High resolution alphanumeric character generation

Details High resolution alphanumeric character generation High resolution alphanumeric character generation

1998-06-03

2000-10-17

Hong, Stephen S.

Data processing: database and file management or data structures

Database design

Data structure types

707527, 707531, 345467, 345468, 345469, 345470, 345471, 345472, G01D 942, G06K 1500

Patent

active

061345679

ABSTRACT:
A printer device driver system includes a relatively simplistic kernel mode device driver, KM.sub.-- DRIVER. KM.sub.-- DRIVER supplies limited functionality for basic Device Driver Interface, DDI, operations compatible with O/S kernel mode components. Separate reporting of graphics objects data and text data is made. The device driver is now divided into: a kernel mode analysis segment KM.sub.-- TEXT and a user mode text resolution generator UM.sub.-- TEXT segment. A user mode driver, UM.sub.-- DRIVER, is provided for receiving DDI coded instructions. In essence, UM.sub.-- TEXT subroutine ignores reported resolution and renders text in any resolution up to and including the highest possible resolution for the printer apparatus provided. A set of text data output from the application and O/S is reported to KM.sub.-- DRIVER in a fixed resolution. Text data is received with DDI text print requests. When a font is not recreatable, rendering is performed at the fixed resolution and output to the printer. When a font is recreatable, and the printer is capable of a rendering resolution greater than the reported resolution, the USER.sub.-- MODE is used to obtain a higher resolution rendering. DDI parameters are forwarded to UM.sub.-- TEXT subroutine. A memory construct is established. Next, a render resolution font is simulated by reverse mapping DDI parameters into a form suited to enhancement. Using the simulated font, a transformation from reported resolution to the higher density render resolution is applied. Render resolution formatted text is sent to the memory construct is substituted for reported resolution text and output to the printer.

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