Font texture is u8;
Font texture is u8;

Originally we made the font texture f16 due to "clamping" of the
distance field, and kept it as floats (but f32 since conversion isn't
automatic with Vulkan) here.  However, clamping isn't really an issue.
You can increase the spread of the font to literally get a wider spread
of the SDF for glows, etc.  Switching to u8 uses 4x less texture memory,
which is significant.

bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr