我已经阅读了许多有关将PDF（转换为带有ghostscript）的字体转换为图像时的字体问题的stackoverflow问题。
因为您没有嵌入字体，所以Ghostscript会尝试在系统中查找替代字体并提供更好的呈现方式。
但是我不明白为什么我的MacOSX Preview可以完美呈现PDF，而ghostscript无法呈现。
gs -sFONTPATH=/Library/Fonts -sDEVICE=pngalpha -o file-%03d.png -r144 my.pdf
我什至告诉gs字体在哪里。
这是输出。
$ pdffonts cv18.pdf
Fontconfig warning: "/usr/local/etc/fonts/fonts.conf", line 86: unknown element "blank"
name type encoding emb sub uni object ID
------------------------------------ ----------------- ---------------- --- --- --- ---------
CenturyGothic,Bold TrueType WinAnsi no no no 13 0
CenturyGothic TrueType WinAnsi no no no 14 0
CourierNew TrueType WinAnsi no no no 15 0
Arial TrueType WinAnsi no no no 16 0
AYTOPC+Wingdings TrueType WinAnsi yes yes no 17 0
TimesNewRoman TrueType WinAnsi no no no 18 0
CenturyGothic,Italic TrueType WinAnsi no no no 24 0
$ gs -sDEVICE=pngalpha -o file-%03d.png -r300 cv18.pdf
GPL Ghostscript 9.26 (2018-11-20)
Copyright (C) 2018 Artifex Software, Inc. All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Processing pages 1 through 2.
Page 1
Querying operating system for font files...
Substituting font NewCenturySchlbk-Bold for CenturyGothic,Bold.
Loading C059-Bold font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/C059-Bold... 4357236 2918185 2219472 869812 4 done.
Substituting font NewCenturySchlbk-Roman for CenturyGothic.
Loading C059-Roman font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/C059-Roman... 4504148 3145674 2313416 951449 4 done.
Substituting font Courier for CourierNew.
Loading NimbusMonoPS-Regular font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/NimbusMonoPS-Regular... 4731860 3382093 2548760 1140366 4 done.
Can't find (or can't open) font file /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/ArialMT.
Can't find (or can't open) font file ArialMT.
Can't find (or can't open) font file /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/ArialMT.
Can't find (or can't open) font file ArialMT.
Didn't find this font on the system!
Substituting font Helvetica for ArialMT.
Loading NimbusSans-Regular font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/NimbusSans-Regular... 4939372 3576328 2589160 1183936 4 done.
Can't find (or can't open) font file /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/TimesNewRomanPSMT.
Can't find (or can't open) font file TimesNewRomanPSMT.
Can't find (or can't open) font file /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/TimesNewRomanPSMT.
Can't find (or can't open) font file TimesNewRomanPSMT.
Didn't find this font on the system!
Substituting font Times-Roman for TimesNewRomanPSMT.
Loading NimbusRoman-Regular font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/NimbusRoman-Regular... 5196116 3849418 3003064 1540393 4 done.
Page 2
Substituting font NewCenturySchlbk-Roman for CenturyGothic.
Substituting font NewCenturySchlbk-Bold for CenturyGothic,Bold.
Substituting font NewCenturySchlbk-Italic for CenturyGothic,Italic.
Loading C059-Italic font from /usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/C059-Italic... 5504628 4138508 2467960 1088660 4 done.
问题是：为什么MacOSX Preview没有这个问题？从哪里获取字体才能完美呈现？
答案 0 :(得分：0)
我需要查看您的PDF文件才能发表评论，但是在您说“我什至告诉gs字体在哪里”的地方，恐怕这似乎不正确。
Ghostscript反向频道说：
找不到（或无法打开）字体文件/usr/local/Cellar/ghostscript/9.26/share/ghostscript/9.26/Resource/Font/ArialMT。
因此该文件不存在，或者Ghostscript无法打开它，或者它可能以某种方式损坏了。
fontconfig是您唯一用来“告诉gs字体在哪里”的东西吗？因为如果是这样，您实际上并没有告诉Ghostscript任何东西。另请注意fontconfig警告，我不是font config的专家，但我怀疑您可能也希望对此进行整理。
Ghostscript可能会或可能不会使用fontconfig，具体取决于它的构建方式，这显然是我所不知道的。如果您实际上要告诉 Ghostscript 有关字体（而不是fontconfig）的信息，则可能会更好。您需要使用-I（包括）开关来编辑/创建fontmap.GS文件，并告诉Ghostscript在哪里找到它。
您可以在/ ghostscript / Resource / Init中找到示例fontmap.GS
为了提供更多帮助，我需要知道字体文件所在的确切路径，用来告诉Ghostscript字体文件所在位置的方法以及fontmap.GS的确切配置（或无论您使用的是什么）。如果字体文件以某种方式损坏，则PDF文件和字体文件也将很有帮助。我还对ArialMT和C059-Roman字体的格式感到好奇。 PostScript或TrueType字体？