Add hb_blob_create_from_file, a new API (#926)

TODO

@@ -17,8 +17,6 @@ API additions
 
 - Language to/from script.
 
-- blob_from_file?
-
 - Add hb-cairo glue
 
 - Add sanitize API (and a cached version, that saves result on blob user-data)

docs/harfbuzz-sections.txt

@@ -8,6 +8,7 @@ HB_EXTERN
 <SECTION>
 <FILE>hb-blob</FILE>
 hb_blob_create
+hb_blob_create_from_file
 hb_blob_create_sub_blob
 hb_blob_copy_writable_or_fail
 hb_blob_destroy

src/dump-emoji.cc

@@ -219,38 +219,7 @@ int main (int argc, char **argv)
     exit (1);
   }
 
-  hb_blob_t *blob = nullptr;
-  {
-    const char *font_data;
-    unsigned int len;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-    GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-    font_data = g_mapped_file_get_contents (mf);
-    len = g_mapped_file_get_length (mf);
-    destroy = (hb_destroy_func_t) g_mapped_file_unref;
-    user_data = (void *) mf;
-    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-    FILE *f = fopen (argv[1], "rb");
-    fseek (f, 0, SEEK_END);
-    len = ftell (f);
-    fseek (f, 0, SEEK_SET);
-    font_data = (const char *) malloc (len);
-    if (!font_data) len = 0;
-    len = fread ((char *) font_data, 1, len, f);
-    destroy = free;
-    user_data = (void *) font_data;
-    fclose (f);
-    mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
-  }
-
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
   hb_face_t *face = hb_face_create (blob, 0);
   hb_font_t *font = hb_font_create (face);
 

src/dump-fon.cc

@@ -538,22 +538,13 @@ struct LE_IMAGE_DOS_HEADER {
 };
 
 int main (int argc, char** argv) {
-  FILE *f = fopen (argv[1], "rb");
-  fseek (f, 0, SEEK_END);
-  unsigned int len = ftell (f);
-  rewind (f);
-  const char *font_data = (const char *) malloc (len);
-  len = fread ((char *) font_data, 1, len, f);
-
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
 
   OT::Sanitizer<LE_IMAGE_DOS_HEADER> sanitizer;
-  hb_blob_t *blob = hb_blob_create (font_data, len, HB_MEMORY_MODE_WRITABLE,
-				    (void *) font_data, free);
   hb_blob_t *font_blob = sanitizer.sanitize (blob);
   const LE_IMAGE_DOS_HEADER* dos_header =
     OT::Sanitizer<LE_IMAGE_DOS_HEADER>::lock_instance (font_blob);
 
-
   const NE_RESOURCE_TABLE &rtable = dos_header->get_os2_header ().get_resource_table ();
   int shift = rtable.get_shift_value ();
   const NE_TYPEINFO& entry = rtable.get_fonts_entry ();

src/hb-blob.cc

@@ -43,6 +43,10 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 
 
 struct hb_blob_t {
@@ -273,7 +277,7 @@ hb_blob_destroy (hb_blob_t *blob)
  * @destroy: callback to call when @data is not needed anymore.
  * @replace: whether to replace an existing data with the same key.
  *
- * Return value: 
+ * Return value:
  *
  * Since: 0.9.2
  **/
@@ -292,9 +296,9 @@ hb_blob_set_user_data (hb_blob_t          *blob,
  * @blob: a blob.
  * @key: key for data to get.
  *
- * 
  *
- * Return value: (transfer none): 
+ *
+ * Return value: (transfer none):
  *
  * Since: 0.9.2
  **/
@@ -310,7 +314,7 @@ hb_blob_get_user_data (hb_blob_t          *blob,
  * hb_blob_make_immutable:
  * @blob: a blob.
  *
- * 
+ *
  *
  * Since: 0.9.2
  **/
@@ -327,7 +331,7 @@ hb_blob_make_immutable (hb_blob_t *blob)
  * hb_blob_is_immutable:
  * @blob: a blob.
  *
- * 
+ *
  *
  * Return value: TODO
  *
@@ -344,7 +348,7 @@ hb_blob_is_immutable (hb_blob_t *blob)
  * hb_blob_get_length:
  * @blob: a blob.
  *
- * 
+ *
  *
  * Return value: the length of blob data in bytes.
  *
@@ -361,9 +365,9 @@ hb_blob_get_length (hb_blob_t *blob)
  * @blob: a blob.
  * @length: (out):
  *
- * 
  *
- * Returns: (transfer none) (array length=length): 
+ *
+ * Returns: (transfer none) (array length=length):
  *
  * Since: 0.9.2
  **/
@@ -502,3 +506,114 @@ _try_writable (hb_blob_t *blob)
 
