index.ts
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// @ts-nocheck
// #ifndef UNI-APP-X && APP
import type { ComponentInternalInstance } from '@/uni_modules/lime-shared/vue'
import { getRect } from '@/uni_modules/lime-shared/getRect'
import { canIUseCanvas2d } from '@/uni_modules/lime-shared/canIUseCanvas2d'
export const isCanvas2d = canIUseCanvas2d()
// #endif
export function createCanvas(canvasId : string, component : ComponentInternalInstance) {
// #ifdef UNI-APP-X
uni.createCanvasContextAsync({
canvasId,
component,
success(context : CanvasContext) {
},
fail(error : UniError) {
}
})
// #endif
// #ifndef UNI-APP-X
const isCanvas2d = canIUseCanvas2d()
getRect('#' + canvasId, context, isCanvas2d).then(res => {
if (res.node) {
res.node.width = res.width
res.node.height = res.height
return res.node
} else {
const ctx = uni.createCanvasContext(canvasId, context)
if (!ctx._drawImage) {
ctx._drawImage = ctx.drawImage
ctx.drawImage = function (...args) {
const { path } = args.shift()
ctx._drawImage(path, ...args)
}
}
if (!ctx.getImageData) {
ctx.getImageData = function () {
return new Promise((resolve, reject) => {
uni.canvasGetImageData({
canvasId,
x: parseInt(arguments[0]),
y: parseInt(arguments[1]),
width: parseInt(arguments[2]),
height: parseInt(arguments[3]),
success(res) {
resolve(res)
},
fail(err) {
reject(err)
}
}, context)
})
}
return {
getContext(type: string) {
if(type == '2d') {
return ctx
}
},
width: res.width,
height: res.height,
createImage
}
}
}
})
// #endif
}