Commit ff3e1e6e authored by Salah-Eddin Shaban's avatar Salah-Eddin Shaban Committed by Jean-Baptiste Kempf

freetype: handle non-English family and style names in Windows

Close #6350
Signed-off-by: Jean-Baptiste Kempf's avatarJean-Baptiste Kempf <jb@videolan.org>
parent 5e9406e7
......@@ -30,6 +30,12 @@
* Preamble
*****************************************************************************/
/** \ingroup freetype_fonts
* @{
* \file
* Win32 font management
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
......@@ -37,6 +43,9 @@
#include <vlc_common.h>
#include <vlc_filter.h>
#include <ft2build.h>
#include FT_SFNT_NAMES_H
/* Win32 GDI */
#ifdef _WIN32
# include <windows.h>
......@@ -166,6 +175,166 @@ static char* GetWindowsFontPath()
return FromWide( wdir );
}
/**
* Get an SFNT name entry from an SFNT name table.
*
* \param p_name_data the start position of the name entry within the table [IN]
* \param p_storage_start the start position of the string storage area in the table [IN]
* \param p_table_end the position after the last byte of the table [IN]
* \param p_sfnt_name pointer to a \ref FT_SfntName to fill [OUT]
*
* \return \ref VLC_SUCCESS or \ref VLC_EGENERIC
*/
static int GetSfntNameEntry( FT_Byte *p_name_data, FT_Byte *p_storage_start,
FT_Byte *p_table_end, FT_SfntName *p_sfnt_name )
{
uint16_t i_string_len = U16_AT( p_name_data + 8 );
uint16_t i_string_offset = U16_AT( p_name_data + 10 );
if( i_string_len == 0
|| p_storage_start + i_string_offset + i_string_len > p_table_end )
return VLC_EGENERIC;
p_sfnt_name->platform_id = U16_AT( p_name_data + 0 );
p_sfnt_name->encoding_id = U16_AT( p_name_data + 2 );
p_sfnt_name->language_id = U16_AT( p_name_data + 4 );
p_sfnt_name->name_id = U16_AT( p_name_data + 6 );
p_sfnt_name->string_len = i_string_len;
p_sfnt_name->string = p_storage_start + i_string_offset;
return VLC_SUCCESS;
}
/**
* Get the SFNT name string matching the specified platform, encoding, name, and language IDs.
*
*\param p_table the SFNT table [IN]
*\param i_size table size in bytes [IN]
*\param i_platform_id platform ID as specified in the TrueType spec [IN]
*\param i_encoding_id encoding ID as specified in the TrueType spec [IN]
*\param i_name_id name ID as specified in the TrueType spec [IN]
*\param i_language_id language ID as specified in the TrueType spec [IN]
*\param pp_name the requested name.
* This is not null terminated. And can have different encodings
* based on the specified platform/encoding IDs [OUT]
*\param i_name_length the length in bytes of the returned name [OUT]
*
*\return \ref VLC_SUCCESS or \ref VLC_EGENERIC
*/
static int GetSfntNameString( FT_Byte *p_table, FT_UInt i_size, FT_UShort i_platform_id,
FT_UShort i_encoding_id, FT_UShort i_name_id, FT_UShort i_language_id,
FT_Byte **pp_name, FT_UInt *i_name_length )
{
uint16_t i_name_count = U16_AT( p_table + 2 );
uint16_t i_storage_offset = U16_AT( p_table + 4 );
FT_Byte *p_storage = p_table + i_storage_offset;
FT_Byte *p_names = p_table + 6;
const int i_entry_size = 12;
for(int i = 0; i < i_name_count; ++i)
{
FT_SfntName sfnt_name;
if( GetSfntNameEntry( p_names + i * i_entry_size, p_storage, p_table + i_size, &sfnt_name ) )
return VLC_EGENERIC;
if( sfnt_name.platform_id == i_platform_id && sfnt_name.encoding_id == i_encoding_id
&& sfnt_name.name_id == i_name_id && sfnt_name.language_id == i_language_id )
{
*i_name_length = sfnt_name.string_len;
*pp_name = sfnt_name.string;
return VLC_SUCCESS;
}
}
return VLC_EGENERIC;
}
/**
* Get the font's full English name.
