Method used for showing intercepted and captured change data and based on multiple surfaces

Abstract

The invention provides a method used for showing intercepted and captured change data and based on multiple surfaces. The method comprises the steps of establishing multiple virtual display devices in a system by a virtual display device video small interface drive program, dynamically switching physical display devices to the virtual display devices, then intercepting and capturing graphic device interface (GDI) data in GDIs of the virtual display device drive program, and intercepting and capturing DirectX data on device surface of the virtual display device drive program. According to the method, data of a changing portion of a computer screen is only obtained and the quantity of the data is effectively reduced. Due to establishment of the multiple display devices, a condition with multi-display is supported. Due to support to the multiple surfaces, the method effectively improves properties of the system compared with other intercepting and capturing method. Interception and capture of the GDI data and the DirectX data can be simultaneously finished in the virtual device display drive program, and the intercepted and captured data are complete and efficient. The virtual display devices can well achieve the safety of the intercepted and captured data.

Description

technical field [0001] The invention relates to the technical field of computer communication equipment, in particular to a method for displaying intercepted change data based on multiple surfaces. Background technique [0002] In the prior art, the computer system includes a computer screen display data module, a graphics device interface engine / multimedia programming interface module, a physical display device driver, a physical display device video port driver, and a computer screen; please refer to figure 1 , the computer screen display data module: receives the data that will be displayed on the computer screen generated by computer interaction or other methods; the graphics device interface engine / multimedia programming interface module (GDI Engine / DirectX module): is a computer Windows operation A part of the system is responsible for calling the driver program provided by the third party to transfer the display data to the third party driver program; the physical dis...

AI Technical Summary

Problems solved by technology

[0004] 1. In the user state, the screen data is obtained by regularly taking screenshots of the entire computer screen. In this way, the obtained data is the entire computer screen, but the change of the computer screen is often only a part of the screen, so the amount of data obtained will be huge. Not conducive to storage and transmission

[0005] 2. Hook each application program in the system in the user state to intercept the changing part of the application program on the computer screen. This method needs to be linked to each application program, so it is very complicated to implement, and computer graphics The system has a large amount of data. This method will occupy a large amount of system resources and slow down the operation of the entire system.

[0006] 3. Use the Mirror (mirror) driver recommended by Windows to obtain display data. This method does not support DirectX applications, so DirectX data cannot be obtained. In this method, the data that has not changed will continue to be sent to the original graphics card Above, continue to display on the desktop, some applications such as remote desktop access will cause security problems

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