--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,353 @@
+#ifndef OT_GLYF_VARCOMPOSITEGLYPH_HH
+#define OT_GLYF_VARCOMPOSITEGLYPH_HH
+
+
+#include "../../hb-open-type.hh"
+#include "coord-setter.hh"
+
+
+namespace OT {
+namespace glyf_impl {
+
+
+struct VarCompositeGlyphRecord
+{
+  protected:
+  enum var_composite_glyph_flag_t
+  {
+    USE_MY_METRICS		= 0x0001,
+    AXIS_INDICES_ARE_SHORT	= 0x0002,
+    UNIFORM_SCALE		= 0x0004,
+    HAVE_TRANSLATE_X		= 0x0008,
+    HAVE_TRANSLATE_Y		= 0x0010,
+    HAVE_ROTATION		= 0x0020,
+    HAVE_SCALE_X		= 0x0040,
+    HAVE_SCALE_Y		= 0x0080,
+    HAVE_SKEW_X			= 0x0100,
+    HAVE_SKEW_Y			= 0x0200,
+    HAVE_TCENTER_X		= 0x0400,
+    HAVE_TCENTER_Y		= 0x0800,
+    GID_IS_24			= 0x1000,
+    AXES_HAVE_VARIATION		= 0x2000,
+  };
+
+  public:
+
+  unsigned int get_size () const
+  {
+    unsigned int size = min_size;
+
+    unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 4 : 3;
+    size += numAxes * axis_width;
+
+    // gid
+    size += 2;
+    if (flags & GID_IS_24)		size += 1;
+
+    if (flags & HAVE_TRANSLATE_X)	size += 2;
+    if (flags & HAVE_TRANSLATE_Y)	size += 2;
+    if (flags & HAVE_ROTATION)		size += 2;
+    if (flags & HAVE_SCALE_X)		size += 2;
+    if (flags & HAVE_SCALE_Y)		size += 2;
+    if (flags & HAVE_SKEW_X)		size += 2;
+    if (flags & HAVE_SKEW_Y)		size += 2;
+    if (flags & HAVE_TCENTER_X)		size += 2;
+    if (flags & HAVE_TCENTER_Y)		size += 2;
+
+    return size;
+  }
+
+  bool has_more () const { return true; }
+
+  bool is_use_my_metrics () const { return flags & USE_MY_METRICS; }
+
+  hb_codepoint_t get_gid () const
+  {
+    if (flags & GID_IS_24)
+      return StructAfter<const HBGlyphID24> (numAxes);
+    else
+      return StructAfter<const HBGlyphID16> (numAxes);
+  }
+
+  unsigned get_numAxes () const
+  {
+    return numAxes;
+  }
+
+  unsigned get_num_points () const
+  {
+    unsigned num = 0;
+    if (flags & AXES_HAVE_VARIATION)			num += numAxes;
+    if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y))	num++;
+    if (flags & HAVE_ROTATION)				num++;
+    if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y))		num++;
+    if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y))		num++;
+    if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y))	num++;
+    return num;
+  }
+
+  void transform_points (hb_array_t<contour_point_t> record_points,
+			 contour_point_vector_t &points) const
+  {
+    float matrix[4];
+    contour_point_t trans;
+
+    get_transformation_from_points (record_points, matrix, trans);
+
+    points.transform (matrix);
+    points.translate (trans);
+  }
+
+  static inline void transform (float (&matrix)[4], contour_point_t &trans,
+				float (other)[6])
+  {
+    // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L268
+    float xx1 = other[0];
+    float xy1 = other[1];
+    float yx1 = other[2];
+    float yy1 = other[3];
+    float dx1 = other[4];
+    float dy1 = other[5];
+    float xx2 = matrix[0];
+    float xy2 = matrix[1];
+    float yx2 = matrix[2];
+    float yy2 = matrix[3];
+    float dx2 = trans.x;
+    float dy2 = trans.y;
+
+    matrix[0] = xx1*xx2 + xy1*yx2;
+    matrix[1] = xx1*xy2 + xy1*yy2;
+    matrix[2] = yx1*xx2 + yy1*yx2;
+    matrix[3] = yx1*xy2 + yy1*yy2;
+    trans.x = xx2*dx1 + yx2*dy1 + dx2;
+    trans.y = xy2*dx1 + yy2*dy1 + dy2;
+  }
+
+  static void translate (float (&matrix)[4], contour_point_t &trans,
+			 float translateX, float translateY)
