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Screen acquiring method based on WDDM and computer system with multiple displays

An acquisition method and display adapter technology, which are applied in computing, digital output to display devices, instruments, etc., can solve problems such as unsuitable operating systems, remote user experience discounts, display terminals that cannot display display images, etc., to achieve the same image quality, achieve simple effects

Active Publication Date: 2009-06-24
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the desktop acquisition of Vista. If you want to make the acquired desktop image support the Aero effect, you need to intercept the display image data processed by the display adapter. However, the display image data in Vista is encrypted data, and it is not a designated display terminal. Could not display these display images
However, if the data before processing by the display adapter is directly intercepted, the Aero effect will not be supported, and the remote user experience will be greatly reduced
The screen image acquisition technology in the prior art is not suitable for operating system Vista

Method used

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  • Screen acquiring method based on WDDM and computer system with multiple displays
  • Screen acquiring method based on WDDM and computer system with multiple displays

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 1 It is a flow chart of the screen acquisition method based on WDDM of the present invention, such as figure 1 As shown, the screen acquisition method based on WDDM of the present invention comprises:

[0027] Step 101: Load a filter driver between the display adapter and the image display processing engine. Here, the image display processing engine can serve the kernel of the operating system, and the display adapter is a combination of software and hardware capable of display image processing, such as a display card and its driver.

[0028] First load the filter driver, so that the filter driver takes over the registration interface of the kernel service Dxgkrnl.sys in the operating system. The kernel service Dxgkrnl.sys is a system file for the operating system to complete image display management, and it participates in all image generation and m...

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Abstract

The invention discloses a screen acquiring method on the basis of WDDM, relates to a screen acquiring technology, and aims to solve the problem that the prior art is not applicable to Vista. The adopted technical scheme is as follows: an image display processing engine outputs a display image drawing instruction; a filter driver analyzes the display image drawing instruction, and determines whether a display adapter can execute the display image drawing instruction according to the registered ability of the display adapter; when the display adapter can execute the display image drawing instruction, the display image drawing instruction is transferred to the display adapter; the display adapter generates the display image data according to the display image drawing instruction and transfers the display image data back to the filter driver; and the filter driver caches the display image data. The invention further discloses a computer system provided with a plurality of displays and utilizing the screen acquiring method. The invention can be realized simply, and the intercepted screen display image quality is as same as that of the local display terminal.

Description

technical field [0001] The invention relates to screen acquisition technology, in particular to a WDDM-based screen acquisition method based on Vista Display Driver Model (WDDM, Windows Vista Display Driver Model) and a computer system with multiple displays. Background technique [0002] With the development of network technology, there are more and more applications for desktop sharing, remote monitoring and maintenance by intercepting computer desktop images and compressing them for display on other computers, remote terminals or remote display devices (such as network projectors). Taking the XP operating system desktop image acquisition in the NT technology as an example, the prior art is to load the XP display driver model (XDDM, XP Display Driver Model) filter / image display driver, such as mirror mirror or device driver interface DDI, real-time mapping Like each update of the current display screen, then the imaged data is compressed and recorded in the form of paralle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/14
CPCG06F3/1431
Inventor 孙成昆李洪伟周飞焦悦光
Owner LENOVO (BEIJING) LTD