Initial SDL2 Ripple applet
This commit is contained in:
commit
9cf3a96bfb
1
.gitignore
vendored
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1
.gitignore
vendored
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@ -0,0 +1 @@
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*.wasm
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11
examples/ripple/Makefile
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11
examples/ripple/Makefile
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@ -0,0 +1,11 @@
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.PHONY: run
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run:
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go run main.go ripple.go
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.PHONY: wasm
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wasm:
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GOOS=js GOARCH=wasm go build -v -o ripple.wasm main_wasm.go ripple.go
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.PHONY: serve
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serve: wasm
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go run server.go
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41
examples/ripple/index.html
Normal file
41
examples/ripple/index.html
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@ -0,0 +1,41 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>go/render: hello wasm!</title>
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<style>
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#canvas {
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position: fixed;
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width: 100%;
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height: 100%;
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top: 0;
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right: 0;
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left: 0;
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bottom: 0;
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}
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</style>
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</head>
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<body>
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<script src="wasm_exec.js"></script>
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<script>
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if (!WebAssembly.instantiateStreaming) { // polyfill
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WebAssembly.instantiateStreaming = async (resp, importObject) => {
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const source = await (await resp).arrayBuffer();
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return await WebAssembly.instantiate(source, importObject);
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};
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}
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(function() {
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const go = new Go();
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WebAssembly.instantiateStreaming(fetch("ripple.wasm"), go.importObject).then(result => {
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console.clear();
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go.run(result.instance);
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WebAssembly.instantiate(result.module, go.importObject); // reset instance
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})
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})();
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</script>
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<canvas id="canvas"></canvas>
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</body>
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</html>
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114
examples/ripple/main.go
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114
examples/ripple/main.go
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@ -0,0 +1,114 @@
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package main
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import (
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"math"
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"math/rand"
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"time"
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"git.kirsle.net/go/render"
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"git.kirsle.net/go/render/sdl"
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)
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// Config variables.
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var (
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Filename = "photo.jpg"
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Width = 640
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Height = 480
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Quality = 4
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// computed.
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Size = Width * Height
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)
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// Runtime variables.
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var (
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app *App
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mw render.Engine
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TargetFPS = 1000 / 60 // run at 60fps
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)
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func main() {
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setup()
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mainloop()
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}
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// setup the applet
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func setup() {
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// Seed the random number generator.
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rand.Seed(time.Now().UnixNano())
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// Create SDL2 window.
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mw = sdl.New("Ripple effect", Width, Height)
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if err := mw.Setup(); err != nil {
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panic(err)
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}
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// Load the jpeg image.
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var err error
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photo, err := render.OpenImage(Filename)
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if err != nil {
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panic(err)
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}
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app = New(mw, photo)
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}
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// loop runs the applet logic for each loop.
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func loop() bool {
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app.Ripple()
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mw.Clear(render.White)
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// Poll events.
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ev, err := mw.Poll()
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if err != nil {
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panic(err)
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}
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// Escape key closes the program.
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if ev.Escape {
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mw.Teardown()
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return false
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}
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// Is mouse over the drawing?
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if ev.CursorX >= 0 && ev.CursorX < Width && ev.CursorY >= 0 && ev.CursorY < Width {
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app.Disturb(ev.CursorX, ev.CursorY, 15000)
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}
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// rain
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app.Disturb(
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int(math.Floor(rand.Float64()*float64(Width))),
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int(math.Floor(rand.Float64()*float64(Height))),
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int(rand.Float64()*10000),
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)
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app.Present()
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return true
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}
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// mainloop runs a loop of loop() while maintaing the frame rate.
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func mainloop() {
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var (
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start time.Time
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elapsed time.Duration
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ok bool
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)
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for {
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// Record how long the frame takes.
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start = time.Now()
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ok = loop()
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// Delay to maintain target frames per second.
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var delay uint32
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elapsed = time.Now().Sub(start) / time.Millisecond
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if TargetFPS-int(elapsed) > 0 {
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delay = uint32(TargetFPS - int(elapsed))
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}
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mw.Delay(delay)
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if !ok {
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break
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}
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}
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}
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136
examples/ripple/main_wasm.go
Normal file
136
examples/ripple/main_wasm.go
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@ -0,0 +1,136 @@
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// +build js,wasm
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package main
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import (
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"fmt"
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"image/jpeg"
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"math/rand"
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"net/http"
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"time"
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"git.kirsle.net/go/render"
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"git.kirsle.net/go/render/canvas"
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)
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// Config variables.
