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applets
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Add GIF of the ripple applet

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master
Noah 2 years ago
parent 9cf3a96bfb
commit cd5d6d315a
5 changed files with 163 additions and 101 deletions
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  1. 3
      examples/ripple/README.md
  2. BIN
      examples/ripple/ripple.gif
  3. 241
      examples/ripple/wasm_exec.js
  4. 10
      go.mod
  5. 10
      go.sum

3
examples/ripple/README.md
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@ -0,0 +1,3 @@
# Ripple Applet
![GIF](ripple.gif)

BIN
examples/ripple/ripple.gif
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Binary file not shown.
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Width:  |  Height:  |  Size: 2.2 MiB

241
examples/ripple/wasm_exec.js
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@ -27,9 +27,18 @@
}
if (!global.fs && global.require) {
global.fs = require("fs");
const fs = require("fs");
if (Object.keys(fs) !== 0) {
global.fs = fs;
}
}
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!global.fs) {
let outputBuf = "";
global.fs = {
@ -45,27 +54,53 @@
},
write(fd, buf, offset, length, position, callback) {
if (offset !== 0 || length !== buf.length || position !== null) {
throw new Error("not implemented");
callback(enosys());
return;
}
const n = this.writeSync(fd, buf);
callback(null, n);
},
open(path, flags, mode, callback) {
const err = new Error("not implemented");
err.code = "ENOSYS";
callback(err);
},
read(fd, buffer, offset, length, position, callback) {
const err = new Error("not implemented");
err.code = "ENOSYS";
callback(err);
},
fsync(fd, callback) {
callback(null);
},
chmod(path, mode, callback) { callback(enosys()); },
chown(path, uid, gid, callback) { callback(enosys()); },
close(fd, callback) { callback(enosys()); },
fchmod(fd, mode, callback) { callback(enosys()); },
fchown(fd, uid, gid, callback) { callback(enosys()); },
fstat(fd, callback) { callback(enosys()); },
fsync(fd, callback) { callback(null); },
ftruncate(fd, length, callback) { callback(enosys()); },
lchown(path, uid, gid, callback) { callback(enosys()); },
link(path, link, callback) { callback(enosys()); },
lstat(path, callback) { callback(enosys()); },
mkdir(path, perm, callback) { callback(enosys()); },
open(path, flags, mode, callback) { callback(enosys()); },
read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
readdir(path, callback) { callback(enosys()); },
readlink(path, callback) { callback(enosys()); },
rename(from, to, callback) { callback(enosys()); },
rmdir(path, callback) { callback(enosys()); },
stat(path, callback) { callback(enosys()); },
symlink(path, link, callback) { callback(enosys()); },
truncate(path, length, callback) { callback(enosys()); },
unlink(path, callback) { callback(enosys()); },
utimes(path, atime, mtime, callback) { callback(enosys()); },
};
}
if (!global.process) {
global.process = {
getuid() { return -1; },
getgid() { return -1; },
geteuid() { return -1; },
getegid() { return -1; },
getgroups() { throw enosys(); },
pid: -1,
ppid: -1,
umask() { throw enosys(); },
cwd() { throw enosys(); },
chdir() { throw enosys(); },
}
}
if (!global.crypto) {
const nodeCrypto = require("crypto");
global.crypto = {
@ -113,24 +148,19 @@
this._scheduledTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const mem = () => {
// The buffer may change when requesting more memory.
return new DataView(this._inst.exports.mem.buffer);
}
const setInt64 = (addr, v) => {
mem().setUint32(addr + 0, v, true);
mem().setUint32(addr + 4, Math.floor(v / 4294967296), true);
this.mem.setUint32(addr + 0, v, true);
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
const getInt64 = (addr) => {
const low = mem().getUint32(addr + 0, true);
const high = mem().getInt32(addr + 4, true);
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = mem().getFloat64(addr, true);
const f = this.mem.getFloat64(addr, true);
if (f === 0) {
return undefined;
}
@ -138,66 +168,58 @@
return f;
}
const id = mem().getUint32(addr, true);
const id = this.mem.getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number") {
if (typeof v === "number" && v !== 0) {
if (isNaN(v)) {
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 0, true);
return;
}
if (v === 0) {
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 1, true);
this.mem.setUint32(addr + 4, nanHead, true);
this.mem.setUint32(addr, 0, true);
return;
}
mem().setFloat64(addr, v, true);
this.mem.setFloat64(addr, v, true);
return;
}
switch (v) {
case undefined:
mem().setFloat64(addr, 0, true);
return;
case null:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 2, true);
return;
case true:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 3, true);
return;
case false:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 4, true);
return;
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
}
let ref = this._refs.get(v);
if (ref === undefined) {
