canvasToTempFilePath报错

create bitmap failed

安卓下会报错，目前尝试了小米和华为手机

看到论坛里去年就有帖子提到过，说是screenWidth为0，但我打印出来screenWidth是正常的

相关代码：

this.ctx.draw(true,async()=>{                 const result = await wepy.canvasToTempFilePath({                     x: 0,                     y: 0,                     destWidth: canvasWidth  *4,                     destHeight: canvasHeight  *4,                     canvasId: 'painter',                     quality:1,                 })                 this.imagePath = result.tempFilePath                   this.$apply()             })