None of this info is relevant anymore.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
+++ /dev/null
-
- Mesa Cygwin/X11 Information
-
-
-WARNING
-=======
-
-If you installed X11 (packages xorg-x11-devel and xorg-x11-bin-dlls ) with the
-latest setup.exe from Cygwin the GL (Mesa) libraries and include are already
-installed in /usr/X11R6.
-
-The following will explain how to "replace" them.
-
-Installation
-============
-
-How to compile Mesa on Cygwin/X11 systems:
-
-1. Shared libs:
- type 'make cygwin-sl'.
-
- When finished, the Mesa DLL will be in the Mesa-x.y/lib/ and
- Mesa-x.y/bin directories.
-
-
-2. Static libs:
- type 'make cygwin-static'.
- When finished, the Mesa libraries will be in the Mesa-x.y/lib/ directory.
-
-Header and library files:
- After you've compiled Mesa and tried the demos I recommend the following
- procedure for "installing" Mesa.
-
- Copy the Mesa include/GL directory to /usr/X11R6/include:
- cp -a include/GL /usr/X11R6/include
-
- Copy the Mesa library files to /usr/X11R6/lib:
- cp -a lib/* /usr/X11R6ocal/lib
-
- Copy the Mesa bin files (used by the DLL stuff) to /usr/X11R6/bin:
- cp -a lib/cyg* /usr/X11R6/bin
-
-Xt/Motif widgets:
- If you want to use Mesa or OpenGL in your Xt/Motif program you can build
- the widgets found in either the widgets-mesa or widgets-sgi directories.
- The former were written for Mesa and the later are the original SGI
- widgets. Look in those directories for more information.
- For the Motif widgets you must have downloaded the lesstif package.
-
-
-Using the library
-=================
-
-Configuration options:
- The file src/mesa/main/config.h has many parameters which you can adjust
- such as maximum number of lights, clipping planes, maximum texture size,
- etc. In particular, you may want to change DEPTH_BITS from 16 to 32
- if a 16-bit depth buffer isn't precise enough for your application.
-
-
-Shared libraries:
- If you compile shared libraries (Win32 DLLS) you may have to set an
- environment variable to specify where the Mesa libraries are located.
- Set the PATH variable to include /your-dir/Mesa-2.6/bin.
- Otherwise, when you try to run a demo it may fail with a message saying
- that one or more DLL couldn't be found.
-
-
-Xt/Motif Widgets:
- Two versions of the Xt/Motif OpenGL drawing area widgets are included:
-
- widgets-sgi/ SGI's stock widgets
- widgets-mesa/ Mesa-tuned widgets
-
- Look in those directories for details
-
-
-Togl:
- Togl is an OpenGL/Mesa widget for Tcl/Tk.
- See http://togl.sourceforge.net for more information.
-
-
-
-X Display Modes:
- Mesa supports RGB(A) rendering into almost any X visual type and depth.
-
- The glXChooseVisual function tries its best to pick an appropriate visual
- for the given attribute list. However, if this doesn't suit your needs
- you can force Mesa to use any X visual you want (any supported by your
- X server that is) by setting the MESA_RGB_VISUAL and MESA_CI_VISUAL
- environment variables. When an RGB visual is requested, glXChooseVisual
- will first look if the MESA_RGB_VISUAL variable is defined. If so, it
- will try to use the specified visual. Similarly, when a color index
- visual is requested, glXChooseVisual will look for the MESA_CI_VISUAL
- variable.
-
- The format of accepted values is: <visual-class> <depth>
- Here are some examples:
-
- using the C-shell:
- % setenv MESA_RGB_VISUAL "TrueColor 8" // 8-bit TrueColor
- % setenv MESA_CI_VISUAL "PseudoColor 12" // 12-bit PseudoColor
- % setenv MESA_RGB_VISUAL "PseudoColor 8" // 8-bit PseudoColor
-
- using the KornShell:
- $ export MESA_RGB_VISUAL="TrueColor 8"
- $ export MESA_CI_VISUAL="PseudoColor 12"
- $ export MESA_RGB_VISUAL="PseudoColor 8"
-
-
-Double buffering:
- Mesa can use either an X Pixmap or XImage as the backbuffer when in
- double buffer mode. Using GLX, the default is to use an XImage. The
- MESA_BACK_BUFFER environment variable can override this. The valid
- values for MESA_BACK_BUFFER are: Pixmap and XImage (only the first
- letter is checked, case doesn't matter).
-
- A pixmap is faster when drawing simple lines and polygons while an
- XImage is faster when Mesa has to do pixel-by-pixel rendering. If you
- need depth buffering the XImage will almost surely be faster. Exper-
- iment with the MESA_BACK_BUFFER variable to see which is faster for
- your application.