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var (
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Filename = "photo.jpg"
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Width = 640
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Height = 480
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Quality = 4
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// computed.
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Size = Width * Height
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)
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// Runtime variables.
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var (
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app *App
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mw *canvas.Engine
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TargetFPS = 1000 / 60 // run at 60fps
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)
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func main() {
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setup()
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go mainloop()
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for {
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time.Sleep(10 * time.Second)
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}
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}
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// setup the applet
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func setup() {
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var err error
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// Seed the random number generator.
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rand.Seed(time.Now().UnixNano())
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// Get the HTML Canvas.
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mw, err = canvas.New("canvas")
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if err != nil {
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panic(err)
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}
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// Configure the engine.
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err = mw.Setup()
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if err != nil {
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panic(err)
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}
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mw.AddEventListeners()
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// Fetch the image via HTTP.
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r, err := http.Get(Filename)
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if err != nil {
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panic(err)
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}
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// Parse it as a jpeg.
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photo, err := jpeg.Decode(r.Body)
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if err != nil {
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panic(err)
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}
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app = New(mw, photo)
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}
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// loop runs the applet logic for each loop.
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func loop() bool {
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app.Ripple()
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fmt.Println("loop")
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mw.Clear(render.White)
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// Poll events.
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ev, err := mw.Poll()
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if err != nil {
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panic(err)
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}
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// Is mouse over the drawing?
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if ev.CursorX >= 0 && ev.CursorX < Width && ev.CursorY >= 0 && ev.CursorY < Width {
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app.Disturb(ev.CursorX, ev.CursorY, 15000)
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}
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// rain
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// app.Disturb(
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// int(math.Floor(rand.Float64()*float64(Width))),
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// int(math.Floor(rand.Float64()*float64(Height))),
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// int(rand.Float64()*10000),
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// )
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app.Present()
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// test
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for pt := range render.IterLine(render.Origin, render.NewPoint(128, 128)) {
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mw.DrawPoint(render.Black, pt)
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}
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return true
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}
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// mainloop runs a loop of loop() while maintaing the frame rate.
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func mainloop() {
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var (
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start time.Time
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elapsed time.Duration
|
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ok bool
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)
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for {
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// Record how long the frame takes.
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start = time.Now()
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ok = loop()
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// Delay to maintain target frames per second.
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var delay uint32
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elapsed = time.Now().Sub(start) / time.Millisecond
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if TargetFPS-int(elapsed) > 0 {
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delay = uint32(TargetFPS - int(elapsed))
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}
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mw.Delay(delay)
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if !ok {
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break
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}
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}
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}
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BIN
examples/ripple/photo.jpg
Normal file
BIN
examples/ripple/photo.jpg
Normal file
Binary file not shown.
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After Width: | Height: | Size: 97 KiB |
123
examples/ripple/ripple.go
Normal file
123
examples/ripple/ripple.go
Normal file
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@ -0,0 +1,123 @@
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package main
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import (
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"image"
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"git.kirsle.net/go/render"
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)
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// App holds the ripple applet state.
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type App struct {
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e render.Engine
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image image.Image
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source *image.RGBA
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data *image.RGBA
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tex render.Texturer
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// computed
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width int
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height int
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size int
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// frame buffers
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buffer0 []int
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buffer1 []int
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}
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// New creates the ripple applet.
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func New(e render.Engine, i image.Image) *App {
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var (
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bounds = i.Bounds()
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width = bounds.Max.X
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height = bounds.Max.Y
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size = width * height
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)
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a := &App{
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e: e,
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image: i,
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source: render.ImageToRGBA(i),
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data: render.ImageToRGBA(i),
|
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width: width,
|
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height: height,
|
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size: size,
|
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buffer0: make([]int, size),
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buffer1: make([]int, size),
|
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}
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|
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tex, err := a.e.StoreTexture("pic", a.data)
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if err != nil {
|
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panic(err)
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}
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a.tex = tex
|
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return a
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}
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|
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// Disturb creates a disturbance in the water.
|
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func (a *App) Disturb(x, y, z int) {
|
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if x < 2 || x > Width-2 || y < 1 || y > Height-2 {
|
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return
|
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}
|
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var i = x + y*Width
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a.buffer0[i] += z
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a.buffer0[i-1] -= z
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}
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|
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// Ripple runs the ripple algorithm.
