2.7 Field Color Reversal The field color reversal means drawing a field to be able to see field overlapping by means of changing color of overlapping area of fields when drawing a field over an existing field. The user can set the field color reversal by using commands defined in Table 2.7.1. Table 2.7.1 Commands for Field Color Reversal Setting Both of foreground and background can be targets of field color reversal. Opacity of foreground and background affects to a color reversing. The effect of reversing becomes small with a fall of the opacity. The effect by specifying to reversal appears only when a field specified to reversal is drawn over an existing field.
The relation of an existing field and reversal specification of a drawing field is shown in Table 2.7.2. Table 2.7.2 The Relation of an Existing Field and Reversal Specification of a Drawing Field The user can calculate reversed color by the following expression. Reversed color = (z - x + 1) Ч (z - y + 1) Ч 255 z = x Ч y x = color of drawing field 255 y = color of existing field 255 The color of field is composed by the RGB color model of 256 scale. The above expression shows the calculation of each composition color (red, green, and blue). ESC/Label Command Reference Guide Rev.
L Page 39 Command Description ^LRa Label reverse print “^LR” specifies or cancels reversal of all field being contained in the label. Y: Specifies to reversal all field being contained in the label. N: Cancels reversal of all field being contained in the label. ^FR Field reverse print “^FR” specifies reversal of the current field. The setting of “^FR” have priority over setting “^LR”. ^F(Cr1,g1,b1,a1,i1,r2,g2,b2,a2,i2 Field color settings “^F(C” specifies or cancels reversal of foreground and background individually of the current field. The setting of “^F(C” have priority over setting of “^LR” and “^FR”. i1 (foreground), i2 (background) = D:
Applies reversal setting of “^LR” or “^FR” to the current field. R: Specifies reversal of the current field. N: Cancels reversal of the current field. Existing field Reversal specification of the drawing field Color of overlapping area of fields present specified reverse no present specified no reverse A field which was drawn by reversal specification is present. cancel no reverse