Add a command-line option (--print-parameters) to dump the parameters…

… to stdout

git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@814 d0cd1f9f-072b-0410-8dd7-cf729c803f20

api/baseapi.h

@@ -127,8 +127,6 @@ class TESS_API TessBaseAPI {
    * Or SetVariable("classify_bln_numeric_mode", "1"); to set numeric-only mode.
    * SetVariable may be used before Init, but settings will revert to
    * defaults on End().
-   * TODO(rays) Add a command-line option to dump the parameters to stdout
-   * and add a pointer to it in the FAQ
    *
    * Note: Must be called after Init(). Only works for non-init variables
    * (init variables should be passed to Init()).

api/tesseractmain.cpp

@@ -76,6 +76,7 @@ int main(int argc, char **argv) {
   const char* output = NULL;
   bool noocr = false;
   bool list_langs = false;
+  bool print_parameters = false;
 
   tesseract::PageSegMode pagesegmode = tesseract::PSM_AUTO;
   int arg = 1;
@@ -86,6 +87,9 @@ int main(int argc, char **argv) {
     } else if (strcmp(argv[arg], "-psm") == 0 && arg + 1 < argc) {
       pagesegmode = static_cast<tesseract::PageSegMode>(atoi(argv[arg + 1]));
       ++arg;
+    } else if (strcmp(argv[arg], "--print-parameters") == 0) {
+      noocr = true;
+      print_parameters = true;
     } else if (image == NULL) {
       image = argv[arg];
     } else if (output == NULL) {
@@ -121,6 +125,8 @@ int main(int argc, char **argv) {
     fprintf(stderr, _("  -v --version: version info\n"));
     fprintf(stderr, _("  --list-langs: list available languages for tesseract "
                       "engine\n"));
+    fprintf(stderr, _("  --print-parameters: print tesseract parameters to the "
+                      "stdout\n"));
     exit(1);
   }
 
@@ -150,6 +156,14 @@ int main(int argc, char **argv) {
      exit(0);
   }
 
+  if (print_parameters) {
+     FILE* fout = stdout;
+     fprintf(stdout, _("Tesseract parameters:\n"));
+     api.PrintVariables(fout);
+     api.End();
+     exit(0);
+  }
+
   // We have 2 possible sources of pagesegmode: a config file and
   // the command line. For backwards compatability reasons, the
   // default in tesseract is tesseract::PSM_SINGLE_BLOCK, but the