Cross-platform performant Screen capture tool c++

I am creating a remote desktop tool in Java. One major problem of this approach is the performance of the java method createScreenCapture in the class Robot. There is a alternative with the SunToolkit that uses the class Robot peer. On Linux and Windows7 and windows vista, a screenshot may take up to 250 to 400 milliseconds, only allowing 2 to 4 screenshots per seconds. Mac and windows xp seem not to be affected. Therefore I want to invite you to create a C++ application that will be integrated by JNI into Java. Right now 2 components are needed - one for linux (hopefully using methods that are available in all distributions or support them in a download package) and one for windows7/windows6. The components need to be delivered as msi and install package for linux (mechanism to discuss). The component allows to take screen captures with a performance of at least 40 to 50 milliseconds per screen capture on a screen resolution of 1650x1080 on the problematic OS mentioned above. ## Deliverables The two components needs to work in a multi screen environment. the component exposes only one method, that does the capture. As parameter it takes: - x and y for upper left corner of screen capture - width and height - quality of the screen capture (resolution, colors, etc). As return type the method allows to use a [login to view URL] Class in Java. The source will be on my company TFS Server. The work will be done in eclipse (with c++ plugin) and be sourced controlled by Teamprise eclipse plugin (I will deliver a license for the project duration).