DISPLAY(Executable format)

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    DDDD      III       SSSS    PPPP     LL           AAAA     YY      YY

    DDDDD     III     SSSSSS    PPPPPP   LL         AAAAAAAA    YY    YY

    DD  DD    III    SSS        PP  PP   LL         AA    AA     YY  YY

    DD   DD   III    SSSSS      PPPPPP   LL         AA    AA      YYYY

    DD   DD   III      SSSSS    PPPP     LL         AAAAAAAA       YY

    DD  DD    III        SSS    PP       LL         AA    AA       YY

    DDDDD     III    SSSSSS     PP       LL         AA    AA       YY

    DDDD      III    SSSS       PP       LLLLLLLL   AA    AA       YY

                              Program written by

                 Jih-Shin Ho (u7711501@bicmos.ee.nctu.edu.tw)

                             Document written by

                 Jih-Shin Ho (u7711501@bicmos.ee.nctu.edu.tw)

                 Oliver Weyand (chbrin3@nyx.uni-konstanz.de)

                                Maerz Bernhard                 

                             Document modified by

                    Ben Jos Walbeehm (abruzzis@cas.usf.edu)

         Copyright (C) 1993-1995 by Jih-Shin Ho. All rights reserved.

   !!!  Permission to use and distribute DISPLAY(Executable format)     !!!

   !!!  for any purpose and without fee is hereby granted, provied      !!!

   !!!  that you don't make profit from DISPLAY directly. That is, you  !!!

   !!!  can use DISPLAY to create things you like and sell them, but    !!!

   !!!                                                                  !!!

   !!!                   you CAN'T sell DISPLAY.                        !!!

   !!!                                                                  !!!

   !!!  For BBS and software distribution sites, some handling charge   !!!

   !!!  is allowed.                                                     !!!

   !!! This software is provided "as is" without express or implied     !!!

   !!! warranty. The author is not responsible for any damage caused by !!!

   !!! this program.                                                    !!!

Table of Contents:


     (1)  Introduction

     (2)  General Notes

     (3)  Supported Formats

     (4)  Command Line Switches

     (5)  Function Keys

     (6)  Mouse Buttons

     (7)  Screen saver

     (8)  Preview

     (9)  Initialization steps

     (10) Menu

     (11) Special Effects

     (12) Tech. information

     (13) About the author

     (14) Final

(1) Introduction


  This program lets you READ, WRITE and DISPLAY images/movies with different

    formats. It lets you do some special effects (rotation, dithering, ...)

    on images as well.


    Includes simple file management system.

    Supports 'slide show', 'batch conversion', 'contact sheet making',

             'image preview'.

    There is NO LIMIT on image size.

    This program supports 8, 15, 16, 24 bits display.

    Supports movie files (DL, FLI/FLC, RAW, MPEG, AVI, GL, IFF/ANIM).

    Supports FLC making.

    Tiny screen saver.

    CD player (including Volume control for Sound Blaster).

    Supports sound for AVI; MPEG, FLI/FLC, DL, RAW with WAV file.

    Simple WAV player.

    Supports mouse.

  This Program is MEMORY-GREEDY. If you do not have enough memory, its

  performance is poor.

  The official site is NCTUCCCA.edu.tw:/PC/graphics/disp.

  The IP address is or

  The beta test version of next release is in the beta directory.

  I often upload DISPLAY to SimTel. So if NCTUCCCA is too slow, you can try:


  Filenames are : disp???a.zip, disp???b.zip. ??? is version number.

(2) General Notes


  Line begins with '+' is newly added/modified after last version.

  Resources/parameters are in config file, config.dis. This file is read when

  DISPLAY starts up.

  You can use text editor to edit config.dis.

  If you encounter something unknown, please read display.faq and config.dis.

