Render a QML scene into a texture and save it

[stereoMatching]

How could I translate the QML scene(like Rectangle, Image etc) into a texture and save it?
Anyone tried this before?If I can translate the components to texture, then I should be able to save
the image after processing by particle systems or shaderEffects

[stereoMatching]

Example:

Rectangle{
      id:root
 
      widht:640
      height: 480
 
      ToTexture{ id: toTexture} //a new type created by c++
 
      MouseArea{
 
         anchors.fill: parent
 
         onClicked: {        
             toTexture.saveAsTexture(root) //this function will transfer the root item to texture and save it into QImage
         }
      }
    }

Rectangle{
      id:root
     
      widht:640
      height: 480
     
      ToTexture{ id: toTexture} //a new type created by c++
     
      MouseArea{
     
         anchors.fill: parent
     
         onClicked: {        
             toTexture.saveAsTexture(root) //this function will transfer the root item to texture and save it into QImage
         }
      }
    }

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The problem is, how could I design a new type like “ToTexture”? The example of “ Scene Graph – OpenGL Under QML.” show us how to render a qml scene, but I can’t find an example show us how to transfer the qml scene to a texture.

[stereoMatching]

I found a way to do it

http://www.qtcentre.org/threads/5496...eenShot-Qt-QML

We could take the screenshot, then render the QImage to texture