include/GL/glx.h
- GL_COLOR_MATRIX changes weren't recognized by teximage functions
- glCopyPixels with scale and bias was broken
- glRasterPos with lighting could segfault
- glDeleteTextures could leave a dangling pointer
- Proxy textures for cube maps didn't work
- fixed a number of 16-bit color channel bugs
- fixed a few minor memory leaks
- GLX context sharing was broken in 3.5
- fixed state-update bugs in glPopClientAttrib()
- fixed glDrawRangeElements() bug
- fixed a glPush/PopAttrib() bug related to texture binding
- flat-shaded, textured lines were broken
- fixed a dangling pointer problem in the XMesa code (Chris Burghart)
- lighting didn't always produce the correct alpha value
- fixed 3DNow! code to not read past end of arrays (Andrew Lewycky)

## 4.0.1 December 17, 2001

New:

- better sub-pixel sample positions for AA triangles (Ray Tice)
- slightly faster blending for (GL_ZERO, GL_ONE) and (GL_ONE, GL_ZERO)

Bug fixes:

- added missing break statements in glGet*() for multisample cases
- fixed uninitialized hash table mutex bug (display lists / texobjs)
- fixed bad teximage error check conditional (bug 476846)
- fixed demos readtex.c compilation problem on Windows (Karl Schultz)
- added missing glGet() query for GL_MAX_TEXTURE_LOD_BIAS_EXT
- silence some compiler warnings (gcc 2.96)
- enable the #define GL_VERSION_1_3 in GL/gl.h
- added GL 1.3 and GLX 1.4 entries to gl_mangle.h and glx_mangle.h
- fixed glu.h typedef problem found with MSDev 6.0
- build libGL.so with -Bsymbolic (fixes bug found with Chromium)
- added missing 'const' to glXGetContextIDEXT() in glxext.h
- fixed a few glXGetProcAddress() errors (texture compression, etc)
- fixed start index bug in compiled vertex arrays (Keith)
- fixed compilation problems in src/SPARC/glapi_sparc.S
- fixed triangle strip "parity" bug found in VTK medical1 demo (Keith)
- use glXGetProcAddressARB in GLUT to avoid extension linking problems
- provoking vertex of flat-shaded, color-index triangles was wrong
- fixed a few display list bugs (GLUT walker, molecule, etc) (Keith)
- glTexParameter didn't flush the vertex buffer (Ray Tice)
- feedback attributes for glDraw/CopyPixels and glBitmap were wrong
- fixed bug in normal length caching (ParaView lighting bug)
- fixed separate_specular color bug found in Chimera (18 Dec 2001)

## 4.0.2 April 2, 2002

New:

- New DOS (DJGPP) driver written by Daniel Borca
- New driver interface functions for TCL drivers (such as Radeon DRI)
- GL_RENDERER string returns "Mesa Offscreen16" or "Mesa Offscreen32" if using deep color channels
- latest GL/glext.h and GL/glxext.h headers from SGI

Bug fixes:

- GL_BLEND with non-black texture env color wasn't always correct
- GL_REPLACE with GL_RGB texture format wasn't always correct (alpha)
- glTexEnviv( pname != GL_TEXTURE_ENV_COLOR ) was broken
- glReadPixels was sometimes mistakenly clipped by the scissor box
- glDraw/ReadPixels didn't catch all the errors that they should have
- Fixed 24bpp rendering problem in Windows driver (Karl Schultz)
- 16-bit GLchan mode fixes (m_trans_tmp.h, s_triangle.c)
- Fixed 1-bit float->int conversion bug in glDrawPixels(GL_DEPTH_COMP)
- glColorMask as sometimes effecting glXSwapBuffers()
- fixed a potential bug in XMesaGarbageCollect()
- N threads rendering into one window didn't work reliably
- glCopyPixels didn't work for deep color channels
- improved 8 -> 16bit/channel texture image conversion (Gerk Huisma)
- glPopAttrib() didn't correctly restore user clip planes
- user clip planes failed for some perspective projections (Chromium)

Known bugs:

- mipmap LOD computation

## 4.0.3 June 25, 2002

New:

- updated GL/glext.h file (version 15)
- corrected MMX blend code (Jose Fonseca)
- support for software-based alpha planes in Windows driver
- updated GGI driver (Filip Spacek)

