Clean up formatting in README-directfb.md

docs/README-directfb.md

@@ -15,29 +15,34 @@ What you need:
 * Kernel-Framebuffer support: required: vesafb, radeonfb .... 
 * Mesa 7.0.x	   - optional for OpenGL
 
-/etc/directfbrc
+The `/etc/directfbrc` file should contain the following lines to make
-
-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
@@ -45,7 +50,9 @@ 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.
@@ -54,14 +61,18 @@ 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
+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
 ==============
@@ -71,21 +82,25 @@ 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
+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
 
@@ -95,13 +110,14 @@ 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
-
+```