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Date: Sat, 2 Aug 2003 16:22:51 +0300

From: "Mike Gorchak"
Subject: New patches for QNX6

Here my patches for the SDL/QNX:

QNXSDL.diff - diff to non-QNX related sources:

- updated BUGS file, I think QNX6 is now will be officially supported
- - added shared library support for QNX, and removed dependency between the ALSA and QNX6.
- SDL_audio.c - added QNX NTO sound bootstrap insted of ALSA's.
- SDL_sysaudio.h - the same.
- SDL_nto_audio.c - the same.
- SDL_video.c - right now, QNX doesn't offer any method to obtain pointers to the OpenGL functions by function name, so they must be hardcoded in library, otherwise OpenGL will not be supported.
- testsprite.c - fixed: do not draw vertical red line if we are in non-double-buffered mode.

sdlqnxph.tar.gz - archive of the ./src/video/photon/* . Too many changes in code to make diffs :) :

+ Added stub for support hide/unhide window event
+ Added full YUV overlays support.
+ Added window maximize support.
+ Added mouse wheel events.
+ Added support for some specific key codes in Unicode mode (like ESC).
+ Added more checks to the all memory allocation code.
+ Added SDL_DOUBLEBUF support in all fullscreen modes.
+ Added fallback to window mode, if desired fullscreen mode is not supported.
+ Added stub support for the GL_LoadLibrary and GL_GetProcAddress functions.
+ Added resizable window support without caption.
! Fixed bug in the Ph_EV_EXPOSE event handler, when rectangles to update is 0 and when width or height of the rectangle is 0.
! Fixed bug in the event handler code. Events has not been passed to the window widget handler.
! Fixed codes for Win keys (Super/Hyper/Menu).
! Fixed memory leak, when deallocation palette.
! Fixed palette emulation code bugs.
! Fixed fullscreen and hwsurface handling.
! Fixed CLOSE button bug. First event was passed to the handler, but second terminated the application. Now all events passed to the application correctly.
- Removed all printfs in code, now SDL_SetError used instead of them.
- Disabled ToggleFullScreen function.

README.QNX - updated README.QNX file. Added much more issues.
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slouken committed Aug 4, 2003
1 parent cd70bf5 commit 11fbf1b13a4e4216ad07fb009515cf2eda9ca2e3

File 2 of 19 in 11fbf1b

@@ -1,27 +1,94 @@
README by Mike Gorchak <>, <>
Last changed at 29 Jul 2003.


OpenGL in window mode works well and stable, in fullscreen
mode too, but fullscreen mode has not been heavily tested.
If you have QNX RtP 6.1.0 w/ or w/o Patch A you must download
new Photon3D runtime from The versions
of OS before 6.1.0 are not supported.

1. While creating OpenGL context software renderer mode is
artificially selected (QSSL made acceleration only for Voodoo
boards in fullscreen mode, sorry but I don't have this board,
if you want acceleration - you may remove some line in source
2. Photon has some errors in detecting how much bits per pixel
videomode has.
3. No shared libraries yet. We need manually set flag to
'configure' --disable-shared.
4. Due to Photon API limitation, flag SDL_HWSURFACE supported on-
ly in case of desktop bpp is equal requested bpp in window mo-
mode too, but fullscreen mode has not been heavily tested yet.
If you have QNX RtP version 6.1.0 and above you must download
new Photon3D runtime from or install it
from public repository or from public CD, available with QNX. The
versions of OS before 6.1.0 are not supported.
While creating OpenGL context software renderer mode is
artificially selected (QSSL made acceleration only for Voodoo
boards in fullscreen mode, sorry but I don't have this board to
test OpenGL - maybe it work or maybe not :)). If you want accele-
ration - you may remove some line in source code: find the file
SDL_ph_video.c and remove the following


line in the ph_SetupOpenGLContext() function or change argument

Wheel and multibutton mouses:

Photon emitting keyboard events (key up and down) when moved
mouse wheel. But key_scan field appears valid according to flags,
and it contain zero. It is base method of detecting mouse wheel
events under photon. It looks like a hack, but it works for me :)
on different PC configurations.

I'm tested it on:

1. Genius Optical NetScroll/+ (1 wheel)
2. A4Tech Optical GreatEye WheelMouse, model: WOP-35. (2 wheels +
2 additional buttons). Wheel for vertical scrolling works as
usual, but second wheel for horizontal scrolling emitting two
consequented events up or down, so it can provide more fast
scrolling then the first wheel. Additional buttons doesn't
emitting any events, but its look like handled by photon in
unusual way - like click to front, but works not with any win-
dow, looks like bug-o-feature :).

CDROM handling issues:

Access to CDROM can be provided only with 'root' previleges.
I can't do anything with this fact. /dev/cd0 have the brw-------
flags and root:root rights.

Video Overlays:

Overlays can flickering during the window movement, resizing,
etc. It happens because photon driver updates the real window
contents behind the overlay, then draws the temporary chroma key
color over window contents. It can be done without the chroma key
using but it cause overlay will be always on top. So flickering
during the movement much better in that case.
Double buffering code temporary disabled in the photon driver
code, beacuse on my GF2-MX it cause accidently buffer switch,
which going to the old frame showing. S3 Savage3D have the same
problem, but ATI Rage 128 has not this problem. I think it can be
fixed later. Current code works very fine, so maybe double buffe-
ring is not needed right now.
Something strange appears when you tried to move window with
overlay beyond the left border of the screen. Overlay trying to
stay at position x=0, but when tried to move it a bit more it
jumps at posituin x=-60. Really strange, looks like overlay
doesn't love the negotive coordinates.

Shared library building:

Shared library can be built, but before running
script you need manually delete the libtool m4 stuff from
the acinclude.m4 file (it comes after ESD detection code up to
end of the file). Because libtool stuff in the acinclude.m4 file
very old and doesn't know anything about the QNX. Just remove it
and run script.

Some building issues:

Feel free to not pass --disable-shared option to configure,
if you read comment above about 'Shared library building'. Other-
wise this option is strongly recomended, because the sdl-config
script will be unfunctional.

Run configure script without x11 support, e.g.:

a) for OpenGL support:
@@ -42,3 +109,4 @@ support, e.g.:
--with-sdl-exec-prefix=/usr/local \
--prefix=/usr/local --without-x

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