--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/hb-draw.hh	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,231 @@
+/*
+ * Copyright © 2020  Ebrahim Byagowi
+ *
+ *  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.
+ */
+
+#ifndef HB_DRAW_HH
+#define HB_DRAW_HH
+
+#include "hb.hh"
+
+
+/*
+ * hb_draw_funcs_t
+ */
+
+#define HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS \
+  HB_DRAW_FUNC_IMPLEMENT (move_to) \
+  HB_DRAW_FUNC_IMPLEMENT (line_to) \
+  HB_DRAW_FUNC_IMPLEMENT (quadratic_to) \
+  HB_DRAW_FUNC_IMPLEMENT (cubic_to) \
+  HB_DRAW_FUNC_IMPLEMENT (close_path) \
+  /* ^--- Add new callbacks here */
+
+struct hb_draw_funcs_t
+{
+  hb_object_header_t header;
+
+  struct {
+#define HB_DRAW_FUNC_IMPLEMENT(name) hb_draw_##name##_func_t name;
+    HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_DRAW_FUNC_IMPLEMENT
+  } func;
+
+  struct {
+#define HB_DRAW_FUNC_IMPLEMENT(name) void *name;
+    HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_DRAW_FUNC_IMPLEMENT
+  } *user_data;
+
+  struct {
+#define HB_DRAW_FUNC_IMPLEMENT(name) hb_destroy_func_t name;
+    HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_DRAW_FUNC_IMPLEMENT
+  } *destroy;
+
+  void emit_move_to (void *draw_data, hb_draw_state_t &st,
+		     float to_x, float to_y)
+  { func.move_to (this, draw_data, &st,
+		  to_x, to_y,
+		  !user_data ? nullptr : user_data->move_to); }
+  void emit_line_to (void *draw_data, hb_draw_state_t &st,
+		     float to_x, float to_y)
+  { func.line_to (this, draw_data, &st,
+		  to_x, to_y,
+		  !user_data ? nullptr : user_data->line_to); }
+  void emit_quadratic_to (void *draw_data, hb_draw_state_t &st,
+			  float control_x, float control_y,
+			  float to_x, float to_y)
+  { func.quadratic_to (this, draw_data, &st,
+		       control_x, control_y,
+		       to_x, to_y,
+		       !user_data ? nullptr : user_data->quadratic_to); }
+  void emit_cubic_to (void *draw_data, hb_draw_state_t &st,
+		      float control1_x, float control1_y,
+		      float control2_x, float control2_y,
+		      float to_x, float to_y)
+  { func.cubic_to (this, draw_data, &st,
+		   control1_x, control1_y,
+		   control2_x, control2_y,
+		   to_x, to_y,
+		   !user_data ? nullptr : user_data->cubic_to); }
+  void emit_close_path (void *draw_data, hb_draw_state_t &st)
+  { func.close_path (this, draw_data, &st,
+		     !user_data ? nullptr : user_data->close_path); }
+
+
+  void move_to (void *draw_data, hb_draw_state_t &st,
+		float to_x, float to_y)
+  {
+    if (st.path_open) close_path (draw_data, st);
+    st.current_x = to_x;
+    st.current_y = to_y;
+  }
+
+  void line_to (void *draw_data, hb_draw_state_t &st,
+		float to_x, float to_y)
+  {
+    if (!st.path_open) start_path (draw_data, st);
+    emit_line_to (draw_data, st, to_x, to_y);
+    st.current_x = to_x;
+    st.current_y = to_y;
+  }
+
+  void
+  quadratic_to (void *draw_data, hb_draw_state_t &st,
+		float control_x, float control_y,
+		float to_x, float to_y)
+  {
+    if (!st.path_open) start_path (draw_data, st);
+    emit_quadratic_to (draw_data, st, control_x, control_y, to_x, to_y);
+    st.current_x = to_x;
+    st.current_y = to_y;
+  }
+
+  void
+  cubic_to (void *draw_data, hb_draw_state_t &st,
+	    float control1_x, float control1_y,
+	    float control2_x, float control2_y,
+	    float to_x, float to_y)
+  {
+    if (!st.path_open) start_path (draw_data, st);
+    emit_cubic_to (draw_data, st, control1_x, control1_y, control2_x, control2_y, to_x, to_y);
+    st.current_x = to_x;
+    st.current_y = to_y;
+  }
+
+  void
+  close_path (void *draw_data, hb_draw_state_t &st)
+  {
+    if (st.path_open)
+    {
+      if ((st.path_start_x != st.current_x) || (st.path_start_y != st.current_y))
+	emit_line_to (draw_data, st, st.path_start_x, st.path_start_y);
+      emit_close_path (draw_data, st);
+    }
+    st.path_open = false;
+    st.path_start_x = st.current_x = st.path_start_y = st.current_y = 0;
+  }
+
+  protected:
+
+  void start_path (void *draw_data, hb_draw_state_t &st)
+  {
+    assert (!st.path_open);
+    emit_move_to (draw_data, st, st.current_x, st.current_y);
+    st.path_open = true;
+    st.path_start_x = st.current_x;
+    st.path_start_y = st.current_y;
+  }
+};
+DECLARE_NULL_INSTANCE (hb_draw_funcs_t);
+
+struct hb_draw_session_t
+{
+  hb_draw_session_t (hb_draw_funcs_t *funcs_, void *draw_data_, float slant_ = 0.f)
+    : slant {slant_}, not_slanted {slant == 0.f},
+      funcs {funcs_}, draw_data {draw_data_}, st HB_DRAW_STATE_DEFAULT
+  {}
+
+  ~hb_draw_session_t () { close_path (); }
+
+  void move_to (float to_x, float to_y)
+  {
+    if (likely (not_slanted))
+      funcs->move_to (draw_data, st,
+		      to_x, to_y);
+    else
+      funcs->move_to (draw_data, st,
+		      to_x + to_y * slant, to_y);
+  }
+  void line_to (float to_x, float to_y)
+  {
+    if (likely (not_slanted))
+      funcs->line_to (draw_data, st,
+		      to_x, to_y);
+    else
+      funcs->line_to (draw_data, st,
+		      to_x + to_y * slant, to_y);
+  }
+  void
+  quadratic_to (float control_x, float control_y,
+		float to_x, float to_y)
+  {
+    if (likely (not_slanted))
+      funcs->quadratic_to (draw_data, st,
+			   control_x, control_y,
+			   to_x, to_y);
+    else
+      funcs->quadratic_to (draw_data, st,
+			   control_x + control_y * slant, control_y,
+			   to_x + to_y * slant, to_y);
+  }
+  void
+  cubic_to (float control1_x, float control1_y,
+	    float control2_x, float control2_y,
+	    float to_x, float to_y)
+  {
+    if (likely (not_slanted))
+      funcs->cubic_to (draw_data, st,
+		       control1_x, control1_y,
+		       control2_x, control2_y,
+		       to_x, to_y);
+    else
+      funcs->cubic_to (draw_data, st,
+		       control1_x + control1_y * slant, control1_y,
+		       control2_x + control2_y * slant, control2_y,
+		       to_x + to_y * slant, to_y);
+  }
+  void close_path ()
+  {
+    funcs->close_path (draw_data, st);
+  }
+
+  protected:
+  float slant;
+  bool not_slanted;
+  hb_draw_funcs_t *funcs;
+  void *draw_data;
+  hb_draw_state_t st;
+};
+
+#endif /* HB_DRAW_HH */