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GREDA
Graphics Editor and Animator
Version 1.00
User's Guide
Copyright (c) 1993 - Robert Dobbins
All Rights Reserved
Shareware Version
────────────────────────────────────────────────────────────────────────────
Table of Contents
────────────────────────────────────────────────────────────────────────────
Introduction ................................................... 1
Installation ................................................... 1
Hardware and Software Requirements ............................. 2
Using GREDA .................................................... 2
General Behavior ............................................... 3
Configuring GREDA .............................................. 4
Screen Layout .................................................. 5
Menu Tree ...................................................... 6
Creating an Image File ......................................... 9
Editing an Image File .......................................... 9
Saving an Image File .......................................... 10
File Buttons .................................................. 10
Menu Buttons .................................................. 10
Color Buttons ................................................. 12
Image Positioning ............................................. 12
Color Palette Editor .......................................... 13
Acknowledgements .............................................. 16
GREDA User's Guide Page: 1
────────────────────────────────────────────────────────────────────────────
Introduction
────────────────────────────────────────────────────────────────────────────
GREDA was designed for the development of sprites, backgrounds, and animated
sequences using the VGA (video graphics array) 320x200, 256-color mode. The
program employs a graphical user interface (GUI) to invoke menu selections.
The user will move the mouse cursor to a menu item and click the left button
of the mouse to select.
Each graphics image or animated sequence is stored in a file on the
computer's disk. Animated sequences are stored sequentially in the file as
a database. Each image is called a frame, and each frame will use the same
height and width as originally defined by the user.
These animated sequences and backgrounds may be used later to develop games
that use the VGA 256-color mode. GREDA comes with some sample C source code
to display and move these images around on the display. The file formats
are revealed in that code.
────────────────────────────────────────────────────────────────────────────
Installation
────────────────────────────────────────────────────────────────────────────
GREDA and its associated files will take up about 1.2Mb on the average hard
disk drive (32Mb). This amount may vary according to the particular drive
type.
To install GREDA, make a directory on your hard disk drive:
MD \GREDA ──┘
Change to that directory:
CD \GREDA ──┘
Copy the self-extracting archived file GREDARC.EXE to the directory:
COPY A:\GREDARC.EXE ──┘
Type the name of that file at the DOS prompt:
GREDARC ──┘
The self-extracting file will create the following files:
GREDA.EXE - Graphics editor and animator.
GREDA.CFG - GREDA configuration file.
GREDA.PAL - Sample color palette.
HELV.008 - Helvetica style font, 8-high.
HELV.014 - Helvetica style font, 14-high.
HELV.016 - Helvetica style font, 16-high.
HELV.019 - Helvetica style font, 19-high.
GREDAMAN.TXT - This User's Guide.
RODENT.GGF - Greda graphics file of mouse.
RODENT.PAL - Greda color palette for RODENT.
MACAW.GGF - Macaw converted from PIC.
MACAW.PAL - Color palette for MACAW.
CHEETAH.GGF - Cheetah converted from PIC.
CHEETAH.PAL - Color palette for CHEETAH.
TEST2.GGF - Sample hand-drawn screen.
GREDA User's Guide Page: 2
TEST2.PAL - Color palette for TEST2.
FALL.GGF - Converted from PIC.
FALL.PAL - Color palette for FALL.
CLOWN.GGF - Clown converted from PIC.
CLOWN.PAL - Color palette for CLOWN.
PEPSI.GGF - Pepsi can converted from GIF.
PEPSI.PAL - Color palette for PEPSI.
SAMPLE.EXE - Sample developed with GREDA and associated files.
SAMPLE.C - Source code for sample.
SAMPLE.LNK - Link response file for sample.
VGA.H - Header file for GREDA library (GIDL.LIB).
GIDL.LIB - GREDA Image Display (large model) library.
SAMPLE.PAL - Color palette for sample.
BOY.GGF - Graphics animation file for sample.
BOY2.GGF - Graphics animation file for sample.
GIRL.GGF - Graphics animation file for sample.
GIRL2.GGF - Graphics animation file for sample.
STAGE.GGF - Graphics background for sample.
────────────────────────────────────────────────────────────────────────────
Hardware and Software Requirements
────────────────────────────────────────────────────────────────────────────
GREDA requires version 3.20 or higher version of MS- or PC-DOS, an IBM or
compatible computer with a VGA adapter, a Microsoft or compatible 2-button
mouse, and 420k of available memory. GREDA works best with a hard disk
drive and disk caching, which improves file save/retrieve performance and a
computer using VESA bus architecture which greatly improves the video
performance.
