Seeing as this uses non public APIs, i would STRONGLY recommend not using it in any shipping applications. However, for interests sake alone this is how DVD Player appears to do it.
https://github.com/heardrwt/RHAdditions/blob/master/RHAdditions/NSWindow%2BRHPreventCaptureAdditions.m -Richard On 06/03/2013, at 11:41:16 PM, Scott Ribe <scott_r...@elevated-dev.com> wrote: > > On Mar 7, 2013, at 12:23 AM, Jens Alfke wrote: > >> On Mar 6, 2013, at 5:56 PM, Charles Srstka <cocoa...@charlessoft.com> wrote: >> >>> Instead, I'd try to figure out what Apple's DVD player does; it allows you >>> to take screenshots all day long, but the copyrighted content gets replaced >>> by a solid color. >> >> >> If that’s true (I’ve never tried it) then my suspicion is that this is a >> side effect of the way the DVD decoding is done — the codec is >> hardware-based and may be passing the decoded pixels through a separate >> pipeline where they get composited into the video output late in the game, >> i.e. the DRM’d pixels never appear in the GPU’s main frame buffer. If so >> (and I’m really just making an educated guess) then that technique wouldn’t >> be applicable to other apps. > > Nope, FYI, it is not a side effect--it is deliberate and it is required by > the licensing terms for DVD playback. It is also apparently easy to > circumvent. > > -- > Scott Ribe > scott_r...@elevated-dev.com > http://www.elevated-dev.com/ > (303) 722-0567 voice > > > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/heardrwt%40gmail.com > > This email sent to heard...@gmail.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
