Character display method and system based on qt Embedded system

Abstract

A character display method and system based on a QT Embedded system, the method comprising: receiving a character display request (S100); searching, in a pre-stored character bitmap mapping table, for a bitmap corresponding to a character to be displayed (S101); and displaying the bitmap according to a predetermined display format (S102). The method searches for and displays, by establishing the character bitmap mapping table, the bitmap having the predetermined display format when display of the character is required, thus avoiding a problem in the prior art in which system resources are occupied by frequent calculation of character dimensions, the effects of character alignment and layout of a position where the character is located and the like when character display is required, thereby saving system resources, avoiding effects on other functions, preventing the system from being interrupted and the slow response thereof, and improving user experience.

Description

Technical field [0001] The invention relates to the field of display technology, in particular to a character display method based on the QT Embedded system, and also relates to a character display system based on the QT Embedded system. Background technique [0002] In the prior art, the Qt Embedded system is the embedded version system of the graphical interface development tool Qt, that is, the embedded graphical interface development tool system, which interfaces with Linux I / O through Qt API (Application Program Interface, application program interface) And Frame buffer (frame buffer, standard display device driver interface) directly interacts, has high operating efficiency, and adopts object-oriented programming as a whole, and has a good architecture and programming mode. [0003] Specifically, the QT Embedded system is used in the common software environment of embedded hardware architecture. It has the advantage of cross-platform. The same code can be applied to different...

AI Technical Summary

Problems solved by technology

The QT Embedded system uses the QLabel (Qt's label display class) class for character display, but when refreshing and changing frequently, QLabel will occupy a huge amount of embedded system processor resources

Specifically, for the QLabel class, the QT Embedded system needs to calculate the size of the character, the impact of character alignment, and the impact of the layout of the character position every time the character display is refreshed, and these calculations are performed at high refresh rates. It will highlight the problem of resource consumption and consumption, and even affect other operations and display functions, resulting in poor user experience

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