1 files changed, 99 insertions, 0 deletions
diff --git a/pango2/pangocairo-ft-font.c b/pango2/pangocairo-ft-font.c
new file mode 100644
index 00000000..f8595ac0
--- /dev/null
+++ b/pango2/pangocairo-ft-font.c
@@ -0,0 +1,99 @@
+/*
+ * pangocairo-ft-font.c: Freetype font handling
+ *
+ * Copyright (C) 2022 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "pango-features.h"
+#include "pangocairo-private.h"
+#include "pango-hbfont-private.h"
+#include "pango-hbface-private.h"
+
+#ifdef CAIRO_HAS_FT_FONT
+
+#include <hb-ot.h>
+#include <cairo-ft.h>
+#include <freetype/ftmm.h>
+
+cairo_font_face_t *
+create_cairo_ft_font_face (Pango2Font *font)
+{
+  static FT_Library ft_library;
+
+  Pango2HbFace *face = PANGO2_HB_FACE (font->face);
+  hb_blob_t *blob;
+  const char *blob_data;
+  unsigned int blob_length;
+  FT_Face ft_face;
+  hb_font_t *hb_font;
+  unsigned int num_coords;
+  const int *coords;
+  cairo_font_face_t *cairo_face;
+  static const cairo_user_data_key_t key;
+  static const cairo_user_data_key_t key2;
+  FT_Error error;
+
+  if (g_once_init_enter (&ft_library))
+    {
+      FT_Library library;
+      FT_Init_FreeType (&library);
+      g_once_init_leave (&ft_library, library);
+    }
+
+  hb_font = pango2_font_get_hb_font (font);
+  blob = hb_face_reference_blob (hb_font_get_face (hb_font));
+  blob_data = hb_blob_get_data (blob, &blob_length);
+
+  if ((error = FT_New_Memory_Face (ft_library,
+                                   (const FT_Byte *) blob_data,
+                                   blob_length,
+                                   hb_face_get_index (face->face),
+                                   &ft_face)) != 0)
+    {
+      hb_blob_destroy (blob);
+      g_warning ("FT_New_Memory_Face failed: %d %s", error, FT_Error_String (error));
+      return NULL;
+    }
+
+  coords = hb_font_get_var_coords_normalized (hb_font, &num_coords);
+  if (num_coords > 0)
+    {
+      FT_Fixed *ft_coords = (FT_Fixed *) g_alloca (num_coords * sizeof (FT_Fixed));
+
+      for (unsigned int i = 0; i < num_coords; i++)
+        ft_coords[i] = coords[i] << 2;
+
+      FT_Set_Var_Blend_Coordinates (ft_face, num_coords, ft_coords);
+    }
+
+  cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, FT_LOAD_NO_HINTING | FT_LOAD_COLOR);
+
+  if (face->embolden)
+    cairo_ft_font_face_set_synthesize (cairo_face, CAIRO_FT_SYNTHESIZE_BOLD);
+
+  cairo_font_face_set_user_data (cairo_face, &key,
+                                 ft_face, (cairo_destroy_func_t) FT_Done_Face);
+  cairo_font_face_set_user_data (cairo_face, &key2,
+                                 blob, (cairo_destroy_func_t) hb_blob_destroy);
+
+  return cairo_face;
+}
+
+#endif