Add a basic test for hb-ft api

This tests what would be my minimum assumption
about this api.

test/api/Makefile.am

@@ -145,9 +145,13 @@ test_paint_LDADD += $(FREETYPE_LIBS)
 
 TEST_PROGS += \
 	test-ot-math \
+	test-ft \
 	$(NULL)
 test_ot_math_LDADD = $(LDADD) $(FREETYPE_LIBS)
 test_ot_math_CPPFLAGS = $(AM_CPPFLAGS) $(FREETYPE_CFLAGS)
+
+test_ft_LDADD = $(LDADD) $(FREETYPE_LIBS)
+test_ft_CPPFLAGS = $(AM_CPPFLAGS) $(FREETYPE_CFLAGS)
 endif # HAVE_FREETYPE
 
 # Tests for header compilation

test/api/meson.build

@@ -62,7 +62,10 @@ tests = [
 ]
 
 if conf.get('HAVE_FREETYPE', 0) == 1
-  tests += 'test-ot-math.c'
+  tests += [
+    'test-ot-math.c',
+    'test-ft.c',
+  ]
 endif
 
 if conf.get('HAVE_FREETYPE', 0) == 1 and conf.get('HAVE_PTHREAD', 0) == 1

test/api/test-ft.c

@@ -0,0 +1,120 @@
+/*
+ * Copyright © 2022 Red Hat, 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.
+ *
+ * Author: Matthias Clasen
+ */
+
+
+#include "hb-test.h"
+
+#include "hb-ft.h"
+
+#include FT_FONT_FORMATS_H
+
+static FT_Library ft_library;
+
+static void
+init_freetype (void)
+{
+  FT_Error ft_error;
+  if ((ft_error = FT_Init_FreeType (&ft_library)))
+    abort ();
+}
+
+static void
+cleanup_freetype (void)
+{
+  FT_Done_FreeType (ft_library);
+}
+
+static FT_Face
+get_ft_face (const char *file)
+{
+  FT_Face ft_face;
+
+#if GLIB_CHECK_VERSION(2,37,2)
+  char* path = g_test_build_filename (G_TEST_DIST, file, NULL);
+#else
+  char* path = g_strdup (file);
+#endif
+
+  FT_Error ft_error;
+  if ((ft_error = FT_New_Face (ft_library, path, 0, &ft_face))) {
+    g_free (path);
+    abort();
+  }
+  g_free (path);
+
+  if ((ft_error = FT_Set_Char_Size (ft_face, 2000, 1000, 0, 0)))
+    abort ();
+
+  return ft_face;
+}
+
+static void
+test_native_ft_basic (void)
+{
+  FT_Face ft_face;
+  hb_font_t *font;
+  FT_Face ft_face2;
+
+  init_freetype ();
+
+  ft_face = get_ft_face ("fonts/Cantarell.A.otf");
+
+  g_assert_nonnull (ft_face);
+  g_assert_nonnull (FT_Get_Font_Format (ft_face));
+
+  font = hb_ft_font_create_referenced (ft_face);
+
+  ft_face2 = hb_ft_font_get_face (font);
+
+  g_assert_true (ft_face2 == ft_face);
+
+  ft_face2 = hb_ft_font_lock_face (font);
+
+  g_assert_true (ft_face2 == ft_face);
+
+  hb_ft_font_unlock_face (font);
+
+  hb_ft_font_set_load_flags (font, FT_LOAD_NO_SCALE | FT_LOAD_NO_AUTOHINT);
+  int load_flags = hb_ft_font_get_load_flags (font);
+
+  g_assert_true (load_flags == (FT_LOAD_NO_SCALE | FT_LOAD_NO_AUTOHINT));
+
+  hb_font_destroy (font);
+
+  FT_Done_Face (ft_face);
+
+  cleanup_freetype ();
+}
+
+int
+main (int argc, char **argv)
+{
+  hb_test_init (&argc, &argv);
+
+  hb_test_add (test_native_ft_basic);
+
+  return hb_test_run ();
+}