fix: 解决预览时模糊问题

src/hooks/useCanvasInitOptions.hook.ts

@@ -0,0 +1,26 @@
+import { inject, type Ref } from 'vue'
+import { EchartsRenderer } from '@/settings/chartThemes'
+import { SCALE_KEY } from '@/views/preview/hooks/useScale.hook'
+import { use } from 'echarts/core'
+import { CanvasRenderer, SVGRenderer } from 'echarts/renderers'
+
+use([CanvasRenderer, SVGRenderer])
+
+type InitOptions = {
+  renderer: EchartsRenderer
+  devicePixelRatio?: number
+}
+
+// 获取需要给当前echarts组件设置什么初始值
+export function useCanvasInitOptions(option: any, themeSetting: any) {
+  const renderer = option.renderer || themeSetting.renderer
+  const initOptions: InitOptions = { renderer }
+  const scaleRef = inject<Ref<{ width: number; height: number }>>(SCALE_KEY) || { value: { width: 1, height: 1 } }
+
+  if (renderer === 'canvas') {
+    initOptions.devicePixelRatio = Math.ceil(
+      Math.max(window.devicePixelRatio, scaleRef.value.width, scaleRef.value.height)
+    )
+  }
+  return initOptions
+}