now use argv0 to initialize ffw

pdf2htmlEX/src/HTMLRenderer/HTMLRenderer.h

@@ -75,7 +75,7 @@ namespace pdf2htmlEX {
 
 struct HTMLRenderer : OutputDev
 {
-    HTMLRenderer(Param & param);
+    HTMLRenderer(const char* progPath, Param & param);
     virtual ~HTMLRenderer();
 
     void process(PDFDoc * doc);

pdf2htmlEX/src/HTMLRenderer/general.cc

@@ -41,7 +41,7 @@ using std::abs;
 using std::cerr;
 using std::endl;
 
-HTMLRenderer::HTMLRenderer(Param & param)
+HTMLRenderer::HTMLRenderer(const char* progPath, Param & param)
     :OutputDev()
     ,param(param)
     ,html_text_page(param, all_manager)
@@ -56,7 +56,7 @@ HTMLRenderer::HTMLRenderer(Param & param)
         globalParams->setErrQuiet(true);
     }
 
-    ffw_init(param.debug);
+    ffw_init(progPath, param.debug);
 
     cur_mapping.resize(0x10000);
     cur_mapping2.resize(0x100);

pdf2htmlEX/src/pdf2htmlEX.cc

@@ -439,7 +439,7 @@ int main(int argc, char **argv)
         param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
 
 
-        unique_ptr<HTMLRenderer>(new HTMLRenderer(param))->process(doc);
+        unique_ptr<HTMLRenderer>(argv[0], new HTMLRenderer(param))->process(doc);
 
         finished = true;
     }

pdf2htmlEX/src/util/ffw.c

@@ -19,6 +19,7 @@
 #include "SignalHandler.h"
 
 #include "ffw.h"
+#include "gfile.h"
 #include "fontforge-version-extras.h" // needed for FONTFORGE_GIT_VERSION
 #include "fontforge-20190801/autowidth.h"
 #include "fontforge-20190801/bitmapchar.h"
@@ -67,10 +68,11 @@ static void dumb_logwarning(const char * format, ...) { }
 
 static void dumb_post_error(const char * title, const char * error, ...) { }
 
-void ffw_init(int debug)
+void ffw_init(const char* progPath, int debug)
 {
     ffwSetAction("initialize");
-    FindProgDir(NULL);
+    char *localProgPath = strdup(progPath);
+    FindProgDir(localProgPath);
     InitSimpleStuff();
     if ( default_encoding==NULL )
         default_encoding=FindOrMakeEncoding("ISO8859-1");

pdf2htmlEX/src/util/ffw.h

@@ -21,7 +21,7 @@ extern "C" {
 
 ////////////////////////
 // global
-void ffw_init(int debug);
+void ffw_init(const char* progPath, int debug);
 void ffw_finalize(void);
 
 typedef struct ffw_version_info {