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Specifies one of the transfer modes that can be used with the ink property.Syntax:

srcOrReverse

Examples:

set the ink of card field ID 8 to srcOrReverse

Use the srcOrReverse keyword to invert the color underneath the dark-colored parts of an object.

The ink property determines how an object's colors combine with the colors of the pixels underneath the object(glossary) to determine how the object's color is displayed.

The srcOrReverse transfer mode performs the following steps to compute the color of each pixel:

1. Each component of the color underneath the object--the number

  indicating the amount of red, green, or blue--is changed to its
  inverse. (If the color is expressed as three integers between zero
  and 255--one for each of red, green, and blue--then the inverse of
  each component is equal to 255 minus the component's value.)


The effect is that the darker an object is, the more transparent it is to the inverted color beneath. Black parts of an object completely invert the color underneath them, and white parts are completely opaque.

For example, suppose an object's color is 45,0,255, and the color of the pixels under the object is 20,45,100. The binary equivalent of the object's color is 00101101, 00000000, 11111111 and the binary equivalent of the inverse of the color underneath is 11101011, 11010010, 10011011

   11101111, 11010010, 11111111

and the object's displayed color is 239,210,255 (the decimal equivalent).

The srcOrReverse mode can be used only on Unix and Windows systems. On Mac OS systems, objects whose ink property is set to this mode appear as though their ink were set to srcCopy.

See also: ink (property),pixels (property),

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