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

SDL2_ttf/external/harfbuzz/util/output-options.hh

@@ -0,0 +1,117 @@
+/*
+ * Copyright © 2011  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 OUTPUT_OPTIONS_HH
+#define OUTPUT_OPTIONS_HH
+
+#include "options.hh"
+
+template <bool default_stdout = true>
+struct output_options_t
+{
+  ~output_options_t ()
+  {
+    g_free (output_file);
+    g_free (output_format);
+    if (out_fp && out_fp != stdout)
+      fclose (out_fp);
+  }
+
+  void add_options (option_parser_t *parser,
+		    const char **supported_formats = nullptr)
+  {
+    const char *text = nullptr;
+
+    if (supported_formats)
+    {
+      char *items = g_strjoinv ("/", const_cast<char **> (supported_formats));
+      text = g_strdup_printf ("Set output format\n\n    Supported output formats are: %s", items);
+      g_free (items);
+      parser->free_later ((char *) text);
+    }
+
+    GOptionEntry entries[] =
+    {
+      {"output-file",   'o', 0, G_OPTION_ARG_STRING,	&this->output_file,		"Set output file-name (default: stdout)","filename"},
+      {"output-format", 'O', supported_formats ? 0 : G_OPTION_FLAG_HIDDEN,
+				G_OPTION_ARG_STRING,	&this->output_format,		text,					"format"},
+      {nullptr}
+    };
+    parser->add_group (entries,
+		       "output",
+		       "Output destination & format options:",
+		       "Options for the destination & form of the output",
+		       this);
+  }
+
+  void post_parse (GError **error)
+  {
+    if (output_format)
+      explicit_output_format = true;
+
+    if (output_file && !output_format)
+    {
+      output_format = strrchr (output_file, '.');
+      if (output_format)
+      {
+	  output_format++; /* skip the dot */
+	  output_format = g_strdup (output_format);
+      }
+    }
+
+    if (output_file && 0 != strcmp (output_file, "-"))
+      out_fp = fopen (output_file, "wb");
+    else
+    {
+      if (!default_stdout && !output_file)
+      {
+	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
+		     "No output file was specified");
+        return;
+      }
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+      setmode (fileno (stdout), O_BINARY);
+#endif
+      out_fp = stdout;
+    }
+    if (!out_fp)
+    {
+      g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
+		   "Cannot open output file `%s': %s",
+		   g_filename_display_name (output_file), strerror (errno));
+      return;
+    }
+  }
+
+  char *output_file = nullptr;
+  char *output_format = nullptr;
+
+  bool explicit_output_format = false;
+  FILE *out_fp = nullptr;
+};
+
+#endif