--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/main.cc	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,532 @@
+/*
+ * Copyright © 2007,2008,2009  Red Hat, Inc.
+ * Copyright © 2018,2019,2020  Ebrahim Byagowi
+ * Copyright © 2018  Khaled Hosny
+ *
+ *  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.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "hb.h"
+#include "hb-ot.h"
+
+#include <cassert>
+#include <cstdlib>
+#include <cstdio>
+#include <cstring>
+
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file_or_fail(x)  hb_blob_get_empty ()
+#endif
+
+#if !defined(HB_NO_COLOR) && !defined(HB_NO_DRAW)
+static void
+svg_dump (hb_face_t *face, unsigned face_index)
+{
+  unsigned glyph_count = hb_face_get_glyph_count (face);
+
+  for (unsigned glyph_id = 0; glyph_id < glyph_count; ++glyph_id)
+  {
+    hb_blob_t *blob = hb_ot_color_glyph_reference_svg (face, glyph_id);
+
+    if (hb_blob_get_length (blob) == 0) continue;
+
+    unsigned length;
+    const char *data = hb_blob_get_data (blob, &length);
+
+    char output_path[255];
+    snprintf (output_path, sizeof output_path,
+	     "out/svg-%u-%u.svg%s",
+	     glyph_id,
+	     face_index,
+	     // append "z" if the content is gzipped, https://stackoverflow.com/a/6059405
+	     (length > 2 && (data[0] == '\x1F') && (data[1] == '\x8B')) ? "z" : "");
+
+    FILE *f = fopen (output_path, "wb");
+    fwrite (data, 1, length, f);
+    fclose (f);
+
+    hb_blob_destroy (blob);
+  }
+}
+
+/* _png API is so easy to use unlike the below code, don't get confused */
+static void
+png_dump (hb_face_t *face, unsigned face_index)
+{
+  unsigned glyph_count = hb_face_get_glyph_count (face);
+  hb_font_t *font = hb_font_create (face);
+
+  /* scans the font for strikes */
+  unsigned sample_glyph_id;
+  /* we don't care about different strikes for different glyphs at this point */
+  for (sample_glyph_id = 0; sample_glyph_id < glyph_count; ++sample_glyph_id)
+  {
+    hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, sample_glyph_id);
+    unsigned blob_length = hb_blob_get_length (blob);
+    hb_blob_destroy (blob);
+    if (blob_length != 0)
+      break;
+  }
+
+  unsigned upem = hb_face_get_upem (face);
+  unsigned blob_length = 0;
+  unsigned strike = 0;
+  for (unsigned ppem = 1; ppem < upem; ++ppem)
+  {
+    hb_font_set_ppem (font, ppem, ppem);
+    hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, sample_glyph_id);
+    unsigned new_blob_length = hb_blob_get_length (blob);
+    hb_blob_destroy (blob);
+    if (new_blob_length != blob_length)
+    {
+      for (unsigned glyph_id = 0; glyph_id < glyph_count; ++glyph_id)
+      {
+	hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, glyph_id);
+
+	if (hb_blob_get_length (blob) == 0) continue;
+
+	unsigned length;
+	const char *data = hb_blob_get_data (blob, &length);
+
+	char output_path[255];
+	snprintf (output_path, sizeof output_path, "out/png-%u-%u-%u.png", glyph_id, strike, face_index);
+
+	FILE *f = fopen (output_path, "wb");
+	fwrite (data, 1, length, f);
+	fclose (f);
+
+	hb_blob_destroy (blob);
+      }
+
+      strike++;
+      blob_length = new_blob_length;
+    }
+  }
+
+  hb_font_destroy (font);
+}
+
+struct draw_data_t
+{
+  FILE *f;
+  hb_position_t ascender;
+};
+
