docs/README.AMIWIN

   1 AMIGA AMIWIN PORT of MESA: THE OPENGL SOFTWARE EMULATION
   2 ========================================================
   3 Port by Victor Ng-Thow-Hing (victorng@dgp.toronto.edu)
   4 Original Author (Brian Paul (brianp@ssec.wisc.edu)
   5
   6 Dec.1 , 1995: Port of release Mesa 1.2.5
   7  - Modifications made to minimize changes to Mesa distribution.
   8
   9 Nov.25, 1995: Port of release Mesa 1.2.4
  10
  11
  12 HISTORY
  13 =======
  14 As a 3D graphics progammer, I was increasingly frustrated to see OpenGL
  15 appearing on so many platforms EXCEPT the Amiga. Up to now, the task
  16 of porting OpenGL directly from native Amiga drawing routines seemed like
  17 a daunting task. However, two important events made this port possible.
  18
  19 First of all, Brian Paul wrote Mesa, the OpenGL software emulator that
  20 can be found on many platforms - except the Amiga and Atari (who cares
  21 about the latter!). This was pretty ironic considering that Mesa was
  22 originally prototyped on an Amiga! The second great event was when
  23 Holger Kruse developed AmiWin, the X11R6 server for the Amiga (definitely
  24 register for this great piece of software) and released a development kit
  25 so one could compile X programs with SAS/C.
  26
  27 Since Mesa had X routines as its primitive drawing operations, this made
  28 a marriage of Mesa and Amiwin feasible. I copied over the sources from
  29 an ftp site, played with the code, wrote some Smakefiles, and voila,
  30 I had OpenGL programs displaying on my Amiga.
  31
  32 Although the speed is nothing to be impressed about, this port can be
  33 potentially useful to those who want to quickly test their code in
  34 wireframe or perhaps learn more about programming with the OpenGL API.
  35
  36 I hope Amiga developers will continue to write excellent software for
  37 their machine, especially more X clients for Amiwin. If you have any
  38 solutions so some of my problems in the porting notes, please send me
  39 some email!
  40
  41 See you around,
  42 Vic.
  43
  44 HOW TO CREATE THE LIBRARIES AND SAMPLE CODE
  45 ===========================================
  46
  47 Just run the shell script mklib.amiwin in the mesa directory. This will
  48 make all the libraries and copy them into the mesa/lib directory. If you
  49 don't want to compile everything, just go to the desired directory and
  50 type smake in that directory.
  51
  52 Change any of the variables in the smakefiles as necessary. You will REQUIRE
  53 the Amiwin development kit to compile these libraries since you need X11.LIB
  54 and the shareable X libraries. Some examples require the AmiTCP4.0
  55 net.lib static link library and related header files for unix related
  56 header files and functions like sleep().
  57
  58 HOW TO USE THE MESA LIBRARIES
  59 =============================
  60
  61 Study the Smakefiles in the demos, samples and book directories for the
  62 proper SAS/C options and linkable libraries to use. Basically aux calls
  63 require Mesaaux.LIB, gl calls require MesaGL.LIB, glu calls MesaGLU.LIB,
  64 tk calls Mesatk.LIB. There is a preliminary port of MesaGLUT.LIB toolkit
  65 available in the lib directory with the other Mesa libraries. However,
  66 it seems to cause crashes on some of the sample code. Someone else may want
  67 to attempt a more stable port.
  68
  69 PORTING NOTES TO AMIWIN
  70 =======================
  71
  72 My strategy of porting was to leave as much of the code untouched as
  73 possible. I surrounded any amiga specific changes with
  74 #ifdef AMIWIN ... #endif or #ifndef AMIWIN ... #endif preprocessor
  75 symbols. The code  was ported on an Amiga 2000, with Fusion 40 accelerator
  76 and a Picasso II graphics card. The SAS/C 6.56 compiler was used, with
  77 the AmiWin 2.16 X development kit.
  78
  79 All compilations were done for a 68040 CPU with 68882 math coprocessor for
  80 maximum  speed. Please edit the smakefile for other compilers.
  81 I wrote smakefiles for the directories I ported. I omitted the Windows
  82 and Widgets directories. The former is for MS Windows and the latter
  83 requires Motif, which is not easily available for the Amiga.