+  {
+    // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L213
+    float other[6] = {1.f, 0.f, 0.f, 1.f, translateX, translateY};
+    transform (matrix, trans, other);
+  }
+
+  static void scale (float (&matrix)[4], contour_point_t &trans,
+		     float scaleX, float scaleY)
+  {
+    // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L224
+    float other[6] = {scaleX, 0.f, 0.f, scaleY, 0.f, 0.f};
+    transform (matrix, trans, other);
+  }
+
+  static void rotate (float (&matrix)[4], contour_point_t &trans,
+		      float rotation)
+  {
+    // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L240
+    rotation = rotation * float (M_PI);
+    float c = cosf (rotation);
+    float s = sinf (rotation);
+    float other[6] = {c, s, -s, c, 0.f, 0.f};
+    transform (matrix, trans, other);
+  }
+
+  static void skew (float (&matrix)[4], contour_point_t &trans,
+		    float skewX, float skewY)
+  {
+    // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L255
+    skewX = skewX * float (M_PI);
+    skewY = skewY * float (M_PI);
+    float other[6] = {1.f, tanf (skewY), tanf (skewX), 1.f, 0.f, 0.f};
+    transform (matrix, trans, other);
+  }
+
+  bool get_points (contour_point_vector_t &points) const
+  {
+    float translateX = 0.f;
+    float translateY = 0.f;
+    float rotation = 0.f;
+    float scaleX = 1.f * (1 << 12);
+    float scaleY = 1.f * (1 << 12);
+    float skewX = 0.f;
+    float skewY = 0.f;
+    float tCenterX = 0.f;
+    float tCenterY = 0.f;
+
+    if (unlikely (!points.resize (points.length + get_num_points ()))) return false;
+
+    unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1;
+    unsigned axes_size = numAxes * axis_width;
+
+    const F2DOT14 *q = (const F2DOT14 *) (axes_size +
+					  (flags & GID_IS_24 ? 3 : 2) +
+					  &StructAfter<const HBUINT8> (numAxes));
+
+    hb_array_t<contour_point_t> rec_points = points.as_array ().sub_array (points.length - get_num_points ());
+
+    unsigned count = numAxes;
+    if (flags & AXES_HAVE_VARIATION)
+    {
+      for (unsigned i = 0; i < count; i++)
+	rec_points[i].x = *q++;
+      rec_points += count;
+    }
+    else
+      q += count;
+
+    const HBUINT16 *p = (const HBUINT16 *) q;
+
+    if (flags & HAVE_TRANSLATE_X)	translateX = * (const FWORD *) p++;
+    if (flags & HAVE_TRANSLATE_Y)	translateY = * (const FWORD *) p++;
+    if (flags & HAVE_ROTATION)		rotation = * (const F2DOT14 *) p++;
+    if (flags & HAVE_SCALE_X)		scaleX = * (const F4DOT12 *) p++;
+    if (flags & HAVE_SCALE_Y)		scaleY = * (const F4DOT12 *) p++;
+    if (flags & HAVE_SKEW_X)		skewX = * (const F2DOT14 *) p++;
+    if (flags & HAVE_SKEW_Y)		skewY = * (const F2DOT14 *) p++;
+    if (flags & HAVE_TCENTER_X)		tCenterX = * (const FWORD *) p++;
+    if (flags & HAVE_TCENTER_Y)		tCenterY = * (const FWORD *) p++;
+
+    if ((flags & UNIFORM_SCALE) && !(flags & HAVE_SCALE_Y))
+      scaleY = scaleX;
+
+    if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y))
+    {
+      rec_points[0].x = translateX;
+      rec_points[0].y = translateY;
+      rec_points++;
+    }
+    if (flags & HAVE_ROTATION)
+    {
+      rec_points[0].x = rotation;
+      rec_points++;
+    }
+    if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y))
+    {
+      rec_points[0].x = scaleX;
+      rec_points[0].y = scaleY;
+      rec_points++;
+    }
+    if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y))
+    {
+      rec_points[0].x = skewX;
