test/api/test-font.c - platform/external/harfbuzz_ng - Git at Google

 /*
  * 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
  */

 #include "hb-test.h"

 /* Unit tests for hb-font.h */


 static const char test_data[] = "test\0data";


 static void
 test_face_empty (void)
 {
   g_assert (hb_face_get_empty ());
   g_assert (hb_face_get_empty () == hb_face_create (hb_blob_get_empty (), 0));
   g_assert (hb_face_get_empty () == hb_face_create (NULL, 0));

   g_assert (hb_face_reference_table (hb_face_get_empty (), HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

   g_assert_cmpint (hb_face_get_upem (hb_face_get_empty ()), ==, 1000);
 }

 static void
 test_face_create (void)
 {
   hb_face_t *face;
   hb_blob_t *blob;

   blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
   face = hb_face_create (blob, 0);
   hb_blob_destroy (blob);

   g_assert (hb_face_reference_table (face, HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

   g_assert_cmpint (hb_face_get_upem (face), ==, 1000);

   hb_face_destroy (face);
 }


 static void
 free_up (void *user_data)
 {
   int *freed = (int *) user_data;

   g_assert (!*freed);

   (*freed)++;
 }

 static hb_blob_t *
 get_table (hb_face_t *face, hb_tag_t tag, void *user_data)
 {
   if (tag == HB_TAG ('a','b','c','d'))
     return hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);

   return hb_blob_get_empty ();
 }

 static void
 test_face_createfortables (void)
 {
   hb_face_t *face;
   hb_blob_t *blob;
   const char *data;
   unsigned int len;
   int freed = 0;

   face = hb_face_create_for_tables (get_table, &freed, free_up);
   g_assert (!freed);

   g_assert (hb_face_reference_table (face, HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

   blob = hb_face_reference_table (face, HB_TAG ('a','b','c','d'));
   g_assert (blob != hb_blob_get_empty ());

   data = hb_blob_get_data (blob, &len);
   g_assert_cmpint (len, ==, sizeof (test_data));
   g_assert (0 == memcmp (data, test_data, sizeof (test_data)));
   hb_blob_destroy (blob);

   g_assert_cmpint (hb_face_get_upem (face), ==, 1000);

   hb_face_destroy (face);
   g_assert (freed);
 }

 static void
 _test_font_nil_funcs (hb_font_t *font)
 {
   hb_codepoint_t glyph;
   hb_position_t x, y;
   hb_glyph_extents_t extents;

   x = y = 13;
   g_assert (!hb_font_get_glyph_contour_point (font, 17, 2, &x, &y));
   g_assert_cmpint (x, ==, 0);
   g_assert_cmpint (y, ==, 0);

   x = hb_font_get_glyph_h_advance (font, 17);
   g_assert_cmpint (x, ==, 0);

   extents.x_bearing = extents.y_bearing = 13;
   extents.width = extents.height = 15;
   hb_font_get_glyph_extents (font, 17, &extents);
   g_assert_cmpint (extents.x_bearing, ==, 0);
   g_assert_cmpint (extents.y_bearing, ==, 0);
   g_assert_cmpint (extents.width, ==, 0);
   g_assert_cmpint (extents.height, ==, 0);

   glyph = 3;
   g_assert (!hb_font_get_glyph (font, 17, 2, &glyph));
   g_assert_cmpint (glyph, ==, 0);

   x = 13;
   x = hb_font_get_glyph_h_kerning (font, 17, 19);
   g_assert_cmpint (x, ==, 0);
 }

 static void
 _test_fontfuncs_nil (hb_font_funcs_t *ffuncs)
 {
   hb_blob_t *blob;
   hb_face_t *face;
   hb_font_t *font;
   hb_font_t *subfont;
   int freed = 0;

   blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
   face = hb_face_create (blob, 0);
   hb_blob_destroy (blob);
   g_assert (!hb_face_is_immutable (face));
   font = hb_font_create (face);
   g_assert (font);
   g_assert (hb_face_is_immutable (face));
   hb_face_destroy (face);


   hb_font_set_funcs (font, ffuncs, &freed, free_up);
   g_assert_cmpint (freed, ==, 0);

   _test_font_nil_funcs (font);

   subfont = hb_font_create_sub_font (font);
   g_assert (subfont);

   g_assert_cmpint (freed, ==, 0);
   hb_font_destroy (font);
   g_assert_cmpint (freed, ==, 0);

