kc3-lang/SDL/docs/README-directfb.md

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  Date : 2015-02-10T16:28:56
  

  the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here. Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here. Not 5 or 10 depending on the architecture. More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802

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• docs/README-directfb.md

• DirectFB
  ========
  
  Supports:
  
  - Hardware YUV overlays
  - OpenGL - software only
  - 2D/3D accelerations (depends on directfb driver)
  - multiple displays
  - windows
  
  What you need:
  
  * DirectFB 1.0.1, 1.2.x, 1.3.0
  * Kernel-Framebuffer support: required: vesafb, radeonfb .... 
  * Mesa 7.0.x	   - optional for OpenGL
  
  /etc/directfbrc
  
  This file should contain the following lines to make
  your joystick work and avoid crashes:
  ------------------------
  disable-module=joystick
  disable-module=cle266
  disable-module=cyber5k
  no-linux-input-grab
  ------------------------
  
  To disable to use x11 backend when DISPLAY variable is found use
  
  export SDL_DIRECTFB_X11_CHECK=0
  
  To disable the use of linux input devices, i.e. multimice/multikeyboard support,
  use
  
  export SDL_DIRECTFB_LINUX_INPUT=0
  
  To use hardware accelerated YUV-overlays for YUV-textures, use:
  
  export SDL_DIRECTFB_YUV_DIRECT=1
  
  This is disabled by default. It will only support one 
  YUV texture, namely the first. Every other YUV texture will be
  rendered in software.
  
  In addition, you may use (directfb-1.2.x)
  
  export SDL_DIRECTFB_YUV_UNDERLAY=1
  
  to make the YUV texture an underlay. This will make the cursor to
  be shown.
  
  Simple Window Manager
  =====================
  
  The driver has support for a very, very basic window manager you may
  want to use when running with "wm=default". Use
  
  export SDL_DIRECTFB_WM=1
  
  to enable basic window borders. In order to have the window title rendered,
  you need to have the following font installed:
  
  /usr/share/fonts/truetype/freefont/FreeSans.ttf
  
  OpenGL Support
  ==============
  
  The following instructions will give you *software* OpenGL. However this
  works at least on all directfb supported platforms.
  
  As of this writing 20100802 you need to pull Mesa from git and do the following:
  
  ------------------------
  git clone git://anongit.freedesktop.org/git/mesa/mesa
  cd mesa 
  git checkout 2c9fdaf7292423c157fc79b5ce43f0f199dd753a
  ------------------------
  
  Edit configs/linux-directfb so that the Directories-section looks like
  ------------------------
  # Directories
  SRC_DIRS     = mesa glu 
  GLU_DIRS     = sgi
  DRIVER_DIRS  = directfb
  PROGRAM_DIRS = 
  ------------------------
  
  make linux-directfb
  make
  
  echo Installing - please enter sudo pw.
  
  sudo make install INSTALL_DIR=/usr/local/dfb_GL
  cd src/mesa/drivers/directfb
  make
  sudo make install INSTALL_DIR=/usr/local/dfb_GL
  ------------------------
  
  To run the SDL - testprograms:
  
  export SDL_VIDEODRIVER=directfb
  export LD_LIBRARY_PATH=/usr/local/dfb_GL/lib
  export LD_PRELOAD=/usr/local/dfb_GL/libGL.so.7
  
  ./testgl
  
  

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