ref = this._values.length;
this._values.push(v);
this._refs.set(v, ref);
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
break;
case "string":
typeFlag = 1;
typeFlag = 2;
break;
case "symbol":
typeFlag = 2;
typeFlag = 3;
break;
case "function":
typeFlag = 3;
typeFlag = 4;
break;
}
mem().setUint32(addr + 4, nanHead | typeFlag, true);
mem().setUint32(addr, ref, true);
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
this.mem.setUint32(addr, id, true);
}
const loadSlice = (addr) => {
@ -232,11 +254,13 @@
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
const code = mem().getInt32(sp + 8, true);
const code = this.mem.getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._refs;
delete this._goRefCounts;
delete this._ids;
delete this._idPool;
this.exit(code);
},
@ -244,20 +268,25 @@
"runtime.wasmWrite": (sp) => {
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = mem().getInt32(sp + 24, true);
const n = this.mem.getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func nanotime() int64
"runtime.nanotime": (sp) => {
// func resetMemoryDataView()
"runtime.resetMemoryDataView": (sp) => {
this.mem = new DataView(this._inst.exports.mem.buffer);
},
// func nanotime1() int64
"runtime.nanotime1": (sp) => {
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime() (sec int64, nsec int32)
"runtime.walltime": (sp) => {
// func walltime1() (sec int64, nsec int32)
"runtime.walltime1": (sp) => {
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
mem().setInt32(sp + 16, (msec % 1000) * 1000000, true);
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
@ -276,12 +305,12 @@
},
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
));
mem().setInt32(sp + 16, id, true);
this.mem.setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
const id = mem().getInt32(sp + 8, true);
const id = this.mem.getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
@ -291,6 +320,18 @@
crypto.getRandomValues(loadSlice(sp + 8));
},
// func finalizeRef(v ref)
"syscall/js.finalizeRef": (sp) => {
const id = this.mem.getUint32(sp + 8, true);
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
}
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
storeValue(sp + 24, loadString(sp + 8));
@ -308,6 +349,11 @@
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
},
// func valueDelete(v ref, p string)
"syscall/js.valueDelete": (sp) => {
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
@ -327,10 +373,10 @@
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 56, result);
mem().setUint8(sp + 64, 1);
this.mem.setUint8(sp + 64, 1);
} catch (err) {
storeValue(sp + 56, err);
mem().setUint8(sp + 64, 0);
this.mem.setUint8(sp + 64, 0);
}
},
@ -342,10 +388,10 @@
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 40, result);
mem().setUint8(sp + 48, 1);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
mem().setUint8(sp + 48, 0);
this.mem.setUint8(sp + 48, 0);
}
},
@ -357,10 +403,10 @@
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 40, result);
mem().setUint8(sp + 48, 1);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
mem().setUint8(sp + 48, 0);
this.mem.setUint8(sp + 48, 0);
}
},
@ -384,35 +430,35 @@
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
mem().setUint8(sp + 24, loadValue(sp + 8) instanceof loadValue(sp + 16));
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
if (!(src instanceof Uint8Array)) {
mem().setUint8(sp + 48, 0);
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
mem().setUint8(sp + 48, 1);
this.mem.setUint8(sp + 48, 1);
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
if (!(dst instanceof Uint8Array)) {
mem().setUint8(sp + 48, 0);
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
mem().setUint8(sp + 48, 1);
this.mem.setUint8(sp + 48, 1);
},
"debug": (value) => {
@ -424,7 +470,8 @@
async run(instance) {
this._inst = instance;
this._values = [ // TODO: garbage collection
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id
NaN,
0,
null,
@ -433,10 +480,17 @@
global,
this,
];
this._refs = new Map();
this.exited = false;
const mem = new DataView(this._inst.exports.mem.buffer)
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map([ // mapping from JS values to reference ids
[0, 1],
[null, 2],
[true, 3],
[false, 4],
[global, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
@ -444,7 +498,7 @@
const strPtr = (str) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(mem.buffer, offset, bytes.length).set(bytes);
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
offset += bytes.length;
if (offset % 8 !== 0) {
offset += 8 - (offset % 8);
@ -458,17 +512,18 @@
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
argvPtrs.push(0);
const keys = Object.keys(this.env).sort();
argvPtrs.push(keys.length);
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
argvPtrs.push(0);
const argv = offset;
argvPtrs.forEach((ptr) => {
mem.setUint32(offset, ptr, true);
mem.setUint32(offset + 4, 0, true);
this.mem.setUint32(offset, ptr, true);
this.mem.setUint32(offset + 4, 0, true);
offset += 8;
});

