add a lib for rendering text in sdl2 and rules to make in makefile

SDL2_ttf/external/harfbuzz/util/main-font-text.hh

@@ -0,0 +1,104 @@
+/*
+ * Copyright © 2011,2012  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_MAIN_FONT_TEXT_HH
+#define HB_MAIN_FONT_TEXT_HH
+
+#include "options.hh"
+
+/* main() body for utilities taking font and processing text.*/
+
+template <typename consumer_t,
+	  typename font_options_type,
+	  typename text_options_type>
+struct main_font_text_t :
+       option_parser_t,
+       font_options_type,
+       text_options_type,
+       consumer_t
+{
+  int operator () (int argc, char **argv)
+  {
+    add_options ();
+    parse (&argc, &argv);
+
+    this->init (this);
+
+    while (this->consume_line (*this))
+      ;
+
+    this->finish (this);
+
+    return this->failed ? 1 : 0;
+  }
+
+  protected:
+
+  void add_options ()
+  {
+    font_options_type::add_options (this);
+    text_options_type::add_options (this);
+    consumer_t::add_options (this);
+
+    GOptionEntry entries[] =
+    {
+      {G_OPTION_REMAINING,	0, G_OPTION_FLAG_IN_MAIN,
+				G_OPTION_ARG_CALLBACK,	(gpointer) &collect_rest,	nullptr,	"[FONT-FILE] [TEXT]"},
+      {nullptr}
+    };
+    add_main_group (entries, this);
+    option_parser_t::add_options ();
+  }
+
+  private:
+
+  static gboolean
+  collect_rest (const char *name G_GNUC_UNUSED,
+		const char *arg,
+		gpointer    data,
+		GError    **error)
+  {
+    main_font_text_t *thiz = (main_font_text_t *) data;
+
+    if (!thiz->font_file)
+    {
+      thiz->font_file = g_strdup (arg);
+      return true;
+    }
+
+    if (!thiz->text && !thiz->text_file)
+    {
+      thiz->text = g_strdup (arg);
+      return true;
+    }
+
+    g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
+		 "Too many arguments on the command line");
+    return false;
+  }
+};
+
+#endif