Color Management

Owned by NetSarang Support
Apr 30, 2019
2 min read

Visual is a device-independent color system, which defines Xmanager's color format and the numbers of colors supported. Xmanager supports PseudoColor, StaticColor, DirectColor, TrueColor, GrayScale, and StaticGray, the six visuals defined in X window standards.
In PseudoColor visual, all X applications can only use 256 colors and thus application execution may fail due to an inadequate number of colors. Use the [Automatic Color Substitution(PseudoColor)] option to successfully run the application in case the color palette is insufficient due to another program.
Windows uses 20 system colors in 256-color mode to display title bars, window frames and icons. In some X applications, the whole 256-color palette is used to display the colors properly. In this case, the Windows desktop and icons may blink. Select the [Preserve System Colors (20 colors)] option to prevent this.
Additionally, Xmanager provides an RGB database, which is used to change color names to appropriate RGB values. Users can edit the database using a text editor.

To Change Default Server Visual:

  1. Run Xconfig.
  2. Double-click a profile. The Profile Properties dialog box is displayed.
  3. Click the [Color] tab.
  4. Select an appropriate visual from the [Choose Default Visual] list.
  5. Click [OK].
  • Note
    If the default visual is set as Auto Detect, Xmanager selects an appropriate visual according to the video device. In 256-color (8 bit) mode, it is set as PseudoColor. In true color (16 bit or higher) mode, it is set as TrueColor. The default visual is used by X root window and most applications. 

To Support Exact StoreColor Request (PseudoColor):

  1. Run Xconfig.
  2. Double-click a profile. The Profile Properties dialog box is displayed.
  3. Click the [Color] Tab.
  4. Select [Exact StoreColor (PseudoColor)].
  5. Click [OK].
  • Note
    When the true color video device operates with PseudoColor visual, StoreColor requests overloads and deteriorates overall performance. Xmanager provides an option to turn off Exact StoreColor.

To Operate True Color Video Device with 256-color Visual:

  1. Run Xconfig.
  2. Double-click a profile. The Profile Properties dialog box is displayed.
  3. Click the [Color] tab.
  4. Select PseudoColor from the [Choose Default Visual] list.
  5. Click the [Advanced] tab.
  6. Select [When Mapped] in [Backing Store].
  7. Click [OK].
  • Note
    Some older CAD programs operate in the 256-color system thus the default visual must be changed to PseudoColor to ensure successful execution.

To Change to RGB Format in TrueColor Visual:

  1. Run Xconfig.
  2. Double-click a profile. The Profile Properties dialog box is displayed.
  3. Click the [Color] tab.
  4. Select [RGB in Reverse Order(TrueColor)].
  5. Click [OK].
  • Note
    This function is useful when an X application requires a special RGB format.

To Change or Edit the RGB Color Database:

  1. Run Xconfig.
  2. Double-click a profile. The Profile Properties dialog box is displayed.
  3. Click the [Color] tab.
  4. Click [Change] or [View] in the [Color Database] field.
  5. Click [OK].