ruby on rails - Is it possible to use RMagick to draw overlays on to other application windows? -

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i building desktop app put simple graphical hud on other application windows. need app able access app parent, , build out hud on top of it. possible rmagick? if not, there else in ruby needed?

i need exploring options, since there seems little information related doing this. if involves fact have access specific c library or something, fine. i'm little lost on start.

edit: can comment on why getting no responses whatsoever? unique of requirement?

are trying create overlay on top of existing application window, similar xfire, raptr, steam, or fraps do? if doing on windows, , want overlay full screen directx apps such video or games, need hook directdraw. rather old library appears unsupported serve starting point: http://directdrawoverlaylib.codeplex.com/

if want overlay standard (not directx) app, might make app use borderless, transparent window on can paint content. then, track movement of "parent" window can move child window accordingly. here's example of using "layered window" feature in windows make transparent windows. http://msdn.microsoft.com/en-us/library/ms997507.aspx same on osx appropriate cocoa apis.

i don't think rmagick here, , need os specific you're going have dabble native code.


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