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1996-07-17
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Picture Cat - A Quick Tour
--------------------------
1. Introduction
---------------
PictureCat is a sophisticated program for the storage and
adminstration of picture collections, therefore being a perfect
add-on to Printer24. Flexible sorting and management functions will
help you to keep control even over large collections with hundreds of
files. Apart from the Amiga Standard 'IFF'-Format, PictureCat also
supports various PC-formats (OS3.0 or higher required) as well as all
formats supported by Amiga DataTypes. Using the built-in interface to
its companion program 'Printer24', you can generate even the largest
picture catalogs in no time.
1.1 Hardware Requirements
-------------------------
Picture Cat will run on any Amiga equipped with 2 megabytes of RAM and Amiga OS
2.04 or higher. Although a hard disk is not required to run the program, it is
strongly recommended for speed reasons. To use the PC graphics formats, OS 3.0 or
higher is required.
1.2. Installing on a Hard Disk
------------------------------
Insert the program disk in a disk drive. After the 'PictureCat'- disk icon
has appeared, open its main window by double clicking on it with the left mouse
button. Now open the desired directory on your hard disk, and drag the
'PictureCat'-drawer into the hard disk window. This will cause
the program to be copied onto the hard disk. Now start the tool
'Install Datatypes' by double-clicking on its icon to copy the
DataTypes for the PC-graphics formats onto the hard drive.
2. How to use PictureCat
------------------------
2.1. General Instructions
-------------------------
Fig. 1 shows an open file as displayed on your computer monitor. It
is possible to open several files at the same time, the number of
which is only limited by your computer's memory. The most important
pieces of information are displayed in the window's title bar,
beginning with the file name, followed by the number of entries, the
number of currently selected pictures and their size. This information
is especially useful files are going to be copied to a different volume
to check the free space required.
You can select a picture simply by clicking on its thumbnail image
with the left mouse button. To select several pictures, just do the
following: Move the mouse pointer over the border area between two
thumbnails, and drag a rectangle over all pictures to be selected
while holding the left mouse button pressed. Alternatively, you may
also hold the SHIFT-button pressed while clicking on the thumbnail
images to be selected.
Double-clicking on an object may have two different results:
1) Double-clicking on the image part of the picture will automatically load
the picture into a pre-defined picture viewer and display it
on your screen. Please refer to 'Viewer Preferences' for more information.
2) Double-clicking on the title bar of the picture opens a requester
containing specific information related to the current picture.
All other functions are controlled via menus.
3. The Menus
------------
3.1 The Project Menu
--------------------
The Project menu contains all functions related to catalog files.
Open File
Brings up an ASL file requester to select the desired catalog file.
Open Backup
Opens a copy of a catalog file. All modifications are only made to
the copy, not the original. To keep the copy, select 'Yes' in the
requester which is opened after closing the copy. The original file
will not be modified.
Close File
The current file and all windows related to it are closed. Note:
Alle modifications, including window size and position, are
automatically saved.
Delete File
Deletes the current file. As there is no chance of recovery, it
recommended that you use this function with great care.
Create Selection File
Creates a new catalog file based on all selected pictures in the
current file. When closing this file, the user can chose whether to
save it using a new file name, or to delete it.
Import Pictures
Allows the user to insert new pictures into the current catalog
file.
Scan Directory
Searches for picture files in the specified directory (without
subdirectories). In the 'Select Pictures'-requester you can select
which pictures to include in the catalog by clicking on the picture
name with the mouse. Drag the mouse pointer over several picture
entries with the left mouse button pressed, to select them.
Scan Directory recursively
See above, except that subdirectories are scanned as well.
Copy Pictures
All currently selected pictures (not their thumbnails) are copied
to a different volume (e.g. floppy disk). The total size is displayed
in the title bar, allowing the user to check whether there is enough
storage space left on the destination volume.
Print List
Outputs a picture list of the complete catalog. Please refer to the
'Print List' requester for more information.
