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The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
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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