(3) Supported Formats


  Read: GIF(.gif)*, Japan MAG(.mag), Japan PIC(.jpc), Sun Raster(.ras),

        Jpeg in Jfif(.jpg)*, XBM(.xbm), Utah RLE(.rle), PBM(.pbm), PGM(.pgm),

        PPM(.ppm), PM(.pm), PCX(.pcx), Japan MKI(.mki), Tiff(.tif),

        Targa(.tga), XPM(.xpm), Mac Paint(.mac), GEM/IMG(.img),

        IFF/ILBM/PBM(.iff,.lbm), Windows BMP(.bmp), QRT ray tracing(.qrt),

        Mac PICT(.pct), VIS(.vis), PDS(.pds), VIKING(.vik), VICAR(.vic),

        FITS(.fit), Usenix FACE(.fac), IRIS/SGI(.sgi), YUV(.yuv), RAW RGB(.rgb),

        PCPAINT/Pictor(.pic,.clp), RAW GREY(.gry), Photo-CD(.pcd),

        VORT output(.pix), WordPerfect Graphics(.wpg), Windows ICON(.ico),

        ANSI screen file(.ans), Image INDEX(.idx), VIVID output(.img,.viv),

        Thumbnail(.tnl), Dr. Halo(.cut), Japan PI(.pi), PNG(.png)*.

        DL(.dl), FLI(.fli), FLC(.flc), RAW(.raw, produced by DMPEG),

        MPEG(.mpg), AVI(.avi), GL(.gl), IFF/ANIM(.anm).

+       RIFF/WAVE(.wav), Sun au(.au).

        the extensions in () are standard extensions.

  Write: GIF*, Sun Raster, Jpeg*, XBM, PBM, PGM, PPM, PM, Tiff, Targa,

         XPM, Mac Paint, Ascii, Laser Jet, IFF/ILBM, Windows BMP,


         Postscript, RAW GREY, Wordperfect Graphics, Windows ICON,

         Image INDEX(.idx), ANSI screen file, Thumbnail, Dr. Halo, PNG*.

  Preview: GIF, Jpeg, Windows BMP, PBM, PGM, PPM, Targa, PCX, Mac Paint,

           Photo-CD, PNG, XBM, Sun Raster, Thumbnail, GEM/IMG, Windows ICON,


  '*' means 'support image comment'.

  All Read/Write formats support full color(8 bits), grey scale, b/w dither,

  and 24 bits image, if allowed for that format.

(4) Command Line Switches


  DISPLAY understands several command-line parameters. Some of them are

  useful for setting up your preferred configuration or overwriting

  config.dis options. Others are for command-line processing.

  Symbol :

    aaa | bbb : You can use aaa or bbb. They are equivalent.

    [ aaa ]   : aaa is optional.

    < aaa >   : Use other value or string to replace aaa.

  (a) For normal use :

    display [-d|--display <initial_display_type>] [-s|--sort <sort_method>]

            [-f <config_file>] [-c <config_file] [-a] [-n l|g] [--help|-?]

            [--target|-t <working_directory>] [--mask|-m 'filename_mask']

            [--report|-r <report_file>]

    initial_display_type: 8 (SVGA, default), 15, 16 (HiColor), 24 (TrueColor)

    sort_method: 'name', 'ext'.

    -f: Read user specified config file only.

    -c: Read Local, Global and user specified config file.    

    -a: Always set to highest display type

    -n: Do not read Local or Global config file.

        Global: where DISPLAY.EXE resides. Local: where you start DISPLAY.

    -t: change to the specified directory when DISPLAY starts up.

    filename_mask: separated by ';'. quotation marks are needed before and after

+     filename_mask. Mask length should be less than 128.

    report_file: Contains useful information generated by DISPLAY. 

                 Please don't use relative path(e.g.: ../qqq/report).             

  (b) For command-line single image/movie viewing :

    display [--width|-w <image_width>] [--height|-h <image_height>] 

+           [--noask|-k] [--stay] [--type <standard extension>]


    -w & -h: for image format without information header(YUV,RGB,GREY).

    -k: Don't ask any question, start movie playing immediately.

+   --stay: Don't exit DISPLAY after viewing.

+   --type: Specify the input image type.

  (c) For command-line batch conversion :

    display --batch | -b <output_format> [--bw|--grey|--color|--true|--same]

            [--stay] [--dialog | -g] [--report|-r <report_file>]

            input_file | input_file output_directory | input_file output_file |

            input_files output_directory

    output_format: Standard extensions. Like gif, bmp ... (see section (6))

    bw,grey,color,true: B/W dither, Grey scale, 8bit full color, 24bit

      true color.

    same: The same color format as input image. If input is 24-bit image, 

          output is saved as true color image (if possible). Otherwise output

          is saved as 8bit full color image.

    The default color type for batch conversion is 8bit full color.

    -g: DISPLAY will let you change the setting of output_format if there

        is any.

+   --stay: Don't exit DISPLAY after viewing. 

