dart2js transpiled WebGL2 code works in dartium but not in chrome (ddc is other way round)

[robertmuth]

First off, Dartium 45 supports WebGL2 when configured properly.
To activate WebGL2 support launch dartium with "--enable-unsafe-es3-apis"
you may also need to enable the following under chrome://flags :

• Override software rendering list
• Enable WebGL Draft Extensions

You can make sure that webgl2 is working in dartium at http://webglreport.com/?v=2

The problem can be reproduce with the webgl2 branch of the chronosgl library: https://github.com/ChronosTeam/ChronosGL/tree/webgl2

First try the straight up dart example/simple/simple.html in dartium - this should work

Next transpile the example with dart2js
make simple_example
which will print a url to try
that url works with dartium 45 but not on any current chrome version

Next transpile the example with ddc
make -f Makefile.lib simple_example
which will also print a url to try
that url works on recent chrome but not dartium 45

[sigmundch]

/cc @alan-knight @vsmenon

Could this be a result of a mismatch between IDL files? Dart2js's dart:html implementation is generated from the IDL files of chromium-45, so this mismatch could cause the program to fail in the current chrome. DDC might be using a different dart:html library, but I'm not sure.

[vsmenon]

@terrylucas is looking at WebGL2

DDC output won't run on Chrome 45 (e.g., Dartium) in general - it targets ES6 features that require Chrome 47/48 or later.

DDC and Dart2JS should be using roughly the same dart:html.

[terrylucas]

Robert has a private version of Dartium 50 that works with the WebGL2 that's exposed in Chromium 50. As I roll Dartium 50 to Dart2JS I/Robert can check on chronosgl working. The DDC part is certainly later...

…

On Mon, Apr 17, 2017 at 6:32 PM, vsmenon ***@***.***> wrote: @terrylucas <https://github.com/terrylucas> is looking at WebGL2 DDC output won't run on Chrome 45 (e.g., Dartium) in general - it targets ES6 features that require Chrome 47/48 or later. They should be using roughly the same dart:html. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#29308 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AB9ewfosk6I3bAYAjBvYSv8tHk266gAoks5rxBKigaJpZM4M3ufV> .

[robertmuth]

The private version of Dartium 50 now works with all example/* from
https://github.com/ChronosTeam/ChronosGL/tree/webgl2

DDC transpiled code for example/simple works in both Chrome 57 and Dartium 50.

No change on the dart2js side. The transpiled code for example/simple does NOT run in Chrome 57.

[jwt-sgg]

When will an updated Dartium be made available for everyone?

[terrylucas]

Soon, we are still fixing bugs / adjusting to changes that occurred between Chromium 45 and Chromium 50. I would anticipate a new Dartium and dart:html (et. al libraries) for dart2js with the release of Dart 1.24 Terry.

…

On Thu, Apr 20, 2017 at 7:58 PM, jwt-sgg ***@***.***> wrote: When will an updated Dartium be made available for everyone? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#29308 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AB9ewQLjUi0zj-v_I81XKyew13HXKnofks5ryBtngaJpZM4M3ufV> .

[terrylucas]

Fixed for Dartium, dart2js and DDC.