On 11/12/2018 4:03 PM, Stephen Buonopane wrote: > >> On Nov 12, 2018, at 7:52 AM, Baris Erkus <bariser...@hotmail.com> wrote: >> >> On 12-Nov-18 3:38 PM, Kornel Benko wrote: >>> Am Montag, 12. November 2018 13:21:58 CET schrieb Daniel <xraco...@gmx.de>: >>>> On 11/11/2018 19:14, Paul A. Rubin wrote: >>>>> On 11/10/18 9:45 PM, Baris Erkus wrote: >>>>>> Hello, >>>>>> >>>>>> PDF graphics appears to be blurred in LyX when scaled from Graphics >>>>>> Options --> LaTeX and LyX options --> Show in LyX --> Scale on Screen. >>>>>> >>>>>> I am not sure if this is a feature to reduce CPU rendering workload or >>>>>> smtg, but it would be really nice to have a clear view of the PDF >>>>>> while working on the document rather than looking at it using a PDF >>>>>> viewer. >>>>>> >>>>>> See MWE and the view from LyX below. >>>>>> >>>>>> Baris >>>>>> >>>>>> >>>>> The image in your PDF file is a bitmap (PNG), so I don't hold out much >>>>> hope for being able to zoom it without loss of fidelity. >>>> Why do you think the graphic in the PDF is a bitmap? I have zoomed in on >>>> it and never got any pixels to see. At least it must be an extremely >>>> high resolution bitmap then. >>>> >>>> Daniel >>>> >>> Because PNG format is bitmap? >>> PNG image data, 652 x 668, 8-bit/color RGB, non-interlaced >>> >>> Kornel >>> >> The external graphics is in PDF, which is attached to the original >> e-mail; it was generated in Tikz, so it is a vector graphics. No >> question about it. When inserted into LyX, maybe LyX creates a >> temporary bitmap or PNG file to show to the user, I am not sure. >> >> It should not be a big thing to show a higher resolution graphics or to >> let the user decide for possible performance issues. One day I will be >> doing all these small modification by myself, but when that I do not >> know... :-) >> >> Baris > > Yes LyX creates a PNG file for the on-screen preview within LyX (It also does > this for the math preview) > If you dig into the LyX temp directory you will find all of the PNG files. > > I recall that an older version of LyX (on Mac) did not use PNG for on-screen > previews, in which case it may be possible to revert to the older behavior > even in 2.3.X? > > > >
In fact, I found the temporary folder that collects the PNGs: C:\Users\**UserName**\AppData\Roaming\**LyXFolder**\cache (Windows 10, 64 bit, LyX, 2.3.1-1) I erased the PNGs and re-opened the LyX file. I generated the PNG right in front of my eyes. But it is the same PNG with low quality. :-( Maybe, there are some other issues with showing either the PDF or a higher resolution PNG as Stephan Witt mentioned. Baris