  (d) For command-line slide show :

    display [--slide|-l] [--noask|-k] [--report|-r <report_file>]

            [--stay] image_files | @response_file

    -l: Tell DISPLAY you want slide show (even for single file).

    -k: Don't ask any question, start slide show immediately.

    response_file: please refer to display.faq.

+   --stay: Don't exit DISPLAY after viewing. 

  (e) For command-line contact sheet generation :

    display --sheet|-e <batch_contact_sheet_script> [--report|-r <report_file>]

    for the batch_contact_sheet_script format, read display.faq.

  (f) For command-line movies (more than 1) playing :

    display --movie|-v [--noask|-k] [--preload|-p 0|1] 

            [--report|-r <report_file>] movie_files


    -k: Don't ask any question, start movie playing immediately.

    -p: Preload or not.

+ (g) For command-line UU/MIME Decode :

+   display --uud|--mmd files

    Wild-card filenames are sorted by name in ascend order.

    Notes: Files are written to current directory.

+ (h) For command-line UU/MIME Encode :

+   display --uue|--mme [--line <line_number>] files

    --line: Number of lines to be written to one file. Default is 950.

            0 means 'don't split file'.

    Notes: Files are written to current directory.

  Please read display.faq for the information not mentioned here.

(5) Function Keys


    Escape : Abort function and return.

    RETURN : Select.

    ALT-X  : Quit program anywhere without prompting.

  (a) In menu selection :

    ESCAPE,F10 : Quit program (prompted).

    F1         : Show DISPLAY.DOC.

    CTRL-F1    : Show user-defined help file. (read config.dis)

    F4         : Change parameters.

+                If already in parameter-changing screen, pop up sub-menu.

    ALT-Z      : Shell to DOS.

    F9         : For those who cannot remember all commands in DISPLAY.

    t,T   : Tag file. (Untag tagged files)

    +     : Tag a group of files. (See match.doc)

    ALT-T : Tag all files.

    u,U   : Untag file.

    -     : Untag a group of files. (See match.doc)

    ALT-U : Untag all files.

    *     : Reverse tag.

    .     : Tag all files after (and under) select bar.

    ,     : Tag all files before (and under) select bar.

    >     : Untag all files after (and under) select bar.

    <     : Untag all files before (and under) select bar.

    CTRL-A -- CTRL-Z : Change disk drive directly.

    F2     : Change disk drive.

    CTRL-F2: Go to user-specified disk and directory.

    F3     : Change filename masks. (Separated by ';') (See match.doc)

    CTRL-F3: Change exclude masks. Don't show files which match these masks.

    F7     : Make Directory.

    F6,m,M : Move file(s).

    ALT-M  : Move single(current) file (ignore tags).

    F8,d,D : Delete file(s).

    ALT-D  : Delete single(current) file (ignore tags).

    r,R    : Rename file.

    c,C    : Copy File(s).

    ALT-C  : Copy single(current) file (ignore tags).

    ALT-A  : Re-read directory. Keep current description entries.

    ALT-B  : Re-read directory. Discard current desciption entries.

    ALT-S  : Save config file.

    BACKSPACE : Go up one level in the directory tree.

    F5  : Some effects on pictures, e.g. flip, rotate ...

    z,Z : Display first 10 bytes of file in Ascii, Hex and Dec modes.

    f,F : Display disk/memory free space.

    s,S : Slide Show (shows tagged files). ESCAPE to terminate.

    b,B : Batch conversion (converts tagged files to a single format).

          You can perform up to 8 special operations.

          Each is independent of the others.

    e,E : Contact sheet making.

    q,Q : Accumulation color quantization.

          Finds the best palette set for a group of files.

          Very useful for producing animation pictures. (read display.faq)

    l,L : List available graphic/text modes.

    o,O : Display font.

    v,V : View text file.

    x,X : View binary file.

    a,A : View ANSI screen file(s).

          If you view tagged files, use F10 to interrupt.

    n,N   : Show image comment.

    ALT-N : Write image comment to file.

+   ALT-P : Print image file.

    ALT-E : Edit description entry. (see display.faq)

    ALT-W : Write description and/or image dimension to description file. 

            (see display.faq) Note: You must set resource 'wrtie_desc_dim'

            to 1 to enable the dimension writing.

    ALT-F : Load description and/or image dimension from DEFAULT description

            file. (see display.faq) Note: If 'use_perm_desc' is active, load

            desc. and/or dim. from permanent desc. file.

