[webkit-qt] Probleme Qt5 Webkit direcfb Hardware acceleration

[MacBook Pro]

Hello

I work on qt5 webkit on a platform with directfb but i have no hardware acceleration when I load a Webpage 
i have seen the problem here https://bugs.webkit.org/show_bug.cgi?id=97548 but the revision is old and the patch doesn't work on the last version on qtwebkit  and the revision 122719(directfb support)  doesn't build with qt5 so, i don't know how activate Hardware acceleration for qt5webkit directfb.

if someone have an idea i will be happy

Merci