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diff --git a/distrib/sdl-1.2.15/README.QNX b/distrib/sdl-1.2.15/README.QNX new file mode 100644 index 0000000..995afbe --- /dev/null +++ b/distrib/sdl-1.2.15/README.QNX @@ -0,0 +1,155 @@ +README.QNX by Mike Gorchak <mike@malva.ua>, <lestat@i.com.ua> +Last changed at 24 Apr 2004. + +====================================================================== +Table of Contents: + +1. OpenGL. +2. Wheel and multi-button mouses. +3. CDROM handling issues. +4. Hardware video overlays. +5. Shared library building. +6. Some building issues. +7. Environment variables. + +====================================================================== +1. OpenGL: + + OpenGL works well and is stable, but fullscreen mode has not been +heavily tested yet. + If you have QNX RtP version 6.1.0 or above you must download the +Photon3D runtime from http://developers.qnx.com or install it from the +public repository or from the public CD, available with QNX. OS versi- +ons below 6.1.0 are not supported. + When creating an OpenGL context, software renderer mode is artifi- +cially selected (QSSL made acceleration only for Voodoo boards in +fullscreen mode, sorry but I don't have this board to test OpenGL - +maybe it works or maybe not :)). If you want acceleration - you can +remove one line in the source code: find the file SDL_ph_image.c and +remove the following + + OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FORCE_SW; + +line in the ph_SetupOpenGLContext() function or change the argument to +PHOGL_ATTRIB_FORCE_HW or PHOGL_ATTRIB_FAVOR_HW. + +====================================================================== +2. Wheel and multi-button mouses: + + Photon emits keyboard events (key up and down) when the mouse +wheel is moved. The key_scan field appears valid, and it contains zero. +That is a basic method of detecting mouse wheel events under Photon. +It looks like a hack, but it works for me :) on various PC configura- +tions. + +I've tested it on: + +1. Genius Optical NetScroll/+ PS/2 (1 wheel) +2. A4Tech Optical GreatEye WheelMouse PS/2, model: WOP-35. (2 wheels + + 2 additional buttons). The wheel for vertical scrolling works as + usual, but the second wheel for horizontal scrolling emits two se- + quential events up or down, so it can provide faster scrolling than + the first wheel. Additional buttons don't emit any events, but it + looks like they're handled by photon in an unusual way - like click + to front, but works not with any window, looks like a fun bug-o-fe- + ature :). + +====================================================================== +3. CDROM handling issues: + + Access to CDROM can only be provided with 'root' privileges. I +can't do anything about that, /dev/cd0 has brw------- permissions and +root:root rights. + +====================================================================== +4. Hardware video overlays: + + Overlays can flicker during window movement, resizing, etc. It +happens because the photon driver updates the real window contents be- +hind the overlay, then draws the temporary chroma key color over the +window contents. It can be done without using the chroma key but that +causes the overlay to always be on top. So flickering during window +movement is preferred instead. + Double buffering code is temporarily disabled in the photon driver +code, because on my GF2-MX it can accidentally cause a buffer switch, +which causes the old frame to show. S3 Savage4 has the same problem, +but ATI Rage 128 doesn't. I think it can be fixed later. Current code +works very well, so maybe double buffering is not needed right now. + Something strange happens when you try to move the window with the +overlay beyond the left border of the screen. The overlay tries to +stay at position x=0, but when attempting to move it a bit more it +jumps to position x=-60 (on GF2-MX, on ATI Rage128 this value a bit +smaller). It's really strange, looks like the overlay doesn't like +negative coordinates. + +======================================================================= +5. Shared library building: + + A shared library can be built, but before running the autogen.sh +script you must manually delete the libtool.m4 stuff from the acinclu- +de.m4 file (it comes after the ESD detection code up to the end of the +file), because the libtool stuff in the acinclude.m4 file was very old +in SDL distribution before the version 1.2.7 and doesn't knew anything +about QNX. SDL 1.2.7 distribution contains the new libtool.m4 script, +but anyway it is broken :), Just remove it, then run "libtoolize +--force --copy", delete the file aclocal.m4 if it is exists and after +that run the autogen.sh script. SDL 1.2.8 contains fixed libtool.m4, +ltmain.sh and config.sub files, so you can just run the autogen.sh +script. + +====================================================================== +6. Some building issues: + + Feel free to not use the --disable-shared configure option if you' +ve read the above comment about 'Shared library building'. Otherwise +this option is strongly recommended, as without it the sdl-config +script will be broken. + + Run the configure script without x11 support, e.g.: + + a) for OpenGL support: + ./configure --prefix=/usr \ + --disable-video-x11 \ + --disable-shared + + b) without OpenGL support: + ./configure --prefix=/usr \ + --disable-video-x11 \ + --disable-shared \ + --disable-video-opengl + + And of course dont forget to specify --disable-debug, which is on +by default, to disable debug and enable the expensive optimizations. + + In the test directory also run the ./configure script without +x11 support, e.g.: + + ./configure --with-sdl-prefix=/usr \ + --with-sdl-exec-prefix=/usr \ + --prefix=/usr --without-x + +====================================================================== +7. Environment variables: + + Please note that the photon driver is sensible to the following +environmental variables: + + * SDL_PHOTON_FULLSCREEN_REFRESH - this environment variable controls +the refresh rate in all fullscreen modes. Be carefull !!! Photon +drivers usually do not checking the maximum refresh rate, which video +adapter or monitor supports. + + * SDL_VIDEO_WINDOW_POS - can be set in the "X,Y" format. If X and Y +coordinates are bigger than the current desktop resolution, then win- +dow positioning across virtual consoles is activated. If X and Y are +smaller than the desktop resolution then window positioning in the +current console is activated. The word "center" can be used instead of +coordinates, it produces the same behavior as SDL_VIDEO_CENTERED +environmental variable. + + * SDL_VIDEO_CENTERED - if this environmental variable exists then the +window centering is perfomed in the current virtual console. + +Notes: The SDL_VIDEO_CENTERED enviromental variable has greater pri- +ority than the SDL_VIDEO_WINDOW_POS in case if both variables are sup- +plied to the application. |