   _test_font_nil_funcs (subfont);

   hb_font_destroy (subfont);
   g_assert_cmpint (freed, ==, 1);
 }

 static void
 test_fontfuncs_empty (void)
 {
   g_assert (hb_font_funcs_get_empty ());
   g_assert (hb_font_funcs_is_immutable (hb_font_funcs_get_empty ()));
   _test_fontfuncs_nil (hb_font_funcs_get_empty ());
 }

 static void
 test_fontfuncs_nil (void)
 {
   hb_font_funcs_t *ffuncs;

   ffuncs = hb_font_funcs_create ();

   g_assert (!hb_font_funcs_is_immutable (ffuncs));
   _test_fontfuncs_nil (hb_font_funcs_get_empty ());

   hb_font_funcs_destroy (ffuncs);
 }

 static hb_bool_t
 contour_point_func1 (hb_font_t *font, void *font_data,
 		     hb_codepoint_t glyph, unsigned int point_index,
 		     hb_position_t *x, hb_position_t *y,
 		     void *user_data)
 {
   if (glyph == 1) {
     *x = 2;
     *y = 3;
     return TRUE;
   }
   if (glyph == 2) {
     *x = 4;
     *y = 5;
     return TRUE;
   }

   return FALSE;
 }

 static hb_bool_t
 contour_point_func2 (hb_font_t *font, void *font_data,
 		     hb_codepoint_t glyph, unsigned int point_index,
 		     hb_position_t *x, hb_position_t *y,
 		     void *user_data)
 {
   if (glyph == 1) {
     *x = 6;
     *y = 7;
     return TRUE;
   }

   return hb_font_get_glyph_contour_point (hb_font_get_parent (font),
 					  glyph, point_index, x, y);
 }

 static hb_position_t
 glyph_h_advance_func1 (hb_font_t *font, void *font_data,
 		       hb_codepoint_t glyph,
 		       void *user_data)
 {
   if (glyph == 1)
     return 8;

   return 0;
 }

 static void
 test_fontfuncs_subclassing (void)
 {
   hb_blob_t *blob;
   hb_face_t *face;

   hb_font_funcs_t *ffuncs1;
   hb_font_funcs_t *ffuncs2;

   hb_font_t *font1;
   hb_font_t *font2;
   hb_font_t *font3;

   hb_position_t x;
   hb_position_t y;

   blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
   face = hb_face_create (blob, 0);
   hb_blob_destroy (blob);
   font1 = hb_font_create (face);
   hb_face_destroy (face);
   hb_font_set_scale (font1, 10, 10);

   /* setup font1 */
   ffuncs1 = hb_font_funcs_create ();
   hb_font_funcs_set_glyph_contour_point_func (ffuncs1, contour_point_func1, NULL, NULL);
   hb_font_funcs_set_glyph_h_advance_func (ffuncs1, glyph_h_advance_func1, NULL, NULL);
   hb_font_set_funcs (font1, ffuncs1, NULL, NULL);
   hb_font_funcs_destroy (ffuncs1);

   x = y = 1;
   g_assert (hb_font_get_glyph_contour_point_for_origin (font1, 1, 2, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 2);
   g_assert_cmpint (y, ==, 3);
   g_assert (hb_font_get_glyph_contour_point_for_origin (font1, 2, 5, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 4);
   g_assert_cmpint (y, ==, 5);
   g_assert (!hb_font_get_glyph_contour_point_for_origin (font1, 3, 7, HB_DIRECTION_RTL, &x, &y));
   g_assert_cmpint (x, ==, 0);
   g_assert_cmpint (y, ==, 0);
   x = hb_font_get_glyph_h_advance (font1, 1);
   g_assert_cmpint (x, ==, 8);
   x = hb_font_get_glyph_h_advance (font1, 2);
   g_assert_cmpint (x, ==, 0);


   font2 = hb_font_create_sub_font (font1);
   g_assert (hb_font_is_immutable (font1));
   hb_font_destroy (font1);