-
-
-Colormaps:
- When using Mesa directly or with GLX, it's up to the application writer
- to create a window with an appropriate colormap. The aux, tk, and GLUT
- toolkits try to minimize colormap "flashing" by sharing colormaps when
- possible. Specifically, if the visual and depth of the window matches
- that of the root window, the root window's colormap will be shared by
- the Mesa window. Otherwise, a new, private colormap will be allocated.
-
- When sharing the root colormap, Mesa may be unable to allocate the colors
- it needs, resulting in poor color quality. This can happen when a
- large number of colorcells in the root colormap are already allocated.
- To prevent colormap sharing in aux, tk and GLUT, define the environment
- variable MESA_PRIVATE_CMAP. The value isn't significant.
-
-
-Gamma correction:
- To compensate for the nonlinear relationship between pixel values
- and displayed intensities, there is a gamma correction feature in
- Mesa. Some systems, such as Silicon Graphics, support gamma
- correction in hardware (man gamma) so you won't need to use Mesa's
- gamma facility. Other systems, however, may need gamma adjustment
- to produce images which look correct. If in the past you thought
- Mesa's images were too dim, read on.
-
- Gamma correction is controlled with the MESA_GAMMA environment
- variable. Its value is of the form "Gr Gg Gb" or just "G" where
- Gr is the red gamma value, Gg is the green gamma value, Gb is the
- blue gamma value and G is one gamma value to use for all three
- channels. Each value is a positive real number typically in the
- range 1.0 to 2.5. The defaults are all 1.0, effectively disabling
- gamma correction. Examples using csh:
-
- % setenv MESA_GAMMA "2.3 2.2 2.4" // separate R,G,B values
- % setenv MESA_GAMMA "2.0" // same gamma for R,G,B
-
- The demos/gamma.c program may help you to determine reasonable gamma
- value for your display. With correct gamma values, the color intensities
- displayed in the top row (drawn by dithering) should nearly match those
- in the bottom row (drawn as grays).
-
- Alex De Bruyn reports that gamma values of 1.6, 1.6 and 1.9 work well
- on HP displays using the HP-ColorRecovery technology.
-
- Mesa implements gamma correction with a lookup table which translates
- a "linear" pixel value to a gamma-corrected pixel value. There is a
- small performance penalty. Gamma correction only works in RGB mode.
- Also be aware that pixel values read back from the frame buffer will
- not be "un-corrected" so glReadPixels may not return the same data
- drawn with glDrawPixels.
-
- For more information about gamma correction see:
- http://www.inforamp.net/~poynton/notes/colour_and_gamma/GammaFAQ.html
-
-
-Overlay Planes
-
- Overlay planes in the frame buffer are supported by Mesa but require
- hardware and X server support. To determine if your X server has
- overlay support you can test for the SERVER_OVERLAY_VISUALS property:
-
- xprop -root | grep SERVER_OVERLAY_VISUALS
-
-
-HPCR glClear(GL_COLOR_BUFFER_BIT) dithering
-
- If you set the MESA_HPCR_CLEAR environment variable then dithering
- will be used when clearing the color buffer. This is only applicable
- to HP systems with the HPCR (Color Recovery) system.
-
-
-Extensions
-==========
- There are three Mesa-specific GLX extensions at this time.
-
- GLX_MESA_pixmap_colormap
-
- This extension adds the GLX function:
-
- GLXPixmap glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visual,
- Pixmap pixmap, Colormap cmap )
-
- It is an alternative to the standard glXCreateGLXPixmap() function.
- Since Mesa supports RGB rendering into any X visual, not just True-
- Color or DirectColor, Mesa needs colormap information to convert RGB
- values into pixel values. An X window carries this information but a
- pixmap does not. This function associates a colormap to a GLX pixmap.
- See the xdemos/glxpixmap.c file for an example of how to use this
- extension.
-
- GLX_MESA_release_buffers
-
- Mesa associates a set of ancillary (depth, accumulation, stencil and
- alpha) buffers with each X window it draws into. These ancillary
- buffers are allocated for each X window the first time the X window
- is passed to glXMakeCurrent(). Mesa, however, can't detect when an
- X window has been destroyed in order to free the ancillary buffers.
-
- The best it can do is to check for recently destroyed windows whenever
- the client calls the glXCreateContext() or glXDestroyContext()
- functions. This may not be sufficient in all situations though.
