Texture created for bitmap font glyph, with a fixed size in the font, this size could be much bigger than the needed size in application.
Then a scale factor is applied to these textures when drawn.
Now, instead, we will create smaller bitmaps and create texture from them with reduced texture size (that is not needed).
** This will affect both Video Memory and Ram needed to store glyphs**
For small glyphs (scale_factor<0.5) bilinear is not producing good quality images