Signed-distance field of an alpha-coverage bitmap (width×height, values 0..1), encoded to
0..255 with 128 ≈ the glyph edge and radius controlling the spread. Inside the glyph reads
above 0.5 (normalized), outside below — matching the shader's smoothstep(0.5, …).
Signed-distance field of an alpha-coverage bitmap (
width×height, values 0..1), encoded to 0..255 with 128 ≈ the glyph edge andradiuscontrolling the spread. Inside the glyph reads above 0.5 (normalized), outside below — matching the shader'ssmoothstep(0.5, …).