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rogueviz:: presentation:: allow pre-rendered LaTeX

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Zeno Rogue 2022-08-07 03:13:05 +02:00
parent f38da4cba9
commit 0265f76c69
1 changed files with 23 additions and 6 deletions
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29
rogueviz/presentation.cpp
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@ -182,11 +182,15 @@ string latex_packages =
"\\definecolor{remph}{rgb}{0,0.5,0}\n" "\\definecolor{remph}{rgb}{0,0.5,0}\n"
"\\renewcommand{\\labelitemi}{{\\color{remph}$\\blacktriangleright$}}\n"; "\\renewcommand{\\labelitemi}{{\\color{remph}$\\blacktriangleright$}}\n";
/* note: you pdftopng from the xpdf package for this to work! */ string latex_cachename(string s, flagtype flags) {
string gen_latex(presmode mode, string s, int res, flagtype flags) {
unsigned hash = 0; unsigned hash = 0;
for(char c: latex_packages + s) hash = (hash << 3) ^ hash ^ c ^ flags; for(char c: latex_packages + s) hash = (hash << 3) ^ hash ^ c ^ flags;
string filename = format("latex-cache/%08X.png", hash); return format("latex-cache/%08X.png", hash);
}
/* note: you pdftopng from the xpdf package for this to work! */
string gen_latex(presmode mode, string s, int res, flagtype flags) {
string filename = latex_cachename(s, flags);
if(mode == pmStartAll) { if(mode == pmStartAll) {
if(!file_exists(filename)) { if(!file_exists(filename)) {
hr::ignore(system("mkdir latex-cache")); hr::ignore(system("mkdir latex-cache"));
@ -268,10 +272,23 @@ void dialog_add_latex(string s, color_t col, int size, flagtype flags) {
}); });
} }
bool rv_latex = false; /** possible values:
* 0 = never display latex
* 1 = if a file exists in the cache, use it
* 2 = otherwise, use pdflatex and xpdf to generate it
*/
int rv_latex = 1;
map<string, bool> file_exists_cache;
void dialog_may_latex(string latex, string normal, color_t col, int size, flagtype flags) { void dialog_may_latex(string latex, string normal, color_t col, int size, flagtype flags) {
if(rv_latex) { bool use_latex = rv_latex == 2;
if(rv_latex == 1) {
string filename = latex_cachename(latex, flags);
if(!file_exists_cache.count(filename)) file_exists_cache[filename] = file_exists(filename);
if(file_exists_cache[filename]) use_latex = true;
}
if(use_latex) {
if(flags & LATEX_COLOR) col = 0xFFFFFFFF; if(flags & LATEX_COLOR) col = 0xFFFFFFFF;
dialog_add_latex(latex, (col << 8) | 0xFF, size * 3/2, flags); dialog_add_latex(latex, (col << 8) | 0xFF, size * 3/2, flags);
} }
@ -386,7 +403,7 @@ void choose_presentation() {
int phooks = int phooks =
0 0
+ addHook(hooks_configfile, 100, [] { + addHook(hooks_configfile, 100, [] {
param_b(rv_latex, "rv_latex"); param_i(rv_latex, "rv_latex");
}) })
+ addHook(dialog::hooks_display_dialog, 100, [] () { + addHook(dialog::hooks_display_dialog, 100, [] () {
if(current_screen_cfunction() == showStartMenu) { if(current_screen_cfunction() == showStartMenu) {