MobileRead Forums - View Single Post - Can't open California Digital Library pdfs on older Kindle

MarjaE · 09-05-2017, 08:43 PM

MacOS uses Quartz to render images, and to create pdfs.

Preview has a number of filters for graphic effects and one overly-aggressive filter for compression. Some pdf tools include a range of filters for compression, at 300 dpi, 150 dpi, 72 dpi, etc.

Older versions of Quartz sometimes removed the text layers. Newer ones tend not to.

09-05-2017, 08:43 PM	#7
MarjaE Guru Posts: 924 Karma: 53902736 Join Date: Jun 2015 Device: multiple	MacOS uses Quartz to render images, and to create pdfs. Preview has a number of filters for graphic effects and one overly-aggressive filter for compression. Some pdf tools include a range of filters for compression, at 300 dpi, 150 dpi, 72 dpi, etc. Older versions of Quartz sometimes removed the text layers. Newer ones tend not to.