Question 1

How do I control the frame rate in go-canvas?

Accepted Answer

Use the maxFPS parameter in the start function to throttle redraws; the library automatically limits requestAnimationFrame callbacks to this rate, though actual performance depends on render time and browser scheduling.

Question 2

Is go-canvas faster than using JavaScript directly for canvas drawing?

Accepted Answer

Not necessarily; while it offers compile-time safety and adaptive rendering, the shadow buffer copy and single-threaded nature can introduce overhead, making direct JavaScript more efficient for simple or high-performance graphics.

Question 3

How can I handle mouse events with go-canvas?

Accepted Answer

Currently, go-canvas focuses on drawing and lacks built-in event handling; you'd need to implement JavaScript interop separately for mouse interactions, as mentioned in the future plans for traps and helper functions.

Question 4

Can I use go-canvas for 3D graphics or WebGL?

Accepted Answer

No, go-canvas is designed for 2D drawing using the draw2d library and HTML5 Canvas 2D context; for 3D graphics, you'd need WebGL or other specialized libraries with JavaScript interop.

Question 5

What's the performance impact of the shadow image buffer?

Accepted Answer

The shadow buffer allows independent updates but requires copying to the browser canvas each frame, adding overhead; for static images, adaptive rendering helps, but for dynamic content, it may limit frame rates.

Question 6

go-canvas vs standard WebAssembly canvas approaches: which is better?

Accepted Answer

go-canvas excels in compile-time safety and Go-centric development, avoiding JS interop, but standard approaches using syscall/js might offer more direct control and potentially better performance for complex integrations with JavaScript ecosystems.

Question 7

How to compile and deploy a go-canvas application?

Accepted Answer

Compile with GOOS=js GOARCH=wasm go build -o main.wasm, then serve with a web server like Caddy (included in demo) to handle WASM MIME types; the README provides a demo setup for local testing.

go-canvas

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