Large glass surfaces in modern buildings are now very fashionable. The sunlight through the glass warms up the interior. The most effective mean of the external shielding is the use of an aluminum shutter. However you do not have to be in dark while working or relaxing, because the louvers can be rotated up to 180 degrees.
Therefore, the amount of light entering is under your control. Thus, the primary heating effect of the sun does not get through the glass, the area of the interior temperature remains pleasant.