1 files changed, 115 insertions, 0 deletions
diff --git a/src/3rdparty/freetype/src/autofit/ft-hb.c b/src/3rdparty/freetype/src/autofit/ft-hb.c
new file mode 100644
index 0000000000..71aee04550
--- /dev/null
+++ b/src/3rdparty/freetype/src/autofit/ft-hb.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright © 2009, 2023  Red Hat, Inc.
+ * Copyright © 2015  Google, Inc.
+ *
+ * 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, Matthias Clasen
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include <freetype/freetype.h>
+#include <freetype/tttables.h>
+
+#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
+
+#include "ft-hb.h"
+
+/* The following three functions are a more or less verbatim
+ * copy of corresponding HarfBuzz code from hb-ft.cc
+ */
+
+static hb_blob_t *
+hb_ft_reference_table_ (hb_face_t *face, hb_tag_t tag, void *user_data)
+{
+  FT_Face ft_face = (FT_Face) user_data;
+  FT_Byte *buffer;
+  FT_ULong  length = 0;
+  FT_Error error;
+
+  FT_UNUSED (face);
+
+  /* Note: FreeType like HarfBuzz uses the NONE tag for fetching the entire blob */
+
+  error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
+  if (error)
+    return NULL;
+
+  buffer = (FT_Byte *) ft_smalloc (length);
+  if (!buffer)
+    return NULL;
+
+  error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
+  if (error)
+  {
+    free (buffer);
+    return NULL;
+  }
+
+  return hb_blob_create ((const char *) buffer, length,
+                         HB_MEMORY_MODE_WRITABLE,
+                         buffer, ft_sfree);
+}
+
+static hb_face_t *
+hb_ft_face_create_ (FT_Face           ft_face,
+                    hb_destroy_func_t destroy)
+{
+  hb_face_t *face;
+
+  if (!ft_face->stream->read) {
+    hb_blob_t *blob;
+
+    blob = hb_blob_create ((const char *) ft_face->stream->base,
+                           (unsigned int) ft_face->stream->size,
+                           HB_MEMORY_MODE_READONLY,
+                           ft_face, destroy);
+    face = hb_face_create (blob, ft_face->face_index);
+    hb_blob_destroy (blob);
+  } else {
+    face = hb_face_create_for_tables (hb_ft_reference_table_, ft_face, destroy);
+  }
+
+  hb_face_set_index (face, ft_face->face_index);
+  hb_face_set_upem (face, ft_face->units_per_EM);
+
+  return face;
+}
+
+FT_LOCAL_DEF(hb_font_t *)
+hb_ft_font_create_ (FT_Face           ft_face,
+                    hb_destroy_func_t destroy)
+{
+  hb_font_t *font;
+  hb_face_t *face;
+
+  face = hb_ft_face_create_ (ft_face, destroy);
+  font = hb_font_create (face);
+  hb_face_destroy (face);
+  return font;
+}
+
+#else /* !FT_CONFIG_OPTION_USE_HARFBUZZ */
+
+/* ANSI C doesn't like empty source files */
+typedef int  ft_hb_dummy_;
+
+#endif /* !FT_CONFIG_OPTION_USE_HARFBUZZ */
+
+/* END */