From e831a477d28f0669f7a02a2380a6a3692c6e6e8d Mon Sep 17 00:00:00 2001 From: Pavel Akhrameev Date: Fri, 5 Dec 2025 04:29:40 +0400 Subject: [PATCH] Change image embedding from PNG to JPEG format using PNG increased filesize from ~60 MB to ~112 MB. That's too much. May require some "quality" parameter adjustment. --- src/js/logic/cropper.ts | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/src/js/logic/cropper.ts b/src/js/logic/cropper.ts index e10f2ca..d68110d 100644 --- a/src/js/logic/cropper.ts +++ b/src/js/logic/cropper.ts @@ -219,10 +219,14 @@ async function performFlatteningCrop(cropData: any) { finalHeight ); - const pngBytes = await new Promise((res) => - finalCanvas.toBlob((blob) => blob.arrayBuffer().then(res), 'image/png') + // Quality value from the compress-pdf.js settings. + // 0.9 for "High Quality", 0.6 for "Balanced". Let's use High Quality. + const jpegQuality = 0.9; + + const jpegBytes = await new Promise((res) => + finalCanvas.toBlob((blob) => blob.arrayBuffer().then(res), 'image/jpeg', jpegQuality) ); - const embeddedImage = await newPdfDoc.embedPng(pngBytes as ArrayBuffer); + const embeddedImage = await newPdfDoc.embedJpg(jpegBytes as ArrayBuffer); const newPage = newPdfDoc.addPage([finalWidth, finalHeight]); newPage.drawImage(embeddedImage, { x: 0,