구차니의 잡동사니 모음

Usage...
Xming [:<display-number>] [option]
-a #                   mouse acceleration (pixels)
-ac                    disable access control restrictions
-audit int             set audit trail level
-auth file             select authorization file
-br                    create root window with black background
+bs                    enable any backing store support
-bs                    disable any backing store support
-c                     turns off key-click
c #                    key-click volume (0-100)
-cc int                default color visual class
-co file               color database file
-core                  generate core dump on fatal error
-dpi int               screen resolution in dots per inch
-deferglyphs [none|all|16] defer loading of [no|all|16-bit] glyphs
-f #                   bell base (0-100)
-fc string             cursor font
-fn string             default font name
-fp string             default font path
-help                  prints message with these options
-I                     ignore all remaining arguments
-logo                  enable logo in screen saver
nologo                 disable logo in screen saver
-nolisten string       don't listen on protocol
-noreset               don't reset after last client exists
-reset                 reset after last client exists
-p #                   screen-saver pattern duration (minutes)
-pn                    accept failure to listen on all ports
-nopn                  reject failure to listen on all ports
-r                     turns off auto-repeat
r                      turns on auto-repeat
-render [default|mono|gray|color] set render color alloc policy
-s #                   screen-saver timeout (minutes)
-sp file               security policy file
-su                    disable any save under support
-t #                   mouse threshold (pixels)
-terminate             terminate at server reset
-to #                  connection time out
-tst                   disable testing extensions
ttyxx                  server started from init on /dev/ttyxx
v                      video blanking for screen-saver
-v                     screen-saver without video blanking
-wm                    WhenMapped default backing-store
-wr                    create root window with white background
-x string              loads named extension at init time
-maxbigreqsize         set maximal bigrequest size
+extension name        Enable extension
-extension name        Disable extension
-query host-name       contact named host for XDMCP
-broadcast             broadcast for XDMCP
-indirect host-name    contact named host for indirect XDMCP
-port port-num         UDP port number to send messages to
-from local-address    specify the local address to connect from
-once                  Terminate server after one session
-class display-class   specify display class to send in manage
-cookie xdm-auth-bits  specify the magic cookie for XDMCP
-displayID display-id  manufacturer display ID for request
-kb                    disable the X Keyboard Extension
+kb                    enable the X Keyboard Extension
[+-]accessx [ timeout [ timeout_mask [ feedback [ options_mask] ] ] ]
                       enable/disable accessx key sequences
-ardelay               set XKB autorepeat delay
-arinterval            set XKB autorepeat interval

-clipboard
    Enables the integration between the Xming clipboard and
    Windows clipboard.
-clipupdates num_boxes
    Use a clipping region to constrain shadow update blits to
    the updated region when num_boxes, or more, are in the
    updated region.  Diminished effect on current Windows
    versions because they already group GDI operations together
    in a batch, which has a similar effect.
-depth bits_per_pixel
    Specify an optional bitdepth to use in fullscreen mode
    with a DirectDraw engine.
-emulate3buttons [timeout]
    Emulate a 3 button mouse with an optional timeout in
    milliseconds.  The default timeout is 50 milliseconds.
-engine engine_type_id
    Override the server's automatically selected engine type:
        1 - Shadow GDI
        2 - Shadow DirectDraw
        4 - Shadow DirectDraw4 Non-Locking
    Do not use this parameter unless instructed to do so.
-fullscreen
    Run the server in fullscreen mode with -depth and -refresh
    set as required.
-ignoreinput
    Ignore keyboard and mouse input.  This is usually only used for
    testing and debugging purposes.
-internalwm
    EXPERIMENTAL: Run the internal window manager.
-[no]keyhook
    Grab special windows key combinations like Alt-Tab or the Menu
    key.  These keys are discarded by default.
-lesspointer
    Hide the windows mouse pointer when it is over an inactive
    Xming window.  This prevents ghost cursors appearing where
    the Windows cursor is drawn over the X cursor.
-logfile filename
    Write logmessages to <filename> instead of Xming.n.log,
    where n is the display-number of the X Server.
-logverbose verbosity
    Set the verbosity of logmessages. [NOTE: Only a few messages
    respect the settings, so not much use yet]
        0 - only print fatal error.
        1 - print additional configuration information.
        2 - print additional runtime information [default].
        3 - print debugging and tracing information.
-[no]multimonitors (or -[no]multiplemonitors)
    Use the entire virtual screen if multiple monitors are
    present.
-multiwindow
    Run the server in multiwindow mode.  Not to be used
    together with -rootless or -fullscreen.
-mwextwm
    EXPERIMENTAL: Run the server in multiwindow external
    window manager mode. Use with xwinwm.
-nodecoration
    Do not draw a window border, title bar, etc.  Windowed
    mode only i.e. ignored when -fullscreen specified.
-noicons
    Disable the conversion of X icons in multiwindow mode.
    Use to prevent an infrequent crash in miGetImage().
    This is a work-around that most people won't need.
-nounicodeclipboard
    Disable Unicode in the clipboard.
-refresh rate_in_Hz
    Specify an optional refresh rate to use in fullscreen mode
    with a DirectDraw engine.
-rootless
    Use a transparent root window with an external window
    manager (such as openbox).  Not to be used with
    -multiwindow or with -fullscreen.
-screen scr_num [width height [x y] | [[WxH[+X+Y]][@m]] ]
    Enable screen scr_num and optionally specify a width and
    height and initial position for that screen. Additionally
    a monitor number can be specified to start the server on,
    at which point, all coordinates become relative to that
    monitor. Examples:
    -screen 0 800x600+100+100@2 ;2nd monitor offset 100,100 size 800x600
    -screen 0 1024x768@3        ;3rd monitor size 1024x768
    -screen 0 @1 ;on 1st monitor using its full resolution (the default)
-scrollbars
    In windowed mode, allow screens bigger than the Windows desktop.
    Moreover, if the window has decorations, one can now resize
    it.  Do not use in conjunction with -multiwindow or with -rootless.
-silent-dup-error
    If another instance of Xming is found running, exit silently
    and don't display the error message.
-swcursor
    Disable the usage of the windows cursor and use the X11 software
    cursor instead.
-[no]trayicon
    Do not create a tray icon.  Default is to create one
    icon per screen.  You can globally disable tray icons with
    -notrayicon, then enable it for specific screens with
    -trayicon for those screens.
-[no]unixkill
    Ctrl-Alt-Backspace exits the X Server. The Ctrl-Alt-Backspace
    key combo is disabled by default.
-version
    Write version and help text to the console (unless built
    console-less) and to the log file.
-[no]winkill
    Alt-F4 exits the X Server.  The Alt-F4 key combo is enabled
    by default.
-xkblayout XKBLayout
    Set the layout to use for XKB.  This defaults to a layout
    matching your current layout from windows or us (i.e. USA)
    if no matching layout was found.
    For example: -xkblayout de
-xkbmodel XKBModel
    Set the model to use for XKB.  This defaults to pc105.
-xkboptions XKBOptions
    Set the options to use for XKB.  This defaults to not set.
-xkbrules XKBRules
    Set the rules to use for XKB.  This defaults to xorg.
-xkbvariant XKBVariant
    Set the variant to use for XKB.  This defaults to not set.
    For example: -xkbvariant nodeadkeys

