WebAssembly impress terminal

This is a part of cross-platform GUI Library for Go. See https://github.com/codeation/impress

The WebAssembly terminal is a tool for using the browser as a GUI canvas.

Reasons to have a browser version for a GUI app:

Access from anywhere to view some of the data created on the desktop.
Demonstration of desktop GUI application.
Periodically launched application with a graphical interface without installation on computer.

Hello world

Source:

package main

import (
    "image"
    "image/color"

    "github.com/codeation/impress"
    "github.com/codeation/impress/event"

    _ "github.com/codeation/impress/canvas"
)

func main() {
    app := impress.NewApplication(image.Rect(0, 0, 480, 240), "Hello World Application")
    defer app.Close()

    font := impress.NewFont(15, map[string]string{"family": "Verdana"})
    defer font.Close()

    w := app.NewWindow(image.Rect(0, 0, 480, 240), color.RGBA{240, 240, 240, 255})
    defer w.Drop()

    w.Text("Hello, world!", font, image.Pt(200, 100), color.RGBA{0, 0, 0, 255})
    w.Line(image.Pt(200, 120), image.Pt(300, 120), color.RGBA{255, 0, 0, 255})
    w.Show()
    app.Sync()

    for {
        action := <-app.Chan()
        if action == event.DestroyEvent || action == event.KeyExit {
            break
        }
    }
}

To run :

git clone https://github.com/codeation/canvas.git
cd canvas
cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .
GOOS=js GOARCH=wasm go build -o main.wasm ./cmd/
go run ./examples/wasm

To see results, open http://localhost:8080/ in you browser. Please, try with Brave or Chrome browser.

Project State

Notes

The performance of the browser will not be enough for the regular use.
This project is still in the early stages of development and is not yet in a usable state.
The project tested on Debian 12.0 with Brave browser (Version 1.52.126 Chromium: 114.0.5735.133).