   /* setup font2 to override some funcs */
   ffuncs2 = hb_font_funcs_create ();
   hb_font_funcs_set_glyph_contour_point_func (ffuncs2, contour_point_func2, NULL, NULL);
   hb_font_set_funcs (font2, ffuncs2, NULL, NULL);
   hb_font_funcs_destroy (ffuncs2);

   x = y = 1;
   g_assert (hb_font_get_glyph_contour_point_for_origin (font2, 1, 2, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 6);
   g_assert_cmpint (y, ==, 7);
   g_assert (hb_font_get_glyph_contour_point_for_origin (font2, 2, 5, HB_DIRECTION_RTL, &x, &y));
   g_assert_cmpint (x, ==, 4);
   g_assert_cmpint (y, ==, 5);
   g_assert (!hb_font_get_glyph_contour_point_for_origin (font2, 3, 7, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 0);
   g_assert_cmpint (y, ==, 0);
   x = hb_font_get_glyph_h_advance (font2, 1);
   g_assert_cmpint (x, ==, 8);
   x = hb_font_get_glyph_h_advance (font2, 2);
   g_assert_cmpint (x, ==, 0);


   font3 = hb_font_create_sub_font (font2);
   g_assert (hb_font_is_immutable (font2));
   hb_font_destroy (font2);

   /* setup font3 to override scale */
   hb_font_set_scale (font3, 20, 30);

   x = y = 1;
   g_assert (hb_font_get_glyph_contour_point_for_origin (font3, 1, 2, HB_DIRECTION_RTL, &x, &y));
   g_assert_cmpint (x, ==, 6*2);
   g_assert_cmpint (y, ==, 7*3);
   g_assert (hb_font_get_glyph_contour_point_for_origin (font3, 2, 5, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 4*2);
   g_assert_cmpint (y, ==, 5*3);
   g_assert (!hb_font_get_glyph_contour_point_for_origin (font3, 3, 7, HB_DIRECTION_LTR, &x, &y));
   g_assert_cmpint (x, ==, 0*2);
   g_assert_cmpint (y, ==, 0*3);
   x = hb_font_get_glyph_h_advance (font3, 1);
   g_assert_cmpint (x, ==, 8*2);
   x = hb_font_get_glyph_h_advance (font3, 2);
   g_assert_cmpint (x, ==, 0*2);


   hb_font_destroy (font3);
 }


 static void
 test_font_empty (void)
 {
   g_assert (hb_font_get_empty ());
   g_assert (hb_font_get_empty () == hb_font_create (hb_face_get_empty ()));
   g_assert (hb_font_get_empty () == hb_font_create (NULL));
   g_assert (hb_font_get_empty () == hb_font_create_sub_font (NULL));
   g_assert (hb_font_is_immutable (hb_font_get_empty ()));

   g_assert (hb_font_get_face (hb_font_get_empty ()) == hb_face_get_empty ());
   g_assert (hb_font_get_parent (hb_font_get_empty ()) == NULL);
 }

 static void
 test_font_properties (void)
 {
   hb_blob_t *blob;
   hb_face_t *face;
   hb_font_t *font;
   hb_font_t *subfont;
   int x_scale, y_scale;
   unsigned int x_ppem, y_ppem;

   blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
   face = hb_face_create (blob, 0);
   hb_blob_destroy (blob);
   font = hb_font_create (face);
   hb_face_destroy (face);


   g_assert (hb_font_get_face (font) == face);
   g_assert (hb_font_get_parent (font) == NULL);


   /* Check scale */

   hb_font_get_scale (font, NULL, NULL);
   x_scale = y_scale = 13;
   hb_font_get_scale (font, &x_scale, NULL);
   g_assert_cmpint (x_scale, ==, 0);
   x_scale = y_scale = 13;
   hb_font_get_scale (font, NULL, &y_scale);
   g_assert_cmpint (y_scale, ==, 0);
   x_scale = y_scale = 13;
   hb_font_get_scale (font, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 0);
   g_assert_cmpint (y_scale, ==, 0);

   hb_font_set_scale (font, 17, 19);

   x_scale = y_scale = 13;
   hb_font_get_scale (font, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 17);
   g_assert_cmpint (y_scale, ==, 19);


   /* Check ppem */

   hb_font_get_ppem (font, NULL, NULL);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, &x_ppem, NULL);
   g_assert_cmpint (x_ppem, ==, 0);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, NULL, &y_ppem);
   g_assert_cmpint (y_ppem, ==, 0);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 0);
   g_assert_cmpint (y_ppem, ==, 0);

   hb_font_set_ppem (font, 17, 19);

   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 17);
   g_assert_cmpint (y_ppem, ==, 19);