Bug fixes:

- glext.h had wrong values for GL_DOT3_RGB[A]_EXT tokens
- OSMesaMakeCurrent() didn't recognize buffer size changes
- assorted conformance fixes for 16-bit/channel rendering
- texcombine alpha subtraction mode was broken
- fixed lighting bug with non-uniform scaling and display lists
- fixed bug when deleting shared display lists
- disabled SPARC cliptest assembly code (Mesa bug 544665)
- fixed a couple Solaris compilation/link problems
- blending clipped glDrawPixels didn't always work
- glGetTexImage() didn't accept packed pixel types
- glPixelMapu[is]v() could explode given too large of pixelmap
- glGetTexParameter[if]v() didn't accept GL_TEXTURE_MAX_ANISOTROPY_EXT
- glXCopyContext() could lead to segfaults
- glCullFace(GL_FRONT_AND_BACK) didn't work (bug 572665)

Changes:

- lots of C++ (g++) code clean-ups
- lots of T&L updates for the Radeon DRI driver

Known bugs:

- mipmap LOD computation (fixed for Mesa 4.1)

## 4.0.4 October 3, 2002

New:

- GL_NV_texture_rectangle extension
- updated glext.h header (version 17)
- updated DOS driver (Daniel Borca)
- updated BeOS R5 driver (Philippe Houdoin)
- added GL_IBM_texture_mirror_repeat
- glxinfo now takes -l option to print interesting OpenGL limits info
- GL_MESA_ycbcr_texture extension
- GL_APPLE_client_storage extension (for some DRI drivers only)
- GL_MESA_pack_invert extension

Bug fixes:

- fixed GL_LINEAR fog bug by adding clamping
- fixed FP exceptions found using Alpha CPU
- 3dfx MESA_GLX_FX=window (render to window) didn't work
- fixed memory leak in wglCreateContest (Karl Schultz)
- define GLAPIENTRY and GLAPI if undefined in glu.h
- wglGetProcAddress didn't handle all API functions
- when testing for OpenGL 1.2 vs 1.3, check for GL_ARB_texture_cube_map
- removed GL_MAX_CONVOLUTION_WIDTH/HEIGHT from glGetInteger/Float/etc()
- error checking in compressed tex image functions had some glitches
- fixed AIX compile problem in src/config.c
- glGetTexImage was using pixel unpacking instead of packing params
- auto-mipmap generation for cube maps was incorrect

Changes:

- max texture units reduced to six to accommodate texture rectangles
- removed unfinished GL_MESA_sprite_point extension code

## 4.1 October 29, 2002

New:

- GL_NV_vertex_program extension
- GL_NV_vertex_program1_1 extension
- GL_ARB_window_pos extension
- GL_ARB_depth_texture extension
- GL_ARB_shadow extension
- GL_ARB_shadow_ambient extension
- GL_EXT_shadow_funcs extension
- GL_ARB_point_parameters extension
- GL_ARB_texture_env_crossbar
- GL_NV_point_sprite extension
- GL_NV_texture_rectangle extension
- GL_EXT_multi_draw_arrays extension
- GL_EXT_stencil_two_side extension
- GLX_SGIX_fbconfig and GLX_SGIX_pbuffer extensions
- GL_ATI_texture_mirror_once extension (Ian Romanick)
- massive overhaul/simplification of software rasterizer module, many contributions from Klaus Niederkrueger
- faster software texturing in some cases (i.e. trilinear filtering)
- new OSMesaGetProcAddress() function
- more blend modes implemented with MMX code (Jose Fonseca)
- added glutGetProcAddress() to GLUT
- added GLUT_FPS env var to compute frames/second in glutSwapBuffers()
- pbinfo and pbdemo PBuffer programs
- glxinfo -v prints transprent pixel info (Gerd Sussner)

Bug fixes:

