Add -H option

README.md

@@ -6,6 +6,7 @@
 Usage: ./tex3ds [OPTIONS...] <input>
   Options:
     -f, --format <format>        See "Format Options"
+    -H, --header <file>          Output C header to file
     -h, --help                   Show this help message
     -i, --include <file>         Include options from file
     -m, --mipmap <filter>        Generate mipmaps. See "Mipmap Filter Options"

include/subimage.h

@@ -24,6 +24,7 @@
 #include "magick_compat.h"
 #include <string>
 #include <vector>
+#include <libgen.h>
 
 struct SubImage
 {
@@ -35,8 +36,12 @@ struct SubImage
   float       bottom; ///< Bottom v-coordinate
 
   SubImage(size_t index, const std::string &name, float left, float top, float right, float bottom)
-  : index(index), name(name), left(left), top(top), right(right), bottom(bottom)
-  { }
+  : index(index), left(left), top(top), right(right), bottom(bottom)
+  {
+    std::vector<char> path(name.begin(), name.end());
+    path.push_back(0);
+    this->name = ::basename(path.data());
+  }
 
   bool operator<(const SubImage &rhs) const
   {

source/main.cpp

@@ -249,6 +249,9 @@ enum ProcessingMode
   PROCESS_SKYBOX,  ///< Skybox
 };
 
+/** @brief Header path option */
+std::string header_path;
+
 /** @brief Output path option */
 std::string output_path;
 
@@ -1179,6 +1182,70 @@ void write_output_data()
   std::fclose(fp);
 }
 
+/** @brief Sanitize identifier
+ */
+void sanitize_identifier(std::string &id)
+{
+  if(!std::isalnum(id[0]) && id[0] != '_')
+    id.insert(0, 1, '_');
+
+  for(size_t i = 0; i < id.size(); ++i)
+  {
+    if(!std::isalnum(id[i]) && id[i] != '_')
+      id[i] = '_';
+  }
+}
+
+/** @brief Write header
+ */
+void write_header()
+{
+  // check if we need to output the header
+  if(header_path.empty())
+    return;
+
+  FILE *fp = std::fopen(header_path.c_str(), "w");
+  if(!fp)
+    throw std::runtime_error("Failed to open output header");
+
+  std::fprintf(fp, "/* Generated by tex3ds */\n");
+  std::fprintf(fp, "#pragma once\n\n");
+
+  {
+    std::vector<char> path(header_path.begin(), header_path.end());
+    path.push_back(0);
+    header_path = ::basename(path.data());
+  }
+
+  std::string::size_type pos = header_path.rfind('.');
+  if(pos != std::string::npos)
+    header_path.resize(pos);
+
+  sanitize_identifier(header_path);
+
+  for(size_t i = 0; i < subimage_data.size(); ++i)
+  {
+    std::string label = subimage_data[i].name;
+
+    pos = label.rfind('.');
+    if(pos != std::string::npos)
+      label.resize(pos);
+
+    sanitize_identifier(label);
+
+    label += "_idx";
+
+    if(label[0] != '_')
+      label.insert(0, 1, '_');
+
+    std::fprintf(fp, "#define %s%s %zu\n",
+                 header_path.c_str(), label.c_str(), i);
+  }
+
+  // close output header
+  std::fclose(fp);
+}
+
 /** @brief Print version information */
 void print_version()
 {
@@ -1210,6 +1277,7 @@ void print_usage(const char *prog)
   std::printf(
     "  Options:\n"
     "    -f, --format <format>        See \"Format Options\"\n"
+    "    -H, --header <file>          Output C header to file\n"
     "    -h, --help                   Show this help message\n"
     "    -i, --include <file>         Include options from file\n"
     "    -m, --mipmap <filter>        Generate mipmaps. See \"Mipmap Filter Options\"\n"
@@ -1422,7 +1490,7 @@ ParseStatus parseOptions(const std::string &cwd, std::vector<char*> &args)
 
   // parse options
   while((c = ::getopt_long(args.size(), args.data(),
-                           "f:hi:m:o:p:q:rs:vz:", long_options, nullptr)) != -1)
+                           "f:H:hi:m:o:p:q:rs:vz:", long_options, nullptr)) != -1)
   {
     switch(c)
     {
@@ -1456,6 +1524,10 @@ ParseStatus parseOptions(const std::string &cwd, std::vector<char*> &args)
         break;
       }
 
+      case 'H':
+        header_path = getPath(cwd, optarg);
+        break;
+
       case 'h':
         // show help
         print_usage(prog);
@@ -1680,6 +1752,9 @@ int main(int argc, char *argv[])
 
     // write output data
     write_output_data();
+
+    // write header
+    write_header();
   }
   catch(const std::exception &e)
   {