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func (a *App) Ripple() {
|
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var (
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width = a.width
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size = a.size
|
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)
|
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|
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// average cells to make the surface more even
|
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for i := width + 1; i < size-width-1; i += 2 {
|
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for x := 1; x < width-1; x++ {
|
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avg := (a.buffer0[i] + a.buffer0[i+1] + a.buffer0[i-1] + a.buffer0[i-width] + a.buffer0[i+width]) / 5
|
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a.buffer0[i] = avg
|
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i++
|
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}
|
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}
|
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|
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// Loop for every non-edge element.
|
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y := 0
|
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for i := width + 1; i < size-width-1; i += 2 {
|
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y++
|
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for x := 1; x < width-1; x++ {
|
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// Wave propagation
|
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waveHeight := (a.buffer0[i-1]+
|
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a.buffer0[i+1]+
|
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a.buffer0[i+Width]+
|
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a.buffer0[i-Width])/2 - a.buffer1[i]
|
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a.buffer1[i] = waveHeight
|
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|
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// Some very fake lighting
|
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var light = int(float64(waveHeight)*2.0 - float64(a.buffer1[i-2])*0.6)
|
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if light < -10 {
|
||||
light = -10
|
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} else if light > 100 {
|
||||
light = 100
|
||||
}
|
||||
|
||||
color := a.source.At(x, y)
|
||||
a.data.Set(x, y, render.FromColor(color).Lighten(light).ToColor())
|
||||
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
aux := a.buffer0
|
||||
a.buffer0 = a.buffer1
|
||||
a.buffer1 = aux
|
||||
|
||||
a.tex, _ = a.e.StoreTexture("pic", a.data)
|
||||
}
|
||||
|
||||
// Present the visual state.
|
||||
func (a *App) Present() {
|
||||
rect := render.Rect{
|
||||
W: a.width,
|
||||
H: a.height,
|
||||
}
|
||||
a.e.Copy(a.tex, rect, rect)
|
||||
a.e.Present()
|
||||
}
|
||||
127
examples/ripple/server.go
Normal file
127
examples/ripple/server.go
Normal file
|
|
@ -0,0 +1,127 @@
|
|||
// +build disabled
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io/ioutil"
|
||||
"log"
|
||||
"net/http"
|
||||
"os/exec"
|
||||
"path/filepath"
|
||||
|
||||
"github.com/fsnotify/fsnotify"
|
||||
)
|
||||
|
||||
func main() {
|
||||
const wasm = "/ripple.wasm"
|
||||
|
||||
// Watch the dev directory for changes.
|
||||
go watchChanges()
|
||||
|
||||
http.Handle("/", http.FileServer(http.Dir(".")))
|
||||
http.HandleFunc(wasm, func(w http.ResponseWriter, r *http.Request) {
|
||||
w.Header().Set("Content-Type", "application/wasm")
|
||||
http.ServeFile(w, r, "."+wasm)
|
||||
})
|
||||
|
||||
fmt.Println("Listening at http://localhost:8080/")
|
||||
log.Fatal(http.ListenAndServe(":8080", nil))
|
||||
}
|
||||
|
||||
// onChange handler to rebuild the wasm file automatically.
|
||||
func onChange() {
|
||||
out, err := exec.Command("make", "wasm").Output()
|
||||
if err != nil {
|
||||
log.Printf("error: %s", err)
|
||||
}
|
||||
log.Printf("%s", out)
|
||||
log.Printf("Doodle WASM file rebuilt")
|
||||
}
|
||||
|
||||
// Watch the Doodle source tree for changes to Go files and rebuild
|
||||
// the wasm binary automatically.
