Call the scale method in the WeChat applet to scale the horizontal coordinates
May 19, 2021 WeChat Mini Program Development Document
Table of contents
Drawing interfaces and methods
canvasContext.scale
Defined
After the
scale
is called, the horizontal coordinates of the path that is then created are scaled.
Scale is
scale
times, and the multiples are multiplied.
Parameters
| Parameters | Type | Description |
|---|---|---|
| scaleWidth | Number | Multiply of horizontal coordinate scaling (1 x 100%, 0.5 x 50%, 2 x 200%) |
| scaleHeight | Number | Multiply the scale of the ordinate axis (1 s 100%, 0.5 s 50%, 2 s 200%) |
Example
const ctx = wx.createCanvasContext('myCanvas')
ctx.strokeRect(10, 10, 25, 15)
ctx.scale(2, 2)
ctx.strokeRect(10, 10, 25, 15)
ctx.scale(2, 2)
ctx.strokeRect(10, 10, 25, 15)
ctx.draw()