    ALT-G : Load description and/or image dimension from CURRENT description

            file. (see display.faq) Note: The same note as above.

    g,G   : Set CURRENT description file to the file under select bar and

            load it. If 'use_perm_desc' is active, change perm_description_file

            to this file.

    Ins   : Change display type (8, 15, 16, 24 bits).

    Del   : Change display resolution.

+   TAB   : In mode selection screen : Change process target. (read display.faq)

+           In file selection screen : Change view window (for double view).

+   i,I   : Show previously loaded image.

    w,W   : Write previously loaded image.

    p,P   : Toggle preview.

+   =     : Toggle double view.

    ALT_H : Toggle between 'graphic text' and 'normal text' modes.

    Page Up/Down : Move one page.

    Left/Right arrow : Change display type In 'screen' & 'effects' menu.

    0..9 :

    SHIFT-A..Z : Jump to first file whose name starts with this character.

    ALT-F5 .. ALT-f8 : User commands.

  (b) In graphics mode :

    RETURN : return to text mode. If 'return_to_next' is true and current

             image is still image, show next still image. 

             In this mode, movies and other non-still images are ignored.

    BACKSPACE : If 'return_to_next' is true and current image is still

                image, show previous still image.

    SPACE,ESCAPE : return to the text mode.

    + : Go to next resolution.

    - : Go to previous resolution.

    Arrow keys, Home, End, Page Up, Page Down : Scroll image.

      Home: Left-most.

      End: Right-most.

      Page Up: Top of image.

      Page Down: Bottom of image.

    CTRL-Arrow keys: Crop image by one line.

    CTRL-SHIFT-Arrow keys: Big Crop (Controlled by resource 'big_crop_step').

    F1 .. F8 : Gamma correction.

      F1,F3,F5,F7: decrease Red,Green,Blue,All.

      F2,F4,F6,F8: increase Red,Green,Blue,All.

    F9,F10 : Zoom Out/In.

    ALT-Z : Pop out graphic menu. SPACE to close.

    ALT-E : Edit description entry.

    ALT-B : Toggle between normal mouse mode and mouse ball mode.

            (see display.faq)  

+   ALT-T : Tag current image file. Useful if 'return_to_next' is 1.

+   ALT-U : Untag current image file. Useful if 'return_to_next' is 1.

  (c) In text viewer :

    F2         : Search string (case-sensitive).

    F3         : Search string (case-insensitive).

    F6         : Search again.

    CTRL-LEFT  : Scroll right 10 chars.

    CTRL-RIGHT : Scroll left 10 chars.

    CTRL-PGUP  : Goto top of file.

    CTRL-PGDN  : Foto bottom of file.

  (d) In contact sheet preview & Postscript preview :

    '+' : Increase scaling factor.

    '-' : Decrease scaling factor.

    Ins,Del : Fine tune(Inc/Dec) scaling factor.

  (e) In slide show :

     If the delay time is 0, DISPLAY waits until you hit any key.

       (except ESCAPE).

     'w' or 'W' : pause, any key to continue.

     Up-Arrow   : Go back one image.

     BACKSPACE  : Go back one image. Works for scroll & non-scroll mode.

     ALT-D      : Mark current image as deletable. '-D-' is displayed at the

                  left-up screen corner.

     ALT-C      : Mark current image as copiable. '-C-' is displayed.

     ALT-M      : Mark current image as movable. '-M-' is displayed.

     ALT-T      : Mark image as tagged, that is, tag image after slide show.

                  '-T-' is displayed. You must set 'keep tag after slide show'

                  to 0, first.

     ALT-N      : Mark image as untagged, that is, untag image after slide

                  show. '-N-' is displayed. You must set 'keep tag after

                  slide show' to 1, first.

     ALT-U      : Unmark current image.


       Reverse slide show is slower.

       You must set 'delay time = 0' and 'not scroll' to use Up-Arrow and


       Before leaving slide show, if there are marked images, DISPLAY will 

         show you another menu for the delete/copy/move operations.

  (f) In movie:

     SPACE  : pause playing. If you press 'w' or 'W' at this time, DISPLAY

       writes current frame to file. After writing, playback pauses at next


     ESCAPE : Terminate playing.

     '+'    : Increase sound volume.

     '-'    : Decrease sound volume.

     Ins    : Increase master volume.

     Del    : Decrease master volume.


