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OS/2 Shareware BBS: 11 Util
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OS/2 Help File
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1993-07-22
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9KB
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277 lines
ΓòÉΓòÉΓòÉ 1. Keys Help ΓòÉΓòÉΓòÉ
The list of keys is arranged in groups:
ACCELERATOR KEYS
F3
Exit program
HELP KEYS
F1
Get help
F2
Get extended help (from within any help window)
Alt+F4
End help
F9
Go to a list of keys (from within any help window)
F11
Go to the help index (from within any help window)
Esc
Previous Help Panel, or End help if only one panel
Alt+F6
Go to/from help and programs
Shift+F10
Get help for help
ΓòÉΓòÉΓòÉ 2. Extended Help ΓòÉΓòÉΓòÉ
What Is Color Point?
Color Point is an OS/2 Presentation Manager program that continually reports
the value and English name of the color of the pel (pixel) that happens to be
under your OS/2 PM mouse pointer. The color value can be displayed according to
several different color representation models, including RGB (red, green,
blue), CMY (cyan, magenta, yellow), HSV (hue, saturation, value), etc.
Color Point is especially targetted to users of laptop and notebook PCs with
grayscale LCD displays. Editing OS/2 or Windows program icons, drawing charts,
obeying program instructions to "Press the red button", and so forth on such
systems is often difficult due to the user's inability to discern colors on the
gray display. Color Point was written in an effort to make these tasks easier.
Color Point might also be found useful by people who are color blind or who
have poor vision.
The Color Point Window
The Color Point window displays information about the pel (pixel) under the
mouse pointer.
o The "Screen Pointer Position" gives the X (horizontal) and Y (vertical)
position of the pointer on the screen. Coordinates [0,0] represent the lower
left corner of the screen.
o The "Color Value" gives a description of the color in terms of the color
model that has been selected.
o The "Color Name" gives a technical name for the color and, in parentheses, a
more descriptive artistic name if one is available.
How Do I Get Rid Of That %$#@ Logo Screen?
Color Point consults your OS/2 system configuration parameters to determine
how long it should display its initial logo screen. After you install OS/2,
the logo panel display time is 'indefinite', and you must press ENTER to
dismiss the panel. You may change the logo panel display time to any desired
value in milliseconds, including 0, in one of the following ways:
o Under OS/2 PM 1.3, bring up the Desktop Manager menu and select the "Group -
Utilities" option. Under this menu, select the Control Panel application.
The logo display time value can be changed via an action bar menu item.
o Under OS/2 PM 2.0 with the Workplace Shell (WPS), open the "OS/2 System"
folder on the desktop. Under this folder, open the "System Setup" folder,
and select the System icon under this folder. The logo display time value
can be changed via one of the notebook 'tabs'.
ΓòÉΓòÉΓòÉ 3. Help For 'Exit' ΓòÉΓòÉΓòÉ
Selecting this menu option will end the program.
ΓòÉΓòÉΓòÉ 4. Help For 'Color Model' ΓòÉΓòÉΓòÉ
This option provides you a choice as to how the color information will be
presented in the window. A list of color models will be displayed for you to
choose from.
Color information can be represented in a number of different ways based on the
particular color model being used. The default color model used by Color Point
is the RGB color model.
For complete technical information on color models, please see:
Computer Graphics: Principles and Practice, Foley, van Dam, Feiner, and
Hughes, Second Edition, 1990, Addison-Wesley, ISBN 0-201-12110-7.
ΓòÉΓòÉΓòÉ 5. The RGB Color Model ΓòÉΓòÉΓòÉ
In the RGB color model, each color is represented as a combination of the three
primary colors red, green, and blue. These three colors are additive primaries,
so any arbitrary color can be expressed as result of the addition of various
amounts of the three colors.
Black is the result of the addition of 0 parts red, 0 parts green, and 0 parts
blue; white is the result of the addition of maximum red, maximum green, and
maximum blue. Magenta is the result of the addition of equal parts red and
blue.
The RGB color model is most often used to represent colors on color CRT
monitors.
ΓòÉΓòÉΓòÉ 6. The CMY Color Model ΓòÉΓòÉΓòÉ
In the CMY color model, each color is represented as a combination of the three
primary colors cyan, magenta, and yellow. These three colors are subtractive
primaries, so any arbitrary color can be expressed as result of the subtraction
of various amounts of the three colors from white light.
White is the result of the subtraction of 0 parts cyan, 0 parts magenta, and 0
parts yellow from white light; black is the result of the subtraction of
maximum cyan, maximum magenta, and maximum yellow from white light. Red is the
result of the subtraction of equal parts magenta and yellow from white light.
The CMY color model is most often used to represent colors on devices which use
colored inks or paints, such as color printers.
