Which product are you using? PDF.js Express Viewer PDF.js Express Version 8.7.4 Detailed description of issue In some pdfs, zooming out blurs the pdf. The blurring becomes stronger when the magnification is set to less than 100%. The blurring often occurs when the devicePixelRatio of the disp…

Thank you for posting the incident to our forum. We will provide you with an update as soon as possible.

Hello dev1, Can you provide any sample photos of the blurriness? You tried setCanvasMultipier, did you try to rerender after doing this? Best regards, Tyler

As shown in the code below, after setCanvasMultiplier, loadDocument is done and rerender is done. image quality did not change whether loadDocument was done or not. webViewer( { path: '/pdfjsexpress', initialDoc: path, licenseKey: key, …

Hello dev1, Have you tried setting the canvas multiplier higher? There is a point at which the document should become blurry as the device’s resolution reaches the minimum legible font size. What is the resolution of your screen? Best regards, Tyler

The resolution (screen size) is as follows 1920 x 1080 The image also appears blurred at the following resolutions. 3440 x 1440 The image quality was not improved by setting the setCanvasMultiplier value to 1, 2, or 3. How can I set a higher canvas multiplier other than using the setCanvasMulti…

@tgordon Sorry to rush you, but I would appreciate an answer. I am really in a bind.

Hello dev1, Apologies for the delay, I was still unable to reproduce this with the provided file and the resolutions. When you do setCanvasMultipier, try resetting the zoom by doing, to trigger a rerender: instance.Core.documentViewer.zoomTo(instance.Core.documentViewer.getZoomLevel()) Let me k…

@tgordon I have tried the following steps and the resolution remains the same. As usual, zooming in improves the image quality, but zooming out deteriorates it. Is there any other way? instance.Core.setCanvasMultiplier(2) instance.Core.documentViewer.zoomTo( …

PDF is blurry when zoomed out

Technical Support

dev1 November 29, 2023, 2:29am 11

@tgordon Sorry to rush you, but I am awaiting your response.

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PDF is blurry when zoomed out

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