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[font] Add failing test amongst font-func parallels infinite-looping 

Reported by Nona while updating Android to HarfBuzz 2.0.0.
This commit is contained in:
Behdad Esfahbod 2018-10-19 19:01:01 -07:00
parent 29d877518f
commit 77d5c3df07
1 changed files with 64 additions and 0 deletions
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64
test/api/test-font.c
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@ -364,6 +364,69 @@ test_fontfuncs_subclassing (void)
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_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;
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_codepoint_t glyph;
hb_font_get_nominal_glyph (font2, 0x0020u, &glyph);
}
static void
test_font_empty (void)
@ -543,6 +606,7 @@ main (int argc, char **argv)
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);