Re: PDF graphics is blurred in LyX when scaled
On 14-Nov-18 11:36 PM, Stephan Witt wrote: > Am 12.11.2018 um 18:53 schrieb Baris Erkus : >> On 11/12/2018 4:36 PM, Stephan Witt wrote: >>> Am 12.11.2018 um 14:03 schrieb Stephen Buonopane : > On Nov 12, 2018, at 7:52 AM, Baris Erkus wrote: > > On 12-Nov-18 3:38 PM, Kornel Benko wrote: >> Am Montag, 12. November 2018 13:21:58 CET schrieb Daniel >> : >>> 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? > I think it’s already there… but couldn’t find it ATM. > > Stephan I opened a ticket as a request... https://www.lyx.org/trac/ticket/11379
Skim 1.4.37 resets to first page after updating PDF (LyX 2.3.1, Mac OS 10.11.6)
Hello Macintosh LyX users, After updating Skim to Version 1.4.37, when I update a PDF in LyX 2.3.1, the document resets to the first page. I’m using Mac OS 10.11.6. This is annoying to say the least, as I have to repeatedly scroll to where corrections were made. I don’t know what I’m doing, but I did try to remedy the problem in my own way, which was to install MacTeX 2018, but this made no difference. I believe I set up viewing files in Skim correctly, as it worked like a champ until the application was updated. I would be very pleased if someone could share their knowledge on how to fix the problem. Thank you very much in advance. Best regards, Daisuke
Re: PDF graphics is blurred in LyX when scaled
Am 12.11.2018 um 18:53 schrieb Baris Erkus : > > On 11/12/2018 4:36 PM, Stephan Witt wrote: >> Am 12.11.2018 um 14:03 schrieb Stephen Buonopane : On Nov 12, 2018, at 7:52 AM, Baris Erkus wrote: On 12-Nov-18 3:38 PM, Kornel Benko wrote: > Am Montag, 12. November 2018 13:21:58 CET schrieb Daniel > : >> 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? I think it’s already there… but couldn’t find it ATM. Stephan