ΓòÉΓòÉΓòÉ 7. The CMYK Color Model ΓòÉΓòÉΓòÉ
The CMYK color model is much like the CMY color model, but it includes black
(the 'K' in CMYK) as a fourth color.
The CMYK color model is used in the four-color printing process.
ΓòÉΓòÉΓòÉ 8. The YIQ Color Model ΓòÉΓòÉΓòÉ
In the YIQ color model, each color is represented as a combination of three
components: the luminance (Y) and the chromaticity (I and Q).
The YIQ color model is used by the U.S. commercial television broadcasting
industry. Color values are encoded in the YIQ model and broadcast to
televisions. Black-and-white televisions use only the Y component, and color
televisions use the I and Q components as well as the Y component.
ΓòÉΓòÉΓòÉ 9. The HSV (HSB) Color Model ΓòÉΓòÉΓòÉ
In the HSV color model (sometimes referred to as the HSB color model), each
color is represented as a combination of hue, saturation, and value (sometimes
referred to as 'brightness'.)
The hue is an angle value, measured around an imaginary axis where red is at 0
degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through
cyan, blue, magenta, and back around to red.
Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are
whitish/grayish colors and higher values are more vivid colors.
Value, or brightness, is the magnitude of the color's intensity, or brightness.
Note: With this menu option, all values are normalized to fall between 0 and
255. This is how HSV colors are represented in OS/2 and Windows.
The HSV color model is a user-oriented color system designed to be familiar to
artists and other users of color.
ΓòÉΓòÉΓòÉ 10. The HSV (HSB) Color Model (Degrees) ΓòÉΓòÉΓòÉ
In the HSV color model (sometimes referred to as the HSB color model), each
color is represented as a combination of hue, saturation, and value (sometimes
referred to as 'brightness'.)
The hue is an angle value, measured around an imaginary axis where red is at 0
degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through
cyan, blue, magenta, and back around to red.
Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are
whitish/grayish colors and higher values are more vivid colors.
Value, or brightness, is the magnitude of the color's intensity, or brightness.
Note: With this menu option, hue values are represented as degree values,
saturation values are represented as values between 0.0 and 1.0, and the
value/brightness lies between 0 and 255.
The HSV color model is a user-oriented color system designed to be familiar to
artists and other users of color.
ΓòÉΓòÉΓòÉ 11. The HLS Color Model ΓòÉΓòÉΓòÉ
In the HLS color model, each color is represented as a combination of hue,
lightness, and saturation.
The hue is an angle value, measured around an imaginary axis where red is at 0
degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through
cyan, blue, magenta, and back around to red.
Lightness is a value ranging from 0.0 for black to 1.0 for white.
Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are
whitish/grayish colors and higher values are more vivid colors.
Note: With this menu option, all values are normalized to fall between 0 and
255.
The HLS color model is a user-oriented color system designed to be familiar to
artists and other users of color.
ΓòÉΓòÉΓòÉ 12. The HLS Color Model (Degrees) ΓòÉΓòÉΓòÉ
In the HLS color model, each color is represented as a combination of hue,
lightness, and saturation.
The hue is an angle value, measured around an imaginary axis where red is at 0
degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through
cyan, blue, magenta, and back around to red.
Lightness is a value ranging from 0.0 for black to 1.0 for white.
Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are
whitish/grayish colors and higher values are more vivid colors.
Note: With this menu option, hue values are represented as degree values,
lightness values lie between 0 and 255, and saturation values are represented
as values between 0.0 and 1.0.
The HLS color model is a user-oriented color system designed to be familiar to
artists and other users of color.
ΓòÉΓòÉΓòÉ 13. Help For 'Save Window Position' ΓòÉΓòÉΓòÉ
Select this option to be given the opportunity to save the current position of
the Color Point window on the screen. The program window will appear at this
saved position each time you start Color Point.
The window position data will be saved in a file named COLORPT.INI, which will
be created in the current directory. You may, if you wish, move COLORPT.INI to
any other directory listed in your DPATH environment variable string, and Color
Point will still be able to find it.
ΓòÉΓòÉΓòÉ 14. Help For 'Save Program Options' ΓòÉΓòÉΓòÉ
Select this option to be given the opportunity to save your current program
option selections, such as your selection of color model. These saved options
will be used each time you start Color Point.
The program options data will be saved in a file named COLORPT.INI, which will
be created in the current directory. You may, if you wish, move COLORPT.INI to
any other directory listed in your DPATH environment variable string, and Color
Point will still be able to find it.
ΓòÉΓòÉΓòÉ 15. Help For 'About' ΓòÉΓòÉΓòÉ
Use this choice to see information on the program's author, the program version
number, copyright information, etc.