   /* Check immutable */

   g_assert (!hb_font_is_immutable (font));
   hb_font_make_immutable (font);
   g_assert (hb_font_is_immutable (font));

   hb_font_set_scale (font, 10, 12);
   x_scale = y_scale = 13;
   hb_font_get_scale (font, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 17);
   g_assert_cmpint (y_scale, ==, 19);

   hb_font_set_ppem (font, 10, 12);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 17);
   g_assert_cmpint (y_ppem, ==, 19);


   /* sub_font now */
   subfont = hb_font_create_sub_font (font);
   hb_font_destroy (font);

   g_assert (hb_font_get_parent (subfont) == font);
   g_assert (hb_font_get_face (subfont) == face);

   /* scale */
   x_scale = y_scale = 13;
   hb_font_get_scale (subfont, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 17);
   g_assert_cmpint (y_scale, ==, 19);
   hb_font_set_scale (subfont, 10, 12);
   x_scale = y_scale = 13;
   hb_font_get_scale (subfont, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 10);
   g_assert_cmpint (y_scale, ==, 12);
   x_scale = y_scale = 13;
   hb_font_get_scale (font, &x_scale, &y_scale);
   g_assert_cmpint (x_scale, ==, 17);
   g_assert_cmpint (y_scale, ==, 19);

   /* ppem */
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (subfont, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 17);
   g_assert_cmpint (y_ppem, ==, 19);
   hb_font_set_ppem (subfont, 10, 12);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (subfont, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 10);
   g_assert_cmpint (y_ppem, ==, 12);
   x_ppem = y_ppem = 13;
   hb_font_get_ppem (font, &x_ppem, &y_ppem);
   g_assert_cmpint (x_ppem, ==, 17);
   g_assert_cmpint (y_ppem, ==, 19);

   hb_font_destroy (subfont);
 }

 int
 main (int argc, char **argv)
 {
   hb_test_init (&argc, &argv);

   hb_test_add (test_face_empty);
   hb_test_add (test_face_create);
   hb_test_add (test_face_createfortables);

   hb_test_add (test_fontfuncs_empty);
   hb_test_add (test_fontfuncs_nil);
   hb_test_add (test_fontfuncs_subclassing);

   hb_test_add (test_font_empty);
   hb_test_add (test_font_properties);

   return hb_test_run();
 }
	/*
	* 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
	*/

	#include "hb-test.h"

	/* Unit tests for hb-font.h */


	static const char test_data[] = "test\0data";


	static void
	test_face_empty (void)
	{
	g_assert (hb_face_get_empty ());
	g_assert (hb_face_get_empty () == hb_face_create (hb_blob_get_empty (), 0));
	g_assert (hb_face_get_empty () == hb_face_create (NULL, 0));

	g_assert (hb_face_reference_table (hb_face_get_empty (), HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

	g_assert_cmpint (hb_face_get_upem (hb_face_get_empty ()), ==, 1000);
	}

	static void
	test_face_create (void)
	{
	hb_face_t *face;
	hb_blob_t *blob;

	blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
	face = hb_face_create (blob, 0);
	hb_blob_destroy (blob);

	g_assert (hb_face_reference_table (face, HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

	g_assert_cmpint (hb_face_get_upem (face), ==, 1000);

	hb_face_destroy (face);
	}


	static void
	free_up (void *user_data)
	{
	int freed = (int ) user_data;

	g_assert (!*freed);

	(*freed)++;
	}

	static hb_blob_t *
	get_table (hb_face_t face, hb_tag_t tag, void user_data)
	{
	if (tag == HB_TAG ('a','b','c','d'))
	return hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);

	return hb_blob_get_empty ();
	}

	static void
	test_face_createfortables (void)
	{
	hb_face_t *face;
	hb_blob_t *blob;
	const char *data;
	unsigned int len;
	int freed = 0;

	face = hb_face_create_for_tables (get_table, &freed, free_up);
	g_assert (!freed);

	g_assert (hb_face_reference_table (face, HB_TAG ('h','e','a','d')) == hb_blob_get_empty ());

	blob = hb_face_reference_table (face, HB_TAG ('a','b','c','d'));
	g_assert (blob != hb_blob_get_empty ());

	data = hb_blob_get_data (blob, &len);
	g_assert_cmpint (len, ==, sizeof (test_data));
	g_assert (0 == memcmp (data, test_data, sizeof (test_data)));
	hb_blob_destroy (blob);