   (g) In ANSI viewer:

     ALT_B : Toggle between normal mouse mode and mouse ball mode.

             (see display.faq)  

   (h) In image INDEX viewer:

     TAB : Change focus to next image.

+    SHIFT-TAB, BACKSPACE : Change focus to previous image.

     SPACE, RETURN : View this image.

     ESCAPE : Terminate.

   (i) In CD player:

     1 .. 9 : Select track directly.

     +   : Increase CD volume. (Sound Blaster)

     -   : Decrease CD volume. (Sound Blaster)

     Ins : Increase master volume. (Sound Blaster)

     Del : Decrease master volume. (Sound Blaster)

   (j) In sound player:

     SPACE  : Pause/continue.

     +      : Increase Wave volume.

     -      : Decrease Wave volume.

     Ins    : Increase master volume.

     Del    : Decrease master volume.

     ESCAPE : Stop.

(6) Mouse Buttons


    MIDDLE button and CTRL-RIGHT button always mean ESCAPE.

   (a) in read/write menu:

     single-click LEFT or RIGHT button = 'move select bar'.

     double-click LEFT button  = RETURN.

     double-click RIGHT button = SPACE.

     CTRL-LEFT button = Tag.

   (b) in other text menus:

     RIGHT button means SPACE.

     single-click LEFT button = 'move select bar'.

     double-click LEFT button = RETURN.

   (c) in contact sheet preview:

     RIGHT = show/hide mouse cursor.

     LEFT  = move an image piece if the mouse cursor is shown,

             else leave graphics mode.

     CTRL-LEFT = move contact sheet.

   (d) in image display screen:

     RIGHT = show/hide mouse cursor.

     LEFT  = move the image around the screen if the mouse cursor is shown,

             else leave graphics mode.

     CTRL-LEFT  = move one page.

     SHIFT-LEFT = Pop out graphic menu.

       You can move this box around screen by click and drag.

     ALT-LEFT = define rectangle for cropping.

       Releasing left button will crop image if ALT key is still pressed,

       else do nothing.

     CTRL-ALT-LEFT = toggle showing image coordinates.

       While showing image coordinates, press ALT-LEFT to define cropping


   (e) in mode selection screen:

     Click LEFT button at:

       'Imag8' or 'Imag24' : change processing target.

       '000 x 000 x 000' or '000 x 000' : change display type.

       '<--' or '|||' : change linking status. (controlled by resource


   (f) in text/ansi-screen viewer:

     RIGHT button : Same as SPACE.

     Click LEFT button at:

       Top of screen       : Scroll down one page.

       Bottom of screen    : Scroll up one page.

       Left end of screen  : Scroll right.

       right end of screen : Scroll left.

       Upper half of screen: Scroll down.

       Lower half of screen: Scroll up.

   (g) in image INDEX viewer:

     LEFT button  : Same as (d)

     RIGHT button : View this image. 

+  (h) in slide show:

+    Works only in non-scroll mode.

+    LEFT button  : equivalent to RETURN.

+    RIGHT button : equivalent to BACKSPACE.

   In some text regions the mouse cursor will change. Press the LEFT button

   to accomplish that.

(7) Screen saver


   Use resource 'screen_save_time' in config.dis to control the idle time

   to active screen saver. You can also move mouse cursor to the following

   places to control screen saver:


     Upper-Left corner : Never sleep.

     Low-Right corner  : Sleep now.

(8) Preview


   Preview lets you see the small image of this picture before loading it.

   You can use key 'p' to turn on/off preview (DISPLAY will switch to

   graphic text mode if necessary). Currently DISPLAY support 2 strategies

   for preview, i.e. loading preview from .TNL file and original image.

   The first method is faster, but you need to make .TNL file first. You can

   also use PKZIP or ZIP to archive .TNL images together to reduce the disk

   space occupation. This .ZIP file is called 'packfile'.

   The procedures of loading preview are described below:

   (use_tnl_preview, global_tnl_path, global_tnl_packfile & local_tnl_packfile

    are resources in config.dis)


      If 'use_tnl_preview' is false(i.e. 0), goto step 3.

      Load preview from .TNL file within current directory. Filename is the

      same as current image filename, except that extension is changed to .TNL.                                                            

      If success, return.

      If 'local_tnl_packfile' is specified, try to load the corresponding .TNL

      image from this file within current directory.

      If success, return.      