|
||||
func watchChanges() {
|
||||
watcher, err := fsnotify.NewWatcher()
|
||||
if err != nil {
|
||||
log.Printf("error: %s", err)
|
||||
return
|
||||
}
|
||||
defer watcher.Close()
|
||||
|
||||
done := make(chan bool)
|
||||
go func() {
|
||||
log.Println("Starting watch files loop")
|
||||
for {
|
||||
select {
|
||||
case event, ok := <-watcher.Events:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("event: %s", event)
|
||||
if event.Op&fsnotify.Write == fsnotify.Write {
|
||||
log.Printf("modified file: %s", event.Name)
|
||||
onChange()
|
||||
}
|
||||
case err, ok := <-watcher.Errors:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("error: %s", err)
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
log.Println("Adding source directory to watcher")
|
||||
dirs := crawlDirectory("../")
|
||||
|
||||
// Watch all these folders.
|
||||
for _, dir := range dirs {
|
||||
err = watcher.Add(dir)
|
||||
if err != nil {
|
||||
log.Printf("error: %s", err)
|
||||
}
|
||||
}
|
||||
<-done
|
||||
}
|
||||
|
||||
// Crawl the filesystem and return paths with Go files.
|
||||
func crawlDirectory(root string) []string {
|
||||
var (
|
||||
ext = ".go"
|
||||
result []string
|
||||
has bool
|
||||
)
|
||||
|
||||
files, err := ioutil.ReadDir(root)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
for _, file := range files {
|
||||
if file.Name() == ".git" {
|
||||
continue
|
||||
}
|
||||
|
||||
// Recursively scan subdirectories.
|
||||
if file.IsDir() {
|
||||
result = append(result,
|
||||
crawlDirectory(filepath.Join(root, file.Name()))...,
|
||||
)
|
||||
continue
|
||||
}
|
||||
|
||||
// This root has a file we want?
|
||||
if filepath.Ext(file.Name()) == ext {
|
||||
has = true
|
||||
}
|
||||
}
|
||||
|
||||
if has {
|
||||
result = append(result, root)
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
533
examples/ripple/wasm_exec.js
Normal file
533
examples/ripple/wasm_exec.js
Normal file
|
|
@ -0,0 +1,533 @@
|
|||
// Copyright 2018 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
(() => {
|
||||
// Map multiple JavaScript environments to a single common API,
|
||||
// preferring web standards over Node.js API.
|
||||
//
|
||||
// Environments considered:
|
||||
// - Browsers
|
||||
// - Node.js
|
||||
// - Electron
|
||||
// - Parcel
|
||||
|
||||
if (typeof global !== "undefined") {
|
||||
// global already exists
|
||||
} else if (typeof window !== "undefined") {
|
||||
window.global = window;
|
||||
} else if (typeof self !== "undefined") {
|
||||
self.global = self;
|
||||
} else {
|
||||
throw new Error("cannot export Go (neither global, window nor self is defined)");
|
||||
}
|
||||
|
||||
if (!global.require && typeof require !== "undefined") {
|
||||
global.require = require;
|
||||
}
|
||||
|
||||
if (!global.fs && global.require) {
|
||||
global.fs = require("fs");
|
||||
}
|
||||
|
||||
if (!global.fs) {
|
||||
let outputBuf = "";
|
||||
global.fs = {
|
||||
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
|
||||
writeSync(fd, buf) {
|
||||
outputBuf += decoder.decode(buf);
|
||||
const nl = outputBuf.lastIndexOf("\n");
|
||||
if (nl != -1) {
|
||||
console.log(outputBuf.substr(0, nl));
|
||||
outputBuf = outputBuf.substr(nl + 1);
|
||||
}
|
||||
return buf.length;
|
||||
},
|
||||
write(fd, buf, offset, length, position, callback) {
|
||||
if (offset !== 0 || length !== buf.length || position !== null) {
|
||||
throw new Error("not implemented");
|
||||
}
|
||||
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);
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
if (!global.crypto) {
|
||||
const nodeCrypto = require("crypto");
|
||||
global.crypto = {
|
||||
getRandomValues(b) {
|
||||
nodeCrypto.randomFillSync(b);
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
if (!global.performance) {
|
||||
global.performance = {
|
||||
now() {
|
||||
const [sec, nsec] = process.hrtime();
|
||||
return sec * 1000 + nsec / 1000000;
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
if (!global.TextEncoder) {
|
||||
global.TextEncoder = require("util").TextEncoder;
|
||||
}
|
||||
|
||||
if (!global.TextDecoder) {
|
||||
global.TextDecoder = require("util").TextDecoder;
|
||||
}
|
||||
|
||||
// End of polyfills for common API.
