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

SDL2_ttf/external/harfbuzz/docs/meson.build

@@ -0,0 +1,65 @@
+if not find_program('gtkdoc-scan', required: get_option('docs')).found()
+  message('Not building documentation as gtk-doc was not found')
+  subdir_done()
+endif
+
+conf.set('HAVE_GTK_DOC', 1)
+
+gnome = import('gnome')
+
+docconf = configuration_data()
+docconf.set('HB_VERSION', meson.project_version())
+
+version_xml = configure_file(input: 'version.xml.in',
+  output: 'version.xml',
+  configuration: docconf)
+
+content_files = [
+  'usermanual-what-is-harfbuzz.xml',
+  'usermanual-install-harfbuzz.xml',
+  'usermanual-getting-started.xml',
+  'usermanual-glyph-information.xml',
+  'usermanual-shaping-concepts.xml',
+  'usermanual-object-model.xml',
+  'usermanual-buffers-language-script-and-direction.xml',
+  'usermanual-fonts-and-faces.xml',
+  'usermanual-opentype-features.xml',
+  'usermanual-clusters.xml',
+  'usermanual-utilities.xml',
+  'usermanual-integration.xml',
+  version_xml,
+]
+
+html_images = [
+  'HarfBuzz.png',
+  'HarfBuzz.svg',
+]
+
+ignore_headers = [
+  'hb-features.h',
+  'hb-gobject.h',
+  'hb-gobject-enums.h',
+  'hb-gobject-enums-tmp.h',
+  'hb-gobject-structs.h',
+  'hb-wasm-api.h',
+]
+
+gnome.gtkdoc('harfbuzz',
+  main_sgml: 'harfbuzz-docs.xml',
+  src_dir: [meson.current_source_dir() / '..' / 'src',
+            meson.current_build_dir() / '..' / 'src',
+           ],
+  scan_args: ['--deprecated-guards=HB_DISABLE_DEPRECATED',
+              '--ignore-decorators=HB_EXTERN|HB_DEPRECATED|HB_DEPRECATED_FOR()',
+             ],
+  mkdb_args: ['--source-suffixes=h,cc',
+              '--xml-mode',
+              '--output-format=xml',
+             ],
+  content_files: content_files,
+  html_assets: html_images,
+  ignore_headers: ignore_headers,
+  dependencies: [libharfbuzz_dep],
+  install: true,
+  check: get_option('doc_tests'),
+)