      If 'global_tnl_path' is not specified, goto step 3.

      Load preview from .TNL file within 'global_tnl_path'. Filename is the

      same as current image filename, except that extension is changed to .TNL.

      If success, return.     

      If 'global_tnl_packfile' is specified, try to load the corresponding .TNL

      image from this file within 'global_tnl_path'. 

      If success, return.


      Don't use .TNL file. Load preview from current image.


(9) Initialization steps


  The followings are what happen when you start DISPLAY. There's nothing

  you have to do, but it helps to avoid errors. The important thing is,

  that a command-line option overrides the configuration file option.

    1. Find allowed screen resolutions (for .grn video drivers only).

    2. Read the configuration files (Global first, then Local).

       Global: where DISPLAY.EXE resides. Local: where you start DISPLAY.

       If you use '-f' command-line option, Global and Local config files

       are ignored. The specified file is used.

    3. Process the command-line options (if any). So command-line options

       override the configuration file.

    4. Now, RUN.

(10) Menu


                               GENERAL RULES

This section will describe the menus and options you can choose from. You can

read through it or just start the program and play around. When you have

a problem you can come back and read the section you need.

Most things are self-explanatory. Look for the comments behind a possible

command. Also keep an eye at the first and last row of the screen: DISPLAY

will tell you in most cases what is going on.

There are several fields with a special meaning (i.e. [ Auto Read ]). You

can activate them by moving the cursor inside the marks and then click the

left mouse button.

In any MENU you can call a pull-down-menu by pressing the F9 key or moving

the cursor to the top-line and click a button.

The different functions can also be selected by using a hot-key.

Sometimes DISPLAY will ask you questions. You can answer them with a mouse

click or by pressing the first (capital) letter of the answers

(i.e. Y or y for yes).

Allowed operations are shown in white the others in grey (if you use the

default colors).


                              THE READ-MENU


After starting DISPLAY, you will find yourself in the read-menu. You will see

a file list of the directory you started DISPLAY from (or the directory you

have specified with the -t command line option). Which file information you

see, depends on your selection in the config.dis file. You can choose from

different informations (including 4DOS description files).

There are some marked fields you can use with the mouse. In the pull down

menu-bar you will find 8 headers with a different number of options. Because

most operations are accessible with short-cuts, that's the easiest way to call

them. For some operations (i.e. slide show) you have to tag at least one file.

For Reading a file (image, movie) simply select one and press RETURN or double

click with the left mouse button. Display will autodetect the correct format

by itself. If you have problems try using the SPACE bar or double click with

the right mouse button for selecting a format manually.

When image dimension is shown, '*' means that this image is 24-bit. percentage

means the compression ratio (file size/image size). Where image size is

image_width * image_height * pixel_size(1 or 3).

There is a status line at the bottom of screen. 'gamma' means gamma

correction is used. 'desc' means file descriptions are changed. 'Hi' means

using HiColor mode for preview.


   Here you find some informations about display and it author. You can choose

   the complete help (this file) and a short overview of key assignments.

   Calling help will load the DISPLAY.DOC file. It contains help about possible

   actions and a list of all short-cuts. There is also a description of the

   meaning of the mouse buttons (be sure to check them out, because they

   change, depending on the menu you use).

   The second file is user defined, so you can write whatever you want. The

   actual file brief.doc is just an example.


   You have several options to manipulate files. You can delete, move, copy,

   rename and view files. The options for shelling to DOS and quiting the

   program are also located under this header. You can perform the actions on

   a single file, a group of files (that is, tagged files), or the file

   currently under the marker.

3. DIR

   From inside DISPLAY you can make directories. Another point is rereading

   the current directory, for updating changes you have written to disk.


   That's the menu with the real highlights of DISPLAY. Here you can choose

   from the options: slide show, batch conversion, contact sheet, accumulate

   quantization, and the special effects. Further you can display the fonts

   comming with DISPLAY, show and write a already loaded image, and unpack

   gl-files. You can also create a .flc movie. For some operations, you must

   tag files first.


   Under this header you will find options to select the image type and

   graphic resolution (for a list of possible modes for your graphic card

   take a look at the status menu or type L). Other options are for changing

   the working-drive and for editing the file mask (see match.doc).

6. TAG

   Believe it or not this one is for tag and untag files (single, group, all).

   I think that's all you must know.


