CN111354060B

CN111354060B - Window animation acceleration method and device based on double-buffer technology and storage medium

Info

Publication number: CN111354060B
Application number: CN202010103434.XA
Authority: CN
Inventors: 李晓辉; 胡胜发
Original assignee: Guangzhou Ankai Microelectronics Co ltd
Current assignee: Guangzhou Ankai Microelectronics Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2023-07-07
Anticipated expiration: 2040-02-19
Also published as: CN111354060A

Abstract

The invention provides a window animation acceleration method, a device and a storage medium based on a double-buffer technology, wherein the method comprises the following steps: drawing a target image in a rear buffer; before copying the target image to a final display position in a front buffer, converting each frame of the target image into N frames of images in the front buffer through a graph copying function according to a window animation effect; compared with the prior art, the embodiment of the invention only needs to draw 1 time after back buffer and forward buffer and copy N times of images, a large number of back buffer drawing processes are reduced, and the window animation can be smoothly displayed even on equipment provided with a low-end CPU. In addition, the invention can also improve the display resolution of the window animation.

Description

Window animation acceleration method and device based on double-buffer technology and storage medium

Technical Field

The present invention relates to the field of computer technologies, and in particular, to a method and apparatus for accelerating a window animation based on a double buffering technology, and a storage medium.

Background

With the development of the age, modern GUIs add many animation effects, such as fading, scrolling, zooming, etc. of windows or pictures to increase aesthetics, cool and affinity. In the GUI, the double buffering technique is mainly used to mitigate screen flicker caused by window drawing. FIG. 1 shows a prior art double buffering technique, where the program renders graphics in a back buffer (also called off-screen buffer), and after rendering, hands the rendering area to the CPU/GPU for copying to the corresponding front buffer (i.e., screen display content). Assuming that a window animation has N frames to draw, then the back buffer needs to draw N times and the CPU/GPU copies N times forward buffer, i.e., the CPU/GPU needs to copy the back buffer draw field into the front buffer one-to-one. The double buffer technology increases the buffer overhead by about one time, and because the memory copy occupies more running time of the CPU/GPU, when the window animation is enabled, such as when the CPU/GPU performance is low, the display of the window animation can be very stuck, unpleasant, and influence the operation, and the method is counterproductive.

Disclosure of Invention

The invention aims to provide a double-buffer-based window animation acceleration method, which is improved on the basis of a double-buffer technology and realizes a window animation effect by a frame interpolation method, so that an animation window can be smoothly displayed even on equipment provided with a low-end CPU.

In order to solve the above technical problems, an embodiment of the present invention provides a method for accelerating a window animation based on a double-buffer technique, which copies an image drawn in a rear buffer into a front buffer by an animation interpolation method, including:

drawing a target image in a rear buffer;

before copying the target image to a final display position in a front buffer, converting each frame of the target image into N frames of images in the front buffer through a graph copying function according to a window animation effect; wherein N is greater than or equal to 1, and the graph copy function is an interpolation algorithm, and the graph copy function at least comprises one or more of displacement, part, transparency and scaling.

The embodiment of the invention also provides a window animation acceleration device based on the double-buffering technology, which comprises:

a drawing module for drawing the target image in the rear buffer;

the copying module is used for converting each frame of target image into N frames of images in the front buffer through the copying function of the graph according to the window animation effect before copying the target image to the final display position in the front buffer; wherein N is greater than or equal to 1, and the graph copy function is an interpolation algorithm, and the graph copy function at least comprises one or more of displacement, part, transparency and scaling.

The embodiment of the invention also provides a computer readable storage medium, which is characterized in that the computer readable storage medium comprises a stored computer program, wherein when the computer program runs, the equipment where the computer readable storage medium is located is controlled to execute the window animation acceleration method based on the double-buffering technology.

Compared with the prior art that N times of drawing in the back buffer and N times of forward buffer copying are needed, the embodiment of the invention only needs to draw 1 time in the back buffer and N times of forward buffer copying, reduces a large number of back buffer drawing processes, and enables window animation to be smoothly displayed even on equipment provided with a low-end CPU. In addition, the embodiment of the invention can also improve the display resolution of the window animation.

Drawings

FIG. 1 is a schematic diagram of a prior art double buffering technique.

Fig. 2 is a flowchart of a window animation acceleration method based on a double-buffering technique according to an embodiment of the present invention.

