Invention Grant
US08149430B2 Dual-head or hybrid print driver supporting XPS and GDI print paths without performing data conversion between XPS to EMF or vice versa 有权
支持XPS和GDI打印路径的双头或混合打印驱动程序,而不执行XPS到EMF之间的数据转换,反之亦然

Dual-head or hybrid print driver supporting XPS and GDI print paths without performing data conversion between XPS to EMF or vice versa
Abstract:
A method is provided for improving printing performance of a print job from a Graphics Device Interface (GDI) based Windows® application submitted to an XPSDrv printer driver which is utilized by a filter pipeline service, wherein a required conversion from an existing GDI/device driver interface (DDI) to an XML Paper Specification (XPS) performed by a GDI-to-XPS conversion unit is eliminated to reduce latency. The method includes replacing the GDI-to-XPS conversion unit with a printer graphics driver which converts DDI calls into raw spool data; and adding a dual head filter as a first filter to the filter pipeline service to handle the raw spool data generated from the printer graphics driver.
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