+static void
+move_to (hb_draw_funcs_t *, draw_data_t *draw_data,
+	 hb_draw_state_t *,
+	 float to_x, float to_y,
+	 void *)
+{
+  fprintf (draw_data->f, "M%g,%g", to_x, draw_data->ascender - to_y);
+}
+
+static void
+line_to (hb_draw_funcs_t *, draw_data_t *draw_data,
+	 hb_draw_state_t *,
+	 float to_x, float to_y,
+	 void *)
+{
+  fprintf (draw_data->f, "L%g,%g", to_x, draw_data->ascender - to_y);
+}
+
+static void
+quadratic_to (hb_draw_funcs_t *, draw_data_t *draw_data,
+	      hb_draw_state_t *,
+	      float control_x, float control_y,
+	      float to_x, float to_y,
+	      void *)
+{
+  fprintf (draw_data->f, "Q%g,%g %g,%g", control_x, draw_data->ascender - control_y,
+					to_x, draw_data->ascender - to_y);
+}
+
+static void
+cubic_to (hb_draw_funcs_t *, draw_data_t *draw_data,
+	  hb_draw_state_t *,
+	  float control1_x, float control1_y,
+	  float control2_x, float control2_y,
+	  float to_x, float to_y,
+	  void *)
+{
+  fprintf (draw_data->f, "C%g,%g %g,%g %g,%g", control1_x, draw_data->ascender - control1_y,
+					       control2_x, draw_data->ascender - control2_y,
+					       to_x, draw_data->ascender - to_y);
+}
+
+static void
+close_path (hb_draw_funcs_t *, draw_data_t *draw_data,
+	    hb_draw_state_t *,
+	    void *)
+{
+  fprintf (draw_data->f, "Z");
+}
+
+static void
+layered_glyph_dump (hb_font_t *font, hb_draw_funcs_t *funcs, unsigned face_index)
+{
+  hb_face_t *face = hb_font_get_face (font);
+  unsigned palette_count = hb_ot_color_palette_get_count (face);
+  for (unsigned palette = 0; palette < palette_count; ++palette)
+  {
+    unsigned num_colors = hb_ot_color_palette_get_colors (face, palette, 0, nullptr, nullptr);
+    if (!num_colors) continue;
+
+    hb_color_t *colors = (hb_color_t*) calloc (num_colors, sizeof (hb_color_t));
+    hb_ot_color_palette_get_colors (face, palette, 0, &num_colors, colors);
+    if (!num_colors)
+    {
+      free (colors);
+      continue;
+    }
+
+    unsigned num_glyphs = hb_face_get_glyph_count (face);
+    for (hb_codepoint_t gid = 0; gid < num_glyphs; ++gid)
+    {
+      unsigned num_layers = hb_ot_color_glyph_get_layers (face, gid, 0, nullptr, nullptr);
+      if (!num_layers) continue;
+
+      hb_ot_color_layer_t *layers = (hb_ot_color_layer_t*) malloc (num_layers * sizeof (hb_ot_color_layer_t));
+
+      hb_ot_color_glyph_get_layers (face, gid, 0, &num_layers, layers);
+      if (num_layers)
+      {
+	hb_font_extents_t font_extents;
+	hb_font_get_extents_for_direction (font, HB_DIRECTION_LTR, &font_extents);
+	hb_glyph_extents_t extents = {0};
+	if (!hb_font_get_glyph_extents (font, gid, &extents))
+	{
+	  printf ("Skip gid: %d\n", gid);
+	  continue;
+	}
+
+	char output_path[255];
+	snprintf (output_path, sizeof output_path, "out/colr-%u-%u-%u.svg", gid, palette, face_index);
+	FILE *f = fopen (output_path, "wb");
+	fprintf (f, "<svg xmlns=\"http://www.w3.org/2000/svg\""
+		    " viewBox=\"%d %d %d %d\">\n",
+		    extents.x_bearing, 0,
+		    extents.x_bearing + extents.width, -extents.height);
+	draw_data_t draw_data;
+	draw_data.ascender = extents.y_bearing;
+	draw_data.f = f;
+
+	for (unsigned layer = 0; layer < num_layers; ++layer)
+	{
+	  hb_color_t color = 0x000000FF;
+	  if (layers[layer].color_index != 0xFFFF)