GREDA has been tested on IBM model 50,60,70, and 80, and a Gateway 2000 with
500 Mb hard drive and VESA bus. GREDA was found to work flawlessly using
these systems. If the user has any trouble with this software they are
encouraged to notify the developer.
────────────────────────────────────────────────────────────────────────────
Using GREDA
────────────────────────────────────────────────────────────────────────────
To run GREDA, from the DOS prompt change to the directory where the program
resides:
CD \GREDA ───┘
Then invoke the program by type the name and pressing the enter key:
GREDA ───┘
GREDA responds to the following command line arguments:
/? - Displays information about the program.
/S - Skips the program logo.
/I - Skips the program logo.
/P - Displays the shareware product information.
GREDA User's Guide Page: 3
After initializing the mouse driver, GREDA will display the logo screen.
After about 20 seconds, the program will display the image editor.
GREDA uses selection buttons by which the user will invoke menu selections.
To invoke a selection, the user must move the mouse cursor onto the item and
click the left button on the mouse. The program will display the button as
pressed (shift right and down one pixel) until the user releases the mouse
button.
────────────────────────────────────────────────────────────────────────────
General Behavior
────────────────────────────────────────────────────────────────────────────
The program has been designed such that certain keyboard and mouse
operations will be interpreted in a consistent manner. Following is a list
of these behaviors:
Mouse:
Left Button - Select, place color onto image.
Right Button - Cancel or [Esc] from menus.
Picks up current color from an image.
Restores color in color palette editor.
Mouse Cursor - When the mouse cursor is in the image area, the program
will display the mouse cursor in some unique and
identifiable shape other than the arrow.
When the mouse cursor is not in the image area, it will be
displayed in the shape of an arrow.
Key Strokes:
[Esc] - Cancel
[Ins] - Toggle insert/overstrike mode
[Del] - Delete character at cursor
[BkSp] - Delete character left of cursor
[Home] - Move cursor to beginning of line
[End] - Move cursor to end of line
[Ctrl]+[End] - Delete characters from cursor to end of line
──┘ - Accept entry
[-] - Cursor left
[-] - Cursor right
[Tab] - Tab right
[Shift]+[Tab] - Tab left
Text Cursor - When the program is waiting for user data entry, the
underline cursor will indicate overstrike typing. The block
cursor will indicate insert typing.
GREDA User's Guide Page: 4
────────────────────────────────────────────────────────────────────────────
Configuring GREDA
────────────────────────────────────────────────────────────────────────────
┌────────────────────────────────────┐
│ Horiz Mickeys: ░░░ │
│ │
│ Vert Mickeys: ░░░ │
│ │
│ Speed Threshold: ░░░ │
│ │
│ Default File Ext: ░░░ │
│ │
│ Auto Save? Y/N: ░ │
│ │
│ Auto Palette? Y/N: ░ │
└────────────────────────────────────┘
┌───────────────────┐
│Horiz Mickeys │
└───────────────────┘
This sets the horizontal relationship between the mouse device movement and
the mouse cursor on the display.
┌───────────────────┐
│Vert Mickeys │
└───────────────────┘
This sets the vertical relationship between the mouse device movement and
the mouse cursor on the display.
┌───────────────────┐
│Speed Threshold │
└───────────────────┘
This defines the point at which the mouse driver initiates double-speed
movement of the mouse cursor.
┌───────────────────┐
│Default File Ext │
└───────────────────┘
This is the default file extension for graphics image files. The as-shipped
default is ".GGF" (Greda Graphics File).
┌───────────────────┐
│Auto Save? Y/N │
└───────────────────┘
When this option is set to 'Y', the program will automatically save images
to disk when changes have been made and the user invokes any function that
will reposition the database, loads another file, or quits the application.
When this option is set to 'N', the program will prompt the user to save the
image to file.
GREDA User's Guide Page: 5
┌───────────────────┐
│Auto Palette? Y/N │
└───────────────────┘
If the user designs a color palette specifically for an image file, the user
should name that file by the same name (other than file extension) as the
image file (i.e. CHEETAH.GGF and CHEETAH.PAL). If the user sets this
configuration option to 'Y', then GREDA will automatically load color
palettes with the same filename.
────────────────────────────────────────────────────────────────────────────
Screen Layout
────────────────────────────────────────────────────────────────────────────
Following is textual representation of the GREDA display. Each button has
been labeled with a number and is defined in the next "Menu Tree" section.
