Thursday, April 2, 2015

Screen Capture






Screen capture
    

  1. SurfaceControl.screenshot(dw, dh, minLayer, maxLayer) (WindowManagerService.java)
    2. 

  2. public static Bitmap screenshot (SurfaceControl.java)
    

    3. 

  3. static jobject nativeScreenshotBitmap (android_view_SurfaceControl.cpp)
    

    4. 

  4. pixels->update 
    

    5. 

  5. mScreenshot.update
    

    6. 

  6. ScreenshotClient::update (SurfaceComposerClient.cpp)
    

    7. 

  7. virtual status_t captureScreen (ISurfaceComposer.cpp)
    

    8. 

  8. remote()->transact
    

    9. 



PS 1  Create outServerChannel and outClientChannel. 


      Each channel has 2 channel objects.
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