Function Block_ReadBrightness

src/Block.c:546–559

Reads network format 0b_US--_LLLL where U = uses fancy brightness, S = uses lamp brightness, and L = brightness */ Into CC's native format 0b_SSSS_BBBB where S = lamp brightness and B = lava brightness */

/* Reads network format    0b_US--_LLLL where U = uses fancy brightness, S = uses lamp brightness, and L = brightness */
/* Into CC's native format 0b_SSSS_BBBB where S = lamp brightness and B = lava brightness */
cc_uint8 Block_ReadBrightness(cc_uint8 fullBright) {
	cc_bool useSun;
	/* If the fullBright byte does not use the flag, we should interpret it as either completely dark or casting max block light */
	if ((fullBright & USE_MODERN_BRIGHTNESS_FLAG) == 0) { return fullBright > 0 ? FANCY_LIGHTING_MAX_LEVEL : 0; }

	useSun = fullBright & USE_LAMP_COLOR;

	/* Preserve only the least significant four bits. This gives us our raw brightness level for sun or block light. */
	fullBright &= BRIGHTNESS_MASK;

	/* Sun light is stored in the upper four bits */
	if (useSun) { fullBright <<= FANCY_LIGHTING_LAMP_SHIFT; }
	return fullBright;
}

/* Writes CC's native format 0b_SSSS_BBBB where S = lamp brightness and B = lava brightness */
/* into network format       0b_US--_LLLL where U = uses fancy brightness, S = uses lamp brightness, and L = brightness */