code wiki / _hdl_build / nx_font_baseline_census.nx
nx_font_baseline_census.nx
buildroot/runtime/_hdl_build/nx_font_baseline_census.nx
about
nx_font_baseline_census.nx -- the PROFESSIONAL-CONSISTENCY benchmark for the pioneer font: how much do the
letters BOUNCE off the baseline? Amateur type has a wandering baseline; professional type is dead-flat (round
letters overshoot by a small CONSTANT). Renders an all-x-height word ("consensus" -- no ascenders/descenders,
so every glyph's bottom IS the baseline) in OUR font and Chrome's Arial; segments letters by white-column
gaps; measures each letter's bottom row; reports the STANDARD DEVIATION of the bottoms, normalized by letter
height (permille) -> the bounce. Lower = more professional. LIAR-KILL: a synthetic ALIGNED row of bars must
read ~0 bounce and a deliberately BOUNCY row must read high -- else the metric is broken. license_tier:
ORIGINAL expect_exit: 0
dependencies 1 imports · 0 importers
imports: nx_img_bytes_to_rgb.nx
imported by: nobody (leaf or entry point)
call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown
structs
| none |
consts
| 10 | const K_MAGIC_2126: i64 = 2126 |
| 11 | const K_MAGIC_7152: i64 = 7152 |
| 12 | const K_MAGIC_10000: i64 = 10000 |
functions
| 14 | func fb_puts(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } called by 1: main |
| 15 | func fb_num(v: i64) -> i64 { let b: *u8=sys_mmap(28); var m: i64=v; if m<0{m=0-m;sys_write(1,"-" as *u8,1)} let t: *u8=sys_mmap(28); var k: i64=0; if m==0{t[0]=48 as u8;k=1} while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1} var i: i64=0; while i<k{b[i]=t[k-1-i];i=i+1} sys_write(1,b,k); return 0 } called by 1: main |
| 16 | func fb_lum(rgb: *u8, o: i64) -> i64 { return (K_MAGIC_2126*(rgb[o] as i64)+K_MAGIC_7152*(rgb[o+1] as i64)+722*(rgb[o+2] as i64))/K_MAGIC_10000 } called by 1: fb_measure |
| 17 | func fb_isqrt(n: i64) -> i64 { if n<=0 { return 0 } var x: i64=n; var y: i64=(x+1)/2; while y<x { x=y; y=(x+n/x)/2 } return x } called by 1: fb_measure |
| 21 | func fb_measure(rgb: *u8, w: i64, h: i64, out: *i64) -> i64 |
| 79 | func fb_load(path: *u8, wh: *i64) -> *u8 |
| 86 | func fb_make_bars(rgb: *u8, w: i64, h: i64, n: i64, jitter: i64) -> i64 called by 1: main |
| 105 | func main() -> i64 |