Fix bad resolution for pdfs (#23)

2026-09-09 11:29:14 -04:00 · 2024-04-26 03:52:21 +00:00
parent 5600b6c0dc
commit 28a757e5bb
1 changed files with 7 additions and 1 deletions
@@ -494,7 +494,13 @@ const annotationLayerBuilderCSS = `
 `

 const renderPage = async (page, getImageBlob) => {
-    const scale = devicePixelRatio
+
+    const naturalPdfSize = page.getViewport({ scale: 1 })
+    const naturalPdfRatio = naturalPdfSize.width / naturalPdfSize.height
+    const appRatio = innerWidth / innerHeight
+    const pdfToAppResolutionRatio = appRatio / naturalPdfRatio
+
+    const scale = devicePixelRatio * pdfToAppResolutionRatio
    const viewport = page.getViewport({ scale })

    const canvas = document.createElement('canvas')