Image rendering method and image rendering device

Abstract

Disclosed are an image rendering method and an image rendering device. The method includes the steps of creating at least two frame buffer objects, creating an image rendering thread, rendering image data to the frame buffer objects, creating a swap thread, exchanging image data stored by a rear buffer to a front rear, and copying the rendered image data from the frame buffer objects to the rear buffer. According to the image rendering method and the image rendering device, the image rendering thread and the swap thread belong to different threads and can be executed concurrently, and blocking of a swap buffer of the swap thread does not affect image rendering of the image rendering thread, so that the frame rate of image rendering can be guaranteed; meanwhile, the image rendering thread is not blocked, and user's operations can be responded as soon as possible, so that operation delay can be reduced.

Description

technical field [0001] The present invention relates to the technical field of image display, in particular to an image rendering method and device. Background technique [0002] At present, there are roughly two processes for rendering and displaying images: [0003] (1) Turn on vertical synchronization and use double buffering mode: in response to the user's image operation, render the image to BBuffer (Back Buffer, back buffer), then Swap buffer, copy the image to FBuffer (Front Buffer) so that the user can see the image, So cycle. [0004] (2) Do not enable vertical synchronization, and use double buffer mode: render the image to BBuffer, then Swap buffer, copy the image to FBuffer so that the user can see the image, and so on. [0005] In these two ways, the process seems to be the same, but in (2), because the vertical synchronization is not turned on, it will cause horizontal tearing of the image; in (1), because the vertical synchronization is turned on, it will ca...

AI Technical Summary

Problems solved by technology

If the display refresh frame rate is 60FPS (Frames Per Second), in the worst case, the Swap buffer will be blocked for 16ms, which is enough to cause the next rendering cycle to block, resulting in slow response to user operations

In addition, all the loops are serial. Once the previous loop is stuck for a long time, the subsequent rendering will be delayed accordingly, exacerbating the problem of slow response operation, and the frame rate of image rendering cannot be guaranteed.

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