+	    color = colors[layers[layer].color_index];
+	  fprintf (f, "<path fill=\"#%02X%02X%02X\" ",
+		   hb_color_get_red (color), hb_color_get_green (color), hb_color_get_green (color));
+	  if (hb_color_get_alpha (color) != 255)
+	    fprintf (f, "fill-opacity=\"%.3f\"", (double) hb_color_get_alpha (color) / 255.);
+	  fprintf (f, "d=\"");
+	  hb_font_get_glyph_shape (font, layers[layer].glyph, funcs, &draw_data);
+	  fprintf (f, "\"/>\n");
+	}
+
+	fprintf (f, "</svg>");
+	fclose (f);
+      }
+      free (layers);
+    }
+
+    free (colors);
+  }
+}
+
+static void
+dump_glyphs (hb_font_t *font, hb_draw_funcs_t *funcs, unsigned face_index)
+{
+  unsigned num_glyphs = hb_face_get_glyph_count (hb_font_get_face (font));
+  for (unsigned gid = 0; gid < num_glyphs; ++gid)
+  {
+    hb_font_extents_t font_extents;
+    hb_font_get_extents_for_direction (font, HB_DIRECTION_LTR, &font_extents);
+    hb_glyph_extents_t extents = {0};
+    if (!hb_font_get_glyph_extents (font, gid, &extents))
+    {
+      printf ("Skip gid: %d\n", gid);
+      continue;
+    }
+
+    char output_path[255];
+    snprintf (output_path, sizeof output_path, "out/%u-%u.svg", face_index, gid);
+    FILE *f = fopen (output_path, "wb");
+    fprintf (f, "<svg xmlns=\"http://www.w3.org/2000/svg\""
+		" viewBox=\"%d %d %d %d\"><path d=\"",
+		extents.x_bearing, 0,
+		extents.x_bearing + extents.width, font_extents.ascender - font_extents.descender);
+    draw_data_t draw_data;
+    draw_data.ascender = font_extents.ascender;
+    draw_data.f = f;
+    hb_font_get_glyph_shape (font, gid, funcs, &draw_data);
+    fprintf (f, "\"/></svg>");
+    fclose (f);
+  }
+}
+
+static void
+dump_glyphs (hb_blob_t *blob, const char *font_name)
+{
+  FILE *font_name_file = fopen ("out/.dumped_font_name", "r");
+  if (font_name_file)
+  {
+    fprintf (stderr, "Purge or rename ./out folder if you like to run a glyph dump,\n"
+		     "run it like `rm -rf out && mkdir out && src/main font-file.ttf`\n");
+    return;
+  }
+
+  font_name_file = fopen ("out/.dumped_font_name", "w");
+  if (!font_name_file)
+  {
+    fprintf (stderr, "./out is not accessible as a folder, create it please\n");
+    return;
+  }
+  fwrite (font_name, 1, strlen (font_name), font_name_file);
+  fclose (font_name_file);
+
+  hb_draw_funcs_t *funcs = hb_draw_funcs_create ();
+  hb_draw_funcs_set_move_to_func (funcs, (hb_draw_move_to_func_t) move_to, nullptr, nullptr);
+  hb_draw_funcs_set_line_to_func (funcs, (hb_draw_line_to_func_t) line_to, nullptr, nullptr);
+  hb_draw_funcs_set_quadratic_to_func (funcs, (hb_draw_quadratic_to_func_t) quadratic_to, nullptr, nullptr);
+  hb_draw_funcs_set_cubic_to_func (funcs, (hb_draw_cubic_to_func_t) cubic_to, nullptr, nullptr);
+  hb_draw_funcs_set_close_path_func (funcs, (hb_draw_close_path_func_t) close_path, nullptr, nullptr);
+
+  unsigned num_faces = hb_face_count (blob);
+  for (unsigned face_index = 0; face_index < num_faces; ++face_index)
+  {
+    hb_face_t *face = hb_face_create (blob, face_index);
+    hb_font_t *font = hb_font_create (face);
+
+    if (hb_ot_color_has_png (face))
+      printf ("Dumping png (CBDT/sbix)...\n");
+    png_dump (face, face_index);
+
+    if (hb_ot_color_has_svg (face))
+      printf ("Dumping svg (SVG )...\n");
+    svg_dump (face, face_index);