   return true;
 }
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+#include <windows.h>
+#include <io.h>
+
+#undef fstat
+#define fstat(a,b) _fstati64(a,b)
+#undef stat
+#define stat _stati64
+
+#ifndef S_ISREG
+# define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
+#endif
+#endif // defined(_WIN32) || defined(__CYGWIN__)
+
+#ifndef _O_BINARY
+# define _O_BINARY 0
+#endif
+
+#ifndef MAP_FAILED
+# define MAP_FAILED ((void *) -1)
+#endif
+
+struct hb_mapped_file_t
+{
+  char *contents;
+  unsigned long length;
+#if defined(_WIN32) || defined(__CYGWIN__)
+  HANDLE mapping;
+#endif
+};
+
+static void
+_hb_mapped_file_destroy (hb_mapped_file_t *file)
+{
+#ifdef HAVE_MMAP
+  munmap (file->contents, file->length);
+#elif defined(_WIN32) || defined(__CYGWIN__)
+  UnmapViewOfFile (file->contents);
+  CloseHandle (file->mapping);
+#else
+  free (file->contents);
+#endif
+
+  free (file);
+}
+
+/**
+ * hb_blob_create_from_file:
+ * @file_name: font filename.
+ *
+ * Returns: A hb_blob_t pointer with the content of the file
+ *
+ * Since: REPLACEME
+ **/
+hb_blob_t *
+hb_blob_create_from_file (const char *file_name)
+{
+  // Adopted from glib's gmappedfile.c with Matthias Clasen and
+  // Allison Lortie permission but changed to suit our need.
+  bool writable = false;
+  hb_memory_mode_t mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
+
+  int fd = open (file_name, (writable ? O_RDWR : O_RDONLY) | _O_BINARY, 0);
+  if (unlikely (fd == -1)) return hb_blob_get_empty ();
+
+  hb_mapped_file_t *file = (hb_mapped_file_t *) calloc (sizeof (hb_mapped_file_t), 1);
+
+  struct stat st;
+  if (unlikely (fstat (fd, &st) == -1)) goto fail;
+
+  // If the file size is 0 and isn't regular, give up
+  if (unlikely (st.st_size == 0 && S_ISREG (st.st_mode))) goto fail;
+
+  file->length = (unsigned long) st.st_size;
+
+#ifdef HAVE_MMAP
+  file->contents = (char *) mmap (nullptr, file->length,
+				  writable ? PROT_READ|PROT_WRITE : PROT_READ,
+				  MAP_PRIVATE, fd, 0);
+  if (unlikely (file->contents == MAP_FAILED)) goto fail;
+#elif defined(_WIN32) || defined(__CYGWIN__)
+  file->mapping = CreateFileMapping ((HANDLE) _get_osfhandle (fd), nullptr,
+				     writable ? PAGE_WRITECOPY : PAGE_READONLY,
+				     0, 0, nullptr);
+  if (unlikely (file->mapping == nullptr)) goto fail;
+
+  file->contents = (char *) MapViewOfFile (file->mapping,
+					   writable ? FILE_MAP_COPY : FILE_MAP_READ,
+					   0, 0, 0);
+  if (unlikely (file->contents == nullptr))
+  {
+    CloseHandle (file->mapping);
+    goto fail;
+  }
+#else
+  file->contents = (char *) malloc (file->length);
+  if (unlikely (!file->contents)) goto fail;
+  read (fd, file->contents, file->length);
+  mm = HB_MEMORY_MODE_WRITABLE;
+#endif
+
+  close (fd);
+  return hb_blob_create (file->contents, file->length, mm, (void *) file,
+			 (hb_destroy_func_t) _hb_mapped_file_destroy);
+
+fail:
+  close (fd);
+  free (file);
+  return hb_blob_get_empty ();
+}

src/hb-blob.h

@@ -123,6 +123,8 @@ hb_blob_get_data (hb_blob_t *blob, unsigned int *length);
 HB_EXTERN char *
 hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length);
 