- better mipmap LOD computation (prevents excessive blurriness)
- OSMesaMakeCurrent() didn't recognize buffer size changes
- assorted conformance fixes for 16-bit/channel rendering
- texcombine alpha subtraction mode was broken
- fixed some blend problems when GLchan==GLfloat (Gerk Huisma)
- clamp colors to [0,inf] in OSMesa if GLchan==GLfloat (Gerk Huisma)
- fixed divide by zero error in NURBS tessellator (Jon Perry)
- fixed GL_LINEAR fog bug by adding clamping
- fixed FP exceptions found using Alpha CPU
- 3dfx/glide driver render-to-window feature was broken
- added missing GLX_TRANSPARENT_RGB token to glx.h
- fixed error checking related to paletted textures
- fixed reference count error in glDeleteTextures (Randy Fayan)

Changes:

- New spec file and Python code to generate some GL dispatch files
- Glide driver defaults to "no" with autoconf/automake
- updated demos/stex3d with new options

## 5.0 November 13, 2002

New:

- OpenGL 1.4 support (glGetString(GL_VERSION) returns "1.4")
- removed some overlooked debugging code
- glxinfo updated to support GLX_ARB_multisample
- GLUT now support GLX_ARB_multisample
- updated DOS driver (Daniel Borca)

Bug fixes:

- GL_POINT and GL_LINE-mode polygons didn't obey cull state
- fixed potential bug in _mesa_align_malloc/calloc()
- fixed missing triangle bug when running vertex programs
- fixed a few HPUX compilation problems
- FX (Glide) driver didn't compile
- setting GL_TEXTURE_BORDER_COLOR with glTexParameteriv() didn't work
- a few EXT functions, like glGenTexturesEXT, were no-ops
- a few OpenGL 1.4 functions like glFogCoord*, glBlendFuncSeparate, glMultiDrawArrays and glMultiDrawElements were missing
- glGet*(GL_ACTIVE_STENCIL_FACE_EXT) was broken
- Pentium 4 Mobile was mistakenly identified as having 3DNow!
- fixed one-bit error in point/line fragment Z calculation
- fixed potential segfault in fakeglx code
- fixed color overflow problem in DOT3 texture env mode

## 5.0.1 March 30, 2003

New:

- DOS driver updates from Daniel Borca
- updated GL/gl_mangle.h file (Bill Hoffman) Bug fixes:
- auto mipmap generation for cube maps was broken (bug 641363)
- writing/clearing software alpha channels was unreliable
- minor compilation fixes for OS/2 (Evgeny Kotsuba)
- fixed some bad assertions found with shadowtex demo
- fixed error checking bug in glCopyTexSubImage2D (bug 659020)
- glRotate(angle, -x, 0, 0) was incorrect (bug 659677)
- fixed potential segfault in texture object validation (bug 659012)
- fixed some bogus code in _mesa_test_os_sse_exception_support (Linus)
- fix fog stride bug in tnl code for h/w drivers (Michel Danzer)
- fixed glActiveTexture / glMatrixMode(GL_TEXTURE) bug (#669080)
- glGet(GL_CURRENT_SECONDARY_COLOR) should return 4 values, not 3
- fixed compilation problem on Solaris7/x86 (bug 536406)
- fixed prefetch bug in 3DNow! code (Felix Kuhling)
- fixed NeXT build problem (FABSF macro)
- glDrawPixels Z values when glPixelZoom!=1 were invalid (bug 687811)
- zoomed glDraw/CopyPixels with clipping sometimes failed (bug 689964)
- AA line and triangle Z values are now rounded, not truncated
- fixed color interpolation bug when GLchan==GLfloat (bug 694461)
- glArePrograms/TexturesResident() wasn't 100% correct (Jose Fonseca)
- fixed a minor GL_COLOR_MATERIAL bug
- NV vertex program EXP instruction was broken
- glColorMask misbehaved with X window / pixmap rendering
- fix autoconf/libtool GLU C++ linker problem on Linux (a total hack)
- attempt to fix GGI compilation problem when MesaDemos not present
- NV vertex program ARL-relative fetches didn't work

Changes:

- use glPolygonOffset in gloss demo to avoid z-fighting artifacts
- updated winpos and pointblast demos to use ARB extensions
- disable SPARC normal transformation code (bug 673938)
- GLU fixes for OS/2 (Evgeny Kotsuba)

## 5.0.2 September 5, 2003

Bug fixes:

