Noah Petherbridge
c5c85330de
* Refactor the event system in the WASM render engine to serialize the async JavaScript events into a channel, so that queued events are read off serially in the main loop similar to SDL. This fixes keyboard input issues, altho if you type really fast some input keys get lost. |
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|---|---|---|
| .. | ||
| index.html | ||
| main_wasm.go | ||
| Makefile | ||
| README.md | ||
| server.go | ||
| wasm_exec.js | ||
WebAssembly Port
Build and Test
Change to the wasm/ folder and type make to build doodle.wasm
To test it with a local Go server, cd to the wasm/ folder and run
go run server.go and visit http://localhost:8080/
Copy the fonts and assets folders from the project root to the
wasm/ directory so they're available over HTTP.
wasm_exec.js
To update the wasm_exec.js to match your version of Go:
# Fedora: install golang-misc
sudo dnf install golang-misc
# Copy the wasm_exec.js
cp $(go env GOROOT)/misc/wasm/wasm_exec.js ./
Font Support
Fonts are implemented as CSS embedded fonts configured in
wasm/index.html
The font family name should match the filename, sans .ttf extension, for example "DejaVuSans-Bold". Doodle's internal logic converts a FontFilename string like "./fonts/DejaVuSans.ttf" into the base name to use as the font family. It also has fallbacks for sans-serif and serif in case of any problems.
Known Bugs and Limitations
- github.com/kirsle/golog
- The detection of an interactive terminal is broken in WASM.
terminal.IsTerminal(int(os.Stdout.Fd()))- As a workaround, comment it out and hardcode to
false
- Userdir
- For WASM we'll want to use localStorage to store user drawings instead of the userdir.
- Wallpaper support
- WASM can't use os.Open to read the wallpaper image, so will need another method to load the image.
- Texture caching support isn't implemented yet to hold the four corner textures of a wallpaper.
- As a workaround, added a
wallpaper.readyboolean and relevant functions exit early for WASM so wallpapers don't render at all.