+HB_EXTERN hb_blob_t *
+hb_blob_create_from_file (const char *file_name);
 
 HB_END_DECLS
 

src/main.cc

@@ -49,32 +49,12 @@ main (int argc, char **argv)
     exit (1);
   }
 
-  const char *font_data = nullptr;
-  int len = 0;
-  hb_destroy_func_t destroy;
-  hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-  GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-  font_data = g_mapped_file_get_contents (mf);
-  len = g_mapped_file_get_length (mf);
-  destroy = (hb_destroy_func_t) g_mapped_file_unref;
-  mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-  FILE *f = fopen (argv[1], "rb");
-  fseek (f, 0, SEEK_END);
-  len = ftell (f);
-  fseek (f, 0, SEEK_SET);
-  font_data = (const char *) malloc (len);
-  len = fread ((char *) font_data, 1, len, f);
-  destroy = free;
-  mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
+  unsigned int len;
+  const char *font_data = hb_blob_get_data (blob, &len);
   printf ("Opened font file %s: %d bytes long\n", argv[1], len);
 
   Sanitizer<OpenTypeFontFile> sanitizer;
-  hb_blob_t *blob = hb_blob_create (font_data, len, mm, (void *) font_data, destroy);
   hb_blob_t *font_blob = sanitizer.sanitize (blob);
   const OpenTypeFontFile* sanitized = Sanitizer<OpenTypeFontFile>::lock_instance (font_blob);
   if (sanitized == &Null (OpenTypeFontFile))

src/test-buffer-serialize.cc

@@ -32,57 +32,17 @@
 #include "hb-ft.h"
 #endif
 
-#ifdef HAVE_GLIB
-# include <glib.h>
-# if !GLIB_CHECK_VERSION (2, 22, 0)
-#  define g_mapped_file_unref g_mapped_file_free
-# endif
-#endif
-#include <stdlib.h>
 #include <stdio.h>
 
 int
 main (int argc, char **argv)
 {
-  hb_blob_t *blob = nullptr;
-
   if (argc != 2) {
     fprintf (stderr, "usage: %s font-file\n", argv[0]);
     exit (1);
   }
 
-  /* Create the blob */
-  {
-    const char *font_data;
-    unsigned int len;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-    GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-    font_data = g_mapped_file_get_contents (mf);
-    len = g_mapped_file_get_length (mf);
-    destroy = (hb_destroy_func_t) g_mapped_file_unref;
-    user_data = (void *) mf;
-    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-    FILE *f = fopen (argv[1], "rb");
-    fseek (f, 0, SEEK_END);
-    len = ftell (f);
-    fseek (f, 0, SEEK_SET);
-    font_data = (const char *) malloc (len);
-    if (!font_data) len = 0;
-    len = fread ((char *) font_data, 1, len, f);
-    destroy = free;
-    user_data = (void *) font_data;
-    fclose (f);
-    mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
-  }
-
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
   hb_face_t *face = hb_face_create (blob, 0 /* first face */);
   hb_blob_destroy (blob);
   blob = nullptr;

src/test-size-params.cc

@@ -29,58 +29,18 @@
 #include "hb.h"
 #include "hb-ot.h"
 
-#ifdef HAVE_GLIB
-# include <glib.h>
-# if !GLIB_CHECK_VERSION (2, 22, 0)
-#  define g_mapped_file_unref g_mapped_file_free
-# endif
-#endif
-#include <stdlib.h>
 #include <stdio.h>
 
 int
 main (int argc, char **argv)
 {
-  hb_blob_t *blob = nullptr;
-
   if (argc != 2) {
     fprintf (stderr, "usage: %s font-file\n", argv[0]);
     exit (1);
   }
 