*
* If the font has a family name or style name that matches the
* system's locale, EnumFontCallback() will be called with a \ref ENUMLOGFONTEX
* that has the localized name.
*
* We have to get the English name because that's what the Windows registry uses
* for name to file mapping.
*/
static TCHAR *GetFullEnglishName( const ENUMLOGFONTEX *lpelfe )
{
HFONT hFont = NULL;
HDC hDc = NULL;
FT_Byte *p_table = NULL;
TCHAR *psz_result = NULL;
hFont = CreateFontIndirect( &lpelfe->elfLogFont );
if( !hFont )
return NULL;
hDc = CreateCompatibleDC( NULL );
if( !hDc )
{
DeleteObject( hFont );
return NULL;
}
HFONT hOriginalFont = ( HFONT ) SelectObject( hDc, hFont );
const uint32_t i_name_tag = ntoh32( ( uint32_t ) 'n' << 24
| ( uint32_t ) 'a' << 16
| ( uint32_t ) 'm' << 8
| ( uint32_t ) 'e' << 0 );
int i_size = GetFontData( hDc, i_name_tag, 0, 0, 0 );
if( i_size <= 0 )
goto done;
p_table = malloc( i_size );
if( !p_table )
goto done;
if( GetFontData( hDc, i_name_tag, 0, p_table, i_size ) <= 0 )
goto done;
FT_Byte *p_name = NULL;
FT_UInt i_name_length = 0;
/* FIXME: Try other combinations of platform/encoding/language IDs if necessary */
if( GetSfntNameString( p_table, i_size, 3, 1, 4, 0x409, &p_name, &i_name_length) )
goto done;
int i_length_in_wchars = i_name_length / 2;
wchar_t *psz_name = malloc( ( i_length_in_wchars + 1 ) * sizeof( *psz_name ) );
if( !psz_name )
goto done;
for( int i = 0; i < i_length_in_wchars; ++i )
psz_name[ i ] = U16_AT( p_name + i * 2 );
psz_name[ i_length_in_wchars ] = 0;
#ifdef UNICODE
psz_result = psz_name;
#else
psz_result = FromWide( psz_name );
free( psz_name );
#endif
done:
free( p_table );
SelectObject( hDc, hOriginalFont );
DeleteObject( hFont );
DeleteDC( hDc );
return psz_result;
}
static int CALLBACK EnumFontCallback(const ENUMLOGFONTEX *lpelfe, const NEWTEXTMETRICEX *metric,
DWORD type, LPARAM lParam)
{
......@@ -191,7 +360,20 @@ static int CALLBACK EnumFontCallback(const ENUMLOGFONTEX *lpelfe, const NEWTEXTM
int i_index = 0;
if( GetFileFontByName( (LPCTSTR)lpelfe->elfFullName, &psz_filename, &i_index ) )
return 1;
{
TCHAR *psz_english_name = GetFullEnglishName( lpelfe );
if( !psz_english_name )
return 1;
if( GetFileFontByName( psz_english_name, &psz_filename, &i_index ) )
{
free( psz_english_name );
return 1;
}
free( psz_english_name );
}
if( strchr( psz_filename, DIR_SEP_CHAR ) )
psz_fontfile = psz_filename;
......@@ -269,7 +451,7 @@ static int CALLBACK MetaFileEnumProc( HDC hdc, HANDLETABLE* table,
return 1;
}
/*
/**
* This is a hack used by Chrome and WebKit to expose the fallback font used
* by Uniscribe for some given text for use with custom shapers / font engines.
*/
......
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