- fixed texgen problem causing texcoord's Q to be zero (stex3d)
- default GL_TEXTURE_COMPARE_MODE_ARB was wrong
- GL_CURRENT_MATRIX_NV query was wrong
- GL_CURRENT_MATRIX_STACK_DEPTH_NV query was off by one
- GL_LIST_MODE query wasn't correct
- GL_FOG_COORDINATE_SOURCE_EXT query wasn't supported
- GL_SECONDARY_COLOR_ARRAY_SIZE_EXT query returned wrong value
- blended, wide lines didn't always work correctly (bug 711595)
- glVertexAttrib4svNV w component was always 1
- fixed bug in GL_IBM_rasterpos_clip (missing return)
- GL_DEPTH_TEXTURE_MODE = GL_ALPHA didn't work correctly
- a few Solaris compilation fixes
- fixed glClear() problem for DRI drivers (non-existant stencil, etc)
- fixed int/REAL mixup in GLU NURBS curve evaluator (Eric Cazeaux)
- fixed delete [] bug in SI GLU (bug 721765) (Diego Santa Cruz)
- glFog() didn't clamp fog colors
- fixed bad float/int conversion for GL_TEXTURE_PRIORITY in the gl[Get]TexParameteri[v] functions
- fixed invalid memory references in glTexGen functions (bug 781602)
- integer-valued color arrays weren't handled correctly
- glDrawPixels(GL_DEPTH_COMPONENT) with glPixelZoom didn't work
- GL_EXT_texture_lod_bias is part of 1.4, overlooked in 5.0.1

Changes:

- build GLUT with -fexceptions so C++ apps propogate exceptions

## 5.1 December 17, 2003

New:

- reorganized directory tree
- GL_ARB_vertex/fragment_program extensions (Michal Krol & Karl Rasche)
- GL_ATI_texture_env_combine3 extension (Ian Romanick)
- GL_SGI_texture_color_table extension (Eric Plante)
- GL_NV_fragment_program extension
- GL_NV_light_max_exponent extension
- GL_EXT_texture_rectangle (identical to GL_NV_texture_rectangle)
- GL_ARB_occlusion_query extension
- GL_ARB_point_sprite extension
- GL_ARB_texture_non_power_of_two extension
- GL_IBM_multimode_draw_arrays extension
- GL_EXT_texture_mirror_clamp extension (Ian Romanick)
- GL_ARB_vertex_buffer_object extension
- new X86 feature detection code (Petr Sebor)
- less memory used for display lists and vertex buffers
- demo of per-pixel lighting with a fragment program (demos/fplight.c)
- new version (18) of glext.h header
- new spriteblast.c demo of GL_ARB_point_sprite
- faster glDrawPixels in X11 driver in some cases (see relnotes/5.1)
- faster glCopyPixels in X11 driver in some cases (see relnotes/5.1)

Bug fixes:

- really enable OpenGL 1.4 features in DOS driver.
- fixed issues in glDrawPixels and glCopyPixels for very wide images
- glPixelMapf/ui/usv()'s size parameter is GLsizei, not GLint
- fixed some texgen bugs reported by Daniel Borca
- fixed wglMakeCurrent(NULL, NULL) bug (#835861)
- fixed glTexSubImage3D z-offset bug (Cedric Gautier)
- fixed RGBA blend enable bug (Ville Syrjala)
- glAccum is supposed to be a no-op in selection/feedback mode
- fixed texgen bug #597589 (John Popplewell)

Changes:

- dropped API trace feature (src/Trace/)
- documentation overhaul. merged with website content. more html.
- glxgears.c demo updated to use GLX swap rate extensions
- glTexImage1/2/3D now allows width/height/depth = 0
- disable SPARC asm code on Linux (bug 852204)

## 6.0 January 16, 2004

New:

- full OpenGL 1.5 support
- updated GL/glext.h file to version 21 Changes:
- changed max framebuffer size to 4Kx4K (MAX_WIDTH/HEIGHT in config.h) Bug fixes:
- fixed bug in UNCLAMPED_FLOAT_TO_UBYTE macro; solves a color clamping issue
- updated suno5-gcc configs
- glColor3 functions sometimes resulted in undefined alpha values
- fixed FP divide by zero error seen on VMS with xlockmore, others
- fixed vertex/fragment program debug problem (bug 873011)
- building on AIX with gcc works now
- glDeleteProgramsARB failed for ARB fragment programs (bug 876160)
- glDrawRangeElements tried to modify potentially read-only storage
- updated files for building on Windows

