Add WebGL Support

Hello,

I spent all day experimenting and got WebGL working with headless shell. See the thumbnails here: https://www.reddit.com/r/pplay/ - they are rendered by lambda function from webgl scene.

To enable WebGL:

1. I built osmesa using this script: https://github.com/devernay/osmesa-install . I changed disable_shared to enable_shared (line 534) to create libOSMesa32.so file). On EC2 instance, then final file was called libMangledOSMesa32 - just copy it next to the headless chrome binary as libosmesa.so.
2. Remove disable-gpu flag, and tweak serverless-plugin-chrome, so that libosmesa.so is included into distribution.

PS: I don’t remember whether I used headless_shell from this repository.It might be from https://github.com/universalbasket/aws-lambda-chrome But still - the WebGL in AWS lambda is possible, and I’m very happy to share it 😃.

[rthomps7]

@vsantosu

I was hoping you still had that build somewhere. @mvoropaiev pointed out the link doesn’t work.

I tried what @anvaka suggested without any luck. I have a zip with both headless_shell and libosmesa.so in there. The headless_shell works, but things fail with webgl.

Here are my CLI args:

args: [
              '--use-gl=osmesa',
              '--enable-webgl',
              '--hide-scrollbars',
              '--mute-audio',
              '--no-sandbox',
              '--single-process',
              '--disable-breakpad',
              '--ignore-gpu-blacklist',
              '--homedir=/tmp',
              '--data-path=/tmp/data-path',
              '--disk-cache-dir=/tmp/cache-dir'
]

I’m actually firing this up with Puppeteer. The same command works locally, but I get errors on the lambda. My lambda works fine for non-webgl stuff.

[whyvez]

Has anyone had experience using swiftshader instead of mesa when no GPU available?