Graphics Function: Returns the Red-Green-Blue (RGB) value of the current text color (used with OUTTEXT, WRITE and PRINT).
The result type is INTEGER(4). It is the RGB value of the current text color.
In each RGB color calue, each of the three colors, red, green, and blue, is represented by an eight-bit value (2 hex digits). In the value you retrieve with GETTEXTCOLORRGB, red is the rightmost byte, followed by green and blue. The RGB value's internal structure is as follows:
Larger numbers correspond to stronger color intensity with binary (hex Z'FF') the maximum for each of the three components. For example, Z'0000FF' yields full-intensity red, Z'00FF00' full-intensity green, Z'FF0000' full-intensity blue, and Z'FFFFFF' full-intensity for all three, resulting in bright white.
GETTEXTCOLORRGB returns the RGB color value of text over the background color (used by text functions such as OUTTEXT, WRITE, and PRINT), set with SETTEXTCOLORRGB. The RGB color value used for graphics is set and returned with SETCOLORRGB and GETCOLORRGB. SETCOLORRGB controls the color used by the graphics function OUTGTEXT, while SETTEXTCOLORRGB controls the color used by all other text output functions. The RGB background color value for both text and graphics is set and returned with SETBKCOLORRGB and GETBKCOLORRGB.
SETTEXTCOLORRGB (and the other RGB color selection functions SETBKCOLORRGB, and SETCOLORRGB) sets the color to a color value chosen from the entire available range. The non-RGB color functions (SETTEXTCOLOR, SETBKCOLOR, and SETCOLOR) use color indexes rather than true color values. If you use color indexes, you are restricted to the colors available in the palette, at most 256. Some display adapters (SVGA and true color) are capable of creating 262,144 (256K) colors or more. To access any available color, you need to specify an explicit RGB value with an RGB color function, rather than a palette index with a non-RGB color function.
! Build as QuickWin or Standard Graphics
INTEGER(4) oldtextc, oldbackc, temp
TYPE (rccoord) curpos
! Save color settings
oldtextc = GETTEXTCOLORRGB()
oldbackc = GETBKCOLORRGB()
CALL CLEARSCREEN( $GCLEARSCREEN )
! Reset colors
temp = SETTEXTCOLORRGB(Z'00FFFF') ! full red + full green
! = full yellow text
temp = SETBKCOLORRGB(Z'FF0000') ! blue background
CALL SETTEXTPOSITION( INT2(4), INT2(15), curpos)
CALL OUTTEXT( 'Hello, world')
! Restore colors
temp = SETTEXTCOLORRGB(oldtextc)
temp = SETBKCOLORRGB(oldbackc)