-  /* Create the blob */
-  {
-    const char *font_data;
-    unsigned int len;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-    GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-    font_data = g_mapped_file_get_contents (mf);
-    len = g_mapped_file_get_length (mf);
-    destroy = (hb_destroy_func_t) g_mapped_file_unref;
-    user_data = (void *) mf;
-    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-    FILE *f = fopen (argv[1], "rb");
-    fseek (f, 0, SEEK_END);
-    len = ftell (f);
-    fseek (f, 0, SEEK_SET);
-    font_data = (const char *) malloc (len);
-    if (!font_data) len = 0;
-    len = fread ((char *) font_data, 1, len, f);
-    destroy = free;
-    user_data = (void *) font_data;
-    fclose (f);
-    mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
-  }
-
   /* Create the face */
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
   hb_face_t *face = hb_face_create (blob, 0 /* first face */);
   hb_blob_destroy (blob);
   blob = nullptr;

src/test-would-substitute.cc

@@ -29,13 +29,6 @@
 #include "hb.h"
 #include "hb-ot.h"
 
-#ifdef HAVE_GLIB
-# include <glib.h>
-# if !GLIB_CHECK_VERSION (2, 22, 0)
-#  define g_mapped_file_unref g_mapped_file_free
-# endif
-#endif
-#include <stdlib.h>
 #include <stdio.h>
 
 #ifdef HAVE_FREETYPE
@@ -45,46 +38,13 @@
 int
 main (int argc, char **argv)
 {
-  hb_blob_t *blob = nullptr;
-
   if (argc != 4 && argc != 5) {
     fprintf (stderr, "usage: %s font-file lookup-index first-glyph [second-glyph]\n", argv[0]);
     exit (1);
   }
 
-  /* Create the blob */
-  {
-    const char *font_data;
-    unsigned int len;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-    GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-    font_data = g_mapped_file_get_contents (mf);
-    len = g_mapped_file_get_length (mf);
-    destroy = (hb_destroy_func_t) g_mapped_file_unref;
-    user_data = (void *) mf;
-    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-    FILE *f = fopen (argv[1], "rb");
-    fseek (f, 0, SEEK_END);
-    len = ftell (f);
-    fseek (f, 0, SEEK_SET);
-    font_data = (const char *) malloc (len);
-    if (!font_data) len = 0;
-    len = fread ((char *) font_data, 1, len, f);
-    destroy = free;
-    user_data = (void *) font_data;
-    fclose (f);
-    mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
-  }
-
   /* Create the face */
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
   hb_face_t *face = hb_face_create (blob, 0 /* first face */);
   hb_blob_destroy (blob);
   blob = nullptr;

src/test.cc

@@ -28,13 +28,6 @@
 
 #include "hb.h"
 
-#ifdef HAVE_GLIB
-# include <glib.h>
-# if !GLIB_CHECK_VERSION (2, 22, 0)
-#  define g_mapped_file_unref g_mapped_file_free
-# endif
-#endif
-#include <stdlib.h>
 #include <stdio.h>
 
 #ifdef HAVE_FREETYPE
@@ -44,45 +37,12 @@
 int
 main (int argc, char **argv)
 {
-  hb_blob_t *blob = nullptr;
-
   if (argc != 2) {
     fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]);
     exit (1);
   }
 
-  /* Create the blob */
-  {
-    const char *font_data;
-    unsigned int len;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-#ifdef HAVE_GLIB
-    GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
-    font_data = g_mapped_file_get_contents (mf);
-    len = g_mapped_file_get_length (mf);
-    destroy = (hb_destroy_func_t) g_mapped_file_unref;
-    user_data = (void *) mf;
-    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-#else
-    FILE *f = fopen (argv[1], "rb");
-    fseek (f, 0, SEEK_END);
-    len = ftell (f);
-    fseek (f, 0, SEEK_SET);
-    font_data = (const char *) malloc (len);
-    if (!font_data) len = 0;
-    len = fread ((char *) font_data, 1, len, f);
-    destroy = free;
-    user_data = (void *) font_data;
-    fclose (f);
-    mm = HB_MEMORY_MODE_WRITABLE;
-#endif
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
-  }
-
+  hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
   printf ("Opened font file %s: %u bytes long\n", argv[1], hb_blob_get_length (blob));
 
   /* Create the face */

test/api/hb-subset-test.h

@@ -47,64 +47,16 @@ typedef short bool;
 
