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Merge pull request #485 from josephcsible/pdftoppm

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Fix gen_latex on Debian and Ubuntu
This commit is contained in:
Zeno Rogue
2025-12-11 10:31:31 +01:00
committed by GitHub
parent 48c2b5eff2 dfb71fea22
commit 81b12c7ebf
1 changed files with 8 additions and 5 deletions
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13
rogueviz/presentation.cpp
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@@ -208,7 +208,8 @@ string latex_cachename(string s, flagtype flags) {
return hr::format("latex-cache/%08X.png", hash);
}
/* note: you pdftopng from the xpdf package for this to work! */
/* note: for this to work, you need either pdftopng from the xpdf package,
* or pdftoppm from the poppler-utils package */
string gen_latex(presmode mode, string s, int res, flagtype flags) {
string filename = latex_cachename(s, flags);
if(mode == pmStartAll) {
@@ -225,13 +226,15 @@ string gen_latex(presmode mode, string s, int res, flagtype flags) {
"\\end{document}\n", latex_packages.c_str(), s.c_str());
fclose(f);
hr::ignore(system("cd latex-cache; pdflatex rogueviz-latex.tex"));
bool has_working_pdftopng = system("pdftopng -v > /dev/null 2>&1") == 0;
string pdftopng_command = has_working_pdftopng ? "pdftopng" : "pdftoppm -png";
string pngline =
(flags & LATEX_COLOR) ?
"cd latex-cache; pdftopng -alpha -r " + its(res) + " rogueviz-latex.pdf t"
: "cd latex-cache; pdftopng -r " + its(res) + " rogueviz-latex.pdf t";
(flags & LATEX_COLOR) && has_working_pdftopng ?
"cd latex-cache; " + pdftopng_command + " -alpha -r " + its(res) + " rogueviz-latex.pdf t"
: "cd latex-cache; " + pdftopng_command + " -r " + its(res) + " rogueviz-latex.pdf t";
println(hlog, "calling: ", pngline);
hr::ignore(system(pngline.c_str()));
rename("latex-cache/t-000001.png", filename.c_str());
rename(has_working_pdftopng ? "latex-cache/t-000001.png" : "latex-cache/t-1.png", filename.c_str());
}
}
return filename;