author | Sam Lantinga <slouken@libsdl.org> |
Mon, 10 Jul 2006 21:04:37 +0000 | |
changeset 1895 | c121d94672cb |
parent 1850 | d5d3a6fe05a1 |
child 3244 | 7c73d5b5a0d6 |
permissions | -rw-r--r-- |
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SDL on OS/2 |
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=========== |
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Last updated on May. 1, 2006. |
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1. How to compile? |
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------------------ |
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To compile this, you'll need the followings installed: |
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- The OS/2 Developer's Toolkit |
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- The OpenWatcom compiler |
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(http://www.openwatcom.org) |
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- The FSLib library |
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(ftp://ftp.netlabs.org/pub/SDL) |
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First of all, you have to unzip the Watcom-OS2.zip file. This will result in a |
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file called "makefile" and a file called "setvars.cmd" in this folder (and some |
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more files...). |
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Please edit the second, fourth and fifth lines of setvars.cmd file |
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to set the folders where the toolkit, the OW compiler and the FSLib are. |
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You won't need NASM yet (The Netwide Assembler), you can leave that line. |
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Run setvars.cmd, and you should get a shell in which you can |
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compile SDL. |
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Check the "makefile" file. There is a line in there which determines if the |
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resulting SDL.DLL will be a 'debug' or a 'release' build. The 'debug' version |
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is full of printf()'s, so if something goes wrong, its output can help a lot |
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for debugging. |
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Then run "wmake". |
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This should create the SDL.DLL and the corresponding SDL.LIB file here. |
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To test applications, it's a good idea to use the 'debug' build of SDL, and |
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redirect the standard output and standard error output to files, to see what |
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happens internally in SDL. |
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(like: testsprite >stdout.txt 2>stderr.txt) |
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To rebuild SDL, use the following commands in this folder: |
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wmake clean |
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wmake |
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2. How to compile the testapps? |
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------------------------------- |
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Once you have SDL.DLL compiled, navigate into the 'test' folder, copy in there |
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the newly built SDL.DLL, and copy in there FSLib.DLL. |
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Then run "wmake" in there to compile some of the testapps. |
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3. What is missing? |
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The following things are missing from this SDL implementation: |
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- MMX, SSE and 3DNOW! optimized video blitters? |
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- HW Video surfaces |
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- OpenGL support |
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4. Special Keys / Full-Screen support |
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------------------------------------- |
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There are two special hot-keys implemented: |
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- Alt+Home switches between fullscreen and windowed mode |
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- Alt+End simulates closing the window (can be used as a Panic key) |
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Only the LEFT Alt key will work. |
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5. Joysticks on SDL/2 |
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--------------------- |
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The Joystick detection only works for standard joysticks (2 buttons, 2 axes |
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and the like). Therefore, if you use a non-standard joystick, you should |
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specify its features in the SDL_OS2_JOYSTICK environment variable in a batch |
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file or CONFIG.SYS, so SDL applications can provide full capability to your |
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device. The syntax is: |
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SET SDL_OS2_JOYSTICK=[JOYSTICK_NAME] [AXES] [BUTTONS] [HATS] [BALLS] |
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So, it you have a Gravis GamePad with 4 axes, 2 buttons, 2 hats and 0 balls, |
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the line should be: |
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SET SDL_OS2_JOYSTICK=Gravis_GamePad 4 2 2 0 |
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If you want to add spaces in your joystick name, just surround it with |
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quotes or double-quotes: |
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SET SDL_OS2_JOYSTICK='Gravis GamePad' 4 2 2 0 |
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or |
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SET SDL_OS2_JOYSTICK="Gravis GamePad" 4 2 2 0 |
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Notive However that Balls and Hats are not supported under OS/2, and the |
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value will be ignored... but it is wise to define these correctly because |
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in the future those can be supported. |
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Also the number of buttons is limited to 2 when using two joysticks, |
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4 when using one joystick with 4 axes, 6 when using a joystick with 3 axes |
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and 8 when using a joystick with 2 axes. Notice however these are limitations |