   This menu point is for changing the defaults. Open the submenu and you

   will see a number of fields, where you can change most parameters that

   DISPLAY uses. You can activate them just for one run or make them the

   default by saving a new config.dis. You can work with different configur

   -ations, when you use different local config.dis files (i.e. make

   directories for the users of your system, if there is more then one).

   If you don't understand the meanings of parameters, please read config.dis.


   Here you can get informations about your graphic card, RAM, disk space,

   and the formats of your image files.


                                THE WRITE-MENU


When you choose an option that will write changes to your disk, you will

sometimes enter the write-menu (i.e. moving files). In the write menu you

will find other marked fields for use with mouse. Although you will see the

same headers in the pop-up-menu, most of the options are disabled. Also the

most short-cuts won't help you. I think you will use this menu without

problems, because it is very self-explanatory.


                               THE SCREEN-MENU


Once you have loaded a picture, you will see the screen-menu (if you don't

set the 'auto_display_image' to 1). It has a different look and pop-up-menu

structure. If the loaded file is a movie, you will find yourself in another

menu, which is optimized for the additional needed options you need to

display movies.

The marked fields in the screen-menu are for viewing an image in the selected

resolution or writing it to file. Further you can go back to the read-menu or

exit the program. On the left you see three bigger fields. They are for those

of you, who are using a mouse and don't want to use the keyboard for pressing

the return, space, or esc keys.

The graphic modes you can choose from (to show the image) are in white, the

others are grey.

Pressing F9 again will bring up the headers of the pop-up-menu. These have

changed a little, compared to the read/write menu


   Same as in read/write menu.


   Only the exit option is still there, for the other things you have to go

   back to the read/write menu.


   Three options are now in the submenu. You can choose between special

   effects, display fonts, and change processing target. The last option

   means to change between palette images (most 8-bit images are of that

   type) and RGB-pictures (truecolor, highcolor).


   Same as in read/write menu except for the preview option.


   The possible graphic and text mode are shown here (depends on your

   hardware and the driver you use).


   What you find in this submenu are some often used operations from the

   special effects menu (look there for a description of the comands).

   Another way to manipulate your image is the pop-up menu in graphics

   mode. There you can perform some effects without leaving the picture.

(11) Special Effects





When you start manipulating your pictures you will at some point look in the

special-effects-menu. The different effects are sorted in 6 groups. As

mentioned above you can rotate, flip, resize, mix, and convert images.

Most often other programs offer only some of the operations DISPLAY is able

to perform. Some other effects DISPLAY performs are otherwise found in

professional and expensive graphic packages only!

In this chapter you will find the complete list of possible effects with some

short comments. The numbers are the same as in DISPLAY. If you want to make

some of these effects the defaults for batch conversion please find the

[Batch_Convert] section in config.dis and read the comment.

At the end of this section are some more detailed explanations of selected

special effects (marked with an '*'), don't miss them !!

Number          Operation                       Comment (if necessary)

(01)-(01)       Flip Horizontal                 -

(01)-(02)       Flip Vertical                   -

(01)-(03)       Rotate Clockwise (90)           -

(01)-(04)       Rotate Counter-clockwise (90)   -

(01)-(05) *     Rotate/Shear image(any angle)   lets you rotate the image any

                (->24)                          angle you want. If you don't

                                                know what shearing means just

                                                do it. It's easier to look

                                                than to explain.

(02)-(01) *     Resize image ( ->24 )           the resizing operation will

                                                promote the image to 24-bit

                                                if you smooth it. In the

                                                upcoming screen are some more

                                                options: You can change the

                                                size by pixel, by %, or

                                                resize different images to

                                                the same size (batch conver-


(02)-(02)       Auto Crop                       cuts off "unused" pixel. Better

                                                use the online crobbing in

                                                graphic mode (Crtl-cursor).

                                                Useful for batch conversion

(02)-(03) *     Mix/Concat two images(->24)     overlay or put together two

                                                images with different options

(02)-(04) *     New Dimension                   Adjust the image dimension.

                                                Adding background or cropping

                                                if necessary.

(02)-(05)       Crop image only (any position)  cuts off parts of the image

                                                you can specify the position

                                                and the offset

(02)-(06) *     Make image translation (->24)   Described later.

(03)-(01)       Convert to Grayscale            -

(03)-(02)       Do B/W Dither                   try FS (Floyd-Steinberg) first

(03)-(03)       Pseudo Color                    do you like strange effects ?