	g_assert_cmpint (hb_face_get_upem (face), ==, 1000);

	hb_face_destroy (face);
	g_assert (freed);
	}

	static void
	_test_font_nil_funcs (hb_font_t *font)
	{
	hb_codepoint_t glyph;
	hb_position_t x, y;
	hb_glyph_extents_t extents;

	x = y = 13;
	g_assert (!hb_font_get_glyph_contour_point (font, 17, 2, &x, &y));
	g_assert_cmpint (x, ==, 0);
	g_assert_cmpint (y, ==, 0);

	x = hb_font_get_glyph_h_advance (font, 17);
	g_assert_cmpint (x, ==, 0);

	extents.x_bearing = extents.y_bearing = 13;
	extents.width = extents.height = 15;
	hb_font_get_glyph_extents (font, 17, &extents);
	g_assert_cmpint (extents.x_bearing, ==, 0);
	g_assert_cmpint (extents.y_bearing, ==, 0);
	g_assert_cmpint (extents.width, ==, 0);
	g_assert_cmpint (extents.height, ==, 0);

	glyph = 3;
	g_assert (!hb_font_get_glyph (font, 17, 2, &glyph));
	g_assert_cmpint (glyph, ==, 0);

	x = 13;
	x = hb_font_get_glyph_h_kerning (font, 17, 19);
	g_assert_cmpint (x, ==, 0);
	}

	static void
	_test_fontfuncs_nil (hb_font_funcs_t *ffuncs)
	{
	hb_blob_t *blob;
	hb_face_t *face;
	hb_font_t *font;
	hb_font_t *subfont;
	int freed = 0;

	blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
	face = hb_face_create (blob, 0);
	hb_blob_destroy (blob);
	g_assert (!hb_face_is_immutable (face));
	font = hb_font_create (face);
	g_assert (font);
	g_assert (hb_face_is_immutable (face));
	hb_face_destroy (face);


	hb_font_set_funcs (font, ffuncs, &freed, free_up);
	g_assert_cmpint (freed, ==, 0);

	_test_font_nil_funcs (font);

	subfont = hb_font_create_sub_font (font);
	g_assert (subfont);

	g_assert_cmpint (freed, ==, 0);
	hb_font_destroy (font);
	g_assert_cmpint (freed, ==, 0);

	_test_font_nil_funcs (subfont);

	hb_font_destroy (subfont);
	g_assert_cmpint (freed, ==, 1);
	}

	static void
	test_fontfuncs_empty (void)
	{
	g_assert (hb_font_funcs_get_empty ());
	g_assert (hb_font_funcs_is_immutable (hb_font_funcs_get_empty ()));
	_test_fontfuncs_nil (hb_font_funcs_get_empty ());
	}

	static void
	test_fontfuncs_nil (void)
	{
	hb_font_funcs_t *ffuncs;

	ffuncs = hb_font_funcs_create ();

	g_assert (!hb_font_funcs_is_immutable (ffuncs));
	_test_fontfuncs_nil (hb_font_funcs_get_empty ());

	hb_font_funcs_destroy (ffuncs);
	}

	static hb_bool_t
	contour_point_func1 (hb_font_t font, void font_data,
	hb_codepoint_t glyph, unsigned int point_index,
	hb_position_t x, hb_position_t y,
	void *user_data)
	{
	if (glyph == 1) {
	*x = 2;
	*y = 3;
	return TRUE;
	}
	if (glyph == 2) {
	*x = 4;
	*y = 5;
	return TRUE;
	}

	return FALSE;
	}

	static hb_bool_t
	contour_point_func2 (hb_font_t font, void font_data,
	hb_codepoint_t glyph, unsigned int point_index,
	hb_position_t x, hb_position_t y,
	void *user_data)
	{
	if (glyph == 1) {
	*x = 6;
	*y = 7;
	return TRUE;
	}

	return hb_font_get_glyph_contour_point (hb_font_get_parent (font),
	glyph, point_index, x, y);
	}

	static hb_position_t
	glyph_h_advance_func1 (hb_font_t font, void font_data,
	hb_codepoint_t glyph,
	void *user_data)
	{
	if (glyph == 1)
	return 8;

	return 0;
	}

	static void
	test_fontfuncs_subclassing (void)
	{
	hb_blob_t *blob;
	hb_face_t *face;

	hb_font_funcs_t *ffuncs1;
	hb_font_funcs_t *ffuncs2;

	hb_font_t *font1;
	hb_font_t *font2;
	hb_font_t *font3;

	hb_position_t x;
	hb_position_t y;

	blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
	face = hb_face_create (blob, 0);
	hb_blob_destroy (blob);
	font1 = hb_font_create (face);
	hb_face_destroy (face);
	hb_font_set_scale (font1, 10, 10);