 HB_BEGIN_DECLS
 
-static inline char *
-hb_subset_test_read_file (const char *path,
-                          size_t     *length /* OUT */)
-{
-  FILE *fp = fopen (path, "rb");
-
-  long file_length = 0;
-  char *buffer = NULL;
-  if (fp && fseek (fp, 0, SEEK_END) == 0)
-  {
-    file_length = ftell(fp);
-    rewind (fp);
-  }
-
-  if (file_length > 0)
-  {
-    buffer = (char *) calloc (file_length + 1, sizeof (char));
-    if (buffer && fread (buffer, 1, file_length, fp) == (size_t) file_length)
-    {
-      *length = file_length;
-    }
-    else
-    {
-      free (buffer);
-      buffer = NULL;
-    }
-  }
-
-  if (fp)
-    fclose(fp);
-
-  return buffer;
-}
-
 static inline hb_face_t *
 hb_subset_test_open_font (const char *font_path)
 {
 #if GLIB_CHECK_VERSION(2,37,2)
-  gchar* path = g_test_build_filename(G_TEST_DIST, font_path, NULL);
+  char* path = g_test_build_filename(G_TEST_DIST, font_path, NULL);
 #else
-  gchar* path = g_strdup(font_path);
+  char* path = g_strdup(font_path);
 #endif
 
-  size_t length;
-  char *font_data = hb_subset_test_read_file(path, &length);
-
-  if (font_data != NULL) {
-    hb_blob_t *blob = hb_blob_create (font_data,
-                                      length,
-                                      HB_MEMORY_MODE_READONLY,
-                                      font_data,
-                                      free);
-    hb_face_t *face = hb_face_create (blob, 0);
-    hb_blob_destroy (blob);
-    return face;
-  }
-  g_assert (false);
-  return NULL; /* Shut up, compiler! */
+  return hb_face_create (hb_blob_create_from_file (path), 0);
 }
 
 static inline hb_subset_input_t *

test/api/hb-test.h

@@ -87,39 +87,6 @@ hb_test_run (void)
   return g_test_run ();
 }
 
-
-#if 0
-/* Helpers for loading test fonts */
-static inline hb_face_t *
-hb_test_load_face (const char *path)
-{
-  const char *font_data = NULL;
-  unsigned int len = 0;
-  hb_blob_t *blob = NULL;
-  hb_face_t *face = NULL;
-
-  FILE *f = fopen (path, "rb");
-  if (!f) {
-    perror (path);
-    exit (1);
-  }
-
-  fseek (f, 0, SEEK_END);
-  len = ftell (f);
-  fseek (f, 0, SEEK_SET);
-  font_data = (const char *) malloc (len);
-  if (!font_data) len = 0;
-  len = fread ((char *) font_data, 1, len, f);
-  fclose (f);
-
-  blob = hb_blob_create (font_data, len, HB_MEMORY_MODE_READONLY, 0, free);
-  face = hb_face_create (blob, 0 /* first face */);
-  hb_blob_destroy (blob);
-  return face;
-}
-#endif
-
-
 /* Bugzilla helpers */
 
 static inline void

util/options.cc

@@ -65,8 +65,6 @@ fail (hb_bool_t suggest_help, const char *format, ...)
 }
 
 
-hb_bool_t debug = false;
-
 static gchar *
 shapers_to_string (void)
 {
@@ -107,7 +105,6 @@ option_parser_t::add_main_options (void)
   {
     {"version",		0, G_OPTION_FLAG_NO_ARG,
 			      G_OPTION_ARG_CALLBACK,	(gpointer) &show_version,	"Show version numbers",			nullptr},
-    {"debug",		0, 0, G_OPTION_ARG_NONE,	&debug,				"Free all resources before exit",	nullptr},
     {nullptr}
   };
   g_option_context_add_main_entries (context, entries, nullptr);
@@ -649,74 +646,29 @@ font_options_t::get_font (void) const
   hb_blob_t *blob = nullptr;
 
