{"action":"created","issue":{"url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/911","labels_url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/911/labels{/name}","comments_url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/911/comments","events_url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/911/events","html_url":"https://github.com/KhronosGroup/WebGL/issues/911","id":63829206,"number":911,"title":"\"packed\" layout qualifier is non-portable","user":{"login":"kenrussell","id":1149904,"avatar_url":"https://avatars.githubusercontent.com/u/1149904?v=3","gravatar_id":"","url":"https://api.github.com/users/kenrussell","html_url":"https://github.com/kenrussell","followers_url":"https://api.github.com/users/kenrussell/followers","following_url":"https://api.github.com/users/kenrussell/following{/other_user}","gists_url":"https://api.github.com/users/kenrussell/gists{/gist_id}","starred_url":"https://api.github.com/users/kenrussell/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kenrussell/subscriptions","organizations_url":"https://api.github.com/users/kenrussell/orgs","repos_url":"https://api.github.com/users/kenrussell/repos","events_url":"https://api.github.com/users/kenrussell/events{/privacy}","received_events_url":"https://api.github.com/users/kenrussell/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-03-23T20:50:52Z","updated_at":"2015-10-25T05:37:53Z","closed_at":"2015-10-25T05:37:53Z","body":"As discussed in WebGL face-to-face meetings some time ago and with the OpenGL ES working group, the \"packed\" layout qualifier is non-portable. It would be possible for an application to define a binary format for its uniform buffer objects which bakes in the offsets queried on one GPU; this data would then not load properly on another GPU.\r\n\r\nThe resolution some time ago was to remove the \"packed\" layout qualifier from the WebGL 2.0 spec; this should be done and marked as a difference compared to ES 3.0. (std140 was confirmed at the time to be portable and no GPU vendor had an objection to using it everywhere.)"},"comment":{"url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/comments/150894164","html_url":"https://github.com/KhronosGroup/WebGL/issues/911#issuecomment-150894164","issue_url":"https://api.github.com/repos/KhronosGroup/WebGL/issues/911","id":150894164,"user":{"login":"kenrussell","id":1149904,"avatar_url":"https://avatars.githubusercontent.com/u/1149904?v=3","gravatar_id":"","url":"https://api.github.com/users/kenrussell","html_url":"https://github.com/kenrussell","followers_url":"https://api.github.com/users/kenrussell/followers","following_url":"https://api.github.com/users/kenrussell/following{/other_user}","gists_url":"https://api.github.com/users/kenrussell/gists{/gist_id}","starred_url":"https://api.github.com/users/kenrussell/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kenrussell/subscriptions","organizations_url":"https://api.github.com/users/kenrussell/orgs","repos_url":"https://api.github.com/users/kenrussell/repos","events_url":"https://api.github.com/users/kenrussell/events{/privacy}","received_events_url":"https://api.github.com/users/kenrussell/received_events","type":"User","site_admin":false},"created_at":"2015-10-25T05:37:53Z","updated_at":"2015-10-25T05:37:53Z","body":"This was fixed by #1278 -- I forgot that this issue had been filed. Closing.\r\n"}}