Bind hb_style_get_value APIs

harfbuzz · Dec 3, 2024 · b93ba76 · b93ba76
1 parent 01bebae
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diff --git a/src/uharfbuzz/_harfbuzz.pyx b/src/uharfbuzz/_harfbuzz.pyx
@@ -1094,6 +1094,13 @@ class OTMetricsTag(IntEnum):
     UNDERLINE_SIZE = HB_OT_METRICS_TAG_UNDERLINE_SIZE
     UNDERLINE_OFFSET = HB_OT_METRICS_TAG_UNDERLINE_OFFSET
 
+class StyleTag(IntEnum):
+    ITALIC = HB_STYLE_TAG_ITALIC
+    OPTICAL_SIZE = HB_STYLE_TAG_OPTICAL_SIZE
+    SLANT_ANGLE = HB_STYLE_TAG_SLANT_ANGLE
+    SLANT_RATIO = HB_STYLE_TAG_SLANT_RATIO
+    WIDTH = HB_STYLE_TAG_WIDTH
+    WEIGHT = HB_STYLE_TAG_WEIGHT
 
 cdef class Font:
     cdef hb_font_t* _hb_font
@@ -1574,6 +1581,9 @@ cdef class Font:
         else:
             return None
 
+    # style
+    def get_style_value(self, tag: StyleTag) -> float:
+        return hb_style_get_value(self._hb_font, tag)
 
 cdef struct _pen_methods:
     void *moveTo

diff --git a/src/uharfbuzz/charfbuzz.pxd b/src/uharfbuzz/charfbuzz.pxd
@@ -891,6 +891,15 @@ cdef extern from "hb.h":
     hb_bool_t hb_set_previous_range(const hb_set_t* set, hb_codepoint_t* first, hb_codepoint_t* last)
     unsigned int hb_set_next_many(const hb_set_t* set, hb_codepoint_t codepoint, hb_codepoint_t* out, unsigned int size)
 
+    # hb-style.h
+    ctypedef enum hb_style_tag_t:
+        HB_STYLE_TAG_ITALIC
+        HB_STYLE_TAG_OPTICAL_SIZE
+        HB_STYLE_TAG_SLANT_ANGLE
+        HB_STYLE_TAG_SLANT_RATIO
+        HB_STYLE_TAG_WIDTH
+        HB_STYLE_TAG_WEIGHT
+    float hb_style_get_value(hb_font_t *font, hb_style_tag_t style_tag)
 
 cdef extern from "hb-ot.h":
     # hb-ot-layout.h

diff --git a/tests/test_uharfbuzz.py b/tests/test_uharfbuzz.py
@@ -904,6 +904,15 @@ def test_get_layout_baseline(
         value = blankfont.get_layout_baseline(baseline_tag, direction, script_tag, "")
         assert value == expected_value
 
+    def test_get_style_value(
+        self, blankfont
+    ):
+        assert blankfont.get_style_value(hb.StyleTag.ITALIC) == 0.0
+        assert blankfont.get_style_value(hb.StyleTag.OPTICAL_SIZE) == 12.0
+        assert blankfont.get_style_value(hb.StyleTag.SLANT_ANGLE) == 0.0
+        assert blankfont.get_style_value(hb.StyleTag.SLANT_RATIO) == -0.0
+        assert blankfont.get_style_value(hb.StyleTag.WIDTH) == 100.0
+        assert blankfont.get_style_value(hb.StyleTag.WEIGHT) == 400.0
 
 class TestShape:
     @pytest.mark.parametrize(