Leave out Bitmaps
Because certain types of pictures (especially those with millions of
colours) may require more RAM than available in your system, PSP
allows you to temporarily store them on the hard disk, loading them
automatically when it comes to printing. This function has three
different options:
a) Always leave out bitmaps
b) Never leave out bitmaps
c) Leave out bitmaps by size.
This option allows you to enter a certain limit. Bitmaps with a
size exceeding this limit will automatically left out.
Save on Quitting
If this option is active, all preferences (e.g. window size and
position) related to the current file are saved as soon as the file is
closed. Important: If this is not active, all modifications made to
the preferences will be lost! You should therefore always have this
switch activated, unless your file is stored on a medium which cannot
be written to (such as a CD-ROM) or you explicitely do not want to
change anything.
3.3 The Thumbnails Menu
-----------------------
This menu contains all functions which are only related to certain
pictures. In most cases the functions will only modify the currently
selected images.
Delete
Deletes all currently selected Thumbnails. This does not immediately
destroy the original picture data. These are marked as "free" and
are overwritten the next time the file data are updated.
Restore
Performs an UNDO on the last Delete-action.
Sort
Pictures are sorted on the basis of several criteria defined in the
appropriate sub-menu.
Sort Direction
Select here whether to sort in ascending or descending order.
Selection Mode
Chose the required selction mode with this function:
ON -> Selects a picture.
OFF -> Deselects a picture.
SWAP -> Clicking on a picture swaps its selection status.
EXCLUSIVE -> Clicking on a picture de-selects all others.
Select all
Selects all pictures.
Select Category
All pictures in a file can be assigned to up to 20 different
categories (e.g. landscapes, vehicles, persons, etc.), which may be
separately defined for every catalog file. When this function is
activated, PictureCat will search for the first selected picture and
then select all other pictures belonging to the same category. The
user can then easily create a category-based overview using the
'Create Selection File' function.
De-select all
Assigns the status 'not selected' to all pictures.
Title Display
Allows the user to display a certain text under the thumbnail. There
are three sub-menus to chose from.
Copy
All currently selected pictures are saved to a file in the RAM-Disk.
Note: Only path names and file names are saved, not the picture data.
Cut
All currently selected pictures are copied, then deleted.
Paste
Reads a file which has been cut or copied, and inserts the
corresponding pictures into the current file. These three functions
allow for quick exchange of pictures between different catalogs.
Font
Select the font for the picture sub-title with this ASL font
requester.
Picture Info
Displays important information related to the current picture.
Category
Currently selected pictures can be assigned to certain categories.
Refer to the 'Assign Category' requester for more information.
Motive
You can enter a description of up to 100 characters for every
picture. For more information, refer to the 'Add Comment' requester.
Search for Pic
After entering the search string, alle motive texts are searched for
this string. If it is found, the corresponding picture is
automatically selected.
3.4 The Picture Viewer Menu
---------------------------
This menu contains a number of functions related to displaying pictures.
It is even possible to create a simple slide show.
Screen Mode
Here you select the screen mode the viewer should use.
Preferences
Please refer to the section on the 'Viewer Preferences' requester.
One Pic only
Displays only a single picture.
All Pics
All pictures currently selected are displayed one after another.
Clicking the left mouse button will terminate the current picture and
bring up the next. Press ESC to switch back to the main window.
Help System
The "DOCS" directory contains two text files for the online help system
of PictureCat. One is in AmigaGuide-format (displayable with
programs like 'AmigaGuide' or 'MultiView'), the other one in
ASCII-format. You can use any ASCII-compatible tool, like 'More' or
'WatchIt', to view it.
Get Help
Will open the online help text as specified under 'Select'.
Select
Here you can select the tool to be used for displaying the help
text. Simply enter its file name into the text gadget, and insert the
variable \F at the required position for the file name.
Click one of the 'File Type' radio buttons, to chose either the
AmigaGuide file (in AmigaGuide format) or the ReadMe file (in
ASCII-format).
