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[test/ot-math] Add a test for the Cambria Math workaround

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This commit is contained in:
Khaled Hosny 2025-04-06 02:22:43 +02:00
parent f57b43c980
commit 2d8e5255f3
2 changed files with 11 additions and 0 deletions
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test/api/fonts/MathTestFontPretendToBeCambria.ttf Normal file
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test/api/test-ot-math.c
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@ -180,6 +180,17 @@ test_get_constant (void)
g_assert_cmpint((hb_ot_math_get_constant (hb_font, HB_OT_MATH_CONSTANT_RADICAL_DEGREE_BOTTOM_RAISE_PERCENT)), ==, 65);
closeFont();
/* https://github.com/harfbuzz/harfbuzz/pull/5250
* The test font pretends to be Cambria Math for the purpose of
* MATH->is_bad_cambria() by having displayOperatorMinHeight set to 2500 and
* delimitedSubFormulaMinHeight set to 3000, and the MATH table padded with
* zeros to be exactly 25722 bytes. When we detect this, we swap the values
* of the two constants. */
openFont("fonts/MathTestFontPretendToBeCambria.ttf");
g_assert_cmpint((hb_ot_math_get_constant (hb_font, HB_OT_MATH_CONSTANT_DISPLAY_OPERATOR_MIN_HEIGHT)), ==, 3000);
g_assert_cmpint((hb_ot_math_get_constant (hb_font, HB_OT_MATH_CONSTANT_DELIMITED_SUB_FORMULA_MIN_HEIGHT)), ==, 2500);
closeFont();
cleanupFreeType();
}