RGBBackColor

Set background color to best match for current device

#include <Quickdraw.h> Color Quickdraw

void RGBBackColor(color );

RGBColor *RGBColor ; requested red, green, blue components

RGBBackColor sets the background color to the closest match it can find for

the current device.

RGBColor is a record type that specifies a color's red, green, and blue

components as 16-bit unsigned shorts.

Notes: This sets the background color to the closest match for the current device.

However, neither PlotCIcon nor any of the new color patterns are affected.

Before calling CopyBits with a pixMap as the source, set the background to

white.

Whatever RGB you choose will go into an rgbBkColor field if your current

port is a cGrafPort. This procedure will also place the pixel value closest to

that color in the bkColor field.

For old-style GrafPort's, the Quickdraw bkColor will be manufactured

from the high bit of each of the red, green, and blue components. The

resulting 3-bit number is used to pick one of the original 8 colors available

to Quickdraw as follows:

Value Color Red Green Blue

0 black 0x0000 0x0000 0x0000

1 yellow 0xFC00 0xF37D 0x052F

2 magenta 0xF2D7 0x0856 0x84EC

3 red 0xDD6B 0x08C2 0x06A2

4 cyan 0x0241 0xAB54 0xEAFF

5 green 0x0000 0x8000 0x11B0

6 blue 0x0000 0x0000 0xD400

7 white 0xFFFF 0xFFFF 0xFFFF