+
+    if (hb_ot_color_has_layers (face) && hb_ot_color_has_palettes (face))
+      printf ("Dumping layered color glyphs (COLR/CPAL)...\n");
+    layered_glyph_dump (font, funcs, face_index);
+
+    dump_glyphs (font, funcs, face_index);
+
+    hb_font_destroy (font);
+    hb_face_destroy (face);
+  }
+
+  hb_draw_funcs_destroy (funcs);
+}
+#endif
+
+#ifndef MAIN_CC_NO_PRIVATE_API
+/* Only this part of this mini app uses private API */
+#include "hb-static.cc"
+#include "hb-open-file.hh"
+#include "hb-ot-layout-gdef-table.hh"
+#include "hb-ot-layout-gsubgpos.hh"
+
+using namespace OT;
+
+static void
+print_layout_info_using_private_api (hb_blob_t *blob)
+{
+  const char *font_data = hb_blob_get_data (blob, nullptr);
+  hb_blob_t *font_blob = hb_sanitize_context_t ().sanitize_blob<OpenTypeFontFile> (blob);
+  const OpenTypeFontFile* sanitized = font_blob->as<OpenTypeFontFile> ();
+  if (!font_blob->data)
+  {
+    printf ("Sanitization of the file wasn't successful. Exit");
+    exit (1);
+  }
+  const OpenTypeFontFile& ot = *sanitized;
+
+  switch (ot.get_tag ())
+  {
+  case OpenTypeFontFile::TrueTypeTag:
+    printf ("OpenType font with TrueType outlines\n");
+    break;
+  case OpenTypeFontFile::CFFTag:
+    printf ("OpenType font with CFF (Type1) outlines\n");
+    break;
+  case OpenTypeFontFile::TTCTag:
+    printf ("TrueType Collection of OpenType fonts\n");
+    break;
+  case OpenTypeFontFile::TrueTag:
+    printf ("Obsolete Apple TrueType font\n");
+    break;
+  case OpenTypeFontFile::Typ1Tag:
+    printf ("Obsolete Apple Type1 font in SFNT container\n");
+    break;
+  case OpenTypeFontFile::DFontTag:
+    printf ("DFont Mac Resource Fork\n");
+    break;
+  default:
+    printf ("Unknown font format\n");
+    break;
+  }
+
+  unsigned num_faces = hb_face_count (blob);
+  printf ("%d font(s) found in file\n", num_faces);
+  for (unsigned n_font = 0; n_font < num_faces; ++n_font)
+  {
+    const OpenTypeFontFace &font = ot.get_face (n_font);
+    printf ("Font %d of %d:\n", n_font, num_faces);
+
+    unsigned num_tables = font.get_table_count ();
+    printf ("  %d table(s) found in font\n", num_tables);
+    for (unsigned n_table = 0; n_table < num_tables; ++n_table)
+    {
+      const OpenTypeTable &table = font.get_table (n_table);
+      printf ("  Table %2d of %2d: %.4s (0x%08x+0x%08x)\n", n_table, num_tables,
+	      (const char *) table.tag,
+	      (unsigned) table.offset,
+	      (unsigned) table.length);
+
+      switch (table.tag)
+      {
+
+      case HB_OT_TAG_GSUB:
+      case HB_OT_TAG_GPOS:
+	{
+
+	const GSUBGPOS &g = *reinterpret_cast<const GSUBGPOS *> (font_data + table.offset);
+
+	unsigned num_scripts = g.get_script_count ();
+	printf ("    %d script(s) found in table\n", num_scripts);
+	for (unsigned n_script = 0; n_script < num_scripts; ++n_script)
+	{
+	  const Script &script = g.get_script (n_script);
+	  printf ("    Script %2d of %2d: %.4s\n", n_script, num_scripts,
+		  (const char *) g.get_script_tag (n_script));
+
+	  if (!script.has_default_lang_sys ())
+	    printf ("      No default language system\n");
+	  int num_langsys = script.get_lang_sys_count ();
+	  printf ("      %d language system(s) found in script\n", num_langsys);
