| | <<<Back 1 day (to 2017/01/05) | 20170106 |
| bencc1 | how do I list the fonts in eps file? | 11:26.03 |
| chrisl | bencc1: read the Postscript | 11:38.46 |
| bencc1 | chrisl: I see it now in the .eps file. thought there is a command line to get a list of fonts | 11:42.13 |
| | chrisl: are the fonts embedded? | 11:42.20 |
| chrisl | bencc1: we have a utility which, amongst other things, lists fonts in a PDF, but not for Postscript. | 11:43.17 |
| | I can't tell if the fonts are embedded, I can't see the file | 11:43.50 |
| | bencc1: You could convert it to PDF, and run the utility (pdf_info.ps) on the resulting PDF | 11:44.50 |
| bencc1 | chrisl: https://drive.google.com/open?id=0B12AhxvnYHrAVUUwVndqVklvYU0 | 11:54.02 |
| | this is the eps file | 11:54.05 |
| | let me explain what I'm trying to do: | 11:54.11 |
| | I have emf file with non free fonts | 11:54.26 |
| | I'm converting to eps with the fonts | 11:54.37 |
| | now I would like to replace the non-free fonts with free fonts | 11:55.48 |
| | possible? | 11:55.51 |
| chrisl | Unlikely | 11:56.07 |
| bencc1 | why not? | 11:56.53 |
| | the David font is embedded in the eps I shared above? | 11:57.09 |
| | how can I check? | 11:57.12 |
| chrisl | How much do you know about Postscript and fonts? | 11:57.18 |
| | Yes, font is embedded in the EPS | 11:58.15 |
| bencc1 | I don't know anything :) | 11:58.27 |
| | how can I tell that it is embedded? | 11:58.37 |
| chrisl | Well, without really understanding Postscript, you're going to struggle to be *sure*, in general. But in this case, if you open the EPS in a text editor, and look around line 48 you can see the definition of the font | 11:59.58 |
| bencc1 | looking | 12:01.44 |
| chrisl | The problem with replacing the font with another one comes from the "Encoding" definition, which dictates the mapping from a character to an actual glyph outline. In this case, the Encoding appears to be a custom one | 12:02.21 |
| bencc1 | it says: /FontName /David def | 12:02.34 |
| | I wasn't able to replace a font in the original EMF | 12:03.13 |
| chrisl | Yes, so those lines with /FontName, /Encoding, /PaintType, /FontMatrix etc are all things required to define a valid font | 12:03.33 |
| bencc1 | EMF probably point to a specific glyph in the font file | 12:03.34 |
| chrisl | Can you convert the EMF to EPS *without* embedding the font? | 12:04.00 |
| bencc1 | chrisl: I don't know. I'm using this: https://wiki.lyx.org/Windows/MetafileToEPSConverter | 12:04.22 |
| chrisl | I know nothing about that, sorry | 12:05.33 |
| | bencc1: what is the end result you need? | 12:05.53 |
| bencc1 | chrisl: EMF with non-free fonts -> EPS/SVG/PDF with free fonts | 12:06.35 |
| chrisl | Well, there is no sure way to have that work | 12:07.09 |
| | If you just need EMF with non-free fonts -> EPS/SVG/PDF without non-free fonts then there could be a solution. | 12:07.50 |
| bencc1 | how? | 12:08.14 |
| chrisl | If you have a recent version of Ghostscript you can convert the EPS to PDF with pdfwrite and use the -dNoOutputFonts option, and you'll get a PDF with the text degenerated into normal marking operations | 12:10.04 |
| bencc1 | interesting | 12:10.52 |
| | let me try | 12:11.03 |
| chrisl | Depending on the content, the result maybe a larger and a bit slower to render (using fonts allows optimisations, hence why they're used), but it works around issues like this | 12:11.25 |
| bencc1 | with the ps2pdf command? | 12:11.39 |
| chrisl | It's generally preferable to run Ghostscript explicitly | 12:12.38 |
| | bencc1: actually, look at the way your EPS is constructed, there really is *no* chance of replacing the embedded font with another one | 12:13.42 |
| | s/look/looking | 12:13.49 |
| bencc1 | chrisl: why? | 12:14.47 |
| | gs -sDEVICE=pdfwrite -dNoOutputFonts -o david.pdf david.eps | 12:15.43 |
| | this seems to remove the David font from the pdf | 12:15.53 |
| | maybe it just convert the font to paths? | 12:16.13 |
| chrisl | I *think* it converts to vectors - I wasn't *sure* it didn't render to bitmaps, hence why I hedged a bit | 12:16.50 |
| bencc1 | so it's not what I'm looking for | 12:17.40 |
| chrisl | As to why replacing the embedded font will never work: again, unless you know Postscript, it may not make sense to you, but the file uses the "glyphshow" operator to directly render specific glyph names from the font - glyph names are *specific* to this font. | 12:17.49 |
