On 11/12/2018 4:36 PM, Stephan Witt wrote: > Am 12.11.2018 um 14:03 schrieb Stephen Buonopane <sbuon...@bucknell.edu>: >>> 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? > There are fundamental differences between the handling of SVG and PDF files > in LyX. > > LyX is using Qt plugins to render the images on screen. > > For PDF files one has to convert them to temporary bitmap files because there > is no plugin to render them directly. (Perhaps this is not true anymore.) For > SVG files there is a plugin. But this one is limited in functionality. There > was a decision to not use it for on-screen display because of the complaints > regarding missing details. > > The problem with the temporary images is the fixed resolution of the > generated images. The used cache is not invalidated in case of higher preview > zoom levels. Furthermore you can have different resolutions at runtime too. > In case of a machine with multiple monitors with different physical > resolutions you get different values for moving the LyX window around. > > Stephan
This makes sense. Do you think it is reasonable that I put this as a wish to the tracker?
