Method and system for eliminating horizontal image tearing

Abstract

The invention relates to a method for eliminating horizontal image tearing. The method comprises the following steps: (S1) constructing at least three frame buffers in a display card, and respectively setting one read-write mutual exclusion marker and a time marker in each frame buffer; (S2) setting the read-write mutual exclusion marker of the frame buffer in a write operation state and at the same time writing image data into the frame buffer, setting the time value of the time marker as the time moment when the write-in operation is completed and simultaneously setting the read-write mutual exclusion marker in an idle state; and (S3) setting the read-write mutual exclusion marker of the frame buffer in a read operation state, reading the image data in the frame buffer and outputting the image data to a display, setting the read-write mutual exclusion marker in the idle state after completing the reading operation, and simultaneously keeping the value of the time marker invariant. The invention also provides a system for eliminating horizontal image tearing. The method provided by the invention can not only eliminate the horizontal image tearing, but also ensure the frame rate for image rendering while displaying images.

Description

technical field [0001] The invention relates to image display technology, in particular to a method and system for eliminating image horizontal tearing. Background technique [0002] In the current image display field, in order to eliminate the horizontal tearing phenomenon of the picture, we usually need to turn on the vertical synchronization of the graphics card; and turning on the vertical synchronization of the graphics card will cause a sharp drop in the image rendering frame rate. like figure 1 as shown, figure 1 It is a schematic diagram of a sharp drop in frame rate caused by turning on vertical synchronization. Without turning on vertical synchronization, the graphics card can render and display a total of 11 frames of a / b / c / d / e / f / g / h / i / j / k , but in use, the image may be torn horizontally. In "Vertical Synchronization Time of Graphics Card", each black vertical line represents a vertical synchronization, and the time between vertical synchronizations is uniform;...

AI Technical Summary

Problems solved by technology

It can be seen from the figure that when the vertical synchronization is turned on when the time f is reached, only 5 frames of a / b / c / d / e / f are displayed, so although turning on the vertical synchronization can eliminate the horizontal tearing of the image phenomenon, but it will cause a sharp drop in the frame rate, which affects the display effect

Images