1 AMIGA AMIWIN PORT of MESA: THE OPENGL SOFTWARE EMULATION 2 ======================================================== 3 Port by Victor Ng-Thow-Hing (victorng (a] dgp.toronto.edu) 4 Original Author (Brian Paul (brianp (a] 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. 182
