Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
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Imported nx-X11-3.1.0-1.tar.gz
into Git repository

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+                         Mesa / BeOS Information
+
+
+
+* Introduction
+
+Brian Paul added in Mesa 3.1 a driver for BeOS R4.5 operating system.
+This driver implements a clone of the BGLView class.  This class,
+derived from BView, allows OpenGL rendering into any BeOS window.  His
+driver was updated in Mesa 4.1 and again in version 6.1 by Philippe
+Houdoin, who's maintaining this driver since.
+
+Any application which uses the BGLView should be able to use Mesa
+instead of Be's OpenGL without changing any code.
+
+Since Be's OpenGL implementation (as of R5) is basically just the
+SGI sample implementation, it's pretty slow.  You'll see that Mesa
+is considerably faster.
+
+
+* Source Code
+
+The source code for the driver is in src/mesa/drivers/beos/ directory.
+It's not 100% finished at this time but many GLUT-based demos are
+working.  No optimizations have been made at this time.
+
+
+* Compiling
+
+Since Mesa 6.x, it can be build under BeOS with both the R5 builtin gcc version
+or more recent gcc versions available for BeOS, like this gcc version 2.95.3 for BeOS 
+you can find at http://www.bebits.com/app/2157.
+Anyway, keep in mind that to take full advantage of Mesa x86 optimizations, you better
+want to use gcc 2.95.3 or sooner versions...
+
+To build Mesa-powered BeOS libGL.so version, open an Terminal window,
+move to Mesa root folder and type this command:
+
+$ make beos
+
+Note that the "beos" argument is only needed the first time to setup build config.
+Next times, typing "make" will be enough.
+
+When it finishes the Mesa based libGL.so library for
+BeOS will be in the lib/ directory, along libglut.so library.
+Several demo/test programs should have been build too under progs/* folders.
+If it stop when building one of the progs/* programs, you may want to ignore it
+and force make to move on next target by adding the -k make option:
+
+$ cd progs
+$ make -k
+
+To install it as Be's default libGL.so replacement, put it in your 
+/boot/home/config/lib/ directory. All your GL/GLUT apps will use 
+the Mesa based then. 
+
+By default, it build a non-debug version library.
+The x86 (MMX, SSE and 3DNOW) optimizations are also supported for x86 target.
+For PowerPC BeOS flavor, sorry, Mesa don't have ppc (Altivec) optimizations
+yet.
+
+To build a DEBUG version, type instead this :
+
+$ DEBUG=1 make
+
+
+* Example Programs
+
+Look under progs/beos/ for some BGLView-based programs.
+You should find under progs/samples and progs/redbook directories GLUT-based programs too.
+They all should have been compiled along with the Mesa library.
+
+
+* GLUT
+
+A beta version of GLUT 3.7 port for BeOS, made by Jake Hamby, can be found at 
+http://anobject.com/jehamby/Code/Glut-3.7-x86.zip.
+This is the version currently included in Mesa source code, and
+build in lib/libglut.so.
+ 
+A previous 3.5 version of this GLUT BeOS port used to be available at
+http://home.beoscentral.com/jehamby/Glut-3.5-x86.zip.
+
+They're special versions of GLUT for the BeOS platform.  I don't
+believe Mark Kilgard's normal GLUT distribution includes BeOS
+support.
+
+
+* Special Features
+
+Mesa's implementation of the BGLView class has an extra member
+function:  CopySubBufferMESA().  It basically works like SwapBuffers()
+but it only copies a sub region from the back buffer to the front
+buffer.  This is a useful optimization for some applications.
+If you use this method in your code be sure that you check at runtime
+that you're actually using Mesa (with glGetString) so you don't
+cause a fatal error when running with Be's OpenGL.
+
+
+* Work Left To Do
+
+- BDirectWindow single buffering support is not implemented yet.
+- Color index mode is not implemented yet.
+- Reading pixels from the front buffer not implemented yet.
+- There is also a BGLScreen class in BeOS for full-screen OpenGL rendering.
+  This should also be implemented for Mesa.
+- Multiple renderers add-ons support, first step toward hardware acceleration
+  support.
+
+* Other contributors to this BeOS port
+
+Jake Hamby                      jhamby <at> anobject <dot> com
+Marcin Konicki                  ahwayakchih <at> neoni <dot> net
+Francois Revol                  revol <at> free <dot> fr
+Nathan Whitehorn                nathanw <at> uchicago <dot> edu
+
+
+* Older BeOS Driver
+
+Mesa 2.6 had an earlier BeOS driver.  It was based on Mesa's Off-screen
+rendering interface, not BGLView.  If you're interested in the older
+driver you should get Mesa 2.6.
+
+
+* BeOS and Glide
+
+Mesa 3.0 supported the 3Dfx/Glide library on Beos.  Download Mesa 3.0
+if interested.  Ideally, the 3Dfx/Glide support should be updated to
+work with the new Mesa 3.1 BGLView implementation.
+
+The Glide library hasn't been updated for BeOS R4 and newer, to my knowledge,
+as of February, 1999.
+
+
+----------------------------------------------------------------------
+$Id: README.BEOS,v 1.1.1.6 2005/07/31 16:45:49 ajax Exp $