Interleaved tiling method and storage medium of pictures based on canvas

A picture and tiling technology, applied in the field of picture drawing, can solve problems such as low browser rendering performance, user freeze or no response, etc., to avoid freeze problems, improve tiling efficiency, and strong practicability

Active Publication Date: 2022-04-12
FUJIAN TIANQUAN EDUCATION TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of a large number of Image Doms in this implementation method, the rendering performance of the browser will be very low. When the number is large, there will be a high probability that the user will be unable to operate or not respond.

Method used

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  • Interleaved tiling method and storage medium of pictures based on canvas
  • Interleaved tiling method and storage medium of pictures based on canvas
  • Interleaved tiling method and storage medium of pictures based on canvas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Please refer to Figure 4 , this embodiment provides a canvas-based method for interlaced tiling of pictures, which can be more efficient, more convenient to operate, and more smoothly complete the effect of interlaced tiling of pictures.

[0078] The method of this embodiment includes:

[0079] S1: Obtain the tiled image Image DOM used for tiling;

[0080] S2: respectively set the flag of whether to stagger horizontally and whether to stagger vertically;

[0081] S3: Create a new Canvas DOM, and set its width and height according to the overall image size set by the user;

[0082] S4: Obtain the context 2d object of Canvas DOM, that is, the 2D image drawing tool set of Canvas DOM;

[0083] S5: Calculate the number of horizontal tiles and the number of vertical tiles;

[0084] S6: Take the number of horizontal tiles as the first layer, and the number of vertical tiles as the second layer, refer to the logo of whether to stagger horizontally and whether to stagger ve...

Embodiment 2

[0091] This embodiment corresponds to Embodiment 1 and is further expanded:

[0092] 1. Obtain the original image Image DOM (named image) for tiling, read its width and height, and name them image_width and image_height respectively;

[0093] 2. Create a new Canvas DOM (named canvas in this embodiment for convenience of description), set its width and height as the size that needs to be tiled, that is, the size of the final rendering, and name it canvas_width and canvas_height respectively;

[0094] 3. Use variables to store whether to stagger horizontally (horStagger) or verStagger vertically; if the value is 1, it means yes, and if the value is 0, it means no;

[0095] 4. Obtain the context 2d object of the canvas (named context for convenience);

[0096] 5. Calculate the number of tiling required for horizontal x_count and vertical y_count respectively;

[0097] Among them, x_count = round up (canvas_width / (image_width+x_space));

[0098] y_count = round up (canvas_heigh...

Embodiment 3

[0113] This embodiment corresponds to Embodiment 1 and Embodiment 2, and provides a specific application scenario:

[0114] Assuming that a 100*100 picture is to be tiled "horizontally staggered" into a 200*300 environment, the following corresponds to the steps of Embodiment 1 and Embodiment 2 for description:

[0115] 1. Get the Image DOM of the source image, name it image, where image_width=100, image_height=100; for example Figure 5 shown;

[0116] 2. Create a new Canvas DOM, name it canvas, set the flat capture size canvas_width=200, canvas_height=300;

[0117] 3. According to the requirement of "horizontal staggering", set horStagger=1; verStagger=0;

[0118] 4. Get the 2d context from the canvas created in the previous step, and name it context;

[0119] 5. Calculate the number of tiles:

[0120] x_count=round up (canvas_width / image_width)=floor(200 / 100)=2;

[0121] y_count = round up (canvas_height / (iamge_height)=floor(300 / 100)=3.

[0122] So it needs to be tile...

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Abstract

The present invention provides a canvas-based image interlaced tiling method and storage medium. The method includes: respectively setting the logo of whether to interleave horizontally and the logo of whether to interleave vertically; creating a new Canvas DOM, and setting its width and height as the width and height of the image; according to the image The width and height of the tile image and the width and height of the tiled image are calculated to obtain the number of horizontal tiles and the number of vertical tiles; the number of horizontal tiles is the first layer, and the number of vertical tiles is the second layer. The staggered logo and the vertically staggered logo, using the tiled image and its width and height as parameters, call the 2D image drawing tool set of the Canvas DOM to perform a nested loop operation, and draw the tiled image in the Canvas DOM .

Description

technical field [0001] The invention relates to the field of picture drawing, in particular to a canvas-based picture interlaced tiling method and a storage medium. Background technique [0002] Many image-related online products, such as online image editors, online product personalized logo customization, etc., in many cases have the need to provide image interleaved tiling function. The effect of interlaced tiling of pictures is as follows: figure 1 (staggered tile vertically) and figure 2 (horizontally staggered tiling). [0003] The existing tiling scheme is to clone the Image DOM of an original image into an Image DOM with the number of length*width according to the tile size. figure 1 , is to clone 5*7=35 Image Doms to achieve. Due to the existence of a large number of Image Doms in this implementation method, the rendering performance of the browser will be very low. When the number is large, there will be a high probability that the user will be unable to opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/957G06F16/958
CPCG06F16/9574G06F16/958
Inventor 刘德建陈铭陈耀灿郭玉湖陈宏
Owner FUJIAN TIANQUAN EDUCATION TECH LTD
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