[Solved]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

Looks like shaderEffectSource could render the qml scene to texture, but it do not provide a way for us to access the texture or save it, do anyone know where are the plug in source codes of the shaderEffectSource?

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)
 }

}
}
@

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.

Without this function, I can't save the graph generated QtQuick

stereomatching

I found the other example

"take screenshot":http://qt-project.org/forums/viewthread/28822/

Take the screenshot by QQuickView, then do what we want