|
||||
|
||||
const encoder = new TextEncoder("utf-8");
|
||||
const decoder = new TextDecoder("utf-8");
|
||||
|
||||
global.Go = class {
|
||||
constructor() {
|
||||
this.argv = ["js"];
|
||||
this.env = {};
|
||||
this.exit = (code) => {
|
||||
if (code !== 0) {
|
||||
console.warn("exit code:", code);
|
||||
}
|
||||
};
|
||||
this._exitPromise = new Promise((resolve) => {
|
||||
this._resolveExitPromise = resolve;
|
||||
});
|
||||
this._pendingEvent = null;
|
||||
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);
|
||||
}
|
||||
|
||||
const getInt64 = (addr) => {
|
||||
const low = mem().getUint32(addr + 0, true);
|
||||
const high = mem().getInt32(addr + 4, true);
|
||||
return low + high * 4294967296;
|
||||
}
|
||||
|
||||
const loadValue = (addr) => {
|
||||
const f = mem().getFloat64(addr, true);
|
||||
if (f === 0) {
|
||||
return undefined;
|
||||
}
|
||||
if (!isNaN(f)) {
|
||||
return f;
|
||||
}
|
||||
|
||||
const id = mem().getUint32(addr, true);
|
||||
return this._values[id];
|
||||
}
|
||||
|
||||
const storeValue = (addr, v) => {
|
||||
const nanHead = 0x7FF80000;
|
||||
|
||||
if (typeof v === "number") {
|
||||
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);
|
||||
return;
|
||||
}
|
||||
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;
|
||||
}
|
||||
|
||||
let ref = this._refs.get(v);
|
||||
if (ref === undefined) {
|
||||
ref = this._values.length;
|
||||
this._values.push(v);
|
||||
this._refs.set(v, ref);
|
||||
}
|
||||
let typeFlag = 0;
|
||||
switch (typeof v) {
|
||||
case "string":
|
||||
typeFlag = 1;
|
||||
break;
|
||||
case "symbol":
|
||||
typeFlag = 2;
|
||||
break;
|
||||
case "function":
|
||||
typeFlag = 3;
|
||||
break;
|
||||
}
|
||||
mem().setUint32(addr + 4, nanHead | typeFlag, true);
|
||||
mem().setUint32(addr, ref, true);
|
||||
}
|
||||
|
||||
const loadSlice = (addr) => {
|
||||
const array = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
|
||||
}
|
||||
|
||||
const loadSliceOfValues = (addr) => {
|
||||
const array = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
const a = new Array(len);
|
||||
for (let i = 0; i < len; i++) {
|
||||
a[i] = loadValue(array + i * 8);
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
const loadString = (addr) => {
|
||||
const saddr = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
|
||||
}
|
||||
|
||||
const timeOrigin = Date.now() - performance.now();
|
||||
this.importObject = {
|
||||
go: {
|
||||
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
|
||||
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
|
||||
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
|
||||
// This changes the SP, thus we have to update the SP used by the imported function.
|
||||
|
||||
// func wasmExit(code int32)
|
||||
"runtime.wasmExit": (sp) => {
|
||||
const code = mem().getInt32(sp + 8, true);
|
||||
this.exited = true;
|
||||
delete this._inst;
|
||||
delete this._values;
|
||||
delete this._refs;
|
||||
this.exit(code);
|
||||
},
|
||||
|
||||
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
|
||||
"runtime.wasmWrite": (sp) => {
|
||||
const fd = getInt64(sp + 8);
|
||||
const p = getInt64(sp + 16);
|
||||
const n = mem().getInt32(sp + 24, true);
|
||||
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
|
||||
},
|
||||
|
||||
// func nanotime() int64
|
||||
"runtime.nanotime": (sp) => {
|
||||
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
|
||||
},
|
||||
|
||||
// func walltime() (sec int64, nsec int32)
|
||||
"runtime.walltime": (sp) => {
|
||||
const msec = (new Date).getTime();
|
||||
setInt64(sp + 8, msec / 1000);
|
||||
mem().setInt32(sp + 16, (msec % 1000) * 1000000, true);
|
||||
},
|
||||
|
||||
// func scheduleTimeoutEvent(delay int64) int32
|
||||
"runtime.scheduleTimeoutEvent": (sp) => {
|
||||
const id = this._nextCallbackTimeoutID;
|
||||
this._nextCallbackTimeoutID++;
|
||||
this._scheduledTimeouts.set(id, setTimeout(
|
||||
() => {
|
||||