unsigned int scale_num, scale_denom
    Scale the image by the fraction scale_num/scale_denom.  Default is
    1/1, or no scaling.  Currently, the only supported scaling ratios
    are 1/1, 1/2, 1/4, and 1/8.  (The library design allows for arbitrary
    scaling ratios but this is not likely to be implemented any time soon.)
    Smaller scaling ratios permit significantly faster decoding since
    fewer pixels need be processed and a simpler IDCT method can be used.   

6. while (scan lines remain to be read)
    jpeg_read_scanlines(...);

Now you can read the decompressed image data by calling jpeg_read_scanlines()
one or more times.  At each call, you pass in the maximum number of scanlines
to be read (ie, the height of your working buffer); jpeg_read_scanlines()
will return up to that many lines.  The return value is the number of lines
actually read.  The format of the returned data is discussed under "Data
formats", above.  Don't forget that grayscale and color JPEGs will return
different data formats!

Image data is returned in top-to-bottom scanline order.  If you must write
out the image in bottom-to-top order, you can use the JPEG library's virtual
array mechanism to invert the data efficiently.  Examples of this can be
found in the sample application djpeg.

The library maintains a count of the number of scanlines returned so far
in the output_scanline field of the JPEG object.  Usually you can just use
this variable as the loop counter, so that the loop test looks like
"while (cinfo.output_scanline < cinfo.output_height)".  (Note that the test
should NOT be against image_height, unless you never use scaling.  The
image_height field is the height of the original unscaled image.)
The return value always equals the change in the value of output_scanline.

If you don't use a suspending data source, it is safe to assume that
jpeg_read_scanlines() reads at least one scanline per call, until the
bottom of the image has been reached.

If you use a buffer larger than one scanline, it is NOT safe to assume that
jpeg_read_scanlines() fills it.  (The current implementation returns only a
few scanlines per call, no matter how large a buffer you pass.)  So you must
always provide a loop that calls jpeg_read_scanlines() repeatedly until the
whole image has been read.

Data formats
------------

Before diving into procedural details, it is helpful to understand the
image data format that the JPEG library expects or returns.

The standard input image format is a rectangular array of pixels, with each
pixel having the same number of "component" or "sample" values (color
channels).  You must specify how many components there are and the colorspace
interpretation of the components.  Most applications will use RGB data
(three components per pixel) or grayscale data (one component per pixel).
PLEASE NOTE THAT RGB DATA IS THREE SAMPLES PER PIXEL, GRAYSCALE ONLY ONE.
A remarkable number of people manage to miss this, only to find that their
programs don't work with grayscale JPEG files.

There is no provision for colormapped input.  JPEG files are always full-color
or full grayscale (or sometimes another colorspace such as CMYK).  You can
feed in a colormapped image by expanding it to full-color format.  However
JPEG often doesn't work very well with source data that has been colormapped,
because of dithering noise.  This is discussed in more detail in the JPEG FAQ
and the other references mentioned in the README file.

Pixels are stored by scanlines, with each scanline running from left to
right.  The component values for each pixel are adjacent in the row; for
example, R,G,B,R,G,B,R,G,B,... for 24-bit RGB color.  Each scanline is an
array of data type JSAMPLE --- which is typically "unsigned char", unless
you've changed jmorecfg.h.  (You can also change the RGB pixel layout, say
to B,G,R order, by modifying jmorecfg.h.  But see the restrictions listed in
that file before doing so.)