Dot matrix character scaling method and system

Abstract

The invention relates to a dot matrix character scaling method and system for outputting characters with required font size to a final display area according to a basic dot matrix character bank. The dot matrix character scaling method comprises the following steps of: S1, establishing an original display area with the pixel size identical to the font size of the basic dot matrix character bank; S2, establishing a temporary display area with the pixel size identical to the required font size; S3, calling dot matrix code information corresponding to required characters from the basic dot matrix character bank and displaying the dot matrix code information to the original display area; S4, calling a bilblt function for performing scaling operation on pixel point information in the original display area, and filling the scaled pixel point information into the temporary display area; and S5, copying contents in the temporary display area to the final display area. In the invention, the bilblt function of hardware is utilized to smooth the basic dot matrix character bank to obtain required dot matrix characters of other font sizes, and the advantages of simple algorithm, conversion rapidness, good effect, smaller required storage space and no occupation of CPU (Central Processing Unit) resources are achieved.

Description

technical field [0001] The present invention relates to character display technology, and more specifically, relates to a method and system for scaling dot matrix characters. Background technique [0002] During the character output process, the character information stored in the font library needs to be used. Fonts are divided into dot matrix fonts and vector fonts according to their different principles of describing character information. Among them, the vector font library records the outline information of characters and has the function of stepless scaling, but it is difficult to construct the font library and the cost is high, and the algorithm for character output is also relatively complicated. [0003] The dot matrix font library describes whether each pixel of the character is colored or not. The structure of the dot matrix font is simple, and the character output algorithm is also very simple. At the same time, the CPU and storage resources occupied by the fon...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for dot matrix font scaling in view of the defect that the output algorithm of the dot matrix font library in the prior art is complicated and easy to be distorted when it is necessary to output characters that are not integer multiples

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