this._resume();
|
||||
while (this._scheduledTimeouts.has(id)) {
|
||||
// for some reason Go failed to register the timeout event, log and try again
|
||||
// (temporary workaround for https://github.com/golang/go/issues/28975)
|
||||
console.warn("scheduleTimeoutEvent: missed timeout event");
|
||||
this._resume();
|
||||
}
|
||||
},
|
||||
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
|
||||
));
|
||||
mem().setInt32(sp + 16, id, true);
|
||||
},
|
||||
|
||||
// func clearTimeoutEvent(id int32)
|
||||
"runtime.clearTimeoutEvent": (sp) => {
|
||||
const id = mem().getInt32(sp + 8, true);
|
||||
clearTimeout(this._scheduledTimeouts.get(id));
|
||||
this._scheduledTimeouts.delete(id);
|
||||
},
|
||||
|
||||
// func getRandomData(r []byte)
|
||||
"runtime.getRandomData": (sp) => {
|
||||
crypto.getRandomValues(loadSlice(sp + 8));
|
||||
},
|
||||
|
||||
// func stringVal(value string) ref
|
||||
"syscall/js.stringVal": (sp) => {
|
||||
storeValue(sp + 24, loadString(sp + 8));
|
||||
},
|
||||
|
||||
// func valueGet(v ref, p string) ref
|
||||
"syscall/js.valueGet": (sp) => {
|
||||
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
|
||||
sp = this._inst.exports.getsp(); // see comment above
|
||||
storeValue(sp + 32, result);
|
||||
},
|
||||
|
||||
// func valueSet(v ref, p string, x ref)
|
||||
"syscall/js.valueSet": (sp) => {
|
||||
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
|
||||
},
|
||||
|
||||
// func valueIndex(v ref, i int) ref
|
||||
"syscall/js.valueIndex": (sp) => {
|
||||
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
|
||||
},
|
||||
|
||||
// valueSetIndex(v ref, i int, x ref)
|
||||
"syscall/js.valueSetIndex": (sp) => {
|
||||
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
|
||||
},
|
||||
|
||||
// func valueCall(v ref, m string, args []ref) (ref, bool)
|
||||
"syscall/js.valueCall": (sp) => {
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const m = Reflect.get(v, loadString(sp + 16));
|
||||
const args = loadSliceOfValues(sp + 32);
|
||||
const result = Reflect.apply(m, v, args);
|
||||
sp = this._inst.exports.getsp(); // see comment above
|
||||
storeValue(sp + 56, result);
|
||||
mem().setUint8(sp + 64, 1);
|
||||
} catch (err) {
|
||||
storeValue(sp + 56, err);
|
||||
mem().setUint8(sp + 64, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueInvoke(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueInvoke": (sp) => {
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.apply(v, undefined, args);
|
||||
sp = this._inst.exports.getsp(); // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
mem().setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
storeValue(sp + 40, err);
|
||||
mem().setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueNew(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueNew": (sp) => {
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.construct(v, args);
|
||||
sp = this._inst.exports.getsp(); // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
mem().setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
storeValue(sp + 40, err);
|
||||
mem().setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueLength(v ref) int
|
||||
"syscall/js.valueLength": (sp) => {
|
||||
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
|
||||
},
|
||||
|
||||
// valuePrepareString(v ref) (ref, int)
|
||||
"syscall/js.valuePrepareString": (sp) => {
|
||||
const str = encoder.encode(String(loadValue(sp + 8)));
|
||||
storeValue(sp + 16, str);
|
||||
setInt64(sp + 24, str.length);
|
||||
},
|
||||
|
||||
// valueLoadString(v ref, b []byte)
|
||||
"syscall/js.valueLoadString": (sp) => {
|
||||
const str = loadValue(sp + 8);
|
||||
loadSlice(sp + 16).set(str);
|
||||
},
|
||||
|
||||
// func valueInstanceOf(v ref, t ref) bool
|
||||
"syscall/js.valueInstanceOf": (sp) => {
|
||||
mem().setUint8(sp + 24, loadValue(sp + 8) instanceof loadValue(sp + 16));
|
||||
},
|
||||
|
||||
