Emscripten port

LittlevGL ported to Emscripten to be converted to JavaScript

The result looks like this https://lvgl.io/demos

How to get started

Install Emscripten SDK

Download the Emscripten SDK and make sure it is in your PATH.

1. git clone https://github.com/emscripten-core/emsdk.git
2. cd <path-to-emsdk>
3. git pull
4. ./emsdk install latest
5. ./emsdk activate latest
6. source ./emsdk_env.sh

More info here: https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html

build jerryscript lib using emscripten

# jerryscript root directory
emcmake cmake -Bbuild -DJERRY_DEBUGGER=ON -DJERRY_LINE_INFO=ON  -DJERRY_CPOINTER_32_BIT=ON -DJERRY_GLOBAL_HEAP_SIZE=102400 -DJERRY_SYSTEM_ALLOCATOR=ON -DJERRY_ERROR_MESSAGES=ON -DJERRY_MEM_STATS=ON -DJERRY_LOGGING=ON
emmake make -C build

Get the Emscripten-LittlevGL project

1. Be sure you ran . <path-to-emsdk>/emsdk_env.sh to add EMSDK to PATH
2. In any directoy: git clone --recursive https://github.com/littlevgl/emscripten.git
3. cd <path-to-emscripten>
4. mkdir cmbuild
5. cd cmbuild
6. emcmake cmake ..
7. emmake make -j4
8. A file called index.html will be generated. Run this in your browser.

Build options (environment variables)

• LVGL_CHOSEN_DEMO can be set to the desired demo name so that you don't need to change any C files. This is useful to compile many demos in bulk using a script.

Example emcmake cmake .. -DLVGL_CHOSEN_DEMO=lv_demo_widgets

Known issue with Google Chrome browser

Chrome can't open the generated html file offline. It works if you copy the files to a server. Use Firefox or other browser for offline testing.

Known issue with Firefox

Firefox can't open the generated html file offline unless you go to about:config and change privacy.file_unique_origin to false.