┌─────────────────────────────┬──────┬──────┬──────┬──────┬────────────────┐
│1. │2. │3. │4. │5. │6. │
│File: │ << │ <- │ -> │ >> │ No │
├──────┬──────┬───────────────┴──────┴──────┴──────┴──────┴───────────┬────┤
│7. │8. │ │35. │
│ ? │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ ├────┤
│9. │10. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │36. │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ ├────┤
│11. │12. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │37. │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│13. │14. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│15. │16. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│17. │18. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ ├────┤
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │38. │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│19. │20. │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ ├────┤
│ │ │ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │39. │
├──────┼──────┤ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │ │
│21. │22. │ │ │
│ │ ├───────┬───────┬────────────────────────────┬───────┬──┴────┤
│ │ │30. << │31. <- │32. │33. -> │34. >> │
├──────┼──────┼───────┼───────┴────────────────────────────┴───────┼───────┤
│23. │24. │25. <- │27. │28. -> │
│ S │ C ├───────┤ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ ├───────┤
│ │ │26. << │ │29. >> │
└──────┴──────┴───────┴────────────────────────────────────────────┴───────┘
GREDA User's Guide Page: 6
────────────────────────────────────────────────────────────────────────────
Menu Tree
────────────────────────────────────────────────────────────────────────────
Following is the image editor menu tree. Each menu item begins with the
number associated with its position on the display in the previous "Screen
Layout" section. Like items are grouped into sections and labeled by the
boxed titles:
┌───────────────────────────┐
│File Buttons │
└───────────────────────────┘
1 - File Open/Create
2 - First Image Record
3 - Previous Image Record
4 - Next Image Record
5 - Last Image Record
6 - Current Image Record Number
┌───────────────────────────┐
│Menu Buttons │
└───────────────────────────┘
7 - Help
8 - Record
Retrieve Current Record
Save Current Record
Insert Before Record
Delete Current Record
9 - Pen
Height
Width
10 - Text
8, 14, 16, or 19 Pixel High Font
Normal Text
Color Phase Increase
Color Phase Decrease
Text With Shadow
Color Phase Increase & Shadow
Color Phase Decrease & Shadow
11 - Shapes
Line Draw
Rectangle
Outline
Fill
Color Phase
Brownian Horizontal
Brownian Vertical
Ellipse
Outline
Fill
Color Phase Center->Out
Color Phase Border->In
Starburst
GREDA User's Guide Page: 7
Polygon
Outline
Fill
Color Phase Center->Out
Color Phase Border->In
12 - Spray
Height
Width
DPS
13 - Color Palette
Edit Palette
Trend Start
Trend Stop
Generate Trend
Restore Colors
Keep
Cancel
Save Palette
Load Palette
14 - Region Fill
Fill With Color
Fill With Copy Buffer
Fill With Scheme
Step & Repeat Copy Buffer
Step & Repeat Scheme Buffer
Load Scheme Buffer From File
Release Scheme Buffer Memory
15 - Size, Rotation, Flip
Resize
Auto Minimize
Flip Vertically
Flip Horizontally
Rotate Left
Rotate Right
16 - Move Image Area
Up
Down
Left
Right
Keep
Abandon
17 - Magnification
Normal Size
Double Size
Quadruple Size
18 - Tools
Configure GREDA
Horiz Mickeys
Vert Mickeys
Speed Threshold
Default File Ext
Auto Save? Y/N
Auto Palette? Y/N
Available Memory
Search & Replace Color
Fill Image With Color
Erase Image Frame
GREDA User's Guide Page: 8
Export Functions
Data File
Mouse Pointer File
Color Palette File
Release Copy Buffer
Release Scheme Buffer
19 - Replay
Repeat
FPS
Method (L, B, S)
20 - Block Menu
Block Functions
Copy
Erase
Fill
Move
Color Phase
Increase Left->Right
Increase Right->Left
Increase Top->Bottom
Increase Bottom->Top
Search & Replace
Extract to Scheme File
Extract to Image File
Horizontal Random Shift
Vertical Random Shift
Replace Area With Copy Buffer
OR Area With Copy Buffer
AND Area With Copy Buffer
Load Copy Buffer From File
Release Copy Buffer Memory
21 - View
Load Screen Image
Erase Screen Image
View Current Frame
22 - Exit
Yes/No
┌───────────────────────────┐
│Color Buttons │
└───────────────────────────┘
23 - Search Color
24 - Current Color
25 - Previous 8 colors
26 - First 56 Colors
27 - 56 of 256 Available Colors
28 - Next 8 Colors
29 - Last 56 Colors
┌───────────────────────────┐
│Image Buttons Horizontal │
└───────────────────────────┘
These buttons will appear only when an image is loaded and the image width
is greater than 272. If the image height > 152, then these buttons will
appear when the image width is greater than 262.
