Character display method and system based on QT Embedded system

Abstract

The invention discloses a character display method and system based on a QT Embedded system. The character display method includes the steps of receiving a request for displaying characters, searching a pre-stored character bitmap mapping table for bitmaps corresponding to the characters needing to be displayed, and displaying the bitmaps according to preset display formats. According to the character display method and system, due to the fact that the character bitmap mapping table is built, and the bitmaps in the preset display formats are found and displayed when the characters need to be displayed, the problem that in the prior art, when the characters need to be displayed, system resources are occupied under the condition that character sizes, influences of character alignment and influences of arranging the positions of the characters are calculated in a high-frequency mode is solved, the system resources can be saved, other functions are prevented from being influenced, interruption and slow responses of the system are prevented, and user experiences are improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a character display method based on the QT Embedded system, and also to a character display system based on the QT Embedded system. Background technique [0002] In the prior art, the Qt Embedded system is an embedded version system of the graphical interface development tool Qt, that is, the embedded graphical interface development tool system, which interfaces with the Linux I / O through the Qt API (Application Program Interface, application program interface) And Frame buffer (frame buffer, standard display device driver interface) interacts directly, 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, which has the advantage of cross-platform, and the same code can be...

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

Images