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of the Joystick Port hardware, not OS/2. |
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6. Proportional windows |
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----------------------- |
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For some SDL applications it can be handy to have proportional windows, so |
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the windows will keep their aspect ratio when resized. |
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This can be achieved in two ways: |
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- Before starting the given SDL application, set the |
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SDL_USE_PROPORTIONAL_WINDOW environment variable to something, e.g.: |
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SET SDL_USE_PROPORTIONAL_WINDOW=1 |
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dosbox.exe |
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- If you have a HOME environment variable set, then SDL will look for a file |
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in there called ".sdl.proportionals". If that file contains the name of the |
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currently running SDL executable, then that process will have proportional |
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windows automatically. |
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Please note that this file is created automatically with default values |
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at the first run. |
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7. Audio in SDL applications |
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---------------------------- |
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Audio effects are one of the most important features in games. Creating audio |
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effects in sync with the game and without hickups and pauses in the audio are |
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very important things. |
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However there are multithreaded SDL applications that have tight loops as their |
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main logic loop. This kills performance in OS/2, and takes too much CPU from |
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other threads in the same process, for example from the thread to create the |
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sound effects. |
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For this reason, the OS/2 port of SDL can be instructed to run the audio thread |
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in high priority, which makes sure that there will be enough time for the |
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processing of the audio data. |
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At default, SDL/2 runs the audio thread at ForegroundServer+0 priority. Well |
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written and well behaving SDL applications should work well in this mode. |
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For other applications, you can tell SDL/2 to run the audio thread at |
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TimeCritical priority by setting an env.variable before starting the SDL app: |
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SET SDL_USE_TIMECRITICAL_AUDIO=1 |
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Please note that this is a bit risky, because if the SDL application runs a |
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tight infinite loop in this thread, this will make the whole system |
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unresponsive, so use it with care, and only for applications that need it! |
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8. Next steps... |
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Things to do: |
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- Implement missing stuffs (look for 'TODO' string in source code!) |
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- Finish video driver (the 'wincommon' can be a good example for missing |
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things like application icon and so on...) |
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- Enable MMX/SSE/SSE2 acceleration functions |
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- Rewrite CDROM support using DOS Ioctl for better support. |
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9. Contacts |
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You can contact the developers for bugs: |
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Area Developer email |
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General (Audio/Video/System) Doodle doodle@scenergy.dfmk.hu |
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CDROM and Joystick Caetano daniel@caetano.eng.br |
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Notice however that SDL/2 is 'in development' stage so ... if you want to help, |
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please, be our guest and contact us! |
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10. Changelog of the OS/2 port |
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------------------------------ |
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Version 1.2 - 2006-05-01 - Doodle |
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- Modified makefile system to have only one makefile |
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- Included FSLib headers, DLL and LIB file |
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Version 1.2 - 2006-02-26 - Doodle |
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- Updated the official SDL version with the OS/2 specific changes. |
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- Added support for real unicode keycode conversion. |
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Version 1.2.7 - 2006-01-20 - Doodle |
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- Added support for selectively using timecritical priority for |
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audio threads by SDL_USE_TIMECRITICAL_AUDIO environment variable. |
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(e.g.: |
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SET SDL_USE_TIMECRITICAL_AUDIO=1 |
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dosbox.exe |
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208 |
) |
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209 |
|
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210 |
Version 1.2.7 - 2005-12-22 - Doodle |
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211 |
- Added support for proportional SDL windows. |
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212 |
There are two ways to have proportional (aspect-keeping) windows for |
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213 |