                                                Convert grey scale image to


(03)-(04) *     Color Quantization(24->8)       statistical should be first

                                                choice. It's good and fast.

(03)-(05)       Promote to 24-bits(8->24)       Will be done if needed, so you

                                                need this not often

(03)-(06)       Flatten grey image              Let the pixel value be equal

                                                to the brightness (grey value).                                                

(04)-(01)       Histogram Equalization          enhance the contrast.

(04)-(02)       Smooth/Enhance Images(->24)     -

(04)-(03)       Edge Enhancement(->24)          find the image 'edge'.

(04)-(04)       Negate Image                    -

(04)-(05)       Oil paint(->24)                 ever wanted to be a painter ?

(04)-(06)       Gamma Correction                better use F1-F8 in graphic

                                                mode. Useful for batch convert

(04)-(07)       Cheesy Embossing(->24)          convert color to height-field

(04)-(08) *     Remove unused colors(8)         -

(04)-(09)       Swap R/G/B                      make some funny images !

                                                interesting for pseudo-colored


(04)-(10) *     General convolution             Do 3x3 matrix multiplication

                                                Try to understand the given

                                                expression (it's simpler than

                                                it looks).

(05)-(01)       Discard 24-bit image(24)        -

(05)-(02)       Discard 8-bit image(24)         -

(05)-(03)       Push image into stack           -

(05)-(04)       Pop image from stack            -


(05)-(05)       Clear stack                     -

(06)-(01)       Load Palette Table              -

(06)-(02)       Save Palette Table              -

(06)-(03)       Display Palette Table           -

(06)-(04)       Push Palette Table              -

(06)-(05)       Pop Palette Table               -

Detail Explanations of Special Effects


DISPLAY can store both 8-bit and 24-bit images in memory. If 8-bit image

presents, 'Imag8' is shown in the screen mode/resolution selection scren.

Otherwise 'NULL8' is shown. For 24-bit image, 'Imag24' or 'NULL24' is shown.

If 'Imag8' or 'NULL8' is highlighted, all special effects are performed on

8-bit image, which is called processing target. Of course, error message is

shown, if there is no 8-bit image ('NULL8' is shown). In general DISPLAY can

make the best decision for you. You can also use TAB key to change the

processing target. The general rule is:

  The processing target is always the newly saved image.

If possible, DISPLAY keeps the target type. That is, after processing 8-bit

image is still 8-bit. If it is not allowed, type tranformation occurs. For

exmaple, 'Flip image' keeps the target type, while 'Quantization' converts

24-bit image to 8-bit image. The follow is the used symbols:

    -> 24  : Result is always 24-bit image(with some exceptions).

    -> 8   : Result is always 8-bit image.

  8 -> 24  : This effect works on 8-bit image only and produces 24-bit image.

  8        : This effect works on 8-bit image only. Image type is preserved.

Some effects(or called operations) are easy to understand. Just do it and

see the result. Some are difficult to understand. Here I make the detail

explanations of some effects.

(01)-(05)                       Rotate/Shear image (any angle)(->24)

  Antialias :                   The result looks more smooth.

  Background R,G,B :            Used to fill the unused area in the result.

(02)-(01)                       Resize image (->24)

  Image width, Image height :   You can use '%' to specify the percentage

                                relative to the original image dimension.

  Preserve aspect ratio :       DISPLAY keeps the original width v.s. length

                                ratio in the result.

  Smoothing :                   The result looks more smooth. If this

                                opation is off, image type is preserved.

                                Otherwise 24-bit image is produced.

  Resize method (for batch) :   This option works for batch conversion only.

    Absolute :                  Image is resized to the specified size.

    Relative :                  Image is resized to the specified percentage

                                relative to the original image.

    Bounded box :               Image is resized to the specified bound box

                                size. The result is always smaller than or

                                equal to the bound box. Use 'Preserve aspect

                                ratio' to control the aspect ratio.

    Fix width :                 If 'preserve aspect ratio', use the specified

                                image width and adjust image height so that

                                the new aspect ratio is the same as original,

                                otherwise same as 'Absolute'.

    Fix height :                Same as above but applied to height.                               

(02)-(03)                       Mix/Concat two images (->24)

                                This is the one of thw two effects that

                                works on two images.

  Fore over Background(no w.) : Very simple. If the pixel in forground image

                                is BLACK(that is, pixel value is 0), i


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