Method for realizing rotation of handheld device screen pictures by 90 degrees and 270 degrees simultaneously

Abstract

The invention relates to a method for realizing the rotation of handheld device screen pictures by 90 degrees and 270 degrees simultaneously. A rotary circuit structure is designed, which comprises an external source memory, a CPU, a bus, an external target memory and a rotary unit, wherein the external source memory, the CPU and the external target memory are respectively connected to the bus; the bus is connected with the rotary unit; the rotary unit comprises a configuration register, an image block reading unit, a rotary control unit, an internal buffer and an image block write-back control unit; the image block reading unit is connected with the rotary control unit; the rotary control unit is connected with the internal buffer; the internal buffer is connected with the image block write-back control unit; and the image block reading unit and the image block write-back control unit are respectively connected to the bus. In the method, only a small buffer capacity is needed, and the circuit realization area is saved to the maximum extent; and circuits with different functions can be used repeatedly, thereby reducing the circuit realization area greatly.

Description

【Technical field】 [0001] The invention belongs to the technical field of screen image display, and specifically refers to a method for simultaneously realizing 90-degree and 270-degree rotation of a screen image of a handheld device. 【Background technique】 [0002] With the development of technology and the improvement of mobile terminal performance, users have higher and higher requirements for information acquisition. As a visual carrier, the screen is the most important means of information acquisition. How to enable users to obtain a better user experience when using mobile terminal devices is the direction of many manufacturers' efforts. It is the most direct and effective way to improve user experience through brilliant screen display. The screen image rotation display makes the image ratio closer to the aspect ratio of the screen by rotating the image, so that users can obtain a larger viewing range, which has become a hot spot in the current display technology. How...

AI Technical Summary

Problems solved by technology

This method consumes a lot of hardware resources and requires a large number of storage units; and if GPU processing is used, it usually needs to be processed through a fixed API interface, such as OpenGL

This makes the programming work relatively complicated when using

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