Abstract: This application discloses a computing system configured to convert a virtual machine instruction set corresponding to a downloadable application into native code specific to the computing system. Prior to completion of the conversion of the virtual machine instruction set into native code specific to the computing system, the computing system can utilize a process virtual machine to execute the virtual machine instruction set to implement the downloadable application. After completion of the conversion of the virtual machine instruction set into native code specific to the computing system, the computing system can switch the execution of the virtual machine instruction set with the process virtual machine to execution of the native code by the computing system to implement the downloadable application.

Abstract: A method and computer system are described for generating compressed image data, and for rendering pixel data using the compressed image data. A plurality of hulls are defined in the image, each hull being defined as a set of polygons in a desired coordinate system. For at least some of said hulls, a portal is defined, each portal being defined as a set of point in the designated coordinate system for that hull. A viewing transform allows the portal to be mapped to another, target hull. A data structure is stored which holds the defined hulls and portals in a manner describing their physical relationship in the image. The data structure can be transmitted via a number of different mediums and represents the compressed image data which can be used to generate pixel data to generate an image at a remote location.