+- PINE64 (https://forum.pine64.org)
+-- Forum: PinePhone (https://forum.pine64.org/forumdisplay.php?fid=120)
+--- Forum: PinePhone Software (https://forum.pine64.org/forumdisplay.php?fid=121)
+--- Thread: Article: Inside a Smartphone Accelerometer: PinePhone with NuttX RTOS (/showthread.php?tid=18236)
RE: Article: Inside a Smartphone Accelerometer: PinePhone with NuttX RTOS - lupyuen - 05-25-2023
Haha no worries @WhiteHexagon , I'm now working on something really interesting: Simulate PinePhone UI with Zig, LVGL and WebAssembly :-)
RE: Article: Inside a Smartphone Accelerometer: PinePhone with NuttX RTOS - WhiteHexagon - 05-26-2023
Nice! @lupyuen btw when you are missing functions in Zig/WASM it is often easier to make a call into the javascript world, unless you are on a performance critical path. For my wasm stuff I also keep the render loop on the JS side using requestAnimationFrame but with a custom callback into Zig (once per frame) passing over a frame number, timestamp and canvas2d context.
roughly:
Code:
WebAssembly.instantiateStreaming(fetch('app.wasm'),{env}).then(wa=>{
zex=wa.instance.exports;
zmb=zex.memory.buffer;
zex.run();
let fn=0; //frame number
function frame(ts) {
zex.drawFrame(ctx,fn,timestamp);
fn++;
globalThis.requestAnimationFrame(frame);
}
globalThis.requestAnimationFrame(frame);
})RE: Article: Inside a Smartphone Accelerometer: PinePhone with NuttX RTOS - lupyuen - 05-28-2023
Thanks @WhiteHexagon for the tips, we now have LVGL rendering OK in the Web Browser, compiled with Zig yay! :-)
LVGL renders OK in WebAssembly with Zig Compiler