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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
The `/etc/directfbrc` 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 this:
```
# Directories
SRC_DIRS = mesa glu
GLU_DIRS = sgi
DRIVER_DIRS = directfb
PROGRAM_DIRS =
```
Then do the following:
```
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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