Abstract: Described are systems and methods for loading mirror drivers in remote sessions of a remote server that enables remote sessions at various computing or client devices to access the mirror drivers. The mirror drivers are video display drivers which receives video rendering output and/or graphics output from a graphics device interface. Such video rendering output and/or graphics output received may be a mirror image of the video rendering output and/or graphics output send to display drivers for displaying on monitor.

Abstract: Described is a filtering mechanism/process that selectively controls whether graphics primitives are provided to a given driver. For example, graphics primitives of an accessibility (e.g., magnification) program may be excluded from being obtained by mirror drivers associated with the accessibility programs, so that the mirror drivers receive only the primitives of unmagnified windows. A registration mechanism allows a program to identify its window as being associated with a class of drivers for filtering, and the drivers may identify themselves as being of the class. By maintaining data that associates windows with a class of drivers, when graphics primitives associated with a registered window are received, a filtering operation be activated to determine which graphics primitives are provided to which driver or drivers. Filtering may be by exclusion to prevent certain primitives from being obtained by excluded drivers, or by inclusion whereby only included drivers receive certain primitives.

Abstract: Described is a technology including a mechanism a mechanism that when activated, detects a call to a device independent bitmap. An appropriate mirror driver, such as one or more registered as an accessibility driver, may then be notified of the call. The mechanism may be activated upon creation or selection of the device independent bitmap, and may comprise a wrapper/driver that, from the perspective of the mirror driver, simulates a call to a device dependent bitmap. The notification may be performed by having the driver communicate a function call that emulates a drawing primitive to the mirror driver.

Abstract: Described is the selective exclusion of content returned in a requested screen capture operation, wherein exclusion may be determined by a window category and the requesting application program. For example, a magnification program will not received content captured from its own layered window or from any other layered magnification windows. A registration mechanism obtains and maintains a window handle for any window registered for exclusion. A screen capture mechanism uses the information to determine whether to exclude the content of windows when returning the captured screen content. Exclusion may be accomplished by enumerating areas that are not covered by any layered window and copying those areas to a screen representation buffer or the like, and separately enumerating areas that are covered by at least one layered window. A covered area is only copied to the screen representation when it does not correspond to an excluded window.

Abstract: Described are mechanisms and techniques for providing interoperability between two different graphics technologies. An application includes windows of two types, a legacy type and a new type. A graphics system includes components that support each of the two types. Interoperability is achieved by creating legacy structures associated with any windows of the new type. A mapping is created that associates the legacy structures with the windows of the new type. Rendering of legacy windows is performed by a first graphics technology, and rendering of new windows is performed by a second graphics technology. The distinction between the two types of windows is noted by the existence of the legacy structures.

Abstract: The visual output of legacy child windows intended for display on a non-legacy parent are redirected to an off-screen bitmap buffer. A display component having enhanced visual functionality processes the output of the legacy child window with any of a number of visual effects. The display component composes the parent window by combining the non-legacy visual output with the processed output of the legacy child window. In this way, visual enhancements that have been technologically unavailable to the legacy child windows may be applied to the legacy child windows when used in combination with a new-technology parent window.