4. The Input Windows
--------------------
4.1 Assign Category
-------------------
Purpose: Assign a picture to a user-definable catergory.
Menu: "Thumbnail/Category"
This requester contains up to 20 user-definable categories, which
any picture can be assigned to. Each catalog file can have its own
group of categories. Simply click on one of the buttons in the upper
half of the window to assign the category number to the current
picture. To change a category name, just click into the "Current"
gadget, and type in the new name. If you click on an empty category
button, this function will automatically be activated. The "Next
Picture"-button can be used to switch to the next picture in the
current catalog. If you activate the 'automatic' option in the
'Picture Switching' section, the next picture will automatically be
activated after the preceeding one has been assigned to a certain
category. Clicking on 'Show Picture' will load a user-defined picture
viewer and open a full-sized display of the current picture.
4.2 Add Comment
---------------
Purpose: Add a comment to a picture
Menu: "Thumbnail/Comment".
The user may add an individual comment to every picture in catalog,
which is especially important when using the search function. With a
comment you may assign a special description to your pictures. The
functions related to picture switching and display work as described
unter section 3.1.
4.3 Print List
--------------
Purpose: Outputs a list of pictures to your printer.
Menu: "Project/Print List".
Use this function to print a list of all currently selected picture
files, taking into consideration the current sort mode. The two
sliders on the left side allow you define the number of lines on the
page; if you are using continuous paper, you may also select the
number of lines not to be printed to skip the perforated line. When
using single sheets of paper, select a value of '0' here. If you are
going to redirect the print output to a file (e.g. because you want to
print the file on somebody elses printer), click on the drawer icon
next to the text gadget, and enter the path and filename for the
output file.
The right section of the window contains a number of gadgets which allow
for the selection of various print parameters. Since a printed line
usually is about 72 characters wide, a value of 10 CPI should be used.
This line contains the
following information:
1) Picture file name
2) Width, Height and Depth (Number of Bitplanes).
3) File Format (IFF,PCX....)
4) Category
5) File Size
4.4 Viewer Preferences
----------------------
Purpose: Display Pictures
Menu: "Viewer/Preferences"
Use this requester to select a number of flags related to the
picture viewer. It is even possible to program a small slideshow.
4.4.1 The Display Options
-------------------------
Full Screen
Converts the picture so that it will fill the whole screen.
Loop
After all pictures have been displayed, the program restarts with
picture one.
Buffer
Stores the picture in an internal buffer before displaying it. This
required for several transition effects to work.
Don't adjust size
The picture is not modified to fit the output window.
Custom Screen
Opens a custom screen to display the window. If this is not active,
the picture is shown on the main screen.
Floyd-Steinberg
Uses a FS-algorithm to display the picture. Otherwise, no dithering
is used.
4.4.2 External Viewer
---------------------
Use External
Use the screen mode coded into the picture file, or an external
viewer, allowing pictures to be displayed on third-party graphics
boards in up to 24 bit. Since a new screen has to be opened for every
picture, transition effects are not supported in this mode.
+DoubleNTSC
+DoublePAL
Many Amiga users use the newer 'MultiSync'-Type monitors which do not
support 15KHz Screen Modes. With this option, the program generates a
'Double-Scan'-mode. To make this work, the 'Internal' option in the
'External Viewer'-requester has to be active.
The slider in the lower left part of the window can be used to
determine the display duration in seconds. Note: Since the loading
process takes some time (especially, if a conversion process is
required), displaying a picture may in some cases require more time
than selected here.
The window on the right contains a number of transition effects, which
will be processed one after another. Please note, that only the active
effects are displayed.
4.5 Dither Mode Preferences
---------------------------
Purpose: Selection of a Dither Mode.
Menu: Automatically when opening a new file
This requester automatically opens when a new file is opened and
enables you to select the desired thumbnail size and the required
dither mode. It is important to remember that these values cannot be
modified at a later point of time; if this is required, it is
recommended that you use the 'copy' and 'paste' functions to copy the
required pictures into a new catalog.