## 6.0.1 April 2, 2004

New:

- upgraded glext.h to version 22
- new build targets (Dan Schikore)
- new linux-x86-opteron build target (Heath Feather)

Bug fixes:

- glBindProgramARB didn't update all necessary state
- fixed build problems on OpenBSD
- omit CVS directories from tarballs
- glGetTexImage(GL_COLOR_INDEX) was broken
- fixed an infinite loop in t&l module
- silenced some valgrind warnings about using unitialized memory
- fixed some compilation/link glitches on IRIX (Mike Stephens)
- glBindProgram wasn't getting compiled into display lists
- GLX_FBCONFIG_ID wasn't recognized in glXChooseFBConfig() (bug 888079)
- two-sided lighting and vertex program didn't work (bug 887330)
- stores to program parameter registers in vertex state programs didn't work.
- fixed glOrtho bug found with gcc 3.2.2 (RH9)
- glXCreateWindow() wasn't fully implemented (bug 890894)
- generic vertex attribute arrays didn't work in display lists
- vertex buffer objects' default usage and access fields were wrong
- glDrawArrays with start!=0 was broken
- fragment program PK2H, UP2H, UP4B and UP4UB instructions were broken
- linux-osmesa16-static config didn't work
- fixed a few color index rendering problems (bug 910687)
- glInterleavedArrays didn't respect GL_CLIENT_ACTIVE_TEXTURE
- OSMesa RGB and BGR modes were broken
- glProgramStringARB mistakenly required a null-terminated string
- fragment program XPD instruction was incorrect
- glGetMaterial() didn't work reliably
- ARB_fragment_program KIL instruction was incorrect

## 6.1 August 18, 2004

New:

- Revamped Makefile system
- glXUseRotatedXFont() utility (see xdemos/xuserotfont.c)
- internal driver interface changes related to texture object allocation, vertex/fragment programs, BlendEquationSeparate, etc.
- option to walk triangle edges with double-precision floats (Justin Novosad of Discreet) (see config.h file)
- support for AUX buffers in software GLX driver
- updated glext.h to version 24 and glxext.h to version 6
- new MESA_GLX_FORCE_ALPHA and MESA_GLX_DEPTH_BITS env vars
- updated BeOS support (Philippe Houdoin)

Changes:

- fragment fog interpolation is perspective corrected now
- new glTexImage code, much cleaner, may be a bit faster

Bug fixes:

- glArrayElement in display lists didn't handle generic vertex attribs
- glFogCoord didn't always work properly
- ARB_fragment_program fog options didn't work
- frag prog TEX instruction no longer incorrectly divides s,t,r by q
- ARB frag prog TEX and TEXP instructions now use LOD=0
- glTexEnviv in display lists didn't work
- glRasterPos didn't do texgen or apply texture matrix
- GL_DOUBLE-valued vertex arrays were broken in some cases
- fixed texture rectangle edge/border sampling bugs
- sampling an incomplete texture in a fragment program would segfault
- glTexImage was missing a few error checks
- fixed some minor glGetTexParameter glitches
- GL_INTENSITY was mistakenly accepted as a <format> to glTexImage
- fragment program writes to RC/HC register were broken
- fixed a few glitches in GL_HP_occlusion_test extension
- glBeginQueryARB and glEndQueryARB didn't work inside display lists
- vertex program state references were broken
- fixed triangle color interpolation bug on AIX (Shane Blackett)
- fixed a number of minor memory leaks (bug #1002030)

## 6.2 October 2, 2004

New:

- enabled GL_ARB_texture_rectangle (same as GL_NV_texture_rectangle)
- updated Doxygen support (Jose Fonseca)

Changes:

- some GGI driver updates (Christoph Egger, bug 1025977)

Bug fixes:

