`nx_sim_page.nx` source

1// nx_sim_page.nx -- GENERIC sovereign packager: any base-relative Nishi sim wasm -> self-contained .html that runs
2// in any browser. Extracted at the 3rd sim (simlab/solarsim/gassim) per the DRY-at-3 rule: the blit JS is identical
3// across sims, only the title/description differ -> pass them as args (data-driven, not hardcoded). The emitted JS
4// does ONLY: BLIT our wasm framebuffer to the canvas via putImageData (copy bytes, NOT canvas drawing), drive the
5// sim each animation frame (ex.tick(0)), and forward R (reset = tick(3)) / space (pause). ALL physics + integer
6// rasterization live in the sovereign wasm (no JS logic, no canvas-draw, no float, no 3rd-party). Any sim that
7// exports init/tick/render/ww/hh/fb_off + treats tick(3) as reset works unchanged.
8// usage: nx_sim_page <in.wasm> <out.html> <title> <description>. license_tier: ORIGINAL
9import "nx_syscalls.nx"
10import "nx_base64.nx"
11
12func hw(fd: i64, s: *u8) -> i64 { var n: i64 = 0; while s[n] != (0 as u8) { n = n + 1 } sys_write(fd, s, n); return 0 }
13
14func main(argc: i64, argv: *i64) -> i64 {
15    if argc < 5 { hw(2, "usage: nx_sim_page <in.wasm> <out.html> <title> <description>\n" as *u8); return 2 }
16    let wpath: *u8 = argv[1] as *u8
17    let hpath: *u8 = argv[2] as *u8
18    let title: *u8 = argv[3] as *u8
19    let desc: *u8 = argv[4] as *u8
20    let wlen_p: *i64 = sys_mmap(8) as *i64
21    let wbytes: *u8 = sys_read_file(wpath, wlen_p)
22    if (wbytes as i64) == 0 { hw(2, "read wasm failed\n" as *u8); return 3 }
23    let wlen: i64 = wlen_p[0]
24    let b64: *u8 = sys_mmap(wlen * 2 + 64) as *u8
25    let b64len: i64 = b64_encode(wbytes, wlen, b64)
26
27    let fd: i64 = sys_openat_wr(hpath, 0x1a4)
28    if fd < 0 { hw(2, "open html failed\n" as *u8); return 4 }
29    hw(fd, "<!doctype html><html><head><meta charset='utf-8'><title>" as *u8); hw(fd, title)
30    hw(fd, "</title><style>body{background:#05070f;margin:0;display:flex;flex-direction:column;justify-content:center;align-items:center;height:100vh;font-family:sans-serif;color:#cdd}canvas{image-rendering:pixelated;width:512px;height:512px;border:1px solid #2a3140;background:#05070f}p{margin:6px}b{color:#8eb}</style></head><body><h2>" as *u8)
31    hw(fd, title)
32    hw(fd, "</h2><canvas id='c'></canvas><p id='hud'><b>R</b> reset &middot; <b>space</b> pause</p><p style='color:#778;font-size:12px;max-width:520px;text-align:center'>" as *u8)
33    hw(fd, desc)
34    hw(fd, " <br>100% Nishi: all physics + the integer rasterizer run in sovereign WASM; the browser only blits our framebuffer &amp; forwards keys (no JS logic, no float, no 3rd-party).</p><script>\n" as *u8)
35    hw(fd, "const B='" as *u8)
36    sys_write(fd, b64, b64len)
37    hw(fd, "';\nconst bytes=Uint8Array.from(atob(B),c=>c.charCodeAt(0));\nWebAssembly.instantiate(bytes).then(r=>{const ex=r.instance.exports;const W=Number(ex.ww()),H=Number(ex.hh()),off=Number(ex.fb_off());const cv=document.getElementById('c');cv.width=W;cv.height=H;const ctx=cv.getContext('2d');const img=ctx.createImageData(W,H);function blit(){const mem=new Uint8Array(ex.memory.buffer);for(let i=0;i<W*H;i++){const b=off+i*8;img.data[i*4]=mem[b];img.data[i*4+1]=mem[b+1];img.data[i*4+2]=mem[b+2];img.data[i*4+3]=255;}ctx.putImageData(img,0,0);}let paused=false;ex.init();function frame(){if(!paused){ex.tick(BigInt(0));ex.render();blit();}requestAnimationFrame(frame);}ex.render();blit();requestAnimationFrame(frame);document.addEventListener('keydown',function(e){const k=e.key.toLowerCase();if(k=='r'){ex.tick(BigInt(3));}else if(k==' '){paused=!paused;e.preventDefault();}ex.render();blit();});}).catch(e=>{document.body.innerHTML+='<pre>'+e.message+'</pre>';});\n</script></body></html>\n" as *u8)
38    sys_close(fd)
39    hw(1, "wrote sim page\n" as *u8)
40    return 0
41}
nx_sim_page.nx source

`nx_sim_page.nx` source