The following section contains the pros and cons of the available
options.
Fixed Colours
Pros : low processing power requirements
Cons : high memory requirements, slow screen update.
Purpose: Uses a fixed palette to convert pictures for screen display.
HAM
Pros : low processing power requirements, fast screen update, low
memory requirements.
Cons : pictures lack clarity, HAM-screen required.
Purpose: Requires Amiga with AA-chipset, because older chipsets do
not support HAM in all resolutions.
Matrix 2Bit
Pros : low processing power requirements, fast screen update, low
memory requirements.
Cons : black/white only.
Matrix 4Bit
Pros : low processing power requirements, fast screen update, low
memory requirements.
Cons : low quality colour display
Purpose: This is mode of choice for Amigas which can only open
screens with up to 16 colours (A500, A2000, A3000).
Matrix 6 Bit
Pros : higher quality colour display.
Cons : higher memory requirements, slower screen updates
Purpose: This mode is the best compromise between display quality
and speed. 128-colour screen required.
Matrix 8 Bit
Pros : best colour display.
Cons : high memory requirements, slow screen update.
Purpose: Use this mode for the best colour display. Requires a
screen with 256 colours and an Amiga with at least an
68030-processor.
Floyd 2 Bit
Pros : see Matrix 2Bit
Cons: see Matrix 4Bit
Purpose: By using error distribution, the FS-dithering usually
produces a better colour display compared to the corresponding
'Matrix' method.
Floyd 4 Bit
Pros : see Matrix 4 Bit
Cons: see Matrix 4 Bit
Floyd 6 Bit
Pros : see Matrix 6 Bit
Cons: see Matrix 6 Bit
Floyd 8 Bit
Pros : see Matrix 8 Bit
Cons: see Matrix 8 Bit
Grey Scale n
Pros : fast screen update, low memory requirements.
Cons : no colour display.
Purpose: In this mode all colours are converted into grey scales.
For on-screen display, only the two 'Bayer'-matrixes are suitable
for matrix dithering.
The section in the lower part of the window contains three buttons to
determine the buffer type for the bitmap graphics:
No Buffer
The bitmaps are recalculated every time the screen is updated.
Although this requires additional time, precious CHIP-Ram is saved.
Buffer HD
Bitmaps are temporarily stored on your hard disk and can be loaded
on demand, resulting in faster screen updates.
Buffer RAM
Bitmaps are temporarily stored in memory, allowing for fast access.
This is the choice for users with lots of memory, but no hard disk.
Click on 'Test' to check the result of your selections, or click on
the gadget to the left to open a file requester where you can select
a picture of your choice.
4.6 Select Screen Mode
-----------------------
Purpose: Screen Mode selection
Menu: "Project/Preferences/Display".
Use this requester to select the screen mode you want to use for
your work with PictureCat. The available modes strongly depend on
your hardware. 'The DoubleScan'-Modes are especially recommended, but
unfortunately these require the AA-graphics chip set currently only
available in Amiga 1200s and 4000s. Please note that these modes also
require a special 'MultiSync'-type monitor.
Third-party graphics cards which support Amiga-compatible screen
structures (such as the Picasso or the CyberVision 64) are also
supported.
Since PictureCat uses special dithering techniques to display
pictures, a screen mode supporting at least 16 colours is required to
run the program. Although a 256-colour display will generate the best
results, 128 colours will normally be preferred as the best compromise
between display quality and speed.
Note that the Amiga's 'HAM' mode might be superiour to a 16 colour
display in many cases. Furthermore, it may also be much quicker than
the normal 128 colour screen, because it only requires 6 bit (=64
colours). Unfortunately, this speed increase leads to a loss of
display clarity, as only every third pixel can be assigned the correct
colour in HAM mode.
The 'Y-Aspect' function opens a test window which helps you to
maintain the correct aspect on-screen, avoiding the distorted display of
circles, etc.