GREDA User's Guide Page: 9
30 - Display Left Most Part of Image
31 - Shift Image Left 8 Pixels
32 - Nothing
33 - Shift Image Right 8 Pixels
34 - Display Right Most Part of Image
┌───────────────────────────┐
│Image Buttons Vertical │
└───────────────────────────┘
These buttons will appear only when an image is loaded and the image height
is greater than 152. If the image width is greater than 272, then these
buttons will appear when the image height is greater 142.
35 - Display Top Most Part of Image
36 - Shift Image Up 8 Pixels
37 - Nothing
38 - Shift Image Down 8 Pixels
39 - Display Bottom Most Part of Image
────────────────────────────────────────────────────────────────────────────
Creating an Image File
────────────────────────────────────────────────────────────────────────────
To create a new graphics image, the user must first click the left mouse
button on the FILE selection button (1). The program will display the
button pressed until the user releases the mouse button. A cursor will
appear in the file button window and the user should enter the name of the
file. A file extension will be appended if the user does not enter one and
the configuration specifies a default one.
While entering data into these fields, the user may abandon by either
pressing the escape key ([Esc]) or pressing the right button on the mouse.
After entering the new filename, GREDA will try to find one on the disk. If
the file does not exist, the program will request approval to create the new
file. After answering 'Y', the user will be prompted to define the height
and width of the image.
The maximum height of any image is 200 and the maximum width is 320. Images
cannot be defined as smaller than 1 in height or width.
After entering this information, GREDA will create the new file with a blank
image and set the record counter to 1. The user may select a drawing device
and begin painting the image.
────────────────────────────────────────────────────────────────────────────
Editing an Image File
────────────────────────────────────────────────────────────────────────────
To edit an existing graphics image, the user must first click the left mouse
button on the FILE selection button (1). The program will display the
button pressed until the user releases the mouse button. A cursor will
appear in the file button window and the user should enter the name of the
file. A file extension will be appended if the user does not enter one and
the configuration specifies a default one.
GREDA User's Guide Page: 10
The user may enter a DOS wild-card specification (i.e. *.GGF) and press the
enter key. GREDA will display the list of files that were found to meet
that specification. The user may select from that list by moving the mouse
cursor to the row of the file name and clicking the left button on the
mouse.
If the file exists, the program will open the file, display the first frame,
and set the record counter to 1. The user may select a drawing device and
begin editing the image.
────────────────────────────────────────────────────────────────────────────
Saving an Image File
────────────────────────────────────────────────────────────────────────────
To save the image to file, the user can move the mouse cursor to the record
menu item (8) and click the left mouse button. The program will display a
menu of choices. Click on the item labeled "Save Current Record". The
program will write the image to disk.
If the user has made changes to the current image and clicks on any of the
file buttons (1 through 5), GREDA will save the current record to disk
automatically if the user has specified "Auto Save = Y" in the
configuration. Otherwise, the program will prompt the user to save this
record to disk.
────────────────────────────────────────────────────────────────────────────
File Buttons
────────────────────────────────────────────────────────────────────────────
There are six buttons that are related to file and record position. These
buttons are laid out at the top of the display:
1 - File Open/Create Designate a file name for editing or
create a new file.
2 - First Image Record Move the record pointer to the first
image in the file.
3 - Previous Image Record Move the record pointer to the image
previous to one currently displayed.
4 - Next Image Record Move the record pointer to the image
after the one currently displayed.
5 - Last Image Record Move the record pointer to the last
image in the file.
6 - Current Image Record Number Display the current image number only.
────────────────────────────────────────────────────────────────────────────
Menu Buttons
────────────────────────────────────────────────────────────────────────────
The menu buttons are located on the left side of the display and are
distributed 2 across and 8 vertically. The menu buttons do not include the
search and current color buttons (23 and 24).
GREDA User's Guide Page: 11
7 - Help Display information about each menu
button.
8 - Record Record retrieve, save, insert, and delete.
