Qt, linux and everything

QtMultimedia for WebAssembly QtMultimedia for WebAssembly adds the ability for Qt based apps to use audio, camera and play videos in a web app.

One of the most tedious tasks a developer will do is debugging a nagging bug.

QtMultimedia in WebAssembly Since Qt 6.5.0, QtMultimedia has support for playing video in a QGraphicsVideoItem and QGraphicsScene, as well as recording from a camera.

Qt for WebAssembly on mobile devices, specifically phones, has lacked an essential feature - support for the native keyboard.

Clipboard use on the desktop platforms is ubiquitous.

QtMultimedia just got a new platform to run on - Qt for WebAssembly!

I sometimes get asked if there is a way to let a Qt app ask the user if they really want to close the app when the browser tab or window gets closed by the user.

In my last post Qt WebAssembly performance enhancement there were some impressive performance stat speedups.

SIMD is something related to performance stuff.

I am so happy right now!

ahhh well now.

Sometimes when I am building a larger project with Qt for WebAssembly, I get this type of message: wasm-ld: error: initial memory too small, 17553264 bytes needed and the build fails.

Debugging is often difficult in the best of times.

Qt on RaspberryPi is really easy, but can be rather time consuming to build an image to run on raspberry pi with Qt 5.

In the just released Qt 5.15-beta2 version, Qt for WebAssembly will require an Emscripten update from 1.38.27 to 1.39.8.

Admittedly, building Qt WebAssembly apps takes what seems like forever.

As some may know, I currently reside in Australia, which is undergoing an unprecedented bush fire season.

So I get a message regarding changes needed to Sensor Framework and QtSensors to add heart rate sensor support for AsteroidOS.

Qt for WebAssembly is an exciting new platform for Qt.

The guys working on Emscripten have begun integrating the new llvm wasm backend into mainstream emscripten.

I have built Qt and various apps using emscripten so many times over the last couple of years, it isn't even funny.

When porting applications to Qt for WebAssembly, there are a few issues to keep in mind.

At times it was a bit painful juggling writing a book, doing my day job and running around doing the things that life throws.

The project Qt 5 emscripten that Intopalo (who are doing tons of amazing stuff with some awesome talent) started as research for a client, has moved git repos.

So ya, I have been doing work for the up and coming Finnish company Intopalo getting Qt5 for WebAssembly using emscripten up and running.