Picture tiling method based on CANVAS and storage medium

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

Pending Publication Date: 2020-12-18
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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  • Picture tiling method based on CANVAS and storage medium
  • Picture tiling method based on CANVAS and storage medium
  • Picture tiling method based on CANVAS and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Please refer to image 3 , this embodiment provides a canvas-based image tiling method, which can be more efficient, more convenient to operate, and more smoothly complete the image tiling effect.

[0063] The method of this embodiment includes:

[0064] S1: Obtain the tiled image Image DOM used for tiling;

[0065] S2: Obtain the horizontal tiling interval and vertical tiling interval set by the user;

[0066] S3: Create a new Canvas DOM, and set its width and height according to the overall image size set by the user;

[0067] S4: Obtain the context 2d object of Canvas DOM, that is, the 2D image drawing tool set of Canvas DOM;

[0068] S5: Calculate the number of horizontal tiles and the number of vertical tiles;

[0069] S6: Use the number of horizontal tiles as the first layer, the number of vertical tiles as the second layer, use the tiled image and the width and height of the tiled image as parameters, call the 2D image drawing tool set of the Canvas DOM to ex...

Embodiment 2

[0076] This embodiment corresponds to Embodiment 1 and is further expanded:

[0077] 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;

[0078] 2. Obtain the interval of horizontal tiling and the interval of vertical tiling, and name them x_space and y_space respectively;

[0079] 3. 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;

[0080] 4. Obtain the context 2d object of the canvas (named context for convenience);

[0081] 5. Calculate the number of tiling required for horizontal x_count and vertical y_count respectively;

[0082] Among them, x_count = round up (canvas_width / (image_width+x_space));

[0083] y_count = round up (canvas_height / (image_height+y_space));

[0084] ...

Embodiment 3

[0096] This embodiment corresponds to Embodiment 1 and Embodiment 2, and provides a specific application scenario:

[0097] Assuming that a 100*100 picture is to be tiled into a 210*340 environment, the following corresponds to the steps of Embodiment 1 and Embodiment 2 for description:

[0098] 1. Get the Image DOM of the source image, name it image, where image_width=100, image_height=100; for example Figure 4 shown;

[0099] 2. Assume that the interval between each picture is 10 when tiling horizontally, and the interval between each picture is 20 when tiling vertically, then set: x_space=10, y_space=20;

[0100] 3. Create a new Canvas DOM, name it canvas, set the flat capture size canvas_width=210, canvas_height=340;

[0101] 4. Get the 2d context from the canvas created in the previous step, and name it context;

[0102] 5. Calculate the number of tiles:

[0103] x_count=round up (canvas_width / (image_width+x_space))=ceil(210 / (100+10))≈2

[0104] y_count=round up (ca...

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Abstract

The invention provides a canvas-based picture tiling method and a storage medium. The method comprises the following steps of respectively setting a transverse tiling interval and a longitudinal tiling interval; a Canvas DOM being newly built, and the width and the height of the Canvas DOM being set to be the width and the height of the image; according to the width and height of the image, the width and height of the tiled image, the transverse tiling interval and the longitudinal tiling interval, calculating to obtain a transverse tiling number and a longitudinal tiling number; and calling a2D image drawing tool set of the Canvas DOM to execute nested loop operation by taking the transverse tiling number as a first layer, the longitudinal tiling number as a second layer and the tiled image and the width and the height of the tiled image as parameters, and drawing 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 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., all have the need to provide image tiling functions. Image tiling effect such as figure 1 shown. [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 operate or not respond. [0004] Therefore, there is a need to provide a new image tiling method to solve the above problems. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(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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