9 - Pen Selects the pen drawing device. If the
pen is current, the program receives
input to define the height and width of
the drawing point.
10 - Text Text entry onto image. The user may
choose one of 4 different font heights and
options for shadow and color phase.
11 - Shapes Line draw, ellipse, rectangle, and
polygons can be generated with a variety
of options such as color phase, fill, and
starburst (ellipses only). The rectangle
drawing function can generate a Brownian
vertical or horizontal motion. This is
commonly used in generating fractal
landscapes.
12 - Spray Select the spray drawing device. Spray
is generated using random numbers and the
current paint color. If the spray is the
current drawing device, the program
receives input defining the height, width,
and spray rate.
13 - Color Palette Color palette editor, allows the user to
change 239 of the 256 colors available.
14 - Region Fill Fills areas of the current image with
color, step and repeat, and schemes.
15 - Size, Rotation, Flip Resize, rotate, or flip the image frame
vertically or horizontally.
16 - Move Image Area Shift the image area up, down, left, or
right.
17 - Magnification Set the editing size to 1, 2, or 4 times
the actual image size.
18 - Tools Various tools and utilities for GREDA
configuration, erasing and filling the
image frame, releasing buffers, and
functions to export the image and color
palette data to C source code.
19 - Replay Use this function to view an animated
sequence.
GREDA User's Guide Page: 12
20 - Block Menu Functions for block and copy, erase,
fill, generate color phase, extract
copy buffer to file.
21 - View View the current image frame at 1:1 with
the option of moving around in front of
a chosen background.
22 - Exit Quit GREDA and exit to DOS. The program
warns the user of any changes made to
the image and color palette and allows
the user to save them to file.
────────────────────────────────────────────────────────────────────────────
Color Buttons
────────────────────────────────────────────────────────────────────────────
The color buttons are located across the bottom the display. The program
displays the available colors on the color bar (27). The user may select a
color from the color bar or may pick a color from the current image by
pressing the right mouse button.
23 - Search Color The color to search for in any search
and replace operation.
24 - Current Color The current paint color. If the user
clicks on this button, the program
redisplays the color bar (27) at the
same offset that the color was selected.
25 - Previous 8 colors Shifts the color bar eight colors to the
left.
26 - First 56 Colors Displays the color bar beginning with the
first 56 colors.
27 - 56 of 256 Available Colors The color bar displays 56 of the 256
colors. The user can select a color by
moving the mouse cursor to a displayed
color and click the left mouse button.
28 - Next 8 Colors Shifts the color bar eight colors to the
right.
29 - Last 56 Colors Displays the color bar beginning with the
last 56 colors.
────────────────────────────────────────────────────────────────────────────
Image Positioning
────────────────────────────────────────────────────────────────────────────
If the frame size at the current magnification exceeds the size of the image
area, GREDA will display image positioning buttons as needed for the
vertical and horizontal. Double arrows indicate positioning at the
beginning or end, and single arrows indicate shifting the image by eight
pixels in that direction.
GREDA User's Guide Page: 13
────────────────────────────────────────────────────────────────────────────
Color Palette Editor
────────────────────────────────────────────────────────────────────────────
To edit the current color palette, move the mouse cursor to the menu button
with the picture of a painter's palette (button number 13) and click the
left mouse button. The program will display the color palette editor. Upon
entering the editor the current selected color (2) will be the same as the
current paint color that was selected while in the image editor (button
number 24). Color numbers 1 - 16 and 256 are reserved and cannot be changed
by the user.