+      rec_points[0].y = skewY;
+      rec_points++;
+    }
+    if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y))
+    {
+      rec_points[0].x = tCenterX;
+      rec_points[0].y = tCenterY;
+      rec_points++;
+    }
+    assert (!rec_points);
+
+    return true;
+  }
+
+  void get_transformation_from_points (hb_array_t<contour_point_t> rec_points,
+				       float (&matrix)[4], contour_point_t &trans) const
+  {
+    if (flags & AXES_HAVE_VARIATION)
+      rec_points += numAxes;
+
+    matrix[0] = matrix[3] = 1.f;
+    matrix[1] = matrix[2] = 0.f;
+    trans.init (0.f, 0.f);
+
+    float translateX = 0.f;
+    float translateY = 0.f;
+    float rotation = 0.f;
+    float scaleX = 1.f;
+    float scaleY = 1.f;
+    float skewX = 0.f;
+    float skewY = 0.f;
+    float tCenterX = 0.f;
+    float tCenterY = 0.f;
+
+    if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y))
+    {
+      translateX = rec_points[0].x;
+      translateY = rec_points[0].y;
+      rec_points++;
+    }
+    if (flags & HAVE_ROTATION)
+    {
+      rotation = rec_points[0].x / (1 << 14);
+      rec_points++;
+    }
+    if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y))
+    {
+      scaleX = rec_points[0].x / (1 << 12);
+      scaleY = rec_points[0].y / (1 << 12);
+      rec_points++;
+    }
+    if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y))
+    {
+      skewX = rec_points[0].x / (1 << 14);
+      skewY = rec_points[0].y / (1 << 14);
+      rec_points++;
+    }
+    if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y))
+    {
+      tCenterX = rec_points[0].x;
+      tCenterY = rec_points[0].y;
+      rec_points++;
+    }
+    assert (!rec_points);
+
+    translate (matrix, trans, translateX + tCenterX, translateY + tCenterY);
+    rotate (matrix, trans, rotation);
+    scale (matrix, trans, scaleX, scaleY);
+    skew (matrix, trans, -skewX, skewY);
+    translate (matrix, trans, -tCenterX, -tCenterY);
+  }
+
+  void set_variations (coord_setter_t &setter,
+		       hb_array_t<contour_point_t> rec_points) const
+  {
+    bool have_variations = flags & AXES_HAVE_VARIATION;
+    unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1;
+
+    const HBUINT8  *p = (const HBUINT8 *)  (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2));
+    const HBUINT16 *q = (const HBUINT16 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2));
+
+    const F2DOT14 *a = (const F2DOT14 *) ((HBUINT8 *) (axis_width == 1 ? (p + numAxes) : (HBUINT8 *) (q + numAxes)));
+
+    unsigned count = numAxes;
+    for (unsigned i = 0; i < count; i++)
+    {
+      unsigned axis_index = axis_width == 1 ? (unsigned) *p++ : (unsigned) *q++;
+
+      signed v = have_variations ? rec_points[i].x : *a++;
+
+      v += setter[axis_index];
+      v = hb_clamp (v, -(1<<14), (1<<14));
+      setter[axis_index] = v;
+    }
+  }
+
+  protected:
+  HBUINT16	flags;
+  HBUINT8	numAxes;
+  public:
+  DEFINE_SIZE_MIN (3);
+};
+
+using var_composite_iter_t = composite_iter_tmpl<VarCompositeGlyphRecord>;
+
+struct VarCompositeGlyph
+{
+  const GlyphHeader &header;
+  hb_bytes_t bytes;
+  VarCompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) :
+    header (header_), bytes (bytes_) {}
+
+  var_composite_iter_t iter () const
+  { return var_composite_iter_t (bytes, &StructAfter<VarCompositeGlyphRecord, GlyphHeader> (header)); }
+
+};
+
+
+} /* namespace glyf_impl */
+} /* namespace OT */
+
+
+#endif /* OT_GLYF_VARCOMPOSITEGLYPH_HH */