a given SDL application: Either set the SDL_USE_PROPORTIONAL_WINDOW |
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environment variable to something before starting the application |
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215 |
(e.g.: |
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216 |
SET SDL_USE_PROPORTIONAL_WINDOW=1 |
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217 |
dosbox.exe |
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218 |
) |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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219 |
or, if you have the HOME environment variable set, then SDL.DLL will |
1442
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220 |
create a file in that directory called .sdl.proportionals, and you can |
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221 |
put there the name of executable files that will be automatically made |
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222 |
proportional. |
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223 |
|
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224 |
Version 1.2.7 - 2005-10-14 - Doodle |
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225 |
- Enabled Exception handler code in FSLib to be able to restore original |
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226 |
desktop video mode in case the application crashes. |
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227 |
- Added the missing FSLib_Uninitialize() call into SDL. |
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228 |
(The lack of it did not cause problems, but it's cleaner this way.) |
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229 |
- Fixed a mouse problem in Fullscreen mode where any mouse click |
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230 |
re-centered the mouse. |
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231 |
|
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232 |
Version 1.2.7 - 2005-10-09 - Doodle |
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233 |
- Implemented window icon support |
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234 |
|
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235 |
Version 1.2.7 - 2005-10-03 - Doodle |
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236 |
- Reworked semaphore support again |
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237 |
- Tuned thread priorities |
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238 |
|
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239 |
Version 1.2.7 - 2005-10-02 - Doodle |
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240 |
- Added support for custom mouse pointers |
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241 |
- Fixed WM_CLOSE processing: give a chance to SDL app to ask user... |
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242 |
- Added support for MMX-accelerated audio mixers |
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243 |
- Other small fixes |
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244 |
|
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245 |
Version 1.2.7 - 2005-09-12 - Doodle |
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246 |
- Small fixes for DosBox incorporated into public release |
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247 |
- Fixed semaphore support (SDL_syssem.c) |
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248 |
- Fixed FSLib to have good clipping in scaled window mode, |
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249 |
and to prevent occasional desktop freezes. |
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250 |
|
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251 |
Version 1.2.7 - 2004-09-08a - Caetano |
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252 |
- Improved joystick support (general verifications about hardware). |
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253 |
- Added support up to 8 buttons in 2 axes joysticks and 6 buttons in 3 axes joysticks. |
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254 |
- Added support to environment variable SDL_OS2_JOYSTICK to specify a joystick. |
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255 |
- Improved Joystick test to handle every type of joystick and display only relevant information. |
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256 |
- Merged with Doodle 2004-09-08 |
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257 |
- Little tid up in README.OS2 |
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258 |
- Added explanation about SDL_OS2_JOYSTICK environment variable on README.OS2 |
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259 |
|
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260 |
Version 1.2.7 - 2004-09-07 - Caetano |
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261 |
- Merged with changes in headers for GCC compiling. |
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262 |
- Added Joystick support using basic IBM GAME$ support, allowing it to work with all joystick drivers since OS/2 2.1. |
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263 |
- Improved joystick detection (hacked!). OS/2 do not allow real joystick detection, so... |
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264 |
- Modified makefile in test to compile "testjoystick". Anyway, it's useless, since it seems to cause a lot of trouble in OS/2 (because os video routines, not Joystick support). |
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265 |
- Created separated Joystick test program to test only joystick functions. |
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266 |
- Improved joystick auto-centering. |
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267 |
- Improved the coordinate correction routine to use two scale factors for each axis. |
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268 |
|
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269 |
Version 1.2.7 - 2004-07-05 - Caetano |
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270 |
- Corrected the time returned by status in CDROM support (it was incorrect) |
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271 |
- Added the testcdrom.c and corrected the linking directive (it was causing an error) |
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272 |
|
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273 |
Version 1.2.7 - 2004-07-02a - Caetano |
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274 |
- Corrected a little problem in a comment at SDL-1.2.7\test\torturethread.c, line 18 (missing */, nested comment) |
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275 |
- Added CDROM support to tree (SDL-1.2.7\src\cdrom\os2\SDL_syscdrom.c) |
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276 |
- Modified makefile (SDL-1.2.7\src\makefiles.wat and SDL-1.2.7\watcom.mif) to build with CDROM support |
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277 |
- Added the "extra" SDL_types.h forgotten in 2004-07-02 version. |
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278 |
|
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<End-Of-File> |