-
- The GLX_MESA_release_buffers extension allows a client to explicitly
- deallocate the ancillary buffers by calling glxReleaseBuffersMESA()
- just before an X window is destroyed. For example:
-
- #ifdef GLX_MESA_release_buffers
- glXReleaseBuffersMESA( dpy, window );
- #endif
- XDestroyWindow( dpy, window );
-
- This extension is new in Mesa 2.0.
-
- GLX_MESA_copy_sub_buffer
-
- This extension adds the glXCopySubBufferMESA() function. It works
- like glXSwapBuffers() but only copies a sub-region of the window
- instead of the whole window.
-
- This extension is new in Mesa version 2.6
-
-
-
-Summary of X-related environment variables:
- MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode (X only)
- MESA_CI_VISUAL - specifies the X visual and depth for CI mode (X only)
- MESA_BACK_BUFFER - specifies how to implement the back color buffer (X only)
- MESA_PRIVATE_CMAP - force aux/tk libraries to use private colormaps (X only)
- MESA_GAMMA - gamma correction coefficients (X only)
-
-
-----------------------------------------------------------------------
-README.CYGWIN - lassauge April 2004 - based on README.X11
+++ /dev/null
-
- Mesa 3.0 MITS Information
-
-
-This software is distributed under the terms of the GNU Library
-General Public License, see the LICENSE file for details.
-
-
-This document is a preliminary introduction to help you get
-started. For more detaile information consult the web page.
-
-http://10-dencies.zkm.de/~mesa/
-
-
-
-Version 0.1 (Yes it's very alpha code so be warned!)
-Contributors:
- Emil Briggs (briggs@bucky.physics.ncsu.edu)
- David Bucciarelli (tech.hmw@plus.it)
- Andreas Schiffler (schiffler@zkm.de)
-
-
-
-1. Requirements:
- Mesa 3.0.
- An SMP capable machine running Linux 2.x
- libpthread installed on your machine.
-
-
-2. What does MITS stand for?
- MITS stands for Mesa Internal Threading System. By adding
- internal threading to Mesa it should be possible to improve
- performance of OpenGL applications on SMP machines.
-
-
-3. Do applications have to be recoded to take advantage of MITS?
- No. The threading is internal to Mesa and transparent to
- applications.
-
-
-4. Will all applications benefit from the current implementation of MITS?
- No. This implementation splits the processing of the vertex buffer
- over two threads. There is a certain amount of overhead involved
- with the thread synchronization and if there is not enough work
- to be done the extra overhead outweighs any speedup from using
- dual processors. You will not for example see any speedup when
- running Quake because it uses GL_POLYGON and there is only one
- polygon for each vertex buffer processed. Test results on a
- dual 200 Mhz. Pentium Pro system show that one needs around
- 100-200 vertices in the vertex buffer before any there is any
- appreciable benefit from the threading.
-
-
-5. Are there any parameters that I can tune to try to improve performance.
- Yes. You can try to vary the size of the vertex buffer which is
- define in VB_MAX located in the file src/vb.h from your top level
- Mesa distribution. The number needs to be a multiple of 12 and
- the optimum value will probably depend on the capabilities of
- your machine and the particular application you are running.
-
-
-6. Are there any ways I can modify the application to improve its
- performance with the MITS?
- Yes. Try to use as many vertices between each Begin/End pair
- as possbile. This will reduce the thread synchronization
- overhead.
-
-
-7. What sort of speedups can I expect?
- On some benchmarks performance gains of up to 30% have been
- observerd. Others may see no gain at all and in a few rare
- cases even some degradation.
-
-
-8. What still needs to be done?
- Lots of testing and benchmarking.
- A portable implementation that works within the Mesa thread API.
- Threading of additional areas of Mesa to improve performance
- even more.
-
-
-
-Installation:
-
- 1. This assumes that you already have a working Mesa 3.0 installation
- from source.
- 2. Place the tarball MITS.tar.gz in your top level Mesa directory.
- 3. Unzip it and untar it. It will replace the following files in
- your Mesa source tree so back them up if you want to save them.
-
-
- README.MITS
- Make-config
- Makefile
- mklib.glide
- src/vbxform.c
- src/vb.h
-
- 4. Rebuild Mesa using the command
-
- make linux-386-glide-mits
-
+++ /dev/null
-
- Info on using Mesa 3.0 with Linux Quake I and Quake II
-
-
-
-Disclaimer
-----------
-
-I am _not_ a Quake expert by any means. I pretty much only run it to
-test Mesa. There have been a lot of questions about Linux Quake and
-Mesa so I'm trying to provide some useful info here. If this file
-doesn't help you then you should look elsewhere for help. The Mesa
-mailing list or the news://news.3dfx.com/3dfx.linux.glide newsgroup
-might be good.
