Microsoft Technology Licensing, LLC

David Liping Xu

Kirk O Olynyk

Gilman Kuey Wong

Hock San Lee

Ori Gershony

James Andrew Alan Goossen

Lingyun Wang

A user mode device driver interface (UMDDI) is disclosed. The UMDDI is preferably implemented in Windows&#xae; NT&#xae; version 5.0 and similar systems. The UMDDI allows a device driver to execute in user-mode while the graphics engine (GRE) remains in kernel-mode. The UMDDI exists as a layer between the user-mode driver and GRE; from the perspective of GRE, it encapsulates the user-mode driver and makes it appear to be a normal kernel-mode driver. The UMDDI layer handles the kernel-to-user and user-to-kernel transitions, parameter validation, and management of the kernel-mode and user-mode data and objects.

User mode device driver interface

An improved image data processing architecture utilizes a negotiation protocol with an information push technique to provide a more efficient and effective image data rendering pipeline. The improved image data processing architecture allows the optimization of data transfer through the use of image transfer parameters and flags. In another aspect of the invention, a selection mechanism is provided to allow a client application to easily select an image frame as the current frame in a multi-dimensional image. Image sinks within the invention may further support non-blocking behavior.

Negotiated image data push processing

User mode device driver interface for translating source code from the user mode device driver to be executed in the kernel mode or user mode

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Redmond, WA, United States of America

David Liping Xu