// 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);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
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);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
mem().setUint8(sp + 48, 1);
|
||||
},
|
||||
|
||||
"debug": (value) => {
|
||||
console.log(value);
|
||||
},
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
async run(instance) {
|
||||
this._inst = instance;
|
||||
this._values = [ // TODO: garbage collection
|
||||
NaN,
|
||||
0,
|
||||
null,
|
||||
true,
|
||||
false,
|
||||
global,
|
||||
this,
|
||||
];
|
||||
this._refs = new Map();
|
||||
this.exited = false;
|
||||
|
||||
const mem = new DataView(this._inst.exports.mem.buffer)
|
||||
|
||||
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
|
||||
let offset = 4096;
|
||||
|
||||
const strPtr = (str) => {
|
||||
const ptr = offset;
|
||||
const bytes = encoder.encode(str + "\0");
|
||||
new Uint8Array(mem.buffer, offset, bytes.length).set(bytes);
|
||||
offset += bytes.length;
|
||||
if (offset % 8 !== 0) {
|
||||
offset += 8 - (offset % 8);
|
||||
}
|
||||
return ptr;
|
||||
};
|
||||
|
||||
const argc = this.argv.length;
|
||||
|
||||
const argvPtrs = [];
|
||||
this.argv.forEach((arg) => {
|
||||
argvPtrs.push(strPtr(arg));
|
||||
});
|
||||
|
||||
const keys = Object.keys(this.env).sort();
|
||||
argvPtrs.push(keys.length);
|
||||
keys.forEach((key) => {
|
||||
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
|
||||
});
|
||||
|
||||
const argv = offset;
|
||||
argvPtrs.forEach((ptr) => {
|
||||
mem.setUint32(offset, ptr, true);
|
||||
mem.setUint32(offset + 4, 0, true);
|
||||
offset += 8;
|
||||
});
|
||||
|
||||
this._inst.exports.run(argc, argv);
|
||||
if (this.exited) {
|
||||
this._resolveExitPromise();
|
||||
}
|
||||
await this._exitPromise;
|
||||
}
|
||||
|
||||
_resume() {
|
||||
if (this.exited) {
|
||||
throw new Error("Go program has already exited");
|
||||
}
|
||||
this._inst.exports.resume();
|
||||
if (this.exited) {
|
||||
this._resolveExitPromise();
|
||||
}
|
||||
}
|
||||
|
||||
_makeFuncWrapper(id) {
|
||||
const go = this;
|
||||
return function () {
|
||||
const event = { id: id, this: this, args: arguments };
|
||||
go._pendingEvent = event;
|
||||
go._resume();
|
||||
return event.result;
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
if (
|
||||
global.require &&
|
||||
global.require.main === module &&
|
||||
global.process &&
|
||||
global.process.versions &&
|
||||
!global.process.versions.electron
|
||||
) {
|
||||
if (process.argv.length < 3) {
|
||||
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
|
||||
process.exit(1);
|
||||
}
|
||||
|
||||
const go = new Go();
|
||||
go.argv = process.argv.slice(2);
|
||||
go.env = Object.assign({ TMPDIR: require("os").tmpdir() }, process.env);
|
||||
go.exit = process.exit;
|
||||
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
|
||||
process.on("exit", (code) => { // Node.js exits if no event handler is pending
|
||||
if (code === 0 && !go.exited) {
|
||||
// deadlock, make Go print error and stack traces
|
||||
go._pendingEvent = { id: 0 };
|
||||
go._resume();
|
||||
}
|
||||
});
|
||||
return go.run(result.instance);
|
||||
}).catch((err) => {
|
||||
console.error(err);
|
||||
process.exit(1);
|
||||
});
|
||||
}
|
||||
})();
|
||||
14
go.mod
Normal file
14
go.mod
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
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
|
||||
)
|
||||
13
go.sum
Normal file
13
go.sum
Normal file
|
|
@ -0,0 +1,13 @@
|
|||
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/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/veandco/go-sdl2 v0.4.1 h1:HmSBvVmKWI8LAOeCfTTM8R33rMyPcs6U3o8n325c9Qg=
|
||||
github.com/veandco/go-sdl2 v0.4.1/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
|
||||
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/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=
|
||||
Loading…
Reference in New Issue
Block a user