README.QNX
author Sam Lantinga <slouken@libsdl.org>
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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 - configure.in - 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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README by Mike Gorchak <mike@malva.ua>, <lestat@i.com.ua>
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Last changed at 29 Jul 2003.
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=========================================================================
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OpenGL:
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    OpenGL in window mode  works well  and  stable, in fullscreen
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mode too, but fullscreen mode has not been heavily tested yet.
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    If you have QNX RtP version 6.1.0 and above you must download
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new Photon3D runtime from http://developers.qnx.com or install it
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from public repository or from public CD, available with QNX. The
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versions of OS before 6.1.0 are not supported.
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    While  creating  OpenGL  context  software  renderer  mode is
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artificially selected (QSSL  made  acceleration  only for  Voodoo
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boards in fullscreen mode, sorry but I  don't have  this board to
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test OpenGL - maybe it work or maybe not :)). If you want accele-
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ration - you may remove some line in source code: find  the  file
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SDL_ph_video.c and remove the following
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    OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FORCE_SW;
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line in the ph_SetupOpenGLContext() function or  change  argument
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to the PHOGL_ATTRIB_FORCE_HW or PHOGL_ATTRIB_FAVOR_HW.
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=========================================================================
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Wheel and multibutton mouses:
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    Photon emitting keyboard events (key up and down) when  moved
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mouse wheel. But key_scan field appears valid according to flags,
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and it contain zero. It is base method of detecting  mouse  wheel
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events under photon. It looks like a hack, but it works for me :)
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on different PC configurations.
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I'm tested it on:
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1. Genius Optical NetScroll/+ (1 wheel)
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2. A4Tech Optical GreatEye WheelMouse, model: WOP-35. (2 wheels +
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   2 additional buttons). Wheel for vertical scrolling  works  as
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   usual, but second wheel for horizontal scrolling emitting  two
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   consequented events up or down, so it can  provide  more  fast
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   scrolling then the  first  wheel. Additional  buttons  doesn't
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   emitting any events, but its look like  handled by  photon  in
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   unusual way - like click to front, but works not with any win-
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   dow, looks like bug-o-feature :).
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=========================================================================
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CDROM handling issues:
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    Access to CDROM can be provided only with 'root'  previleges.
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I can't do anything with this fact. /dev/cd0 have  the brw-------
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flags and root:root rights.
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=========================================================================
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Video Overlays:
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    Overlays can flickering during the window movement, resizing,
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etc. It happens because photon driver  updates  the  real  window
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contents behind the overlay, then draws the temporary  chroma key
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color over window contents. It can be done without the chroma key
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using but it cause overlay will be  always  on top. So flickering
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during the movement much better in that case.
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    Double buffering code temporary disabled in the photon driver
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code, beacuse on my GF2-MX it  cause  accidently  buffer  switch,
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which going to the old frame showing. S3 Savage3D have  the  same
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problem, but ATI Rage 128 has not this problem. I think it can be
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fixed later. Current code works very fine, so maybe double buffe-
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ring is not needed right now.
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    Something strange appears when you tried to move window  with
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overlay beyond the left border of the screen. Overlay  trying  to
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stay at position x=0, but when tried to move  it  a  bit  more it
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jumps  at  posituin  x=-60. Really  strange, looks  like  overlay
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doesn't love the negotive coordinates.
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=========================================================================
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Shared library building:
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    Shared  library can be  built, but before  running autogen.sh
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script you  need  manually  delete  the  libtool  m4  stuff  from
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the acinclude.m4 file (it comes after ESD  detection  code  up to
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end of the file). Because libtool stuff in the  acinclude.m4 file
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very old and doesn't know anything about the QNX. Just  remove it
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and run autogen.sh script.
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=========================================================================
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Some building issues:
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    Feel free to not pass --disable-shared option  to  configure,
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if you read comment above about 'Shared library building'. Other-
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wise this option is strongly  recomended, because  the sdl-config
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script will be unfunctional.
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    Run configure script without x11 support, e.g.:
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    a) for OpenGL support:
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    ./configure --prefix=/usr/local \
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                --disable-video-x11 \
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                --disable-shared
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    b) without OpenGL support:
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    ./configure --prefix=/usr/local \
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                --disable-video-x11 \
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                --disable-shared    \
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                --disable-video-opengl
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    In test directory  also run  ./configure  script  without x11
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support, e.g.:
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    ./configure  --with-sdl-prefix=/usr/local      \
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                 --with-sdl-exec-prefix=/usr/local \
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                 --prefix=/usr/local --without-x
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