-
-Again, all the information I have is in this file. Please don't email
-me with questions.
-
-If you have information to contribute to this file please send it to
-me at brianp@elastic.avid.com
-
-
-
-Linux Quake
------------
-
-You can get Linux Quake from http://www.idsoftware.com/
-
-Quake I and II for Linux were tested with, and include, Mesa 2.6. You
-shouldn't have too many problems if you simply follow the instructions
-in the Quake distribution.
-
-
-
-RedHat 5.0 Linux problems
--------------------------
-
-RedHat Linux 5.x uses the GNU C library ("glibc" or "libc6") whereas
-previous RedHat and other Linux distributions use "libc5" for its
-runtime C library.
-
-Linux Quake I and II were compiled for libc5. If you compile Mesa
-on a RedHat 5.x system the resulting libMesaGL.so file will not work
-with Linux Quake because of the different C runtime libraries.
-The symptom of this is a segmentation fault soon after starting Quake.
-
-If you want to use a newer version of Mesa (like 3.x) with Quake on
-RedHat 5.x then read on.
-
-The solution to the C library problem is to force Mesa to use libc5.
-libc5 is in /usr/i486-linux-libc5/lib on RedHat 5.x systems.
-
-Emil Briggs (briggs@tick.physics.ncsu.edu) nicely gave me the following
-info:
-
-> I only know what works on a RedHat 5.0 distribution. RH5 includes
-> a full set of libraries for both libc5 and glibc. The loader ld.so
-> uses the libc5 libraries in /usr/i486-linux-libc5/lib for programs
-> linked against libc5 while it uses the glibc libraries in /lib and
-> /usr/lib for programs linked against glibc.
->
-> Anyway I changed line 41 of mklib.glide to
-> GLIDELIBS="-L/usr/local/glide/lib -lglide2x -L/usr/i486-linux-libc5/lib"
->
-> And I started quake2 up with a script like this
-> #!/bin/csh
-> setenv LD_LIBRARY_PATH /usr/i486-linux-libc5/lib
-> setenv MESA_GLX_FX f
-> ./quake2 +set vid_ref gl
-> kbd_mode -a
-> reset
-
-
-I've already patched the mklib.glide file. You'll have to start Quake
-with the script shown above though.
-
-
-
-**********************
-
-Daryll Strauss writes:
-
-Here's my thoughts on the problem. On a RH 5.x system, you can NOT build
-a libc5 executable or library. Red Hat just doesn't include the right
-stuff to do it.
-
-Since Quake is a libc5 based application, you are in trouble. You need
-libc5 libraries.
-
-What can you do about it? Well there's a package called gcc5 that does
-MOST of the right stuff to compile with libc5. (It brings back older
-header files, makes appropriate symbolic links for libraries, and sets
-up the compiler to use the correct directories) You can find gcc5 here:
-ftp://ecg.mit.edu/pub/linux/gcc5-1.0-1.i386.rpm
-
-No, this isn't quite enough. There are still a few tricks to getting
-Mesa to compile as a libc5 application. First you have to make sure that
-every compile uses gcc5 instead of gcc. Second, in some cases the link
-line actually lists -L/usr/lib which breaks gcc5 (because it forces you
-to use the glibc version of things)
-
-If you get all the stuff correctly compiled with gcc5 it should work.
-I've run Mesa 3.0B6 and its demos in a window with my Rush on a Red Hat
-5.1 system. It is a big hassle, but it can be done. I've only made Quake
-segfault, but I think that's from my libRush using the wrong libc.
-
-Yes, mixing libc5 and glibc is a major pain. I've been working to get
-all my libraries compiling correctly with this setup. Someone should
-make an RPM out of it and feed changes back to Brian once they get it
-all working. If no one else has done so by the time I get the rest of my
-stuff straightened out, I'll try to do it myself.
