How to Change the Background Color During PDF View Rendering?

Question

Hello everyone,I've implemented a night mode for my application, where I've changed the background color of PDFs to black. However, when the PDF has many pages and I scroll through it, the PDF Viewer renders the pages with a white background, which looks quite jarring. Is there any available API or method to modify the background color during PDF rendering? Any help would be greatly appreciated.Thank you!

Manigandan Shanmugam · Answer

Rhyme, As per the provided
details, we come to know that you have changed the background color of the
pages in the PDF document. Usually PDF document does not have background
property for the pages in it, that’s why every PDF viewer application shows the
PDF pages in the white color ,this is the default behavior. Can you please
provide the document which you have changed the background color, it will be
helpful for us to reproduce and analysis on this.

Rhyme · Answer

Hello Manigandan,I would be happy to provide you with the relevant PDF. To make it easier for you to test, I have changed its background color to yellow. When you open it in PdfViewer and quickly scroll through it, the background color will change from yellow to white and then back to yellow again.Attachment: 100_Pages_background_d765ffc0.zip

Manigandan Shanmugam · Answer

Rhyme, As we
mentioned in the previous update, Pdf pages have no property for background
color, so all viewer application will display PDF pages as white before
rendering. You can also check that behavior with Google Chrome and Microsoft
Edge. Additionally, there is no API to alter the background color before
rendering. However, we are looking into possible workarounds to full fill your
requirement. We will analyze and provide further details on July 6, 2023.

Krithika Ganesan · Answer

Rhyme,
we have checked the possibility to achieve your requirement to render different
page color from sample. But there is no option to set background color. All
other viewer application will also display PDF pages as white before its
render.  It is the default behavior which you can also check with Google
Chrome and Microsoft Edge. So it is not possible to change the page color
before its render.

Rhyme · Answer

I see, thanks for your positive help

Swetha Srikumar · Answer

Most welcome.