Icons.png - minecraft.fandom.com

def draw_heart(x, y):
    if is_hardcore:
        v = 45
    else:
        v = 0

    # Draw background/outline
    if recently_changed:
        # White outline
        draw(x, y, 16 + 9, v, 9, 9)  # 25
    else:
        # Black outline
        draw(x, y, 16, v, 9, 9)

    if not is_absorption_heart:
        # Above check did not exist until 20w49a, causing invisible absorption hearts
        # https://bugs.mojang.com/browse/MC-18880
        if is_poisoned:
            u = 16 + 36  # 52
        elif is_withered:
            u = 16 + 72  # 88
        elif is_frozen:
            u = 16 + 126  # 142
        else:
            u = 16

    if recently_lost:
        # These are always drawn, but are overwritten in most cases
        # (They draw up to the previous health value, while the regular hearts
        # draw to the current health value)
        # This references a nonexistent texture when frozen:
        # https://bugs.mojang.com/browse/MC-206881
        if half_heart:
            draw(x, y, u + 54 + 9, v, 9, 9)  # 79 / 115 / 151 / 205 (invalid)
        else:
            draw(x, y, u + 54, v, 9, 9)  # 70 / 106 / 142 / 196 (invalid)

    if is_absorption_heart:
        # Prior to MC-18880 being fixed this could use missing textures
        # After the fix u is always 16
        if half_heart:
            draw(x, y, u + 144 + 9, v, 9, 9)  # 169
        else:
            draw(x, y, u + 144, v, 9, 9)  # 160
    else:
        if half_heart:
            draw(x, y, u + 36 + 9, v, 9, 9)  # 61 / 97 / 133 / 203
        else:
            draw(x, y, u + 36, v, 9, 9)  # 52 / 88 / 124 / 194

    # 34 and 43 (red outline, white outline) seem to be unused)

def draw_haunch(x, y):
    # Draw background/outline
    if has_hunger:
        # Green outline
        draw(x, y, 16 + 13 * 9, 27, 9, 9)  # 133
        u = 16 + 36  # 52
    else:
        # Black outline
        draw(x, y, 16, 27, 9, 9)
        u = 16

    if half_haunch:
        draw(x, y, u + 45, 27, 9, 9)  # 61 / 97
    else:
        draw(x, y, u + 36, 27, 9, 9)  # 52 / 88

    # 25, 34, 43, and 124 (white, red, white, and brown outlines) go unused
    # As are 70, 79, 106, 155 (lighter variants that could have served the same
    # purpose as recently lost hearts, but that doesn't really make sense for
    # hunger)