How do I emulate WebGL stuff with OESMesa on AWS Lambda?
Yes it is possible!
You need the right combination of:
- headless-chromium binary
- libosmesa.os binary (in same directory)
- launch chrome headless with the right flags, such as (see link for full details):
['--use-gl=osmesa', '--enable-webgl', '--ignore-gpu-blacklist', '--homedir=/tmp', '--single-process', '--data-path=/tmp/data-path', '--disk-cache-dir=/tmp/cache-dir']
This thread on the serverless-chrome github project discusses the issue and provides some binaries which I have used to capture screenshots of WebGL content on AWS Lambda using Page.captureScreenshot().
https://github.com/adieuadieu/serverless-chrome/issues/108#issuecomment-416494572
(See comment by @apalchys on 28th August)
This particular example uses SwiftShader which seems to be the preferred option going forward.
Note, however, that I was unable to create PDFs using Page.printToPDF() using this version - WebGL content just appears blank/white. However, I was able to also get Page.printToPDF() using an earlier version which uses osmesa, see https://github.com/adieuadieu/serverless-chrome/issues/108#issuecomment-371199530