	/* setup font1 */
	ffuncs1 = hb_font_funcs_create ();
	hb_font_funcs_set_glyph_contour_point_func (ffuncs1, contour_point_func1, NULL, NULL);
	hb_font_funcs_set_glyph_h_advance_func (ffuncs1, glyph_h_advance_func1, NULL, NULL);
	hb_font_set_funcs (font1, ffuncs1, NULL, NULL);
	hb_font_funcs_destroy (ffuncs1);

	x = y = 1;
	g_assert (hb_font_get_glyph_contour_point_for_origin (font1, 1, 2, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 2);
	g_assert_cmpint (y, ==, 3);
	g_assert (hb_font_get_glyph_contour_point_for_origin (font1, 2, 5, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 4);
	g_assert_cmpint (y, ==, 5);
	g_assert (!hb_font_get_glyph_contour_point_for_origin (font1, 3, 7, HB_DIRECTION_RTL, &x, &y));
	g_assert_cmpint (x, ==, 0);
	g_assert_cmpint (y, ==, 0);
	x = hb_font_get_glyph_h_advance (font1, 1);
	g_assert_cmpint (x, ==, 8);
	x = hb_font_get_glyph_h_advance (font1, 2);
	g_assert_cmpint (x, ==, 0);


	font2 = hb_font_create_sub_font (font1);
	g_assert (hb_font_is_immutable (font1));
	hb_font_destroy (font1);

	/* setup font2 to override some funcs */
	ffuncs2 = hb_font_funcs_create ();
	hb_font_funcs_set_glyph_contour_point_func (ffuncs2, contour_point_func2, NULL, NULL);
	hb_font_set_funcs (font2, ffuncs2, NULL, NULL);
	hb_font_funcs_destroy (ffuncs2);

	x = y = 1;
	g_assert (hb_font_get_glyph_contour_point_for_origin (font2, 1, 2, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 6);
	g_assert_cmpint (y, ==, 7);
	g_assert (hb_font_get_glyph_contour_point_for_origin (font2, 2, 5, HB_DIRECTION_RTL, &x, &y));
	g_assert_cmpint (x, ==, 4);
	g_assert_cmpint (y, ==, 5);
	g_assert (!hb_font_get_glyph_contour_point_for_origin (font2, 3, 7, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 0);
	g_assert_cmpint (y, ==, 0);
	x = hb_font_get_glyph_h_advance (font2, 1);
	g_assert_cmpint (x, ==, 8);
	x = hb_font_get_glyph_h_advance (font2, 2);
	g_assert_cmpint (x, ==, 0);


	font3 = hb_font_create_sub_font (font2);
	g_assert (hb_font_is_immutable (font2));
	hb_font_destroy (font2);

	/* setup font3 to override scale */
	hb_font_set_scale (font3, 20, 30);

	x = y = 1;
	g_assert (hb_font_get_glyph_contour_point_for_origin (font3, 1, 2, HB_DIRECTION_RTL, &x, &y));
	g_assert_cmpint (x, ==, 6*2);
	g_assert_cmpint (y, ==, 7*3);
	g_assert (hb_font_get_glyph_contour_point_for_origin (font3, 2, 5, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 4*2);
	g_assert_cmpint (y, ==, 5*3);
	g_assert (!hb_font_get_glyph_contour_point_for_origin (font3, 3, 7, HB_DIRECTION_LTR, &x, &y));
	g_assert_cmpint (x, ==, 0*2);
	g_assert_cmpint (y, ==, 0*3);
	x = hb_font_get_glyph_h_advance (font3, 1);
	g_assert_cmpint (x, ==, 8*2);
	x = hb_font_get_glyph_h_advance (font3, 2);
	g_assert_cmpint (x, ==, 0*2);


	hb_font_destroy (font3);
	}


	static void
	test_font_empty (void)
	{
	g_assert (hb_font_get_empty ());
	g_assert (hb_font_get_empty () == hb_font_create (hb_face_get_empty ()));
	g_assert (hb_font_get_empty () == hb_font_create (NULL));
	g_assert (hb_font_get_empty () == hb_font_create_sub_font (NULL));
	g_assert (hb_font_is_immutable (hb_font_get_empty ()));