┌──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┬──┐┌────────────────────────┐
│1.│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││3. │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ Blu │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ │
├──╔══╗──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ Red ▓▓▓▓▓▓ │
│ ║2.║ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ ▓▓▓▓▓▓ │
├──╚══╝──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ ░░░░░░ Grn ▓▓▓▓▓▓ │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ ░░░░░░ ▓▓▓▓▓▓ │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ ░░░░░░ ▒▒▒▒▒▒ ▓▓▓▓▓▓ │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ ░░░░░░ ▒▒▒▒▒▒ ▓▓▓▓▓▓ │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤├────────────────────────┤
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││4.▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤└────────────────────────┘
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │┌────────────────────────┐
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│5. │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ Trend Start: │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤├────────────────────────┤
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││6. │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ Trend Stop: │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │├────────────────────────┤
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│7. │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ Generate Trend │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤├────────────────────────┤
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││8. │
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│ Restore Colors │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │├────────────┬───────────┤
├──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┼──┤│9. │10. │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ││ Keep │ Cancel │
└──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┘└────────────┴───────────┘
┌─────────────────────────────────────────────────────────────────────────┐
│11. │
│ Color No: Red: Green: Blue: │
└─────────────────────────────────────────────────────────────────────────┘
GREDA User's Guide Page: 14
┌───────────────────────────┐
│Color Palette │
└───────────────────────────┘
1 - 256 Colors (1 - 16 and 256 are reserved)
2 - Current Selected Color
┌───────────────────────────┐
│RGB Values │
└───────────────────────────┘
3 - Bar Chart Color Values
4 - Current Color Patch
┌───────────────────────────┐
│Menu Buttons │
└───────────────────────────┘
5 - Trend Start
6 - Trend Stop
7 - Generate Trend
8 - Restore Colors
9 - Keep
10 - Cancel
┌───────────────────────────┐
│Color Value Status │
└───────────────────────────┘
11 - Current Color Status
Color No
Red
Green
Blue
────────────────────────────────────────────────────────────────────────────
┌───────────────────────────┐
│Editing Colors │
└───────────────────────────┘
You can edit a single color at a time or generate a color "trend". To edit
a single color, move the mouse cursor to the color you want to edit and
press the left mouse button. The program will move the highlight box (2) to
the color. The values of red, green, and blue will be displayed in the
value box (3), a patch of that color will be displayed in 4, and 11 will
display the color number and the actual values for red, green, and blue
(RGB).
To change the RGB values, move the mouse cursor into the value box (3) to
the color bar (red, green, or blue) that you want to change. Click the left
mouse button to adjust the amount of each RGB value. While holding the left
mouse button down, the user can move the mouse vertically to adjust the RGB
values. The new color will be displayed in the color patch (4), in the
currently selected color box (2), and the values displayed in the status box
(11).
GREDA User's Guide Page: 15
To restore a single color to the same RGB values as assigned before entering
the palette editor, move the mouse cursor to that color and click the right
mouse button.
┌───────────────────────────┐
│Generating a Color Trend │
└───────────────────────────┘
Color trends are several colors in sequence that display a smooth range of
color values such as black to blue. The starting color (black) will contain
zero amounts of RGB values. Each color in sequence will use a slightly
higher percentage of blue until it reaches the target (Trend Stop) value.
Move the mouse cursor to a color and press the left mouse button. GREDA
will make that the current color. Then move the mouse cursor to the "Trend
Start" menu item and click the left mouse button. The program will display
the color number on the menu. You may edit the RGB values of this color to
your taste. Now move the mouse cursor the color that you want to designate
as the last color in the sequence and press the left mouse button. GREDA
will make this the current color. Now move the mouse cursor to the "Trend
Stop" menu item and click the left mouse button. The program will display
the color number on the menu. You may edit the RGB values. Now move the
mouse cursor to the "Generate Trend" menu item and click the mouse left
button. GREDA will change the RGB values of each color to generate a smooth
change from the start to stop values.
┌───────────────────────────┐
│Restore Colors │
└───────────────────────────┘
At any time, the user may restore the color palette to the values before
entering the palette editor by clicking on the "Restore Colors" button.
┌───────────────────────────┐
│Keep Colors │
└───────────────────────────┘
When the colors are acceptable, move the mouse cursor to the "Keep" menu
item and click the left mouse button. The program will keep those colors as
the current color palette. The user may edit these colors again and again.
To save these colors in a palette file, from the main menu click on the
color palette menu item (see Screen Layout, button number 13). Then select
"Save Palette" from the menu.
┌───────────────────────────┐
│Cancel Colors │
└───────────────────────────┘
If the changes you have made are unacceptable and you want to return to the
image editor, move the mouse cursor to the "Cancel" menu item and click the
left mouse button. The colors will be restored to the values prior to
entering the palette editor and the program will return to the image editor.
GREDA User's Guide Page: 16
────────────────────────────────────────────────────────────────────────────
Acknowledgements
────────────────────────────────────────────────────────────────────────────
IBM is trademark of International Business Machines
Gateway is a trademark of Gateway Corporation
ATT is a trademark of American Telephone and Telegraph Corporation
PC-DOS is copyrighted software from IBM
MS-DOS is copyrighted software from Microsoft Corporation
PaintBrush is copyrighted software from Microsoft Corporation
Windows is copyrighted software from Microsoft Corporation
256Paint is copyrighted software from Pod Bay Enterprises