FIG. 3 is an animation diagram of a window animation acceleration method based on a double buffer technique according to a preferred embodiment.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 2, fig. 2 is a flowchart of a window animation acceleration method based on a double-buffer technology, where the window animation acceleration method based on the double-buffer technology copies an image drawn in a rear buffer into a front buffer by an animation interpolation method, and copies a target image drawn in the rear buffer into the front buffer by an animation interpolation method, and the method includes steps 101 and 102:

step 101, drawing a target image in a rear buffer;

102, before copying the target image to a final display position in a front buffer, converting each frame of the target image into N frames of images in the front buffer through a graph copying function according to a window animation effect; wherein N is greater than or equal to 1, and the graph copy function is an interpolation algorithm, and the graph copy function at least comprises one or more of displacement, part, transparency and scaling.

The interpolation algorithm (interpolation technique) is a prior art.

In order to better explain the technical scheme of the invention, a window animation effect is taken as an example for explanation. Referring to fig. 3, first, as in the prior art, the drawing target image is back-buffered, and the front buffer (screen) is fully white. In the embodiment of the present invention, the black block in fig. 3 represents the target image drawn in the rear buffer.

Then, the copy target image was buffered forward, and the black block was copied to the lower portion of the front buffer, partially invisible, and the transparency of the black block was 75%.

Then, the copy target image was buffered forward, and the black block was copied to the lower portion of the front buffer, and the black block was seen to have a transparency of 50%.

Then, the copy target image was buffered forward, the black block was copied to the middle lower portion of the front buffer, and the background under the black block was copied, the transparency of the black block being 25%.

Finally, the copy target image is buffered forward, and the black block and the lower background are copied to the position where the front buffer is finally displayed, and the black block is opaque. The final display position of the black block in the front buffer is the same as the position of the black block drawn in the rear buffer.

Through the above steps, fig. 3 realizes the window animation by 3-frame interpolation, in practice, more frames can be interpolated, and the smooth eye-fitting window animation is formed during high-speed display. Fig. 3 only uses displacement and transparency in copying. In practice, the display portion, the size, the shape, even the color temperature, the saturation, and the like can be changed constantly and smoothly when the animation is interpolated. Some basic graphic replication functions, a large number of GUIs are provided, such as displacement, partial, transparent, zoom, etc., and are very efficient and may even be hardware accelerated. Thus, the window animation can be easily realized through double-buffer interpolation, and the window animation has higher performance.

The embodiment of the invention performs comparison tests on a low-end CPU based on ARM9 and a resolution hardware platform of 1024 x 600, and when the window is larger before modification, only 2-5 frames can be drawn per second, the window animation can not work basically, and the blocking is rough. After the method is modified, not only is the animation mode enriched, but also the frame rate is as high as 20-30 frames per second, the effect is quite obvious, and the method looks very fine and beautiful. Furthermore, when the transparency option is enabled, the animation process has multiple points of afterimage effect because the previous frame of image cannot be completely erased, but the animation process seems to be more beautiful and cool.

Compared with the prior art that N times of drawing are needed in the back buffer, and N times of forward buffer copying are needed to draw for 1 time in the back buffer, the embodiment of the invention only needs to draw for N times in the front buffer, and reduces a large number of back buffer drawing processes, so that window animation can be smoothly displayed even on equipment provided with a low-end CPU. In addition, the embodiment of the invention can also improve the display resolution of the window animation and save the cost.

and the drawing module is used for drawing the target image in the rear buffer.

The interpolation algorithm (interpolation technique) is a prior art.

In order to better explain the technical scheme of the invention, a window animation effect is taken as an example for explanation. Referring to fig. 3, first, as in the prior art, the drawing module buffers the drawing target image at the rear, and then buffers (screens) all white. In the embodiment of the present invention, the black block in fig. 3 represents the target image drawn in the rear buffer.

Then, the copy module buffers the copy target image forward, copies the black block to the lower portion of the front buffer, and is partially invisible, and the transparency of the black block is 75%.

Then, the copy module buffers the copy target image forward, copies the black block to the lower portion of the front buffer, and can see all the black block, and the transparency of the black block is 50%.

Then, the copy module buffers the copy target image forward, copies the black block to the middle lower portion of the front buffer, and copies the background under the black block, the transparency of the black block being 25%.

Finally, the copying module buffers the copy target image forwards, copies the black block and the lower background to the position where the front buffer finally displays the black block in an opaque way. The final display position of the black block in the front buffer is the same as the position of the black block drawn in the rear buffer.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims

1. The window animation acceleration method based on the double-buffer technology is characterized in that the target image drawn in the rear buffer is copied into the front buffer by an animation interpolation method, and the method comprises the following steps:

drawing a target image in a rear buffer;

2. Window animation accelerating device based on double buffering technology, which is characterized by comprising:

a drawing module for drawing the target image in the rear buffer;

3. A computer readable storage medium, wherein the computer readable storage medium comprises a stored computer program, and wherein the computer program when executed controls a device in which the computer readable storage medium is located to perform the window animation acceleration method according to claim 1.