10
go.mod
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@ -2,13 +2,7 @@ module git.kirsle.net/go/applets
go 1.13
replace git.kirsle.net/go/ui => /home/kirsle/go/src/git.kirsle.net/go/ui
replace git.kirsle.net/go/render => /home/kirsle/go/src/git.kirsle.net/go/render
require (
git.kirsle.net/go/render v0.0.0-20200102014411-4d008b5c468d
git.kirsle.net/go/ui v0.0.0-20191229080003-4ba563d48d6f
github.com/fsnotify/fsnotify v1.4.7 // indirect
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae // indirect
git.kirsle.net/go/render v0.0.0-20210104010442-b4a1979a8ba1 // indirect
github.com/fsnotify/fsnotify v1.4.9 // indirect
)

10
go.sum
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@ -1,13 +1,23 @@
git.kirsle.net/go/render v0.0.0-20200102014411-4d008b5c468d h1:vErak6oVRT2dosyQzcwkjXyWQ2NRIVL8q9R8NOUTtsg=
git.kirsle.net/go/render v0.0.0-20200102014411-4d008b5c468d/go.mod h1:ywZtC+zE2SpeObfkw0OvG01pWHQadsVQ4WDKOYzaejc=
git.kirsle.net/go/render v0.0.0-20210104010442-b4a1979a8ba1 h1:wGQLjBnWvqx7rU43yFG8ow4rnYqUMUwqorEkxdPaJ6Q=
git.kirsle.net/go/render v0.0.0-20210104010442-b4a1979a8ba1/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
git.kirsle.net/go/ui v0.0.0-20191229080003-4ba563d48d6f h1:upiac1ipv6cx0Um9uPSHTtwqVpmY1nctJi6mMxFdHTM=
git.kirsle.net/go/ui v0.0.0-20191229080003-4ba563d48d6f/go.mod h1:MWMEQKnc2LOKK9yXO49FxkAdt9uiTvVQPZH7N5tIXhY=
github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
github.com/veandco/go-sdl2 v0.4.1 h1:HmSBvVmKWI8LAOeCfTTM8R33rMyPcs6U3o8n325c9Qg=
github.com/veandco/go-sdl2 v0.4.1/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
github.com/veandco/go-sdl2 v0.4.5 h1:GFIjMabK7y2XWpr9sGvN7RDKHt7vrA7XPTUW60eOw+Y=
github.com/veandco/go-sdl2 v0.4.5/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
golang.org/x/image v0.0.0-20200119044424-58c23975cae1 h1:5h3ngYt7+vXCDZCup/HkCQgW5XwmSvR/nA2JmJ0RErg=
golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb h1:fqpd0EBDzlHRCjiphRR5Zo/RSWWQlWv34418dnEixWk=
golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9 h1:L2auWcuQIvxz9xSEqzESnV/QN/gNRXNApHi3fYwl2w0=
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

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