-
- - |Daryll
-
-
-
-*********************
-
-David Bucciarelli (tech.hmw@plus.it) writes:
-
-I'm using the Mesa-3.0beta7 and the RedHat 5.1 and QuakeII is
-working fine for me. I had only to make a small change to the
-Mesa-3.0/mklib.glide file, from:
-
-
- GLIDELIBS="-L/usr/local/glide/lib -lglide2x
--L/usr/i486-linux-libc5/lib -lm"
-
-to:
-
- GLIDELIBS="-L/usr/i486-linux-libc5/lib -lglide2x"
-
-and to make two symbolic links:
-
-[david@localhost Mesa]$ ln -s libMesaGL.so libMesaGL.so.2
-[david@localhost Mesa]$ ln -s libMesaGLU.so libMesaGLU.so.2
-
-I'm using the Daryll's Linux glide rpm for the Voodoo2 and glibc (it
-includes also the Glide for the libc5). I'm not using the /dev/3Dfx and
-running QuakeII as root with the following env. var:
-
-export
-LD_LIBRARY_PATH=/dsk1/home/david/src/gl/Mesa/lib:/usr/i486-linux-libc5/lib
-
-I think that all problems are related to the glibc, Quake will never
-work if you get the following output:
-
-[david@localhost Mesa]$ ldd lib/libMesaGL.so
- libglide2x.so => /usr/lib/libglide2x.so (0x400f8000)
- libm.so.6 => /lib/libm.so.6 (0x40244000)
- libc.so.6 => /lib/libc.so.6 (0x4025d000)
- /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x00000000)
-
-You must get the following outputs:
-
-[david@localhost Mesa]# ldd lib/libMesaGL.so
- libglide2x.so => /usr/i486-linux-libc5/lib/libglide2x.so
-(0x400f3000)
-
-[root@localhost quake2]# ldd quake2
- libdl.so.1 => /lib/libdl.so.1 (0x40005000)
- libm.so.5 => /usr/i486-linux-libc5/lib/libm.so.5 (0x40008000)
- libc.so.5 => /usr/i486-linux-libc5/lib/libc.so.5 (0x40010000)
-
-[root@localhost quake2]# ldd ref_gl.so
- libMesaGL.so.2 =>
-/dsk1/home/david/src/gl/Mesa/lib/libMesaGL.so.2 (0x400eb000)
- libglide2x.so => /usr/i486-linux-libc5/lib/libglide2x.so
-(0x401d9000)
- libX11.so.6 => /usr/i486-linux-libc5/lib/libX11.so.6
-(0x40324000)
- libXext.so.6 => /usr/i486-linux-libc5/lib/libXext.so.6
-(0x403b7000)
- libvga.so.1 => /usr/i486-linux-libc5/lib/libvga.so.1
-(0x403c1000)
- libm.so.5 => /usr/i486-linux-libc5/lib/libm.so.5 (0x403f5000)
- libc.so.5 => /usr/i486-linux-libc5/lib/libc.so.5 (0x403fd000)
-
-
-***********************
-
-Steve Davies (steve@one47.demon.co.uk) writes:
-
-
-Try using:
-
- export LD_LIBRARY_PATH=/usr/i486-linux-libc5/lib
- ./quake2 +set vid_ref gl
-
-to start the game... Works for me, but assumes that you have the
-compatability libc5 RPMs installed.
-
-
-***************************
-
-WWW resources - you may find additional Linux Quake help at these URLs:
-
-
-http://quake.medina.net/howto
-
-http://webpages.mr.net/bobz
-
-http://www.linuxgames.com/quake2/
-
-
-
-----------------------------------------------------------------------
+++ /dev/null
-
-
-Mesa Threads README
--------------------
-
-Thread safety was introduced in Mesa 2.6 by John Stone and
-Christoph Poliwoda.
-
-It was redesigned in Mesa 3.3 so that thread safety is
-supported by default (on systems which support threads,
-that is). There is no measurable penalty on single
-threaded applications.
-
-NOTE that the only _driver_ which is thread safe at this time
-is the OS/Mesa driver!
-
-
-At present the mthreads code supports three thread APIS:
- 1) POSIX threads (aka pthreads).
- 2) Solaris / Unix International threads.
- 3) Win32 threads (Win 95/NT).
-
-Support for other thread libraries can be added src/glthread.[ch]
-
-
-In order to guarantee proper operation, it is
-necessary for both Mesa and application code to use the same threads API.
-So, if your application uses Sun's thread API, then you should build Mesa
-using one of the targets for Sun threads.
-
-The mtdemos directory contains some example programs which use
-multiple threads to render to osmesa rendering context(s).
-
-Linux users should be aware that there exist many different POSIX
-threads packages. The best solution is the linuxthreads package
-(http://pauillac.inria.fr/~xleroy/linuxthreads/) as this package is the
-only one that really supports multiprocessor machines (AFAIK). See
-http://pauillac.inria.fr/~xleroy/linuxthreads/README for further
-information about the usage of linuxthreads.
-
-If you are interested in helping with thread safety work in Mesa
-join the Mesa developers mailing list and post your proposal.
-
-
-Regards,
- John Stone -- j.stone@acm.org johns@cs.umr.edu
- Christoph Poliwoda -- poliwoda@volumegraphics.com
-
-
-Version info:
- Mesa 2.6 - initial thread support.
- Mesa 3.3 - thread support mostly rewritten (Brian Paul)
projects / mesa.git / commitdiff