	g_assert (hb_font_get_face (hb_font_get_empty ()) == hb_face_get_empty ());
	g_assert (hb_font_get_parent (hb_font_get_empty ()) == NULL);
	}

	static void
	test_font_properties (void)
	{
	hb_blob_t *blob;
	hb_face_t *face;
	hb_font_t *font;
	hb_font_t *subfont;
	int x_scale, y_scale;
	unsigned int x_ppem, y_ppem;

	blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
	face = hb_face_create (blob, 0);
	hb_blob_destroy (blob);
	font = hb_font_create (face);
	hb_face_destroy (face);


	g_assert (hb_font_get_face (font) == face);
	g_assert (hb_font_get_parent (font) == NULL);


	/* Check scale */

	hb_font_get_scale (font, NULL, NULL);
	x_scale = y_scale = 13;
	hb_font_get_scale (font, &x_scale, NULL);
	g_assert_cmpint (x_scale, ==, 0);
	x_scale = y_scale = 13;
	hb_font_get_scale (font, NULL, &y_scale);
	g_assert_cmpint (y_scale, ==, 0);
	x_scale = y_scale = 13;
	hb_font_get_scale (font, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 0);
	g_assert_cmpint (y_scale, ==, 0);

	hb_font_set_scale (font, 17, 19);

	x_scale = y_scale = 13;
	hb_font_get_scale (font, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 17);
	g_assert_cmpint (y_scale, ==, 19);


	/* Check ppem */

	hb_font_get_ppem (font, NULL, NULL);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, &x_ppem, NULL);
	g_assert_cmpint (x_ppem, ==, 0);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, NULL, &y_ppem);
	g_assert_cmpint (y_ppem, ==, 0);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 0);
	g_assert_cmpint (y_ppem, ==, 0);

	hb_font_set_ppem (font, 17, 19);

	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 17);
	g_assert_cmpint (y_ppem, ==, 19);


	/* Check immutable */

	g_assert (!hb_font_is_immutable (font));
	hb_font_make_immutable (font);
	g_assert (hb_font_is_immutable (font));

	hb_font_set_scale (font, 10, 12);
	x_scale = y_scale = 13;
	hb_font_get_scale (font, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 17);
	g_assert_cmpint (y_scale, ==, 19);

	hb_font_set_ppem (font, 10, 12);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 17);
	g_assert_cmpint (y_ppem, ==, 19);


	/* sub_font now */
	subfont = hb_font_create_sub_font (font);
	hb_font_destroy (font);

	g_assert (hb_font_get_parent (subfont) == font);
	g_assert (hb_font_get_face (subfont) == face);

	/* scale */
	x_scale = y_scale = 13;
	hb_font_get_scale (subfont, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 17);
	g_assert_cmpint (y_scale, ==, 19);
	hb_font_set_scale (subfont, 10, 12);
	x_scale = y_scale = 13;
	hb_font_get_scale (subfont, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 10);
	g_assert_cmpint (y_scale, ==, 12);
	x_scale = y_scale = 13;
	hb_font_get_scale (font, &x_scale, &y_scale);
	g_assert_cmpint (x_scale, ==, 17);
	g_assert_cmpint (y_scale, ==, 19);

	/* ppem */
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (subfont, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 17);
	g_assert_cmpint (y_ppem, ==, 19);
	hb_font_set_ppem (subfont, 10, 12);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (subfont, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 10);
	g_assert_cmpint (y_ppem, ==, 12);
	x_ppem = y_ppem = 13;
	hb_font_get_ppem (font, &x_ppem, &y_ppem);
	g_assert_cmpint (x_ppem, ==, 17);
	g_assert_cmpint (y_ppem, ==, 19);

	hb_font_destroy (subfont);
	}

	int
	main (int argc, char **argv)
	{
	hb_test_init (&argc, &argv);

	hb_test_add (test_face_empty);
	hb_test_add (test_face_create);
	hb_test_add (test_face_createfortables);

	hb_test_add (test_fontfuncs_empty);
	hb_test_add (test_fontfuncs_nil);
	hb_test_add (test_fontfuncs_subclassing);

	hb_test_add (test_font_empty);
	hb_test_add (test_font_properties);

	return hb_test_run();
	}