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harfbuzz/test/api/test-font.c

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/*
* 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)
{
hb_face_t *created_from_empty;
hb_face_t *created_from_null;
g_assert (hb_face_get_empty ());
created_from_empty = hb_face_create (hb_blob_get_empty (), 0);
g_assert (hb_face_get_empty () != created_from_empty);
created_from_null = hb_face_create (NULL, 0);
g_assert (hb_face_get_empty () != created_from_null);
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);
hb_face_destroy (created_from_null);
hb_face_destroy (created_from_empty);
}
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_UNUSED, hb_tag_t tag, void *user_data HB_UNUSED)
{
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;
unsigned int upem = hb_face_get_upem (hb_font_get_face (font));
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, ==, upem);
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);
}
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 HB_UNUSED, void *font_data HB_UNUSED,
hb_codepoint_t glyph, unsigned int point_index HB_UNUSED,
hb_position_t *x, hb_position_t *y,
void *user_data HB_UNUSED)
{
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_UNUSED,
hb_codepoint_t glyph, unsigned int point_index,
hb_position_t *x, hb_position_t *y,
void *user_data HB_UNUSED)
{
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 HB_UNUSED, void *font_data HB_UNUSED,
hb_codepoint_t glyph,
void *user_data HB_UNUSED)
{
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);
/* creating sub-font doesn't make the parent font immutable;
* making a font immutable however makes it's lineage immutable.
*/
font2 = hb_font_create_sub_font (font1);
font3 = hb_font_create_sub_font (font2);
g_assert (!hb_font_is_immutable (font1));
g_assert (!hb_font_is_immutable (font2));
g_assert (!hb_font_is_immutable (font3));
hb_font_make_immutable (font3);
g_assert (hb_font_is_immutable (font1));
g_assert (hb_font_is_immutable (font2));
g_assert (hb_font_is_immutable (font3));
hb_font_destroy (font2);
hb_font_destroy (font3);
font2 = hb_font_create_sub_font (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);
/* setup font3 to override scale */
font3 = hb_font_create_sub_font (font2);
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);
hb_font_destroy (font2);
}
static hb_bool_t
nominal_glyph_func (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t unicode HB_UNUSED,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
*glyph = 0;
return FALSE;
}
static unsigned int
nominal_glyphs_func (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
unsigned int count HB_UNUSED,
const hb_codepoint_t *first_unicode HB_UNUSED,
unsigned int unicode_stride HB_UNUSED,
hb_codepoint_t *first_glyph HB_UNUSED,
unsigned int glyph_stride HB_UNUSED,
void *user_data HB_UNUSED)
{
return 0;
}
static void
test_fontfuncs_parallels (void)
{
hb_blob_t *blob;
hb_face_t *face;
hb_font_funcs_t *ffuncs1;
hb_font_funcs_t *ffuncs2;
hb_font_t *font0;
hb_font_t *font1;
hb_font_t *font2;
hb_codepoint_t glyph;
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);
font0 = hb_font_create (face);
hb_face_destroy (face);
/* setup sub-font1 */
font1 = hb_font_create_sub_font (font0);
hb_font_destroy (font0);
ffuncs1 = hb_font_funcs_create ();
hb_font_funcs_set_nominal_glyph_func (ffuncs1, nominal_glyph_func, NULL, NULL);
hb_font_set_funcs (font1, ffuncs1, NULL, NULL);
hb_font_funcs_destroy (ffuncs1);
/* setup sub-font2 */
font2 = hb_font_create_sub_font (font1);
hb_font_destroy (font1);
ffuncs2 = hb_font_funcs_create ();
hb_font_funcs_set_nominal_glyphs_func (ffuncs1, nominal_glyphs_func, NULL, NULL);
hb_font_set_funcs (font2, ffuncs2, NULL, NULL);
hb_font_funcs_destroy (ffuncs2);
/* Just test that calling get_nominal_glyph doesn't infinite-loop. */
hb_font_get_nominal_glyph (font2, 0x0020u, &glyph);
hb_font_destroy (font2);
}
static void
test_font_empty (void)
{
hb_font_t *created_from_empty;
hb_font_t *created_from_null;
hb_font_t *created_sub_from_null;
g_assert (hb_font_get_empty ());
created_from_empty = hb_font_create (hb_face_get_empty ());
g_assert (hb_font_get_empty () != created_from_empty);
created_from_null = hb_font_create (NULL);
g_assert (hb_font_get_empty () != created_from_null);
created_sub_from_null = hb_font_create_sub_font (NULL);
g_assert (hb_font_get_empty () != created_sub_from_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);
hb_font_destroy (created_sub_from_null);
hb_font_destroy (created_from_null);
hb_font_destroy (created_from_empty);
}
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;
unsigned int upem;
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) == hb_font_get_empty ());
subfont = hb_font_create_sub_font (font);
g_assert (hb_font_get_parent (subfont) == font);
hb_font_set_parent(subfont, NULL);
g_assert (hb_font_get_parent (subfont) == hb_font_get_empty());
hb_font_set_parent(subfont, font);
g_assert (hb_font_get_parent (subfont) == font);
hb_font_set_parent(subfont, NULL);
hb_font_make_immutable (subfont);
g_assert (hb_font_get_parent (subfont) == hb_font_get_empty());
hb_font_set_parent(subfont, font);
g_assert (hb_font_get_parent (subfont) == hb_font_get_empty());
hb_font_destroy (subfont);
/* Check scale */
upem = hb_face_get_upem (hb_font_get_face (font));
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, ==, upem);
x_scale = y_scale = 13;
hb_font_get_scale (font, NULL, &y_scale);
g_assert_cmpint (y_scale, ==, upem);
x_scale = y_scale = 13;
hb_font_get_scale (font, &x_scale, &y_scale);
g_assert_cmpint (x_scale, ==, upem);
g_assert_cmpint (y_scale, ==, upem);
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 ptem */
g_assert_cmpint (hb_font_get_ptem (font), ==, 0);
hb_font_set_ptem (font, 42);
g_assert_cmpint (hb_font_get_ptem (font), ==, 42);
/* 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_fontfuncs_parallels);
hb_test_add (test_font_empty);
hb_test_add (test_font_properties);
return hb_test_run();
}
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