   /* Create the blob */
-  {
-    char *font_data;
-    unsigned int len = 0;
-    hb_destroy_func_t destroy;
-    void *user_data;
-    hb_memory_mode_t mm;
-
-    /* This is a hell of a lot of code for just reading a file! */
-    if (!font_file)
-      fail (true, "No font file set");
-
-    if (0 == strcmp (font_file, "-")) {
-      /* read it */
-      GString *gs = g_string_new (nullptr);
-      char buf[BUFSIZ];
+  if (!font_file)
+    fail (true, "No font file set");
+
+  if (0 == strcmp (font_file, "-")) {
+    /* read it */
+    GString *gs = g_string_new (nullptr);
+    char buf[BUFSIZ];
 #if defined(_WIN32) || defined(__CYGWIN__)
-      setmode (fileno (stdin), O_BINARY);
+    setmode (fileno (stdin), O_BINARY);
 #endif
-      while (!feof (stdin)) {
-	size_t ret = fread (buf, 1, sizeof (buf), stdin);
-	if (ferror (stdin))
-	  fail (false, "Failed reading font from standard input: %s",
-		strerror (errno));
-	g_string_append_len (gs, buf, ret);
-      }
-      len = gs->len;
-      font_data = g_string_free (gs, false);
-      user_data = font_data;
-      destroy = (hb_destroy_func_t) g_free;
-      mm = HB_MEMORY_MODE_WRITABLE;
-    } else {
-      GError *error = nullptr;
-      GMappedFile *mf = g_mapped_file_new (font_file, false, &error);
-      if (mf) {
-	font_data = g_mapped_file_get_contents (mf);
-	len = g_mapped_file_get_length (mf);
-	if (len) {
-	  destroy = (hb_destroy_func_t) g_mapped_file_unref;
-	  user_data = (void *) mf;
-	  mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
-	} else
-	  g_mapped_file_unref (mf);
-      } else {
-	fail (false, "%s", error->message);
-	//g_error_free (error);
-      }
-      if (!len) {
-	/* GMappedFile is buggy, it doesn't fail if file isn't regular.
-	 * Try reading.
-	 * https://bugzilla.gnome.org/show_bug.cgi?id=659212 */
-        GError *error = nullptr;
-	gsize l;
-	if (g_file_get_contents (font_file, &font_data, &l, &error)) {
-	  len = l;
-	  destroy = (hb_destroy_func_t) g_free;
-	  user_data = (void *) font_data;
-	  mm = HB_MEMORY_MODE_WRITABLE;
-	} else {
-	  fail (false, "%s", error->message);
-	  //g_error_free (error);
-	}
-      }
+    while (!feof (stdin)) {
+      size_t ret = fread (buf, 1, sizeof (buf), stdin);
+      if (ferror (stdin))
+	fail (false, "Failed reading font from standard input: %s",
+	      strerror (errno));
+      g_string_append_len (gs, buf, ret);
     }
-
-    if (debug)
-      mm = HB_MEMORY_MODE_DUPLICATE;
-
-    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
+    char *font_data = g_string_free (gs, false);
+    blob = hb_blob_create (font_data, gs->len,
+			   HB_MEMORY_MODE_WRITABLE, font_data,
+			   (hb_destroy_func_t) g_free);
+  } else {
+    blob = hb_blob_create_from_file (font_file);
   }
 
   /* Create the face */

util/options.hh

@@ -52,14 +52,8 @@
 #include <glib.h>
 #include <glib/gprintf.h>
 
-#if !GLIB_CHECK_VERSION (2, 22, 0)
-# define g_mapped_file_unref g_mapped_file_free
-#endif
-
 void fail (hb_bool_t suggest_help, const char *format, ...) G_GNUC_NORETURN G_GNUC_PRINTF (2, 3);
 
-extern hb_bool_t debug;
-
 struct option_group_t
 {
   virtual void add_options (struct option_parser_t *parser) = 0;

util/view-cairo.hh

@@ -40,8 +40,7 @@ struct view_cairo_t
 		 direction (HB_DIRECTION_INVALID),
 		 lines (0), scale_bits (0) {}
   ~view_cairo_t (void) {
-    if (debug)
-      cairo_debug_reset_static_data ();
+    cairo_debug_reset_static_data ();
   }
 
   void init (hb_buffer_t *buffer, const font_options_t *font_opts)