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Protecting method for frame buffer zone state

A frame buffer and buffer technology, applied in the field of protection of the frame buffer state under the Qt/Embedded system, can solve problems such as conflicts in display cards, shutdown of the Linux system, blurred screen of the main control program, etc., to avoid use conflicts and ensure Effects of Security, Broad Compatibility and Applicability

Inactive Publication Date: 2008-10-29
XUZHOU LIFANG MECHANICAL & ELECTRICAL EQUIP MFG CO LTD
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AI Technical Summary

Problems solved by technology

When this method is transplanted to the Qt / Embedded system for testing, because Qt / Embedded will also use the frame buffer, there will inevitably be conflicts during the display card test process, which will cause the currently running main control program to be blurred, and even serious. Cause the current Linux system to shut down

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  • Protecting method for frame buffer zone state
  • Protecting method for frame buffer zone state
  • Protecting method for frame buffer zone state

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Embodiment Construction

[0025] The features and embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] figure 1 It is an embodiment of the frame buffer state protection method of the present invention. As shown in the figure, first the virtual interrupt initialization (step 102), by carrying out the Linux system real mode initialization, to support the basic input / output system (BIOS) of the current computer display card to call INT 10H, wherein the basic input / output system (BIOS ) supports calling the Video Electronics Standards Association (VESA) subfunction whose function number is 4F04 in INT 10H. Then judge whether the above-mentioned Linux system real mode initialization is successful (step 104), if it fails, then end; otherwise advance to step 106, return to save / restore the required memory size of the frame buffer state of the current system. In the process of returning the required memory size of the frame buffer state, the...

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Abstract

This invention relates to one frame buffer status protection method, which comprises the following steps: initiating the system mode to support current computer display card basic input output interval transfer and when BIOS supports electron VESA 4F04. it goes back to the current system frame buffer area status memory size to store buffer status; processing the buffer status for reading operation and restoring test buffer area after test; otherwise, after testing activating the display mode according to current system buffer area to Linux nuclear.

Description

technical field [0001] The invention relates to a safety protection method compatible with an embedded system, in particular to a protection method for the state of a frame buffer (Frame Buffer) in a Qt / Embedded system. Background technique [0002] Qt / Embedded is a graphical user interface system for embedded Linux developed by the famous Qt library developer Trolltech, which adopts a server / client structure. Many Qt-based X micro-window system (X Window) programs can be ported to Qt / Embedded very conveniently, continuing the powerful functions on X, completely abandoning the X function library at the bottom layer, and only using the frame buffer as its bottom layer Graphical interface. Abundant control resources and good portability are the most outstanding aspects of Qt / Embedded. Using the development tools under X can directly develop the user interface based on Qt / Embedded. More and more third-party software companies have also begun to adopt Qt / Embedded to develop ap...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/00
Inventor 王鹏陈玄同刘文涵
Owner XUZHOU LIFANG MECHANICAL & ELECTRICAL EQUIP MFG CO LTD