- Omit GL_ARB_texture_non_power_of_two from list of OpenGL 1.5 features
- fixed a few compilation issues on IRIX
- fixed a matrix classification bug (reported by Wes Bethel)
- we weren't reseting the vertex/fragment program error state before parsing (Dave Reveman)
- adjust texcoords for sampling texture rectangles (Dave Reveman)
- glGet*(GL_MAX_VERTEX_ATTRIBS_ARB) wasn't implemented
- repeated calls to glDeleteTexture(t) could lead to a crash
- fixed potential ref count bugs in VBOs and vertex/fragment programs
- spriteblast demo didn't handle window size changes correctly
- glTexSubImage didn't handle pixels=NULL correctly for PBOs
- fixed color index mode glDrawPixels bug (Karl Schultz)

## 6.2.1 December 9, 2004

Bug fixes:

- don't apply regular fog or color sum when using a fragment program
- glProgramEnvParameter4fARB always generated an error on GL_FRAGMENT_PROGRAM_ARB (fdo bug 1645)
- glVertexAttrib3svNV and glVertexAttrib3svARB were broken
- fixed width/height mix-up in glSeparableFilter2D()
- fixed regression in glCopyPixels + convolution
- glReadPixels from a clipped front color buffer didn't always work
- glTexImage didn't accept GL_RED/GREEN/BLUE as the format
- Attempting queries/accesses of VBO 0 weren't detected as errors
- paletted textures failed if the palette had fewer than 256 entries

Changes:

- fixed a bunch of compiler warnings found with gcc 3.4
- bug reports should to go bugzilla.freedesktop.org

## 6.3 July 20, 2005

New:

- GL_EXT_framebuffer_object extension
- GL_ARB_draw_buffers extension
- GL_ARB_pixel_buffer_object extension
- GL_OES_read_format extension (Ian Romanick)
- DirectFB driver (Claudio Ciccani)
- x86_64 vertex transformation code (Mikko T.)
- Updated GL/glext.h to version 29

Changes:

- added -stereo option for glxgears demo (Jacek Rosik)
- updated the PBuffer demo code in xdemos/ directory
- glDeleteTextures/Programs/Buffers() now makes the object ID available for immediate re-use
- assorted 64-bit clean-ups fixes (x86_64 and Win64)
- lots of internal changes for GL_EXT_framebuffer_object

Bug fixes:

- some functions didn't support PBO functionality
- glGetTexImage didn't convert color index images to RGBA as required
- fragment program texcoords were sometimes wrong for points and lines
- fixed problem with negative dot product in arbfplight, fplight demos
- fixed bug in perspective correction of antialiased, textured lines
- querying GL_POST_CONVOLUTION_ALPHA_BIAS_EXT returned wrong value
- fixed a couple per-pixel fog bugs (Soju Matsumoto)
- glGetBooleanv(GL_FRAGMENT_PROGRAM_BINDING_NV) was broken
- fixed float parsing bug in ARB frag/vert programs (bug 2520)
- XMesaGetDepthBuffer() returned incorrect value for bytesPerValue
- GL_COLOR_MATERIAL with glColor3 didn't properly set diffuse alpha
- glXChooseFBConfig() crashed if attribList pointer was NULL
- program state.light[n].spot.direction.w was wrong value (bug 3083)
- fragment program fog option required glEnable(GL_FOG) - wrong.
- glColorTable() could produce a Mesa implementation error (bug 3135)
- RasterPos could get corrupted by color index rendering path
- Removed bad XTranslateCoordinates call when rendering to Pixmaps
- glPopAttrib() didn't properly restore GL_TEXTURE_GEN enable state
- fixed a few Darwin compilation problems

## 6.3.1

This was an intermediate release for X.org which wasn't otherwise released.)

## 6.3.2 August 19, 2005

New:

- The distribution now includes the DRI drivers and GLX code

Changes:

- Made the DRI "new" driver interface standard, remove old code

Bug fixes:

- GL_ARB_vertex/fragment_shader were mistakenly listed in the extensions string
- negative relative addressing in vertex programs was broken
- update/fix SPARC assembly code for vertex transformation
- fixed memory leak when freeing GLX drawables/renderbuffers
- fixed display list memory leak
- the GL_PIXEL_MAP_I_TO_I table is now floating point, not integer
- wglGetProcAddress() didn't handle wgl-functions
- fixed glxext.h cross-compile issue (Colin Harrison)
- assorted DRI driver fixes

NOTE: Changes for Mesa 6.4 and later are documented in the corresponding release notes file.