nandi/vflutter_ffi · test_wasm.mjs

⑂ 472eb493bac94bdcb79a38829ccca0c541256fef

test_wasm.mjs · 67 lines · 2.6 KBJavaScript    Blame HistoryRaw
Add a WebAssembly backend for the example  nandithebull 1// Headless check of the wasm build: same contract as the native library.
2//   node tool/test_wasm.mjs [out.bin]
3// With an argument, writes the raw RGBA frame there so it can be diffed
4// against the native kernel (tool/test_wasm_parity.sh).
5import { createRequire } from 'node:module';
6import { writeFileSync } from 'node:fs';
8const require = createRequire(import.meta.url);
Replace V with Nim  nandithebull 9const createNimFlutterModule = require('../example/web/nimflutter.js');
10const M = await createNimFlutterModule();
Add a WebAssembly backend for the example  nandithebull 11
12let failures = 0;
13const check = (name, ok, detail = '') => {
14  console.log(`${ok ? 'ok  ' : 'FAIL'}  ${name}${detail ? ` — ${detail}` : ''}`);
15  if (!ok) failures++;
Replace V with Nim  nandithebull 18M.ccall('nf_init', null, [], []);
19check('nf_add', M.ccall('nf_add', 'number', ['number', 'number'], [20, 22]) === 42);
Add a WebAssembly backend for the example  nandithebull 20
Replace V with Nim  nandithebull 21// nf_greet returns a Nim-allocated string the caller must release.
Add a WebAssembly backend for the example  nandithebull 22const namePtr = M._malloc(16);
23M.stringToUTF8('wasm', namePtr, 16);
Replace V with Nim  nandithebull 24const resPtr = M.ccall('nf_greet', 'number', ['number'], [namePtr]);
Add a WebAssembly backend for the example  nandithebull 25const greeting = M.UTF8ToString(resPtr);
Replace V with Nim  nandithebull 26M.ccall('nf_free', null, ['number'], [resPtr]);
Add a WebAssembly backend for the example  nandithebull 27M._free(namePtr);
Replace V with Nim  nandithebull 28check('nf_greet', greeting === 'Hello, wasm, from Nim!', greeting);
Add a WebAssembly backend for the example  nandithebull 29
30const W = 240, H = 180, ITER = 300, BYTES = W * H * 4;
31const buf = M._malloc(BYTES);
33const fill = (len, y0, y1) => {
34  M.HEAPU8.fill(0, buf, buf + BYTES);
35
Replace V with Nim  nandithebull 36    'nf_mandelbrot',
Add a WebAssembly backend for the example  nandithebull 37
38    ['number', 'number', 'number', 'number', 'number', 'number', 'number', 'number', 'number', 'number'],
39    [buf, len, W, H, -0.5, 0.0, 3.0, ITER, y0, y1],
41  return M.HEAPU8.slice(buf, buf + BYTES);
44const frame = fill(BYTES, 0, H);
45check('every pixel has alpha', frame.every((v, i) => i % 4 !== 3 || v === 255));
46check('frame is a fractal, not a flat fill', new Set(frame).size > 8);
48// size_t is 32-bit on wasm32 — the guard has to hold there too.
49check('undersized buf_len writes nothing', fill(BYTES - 1, 0, H).every((v) => v === 0));
50check('zero buf_len writes nothing', fill(0, 0, H).every((v) => v === 0));
51check('inverted band writes nothing', fill(BYTES, 10, 2).every((v) => v === 0));
53// Band split must reassemble into the identical frame.
54const top = fill(BYTES, 0, H / 2).slice(0, (BYTES / 2));
55const bottom = fill(BYTES, H / 2, H).slice(0, (BYTES / 2));
56const joined = new Uint8Array(BYTES);
57joined.set(top, 0);
58joined.set(bottom, BYTES / 2);
59check('band split matches a single-shot render', joined.every((v, i) => v === frame[i]));
61M._free(buf);
63if (process.argv[2]) {
64  writeFileSync(process.argv[2], Buffer.from(frame));
65  console.log(`wrote ${process.argv[2]} (${frame.length} bytes)`);
67process.exit(failures === 0 ? 0 : 1);

Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	1	// Headless check of the wasm build: same contract as the native library.
	2	// node tool/test_wasm.mjs [out.bin]
	3	// With an argument, writes the raw RGBA frame there so it can be diffed
	4	// against the native kernel (tool/test_wasm_parity.sh).
	5	import { createRequire } from 'node:module';
	6	import { writeFileSync } from 'node:fs';
	7
	8	const require = createRequire(import.meta.url);
Replace V with Nim 472eb49 nandithebull 17h ago	9	const createNimFlutterModule = require('../example/web/nimflutter.js');
Replace V with Nim 472eb49 nandithebull 17h ago	10	const M = await createNimFlutterModule();
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	11
	12	let failures = 0;
	13	const check = (name, ok, detail = '') => {
	14	console.log(`${ok ? 'ok ' : 'FAIL'} ${name}${detail ? ` — ${detail}` : ''}`);
	15	if (!ok) failures++;
	16	};
	17
Replace V with Nim 472eb49 nandithebull 17h ago	18	M.ccall('nf_init', null, [], []);
Replace V with Nim 472eb49 nandithebull 17h ago	19	check('nf_add', M.ccall('nf_add', 'number', ['number', 'number'], [20, 22]) === 42);
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	20
Replace V with Nim 472eb49 nandithebull 17h ago	21	// nf_greet returns a Nim-allocated string the caller must release.
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	22	const namePtr = M._malloc(16);
	23	M.stringToUTF8('wasm', namePtr, 16);
Replace V with Nim 472eb49 nandithebull 17h ago	24	const resPtr = M.ccall('nf_greet', 'number', ['number'], [namePtr]);
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	25	const greeting = M.UTF8ToString(resPtr);
Replace V with Nim 472eb49 nandithebull 17h ago	26	M.ccall('nf_free', null, ['number'], [resPtr]);
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	27	M._free(namePtr);
Replace V with Nim 472eb49 nandithebull 17h ago	28	check('nf_greet', greeting === 'Hello, wasm, from Nim!', greeting);
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	29
	30	const W = 240, H = 180, ITER = 300, BYTES = W * H * 4;
	31	const buf = M._malloc(BYTES);
	32
	33	const fill = (len, y0, y1) => {
	34	M.HEAPU8.fill(0, buf, buf + BYTES);
	35	M.ccall(
Replace V with Nim 472eb49 nandithebull 17h ago	36	'nf_mandelbrot',
Add a WebAssembly backend for the example 728acaa nandithebull 18h ago	37	null,
	38	['number', 'number', 'number', 'number', 'number', 'number', 'number', 'number', 'number', 'number'],
	39	[buf, len, W, H, -0.5, 0.0, 3.0, ITER, y0, y1],
	40	);
	41	return M.HEAPU8.slice(buf, buf + BYTES);
	42	};
	43
	44	const frame = fill(BYTES, 0, H);
	45	check('every pixel has alpha', frame.every((v, i) => i % 4 !== 3 \|\| v === 255));
	46	check('frame is a fractal, not a flat fill', new Set(frame).size > 8);
	47
	48	// size_t is 32-bit on wasm32 — the guard has to hold there too.
	49	check('undersized buf_len writes nothing', fill(BYTES - 1, 0, H).every((v) => v === 0));
	50	check('zero buf_len writes nothing', fill(0, 0, H).every((v) => v === 0));
	51	check('inverted band writes nothing', fill(BYTES, 10, 2).every((v) => v === 0));
	52
	53	// Band split must reassemble into the identical frame.
	54	const top = fill(BYTES, 0, H / 2).slice(0, (BYTES / 2));
	55	const bottom = fill(BYTES, H / 2, H).slice(0, (BYTES / 2));
	56	const joined = new Uint8Array(BYTES);
	57	joined.set(top, 0);
	58	joined.set(bottom, BYTES / 2);
	59	check('band split matches a single-shot render', joined.every((v, i) => v === frame[i]));
	60
	61	M._free(buf);
	62
	63	if (process.argv[2]) {
	64	writeFileSync(process.argv[2], Buffer.from(frame));
	65	console.log(`wrote ${process.argv[2]} (${frame.length} bytes)`);
	66	}
	67	process.exit(failures === 0 ? 0 : 1);