  84
  85 Here are the changes I did per directory:
  86
  87 * mesa
  88 Nov. 25, 1995 v 1.2.4
  89   - added a mklib.amiwin shell script that will make all the libraries and
  90     sample code for Mesa
  91   - created this readme file: readme.AMIGA
  92
  93 * mesa/include
  94 Dec. 1, 1995 v 1.2.5
  95   - added the following to GL/xmesa.h
  96      #ifdef AMIWIN
  97      #include <pragmas/xlib_pragmas.h>
  98      extern struct Library *XLibBase;
  99      #endif
 100 NET CHANGE: xmesa.h
 101
 102 * mesa/src
 103 Nov. 25, 1995 v 1.2.4
 104   - added the necessary pragma calls for X functions to the following:
 105     xmesa1.c, xmesa2.c, xmesa3.c, xfonts.c, glx.c
 106     This prevents undefined symbols errors during the linking phase for
 107     X library calls
 108   - created smakefile
 109 Dec.  1, 1995 v 1.2.5
 110   - removed AMIWIN includes from xmesa1.c, xmesa2.c, xmesa3.c, xfonts.c,
 111     glx.c since they are now defined in include/GL/xmesa.h
 112 NET CHANGE: smakefile
 113
 114 * mesa/src-tk
 115 Nov. 25, 1995 v 1.2.4
 116   - added the necessary pragma calls for X functions to the following:
 117     private.h
 118   - created smakefile
 119 Dec.  1, 1995 v 1.2.5
 120   - removed AMIWIN includes from private.h since it is now defined in
 121     include/GL/xmesa.h
 122 NET CHANGE: smakefile
 123
 124 * mesa/src-glu
 125 Nov. 25, 1995 v 1.2.4
 126   - created smakefile
 127 NET CHANGE: smakefile
 128
 129 * mesa/src-aux
 130 Nov. 25, 1995 v 1.2.4
 131   - added the necessary pragma calls for X functions to the following:
 132     glaux.c
 133   - created smakefile
 134 NET CHANGE: glaux.c, smakefile
 135
 136 * mesa/demos
 137 Nov. 25, 1995 v 1.2.4
 138   - added the necessary pragma calls for X functions to the following:
 139     xdemo.c, glxdemo.c, offset.c
 140   - created smakefile
 141   - put #ifndef AMIWIN ... #endif around sleep() calls in xdemo.c since
 142     they are not part of AmigaDOS.
 143 Dec.  1, 1995 v 1.2.5
 144   - removed AMIWIN defines from xdemo.c, glxdemo.c, offset.c since
 145     already defined in include/GL/xmesa.h
 146   - modified Smakefile to include header and includes from the AmiTCP4.0
 147     net.lib linkable library to provide unix-compatible sys/time.h and
 148     the sleep() function
 149     - removed AMIWIN defines in xdemo.c since sleep() now defined
 150 NET CHANGE: smakefile
 151
 152 * mesa/samples
 153 Nov. 25, 1995 v 1.2.4
 154   - added the necessary pragma calls for X functions to the following:
 155     oglinfo.c
 156   - created smakefile
 157   - put #ifndef AMIWIN ... #endif around sleep() in blendxor.c
 158   - removed olympic from smakefile targets since <sys/time.h> not defined
 159 Dec.  1, 1995 v 1.2.5
 160   - removed AMIWIN defines from oglinfo.c, since already defined in
 161     include/GL/xmesa.h
 162   - modified Smakefile to include header and includes from the AmiTCP4.0
 163     net.lib linkable library to provide unix-compatible sys/time.h and
 164     the sleep() function
 165     - removed AMIWIN defines in blendxor.c for sleep()
 166     - added AMIWIN defines around _MACHTEN_ in olympic.c since xrandom()
 167       functions are not defined in any libraries
 168     - added olympic back into the Smakefile targets
 169 NET CHANGE: smakefile, olympic.c
 170
 171 * mesa/book
 172 Nov. 25, 1995 v 1.2.4
 173 - created smakefile
 174 - removed accpersp and dof from smakefile targets since the SAS/C compile seems to
 175   confuse the near,far variables with near/far memory models.
 176 NET CHANGE: smakefile
 177
 178 * mesa/windows
 179 Dec.  1, 1995 v 1.2.5
 180 - Removed directory to save space since this is only needed for Windows based
 181   machines.