+	  for (int n_langsys = script.has_default_lang_sys () ? -1 : 0; n_langsys < num_langsys; ++n_langsys)
+	  {
+	    const LangSys &langsys = n_langsys == -1
+				   ? script.get_default_lang_sys ()
+				   : script.get_lang_sys (n_langsys);
+	    if (n_langsys == -1)
+	      printf ("      Default Language System\n");
+	    else
+	      printf ("      Language System %2d of %2d: %.4s\n", n_langsys, num_langsys,
+		      (const char *) script.get_lang_sys_tag (n_langsys));
+	    if (!langsys.has_required_feature ())
+	      printf ("        No required feature\n");
+	    else
+	      printf ("        Required feature index: %d\n",
+		      langsys.get_required_feature_index ());
+
+	    unsigned num_features = langsys.get_feature_count ();
+	    printf ("        %d feature(s) found in language system\n", num_features);
+	    for (unsigned n_feature = 0; n_feature < num_features; ++n_feature)
+	    {
+	      printf ("        Feature index %2d of %2d: %d\n", n_feature, num_features,
+		      langsys.get_feature_index (n_feature));
+	    }
+	  }
+	}
+
+	unsigned num_features = g.get_feature_count ();
+	printf ("    %d feature(s) found in table\n", num_features);
+	for (unsigned n_feature = 0; n_feature < num_features; ++n_feature)
+	{
+	  const Feature &feature = g.get_feature (n_feature);
+	  unsigned num_lookups = feature.get_lookup_count ();
+	  printf ("    Feature %2d of %2d: %c%c%c%c\n", n_feature, num_features,
+		  HB_UNTAG (g.get_feature_tag (n_feature)));
+
+	  printf ("        %d lookup(s) found in feature\n", num_lookups);
+	  for (unsigned n_lookup = 0; n_lookup < num_lookups; ++n_lookup) {
+	    printf ("        Lookup index %2d of %2d: %d\n", n_lookup, num_lookups,
+		    feature.get_lookup_index (n_lookup));
+	  }
+	}
+
+	unsigned num_lookups = g.get_lookup_count ();
+	printf ("    %d lookup(s) found in table\n", num_lookups);
+	for (unsigned n_lookup = 0; n_lookup < num_lookups; ++n_lookup)
+	{
+	  const Lookup &lookup = g.get_lookup (n_lookup);
+	  printf ("    Lookup %2d of %2d: type %d, props 0x%04X\n", n_lookup, num_lookups,
+		  lookup.get_type (), lookup.get_props ());
+	}
+
+	}
+	break;
+
+      case GDEF::tableTag:
+	{
+
+	const GDEF &gdef = *reinterpret_cast<const GDEF *> (font_data + table.offset);
+
+	printf ("    Has %sglyph classes\n",
+		  gdef.has_glyph_classes () ? "" : "no ");
+	printf ("    Has %smark attachment types\n",
+		  gdef.has_mark_attachment_types () ? "" : "no ");
+	printf ("    Has %sattach list\n",
+		  gdef.has_attach_list () ? "" : "no ");
+	printf ("    Has %slig carets\n",
+		  gdef.has_lig_carets () ? "" : "no ");
+	printf ("    Has %smark glyph sets\n",
+		  gdef.has_mark_glyph_sets () ? "" : "no ");
+	break;
+	}
+      }
+    }
+  }
+}
+/* end of private API use */
+#endif
+
+int
+main (int argc, char **argv)
+{
+  if (argc != 2)
+  {
+    fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]);
+    exit (1);
+  }
+
+  hb_blob_t *blob = hb_blob_create_from_file_or_fail (argv[1]);
+  assert (blob);
+  printf ("Opened font file %s: %d bytes long\n", argv[1], hb_blob_get_length (blob));
+#ifndef MAIN_CC_NO_PRIVATE_API
+  print_layout_info_using_private_api (blob);
+#endif
+#if !defined(HB_NO_COLOR) && !defined(HB_NO_DRAW)
+  dump_glyphs (blob, argv[1]);
+#endif
+  hb_blob_destroy (blob);
+
+  return 0;
+}