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Add hb_blob_create_from_file, a new API (#926)

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This commit is contained in:
Ebrahim Byagowi 2018-04-20 10:29:06 +04:30 committed by Behdad Esfahbod
parent 4fa1c6705a
commit ce17340b23
16 changed files with 158 additions and 398 deletions
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2
TODO
View File

@ -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)

1
docs/harfbuzz-sections.txt
View File

@ -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

33
src/dump-emoji.cc
View File

@ -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);

11
src/dump-fon.cc
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@ -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 ();

131
src/hb-blob.cc
View File

@ -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 ();
}

2
src/hb-blob.h
View File

@ -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

26
src/main.cc
View File

@ -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))

42
src/test-buffer-serialize.cc
View File

@ -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;

42
src/test-size-params.cc
View File

@ -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;

42
src/test-would-substitute.cc
View File

@ -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;

42
src/test.cc
View File

@ -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 */

54
test/api/hb-subset-test.h
View File

@ -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 *

33
test/api/hb-test.h
View File

@ -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

86
util/options.cc
View File

@ -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;
if (!font_file)
fail (true, "No font file set");
/* 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 (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 */

6
util/options.hh
View File

@ -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;

3
util/view-cairo.hh
View File

@ -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)