Group

The group component will mark a subtree as static content whose render data needs to be stored on the GPU and reused every frame.

This needs support from:

• Render redirection. Render redirection or the Picture API allows for render commands to be captured and replayed. It will probably be an API similar to Framebuffer/Canvas, but instead of rendering, the drawing commands are send as vertex/index buffer data to a Picture which stores it on the GPU. Drawing the Picture just renders the data already prepared in the GPU.
• Group component. Marking a node and everything under it as a group. Also holds the prepared picture.
• Internal treewalk draw function. This function currently redirects drawing to Framebuffer and Mask. It needs to be adapted to redirect to a Picture.