| bencc1 | no way to translate glyph names between two fonts? | 12:19.08 |
| | maybe using a map? | 12:19.14 |
| chrisl | You could do that, in Postscript | 12:19.57 |
| bencc1 | I need to generate the map myself? | 12:20.39 |
| | or does Postscript has utils to do it? | 12:20.51 |
| chrisl | You have to do it yourself. You need to know what each glyph name in the current font means, and what the equivalent name is in the alternative font is | 12:21.36 |
| bencc1 | ok | 12:22.07 |
| chrisl | BTW, what type of font is the original? | 12:22.50 |
| bencc1 | David | 12:24.03 |
| | I don't mind buying it but the license is weird | 12:24.19 |
| | not practical | 12:24.26 |
| | there is david libre but the size is not the same | 12:24.40 |
| chrisl | That's not a font type - truetype, OTF, Type 1, etc? | 12:24.42 |
| bencc1 | this is the original | 12:24.55 |
| | https://www.microsoft.com/typography/fonts/family.aspx?FID=234 | 12:24.56 |
| | ttf | 12:24.58 |
| | truetype | 12:25.03 |
| chrisl | Well, it's been converted to Type 1 in the EPS, and any license or copyright info dropped - which isn't terribly good | 12:26.30 |
| bencc1 | there must be a way to replace the font | 12:30.08 |
| | must be a way to replace equivalent glyphs in two fonts | 12:30.32 |
| chrisl | There may be ways, if you know enough, and have enough time. | 12:31.50 |
| bencc1 | I will invest the needed time | 12:32.42 |
| | I just need a starting point | 12:34.50 |
| chrisl | Well, you need to remove the definition of the font from the EPS, then remove all the inline glyph definitions. Then change the EPS to load your alternate font, then change each original glyph name to the glyph name appropriate for the new font | 12:35.52 |
| bencc1 | thanks | 12:36.12 |
| | the hardest part might be to translate the glyph names | 12:36.23 |
| chrisl | That is certainly the most labour intensive part. And of course, this only works for this font in this file. | 12:37.12 |
| | Here's a thought: AIUI, an EMF doesn't contain a font, just a reference to a font (or font file). It might be easier to address this at the EMF stage, rather than the EPS stage | 12:38.53 |
| bencc1 | chrisl: I think that EMF point the a glyph by index in the font (not sure) | 12:41.37 |
| | in that case replace the font in EMF won't be easy | 12:41.38 |
| | if I'm removing David.ttf from Windows and opening the original EMF file, I see random symbols | 12:42.10 |
| | instead of a nice font substitution | 12:42.17 |
| chrisl | What if you replace David.ttf with your intended substitute? | 12:42.36 |
| bencc1 | how? | 12:42.50 |
| chrisl | Rename the file | 12:42.59 |
| bencc1 | just renaming the file name will do nothing | 12:43.02 |
| | I tried renaming the font in with ttx. still wrong symbols | 12:43.25 |
| | EMF use symbol index. the replacement has different index for the same symbol | 12:43.55 |
| chrisl | Ah, well, no chance | 12:44.19 |
| bencc1 | https://fonts.google.com/specimen/David+Libre | 12:44.25 |
| | that's what I was trying as a replacement | 12:44.34 |
| chrisl | Basically, this is case of: "if you want to get there, don't start from here" | 12:45.54 |
| bencc1 | not sure I understand :) | 12:47.24 |
| chrisl | The right way to do this is to get the original document, and change the font in that. | 12:47.55 |
| bencc1 | in EMF? | 12:48.33 |
| | for me the original is EMF | 12:48.47 |
| | I don't have access to anything else | 12:48.53 |
| chrisl | No, the EMF is *not* the original document | 12:49.12 |
| bencc1 | I know but that's the best I have | 12:50.36 |
| | I have EMF in PowerPoint | 12:50.45 |
| | when embedding fonts in PowerPoint it doesn't embed EMF fonts | 12:50.59 |
| | otherwise I could just use the embedded font which is ok in terms of license | 12:51.15 |
| | I'm trying to see where is the actual code in http://wiki.lyx.org/uploads/Windows/metafile2eps/metafile2eps-source.zip | 12:51.29 |
| | but I don't understand what actually changes emf to eps | 12:51.48 |
| | maybe it just "print" the file? | 12:51.55 |
| chrisl | I think it does just that, yes | 12:52.06 |
| bencc1 | so I probably can't tell the printer to use a different font | 12:53.13 |
| | it will still get confused by the glyph index | 12:53.27 |
| chrisl | Yes | 12:53.40 |
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