DFB运行的时候，用help可以看到。
DirectFB options:
system=<system> Specify the system (FBDev, SDL, etc.)
fbdev=<device> Open <device> instead of /dev/fb0
busid=<id> Specify the bus location of the graphics card (default 1:0:0)
mode=<width>x<height> Set the default resolution
scaled=<width>x<height> Scale the window to this size for 'force-windowed' apps
depth=<pixeldepth> Set the default pixel depth
pixelformat=<pixelformat> Set the default pixel format
surface-shmpool-size=<kb> Set the size of the shared memory pool used
for shared system memory surfaces.
session=<num> Select multi app world (zero based, -1 = new)
remote=<host>[:<session>] Select remote session to connect to
primary-layer=<id> Select an alternative primary layer
primary-only Tell application only about the primary layer
[no-]banner Show DirectFB Banner on startup
[no-]surface-sentinel Enable surface sentinels at the end of chunks in video memory
force-windowed Primary surface always is a window
force-desktop Primary surface is the desktop background
[no-]hardware Enable/disable hardware acceleration
[no-]software Enable/disable software fallbacks
[no-]software-warn Show warnings when doing/dropping software operations
[no-]software-trace Show every stage of the software rendering pipeline
[no-]dma Enable DMA acceleration
[no-]sync Do `sync()' (default=no)
[no-]agp[=<mode>] Enable AGP support
[no-]thrifty-surface-buffers Free sysmem instance on xfer to video memory
font-format=<pixelformat> Set the preferred font format
[no-]font-premult Enable/disable premultiplied glyph images in ARGB format
[no-]deinit-check Enable deinit check at exit
block-all-signals Block all signals
[no-]vt-switch Allocate/switch to a new VT
vt-num=<num> Use given VT instead of current/new one
[no-]vt-switching Allow Ctrl+Alt+<F?> (EXPERIMENTAL)
[no-]graphics-vt Put terminal into graphics mode
[no-]vt Use VT handling code at all?
mouse-source=<device> Mouse device for serial mouse
[no-]mouse-gpm-source Enable mouse input repeated by GPM
[no-]motion-compression Mouse motion event compression
mouse-protocol=<protocol> Mouse protocol
[no-]lefty Swap left and right mouse buttons
[no-]capslock-meta Map the CapsLock key to Meta
linux-input-ir-only Ignore all non-IR Linux Input devices
[no-]linux-input-grab Grab Linux Input devices?
[no-]cursor Never create a cursor or handle it
[no-]cursor-updates Never show a cursor, but still handle it
wm=<wm> Window manager module ('default' or 'unique')
init-layer=<id> Initialize layer with ID (following layer- options apply)
layer-size=<width>x<height> Set the pixel resolution
layer-format=<pixelformat> Set the pixel format
layer-depth=<pixeldepth> Set the pixel depth
layer-buffer-mode=(auto|triple|backvideo|backsystem|frontonly|windows)
layer-bg-none Disable background clear
layer-bg-color=AARRGGBB Use background color (hex)
layer-bg-color-index=<index> Use background color index (decimal)
layer-bg-image=<filename> Use background image
layer-bg-tile=<filename> Use tiled background image
layer-src-key=AARRGGBB Enable color keying (hex)
layer-palette-<index>=AARRGGBB Set palette entry at index (hex)
layer-rotate=<degree> Set the layer rotation for double buffer mode (0/180)
[no-]smooth-upscale Enable/disable smooth upscaling per default
[no-]smooth-downscale Enable/disable smooth downscaling per default
[no-]translucent-windows Allow translucent windows
[no-]decorations Enable window decorations (if supported by wm)
[no-]startstop Issue StartDrawing/StopDrawing to driver
[no-]autoflip-window Auto flip non-flipping windowed primary surfaces
videoram-limit=<amount> Limit amount of Video RAM in kb
agpmem-limit=<amount> Limit amount of AGP memory in kb
screenshot-dir=<directory> Dump screen content on <Print> key presses
video-phys=<hexaddress> Physical start of video memory (devmem system)
video-length=<bytes> Length of video memory (devmem system)
mmio-phys=<hexaddress> Physical start of MMIO area (devmem system)
mmio-length=<bytes> Length of MMIO area (devmem system)
accelerator=<id> Accelerator ID selecting graphics driver (devmem system)
[no-]matrox-sgram Use Matrox SGRAM features
[no-]matrox-crtc2 Experimental Matrox CRTC2 support
matrox-tv-standard=(pal|ntsc|pal-60)
Matrox TV standard (default=pal)
matrox-cable-type=(composite|scart-rgb|scart-composite)
Matrox cable type (default=composite)
h3600-device=<device> Use this device for the H3600 TS driver
mut-device=<device> Use this device for the MuTouch driver
penmount-device=<device> Use this device for the PenMount driver
linux-input-devices=<device>[[,<device>]...]
Use these devices for the Linux Input driver
tslib-devices=<device>[[,<device>]...]
Use these devices for the tslib driver
unichrome-revision=<rev> Override unichrome hardware revision
i8xx_overlay_pipe_b Redirect videolayer to pixelpipe B
Window surface swapping policy:
window-surface-policy=(auto|videohigh|videolow|systemonly|videoonly)
auto: DirectFB decides depending on hardware.
videohigh: Swapping system/video with high priority.
videolow: Swapping system/video with low priority.
systemonly: Window surface is always stored in system memory.
videoonly: Window surface is always stored in video memory.
Desktop buffer mode:
desktop-buffer-mode=(auto|triple|backvideo|backsystem|frontonly|windows)
auto: DirectFB decides depending on hardware.
triple: Triple buffering (video only).
backvideo: Front and back buffer are video only.
backsystem: Back buffer is system only.
frontonly: There is no back buffer.
windows: Special mode with window buffers directly displayed.
Force synchronization of vertical retrace:
vsync-after: Wait for the vertical retrace after flipping.
vsync-none: disable polling for vertical retrace.
libfusion options:
force-slave Always enter as a slave, waiting for the master, if not there
tmpfs=<directory> Location of shared memory file
shmfile-group=<groupname> Group that owns shared memory files
[no-]debugshm Enable shared memory allocation tracking
[no-]madv-remove Enable usage of MADV_REMOVE (default = auto)
libdirect options:
memcpy=<method> Skip memcpy() probing (help = show list)
[no-]quiet Disable text output except debug messages or direct logs
[no-]quiet=<type> Only quiet certain types (cumulative with 'quiet')
[ info | warning | error | once | unimplemented ]
[no-]debug Enable debug output
[no-]debugmem Enable memory allocation tracking
[no-]trace Enable stack trace support
log-file=<name> Write all messages to a file
log-udp=<host>:<port> Send all messages via UDP to host:port
fatal-level=<level> Abort on NONE, ASSERT (default) or ASSUME (incl. assert)
[no-]fatal-break Abort on BREAK (default)
dont-catch=<num>[[,<num>]...] Don't catch these signals
[no-]sighandler Enable signal handler
[no-]thread-block-signals Block all signals in new threads?
disable-module=<module_name> suppress loading this module
thread-priority-scale=<100th> Apply scaling factor on thread type based priorities