Some interactivity does not work in Fixed Layout EPUBs

[rkwright]

It appears that some interactivity is not working on SDKLauncher-OSX following the recent merging of support for the new HTML Injection. Audio and video and Scripting work fine in the EPUB TestSuite (which are reflowable EPUBs), but do not work in the SmokeTestFXL, which is FIXED layout.

The same file (SmokeTestFXL) works fine in the Chrome Extension.
The SmokeTestFXL EPUB is here:
https://readiumfoundation.box.com/s/lv024fngot7eg3unnw50

[danielweck]

I don't think this has anything to do with recent changes, but I will rollback the codebase to double-check.

This appears to be a similar issue to readium/readium-shared-js#54 : in some circumstances ; e.g. CSS with GPU hardware acceleration, in UIWebView or WebKit + CSS-columns ; any started video (rendering surface) prevents controls from being interacted with mouse control.

My tests:

1. HTML5 audio and video work fine using the cloud reader on Safari OSX (development mode, via the default "grunt" task, i.e. Node Express local HTTP server)

2. HTML5 audio works fine in LauncherOSX (UIWebView), but sometimes fails to interact (typically when a video was recently started). Video nearly always fail to interact.

[danielweck]

@rkwright I can confirm that this "bug" (well, more like a UIWebView / WebKit issue) existed prior to the recent "HTML injection" changes. I rolled-back the codebase to ee3801b and was able to reproduce the annoying "unresponsive HTML5 video controls" behaviour.
Very frustrating problem!

[danielweck]

PS: note that I am on Yosemite, running the latest Safari. I cannot remember for sure whether video was working correctly in this fixed-layout EPUB under Maverick OSX.

[danielweck]

Yep, disabling enableGPUHardwareAccelerationCSS3D in ReadiumSDK.Models.ViewerSettings restores interactivity with video controls, but breaks image rendering in other fixed-layout EPUBs (in UIWebView, not browser WebKit)...investigating...
(damn browser rendering quirks!)

[danielweck]

Fixed in Pull Request readium/readium-shared-js#132