FT_Get_Advance( FT_Face face,
FT_UInt gindex,
FT_Int32 flags,
FT_Fixed *padvance )
{
FT_Face_GetAdvancesFunc func;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !padvance )
return FT_THROW( Invalid_Argument );
if ( gindex >= (FT_UInt)face->num_glyphs )
return FT_THROW( Invalid_Glyph_Index );
func = face->driver->clazz->get_advances;
if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
{
FT_Error error;
error = func( face, gindex, 1, flags, padvance );
if ( !error )
return _ft_face_scale_advances( face, padvance, 1, flags );
if ( FT_ERR_NEQ( error, Unimplemented_Feature ) )
return error;
}
return FT_Get_Advances( face, gindex, 1, flags, padvance );
}
FT_Get_Advances( FT_Face face,
FT_UInt start,
FT_UInt count,
FT_Int32 flags,
FT_Fixed *padvances )
{
FT_Face_GetAdvancesFunc func;
FT_UInt num, end, nn;
FT_Error error = FT_Err_Ok;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !padvances )
return FT_THROW( Invalid_Argument );
num = (FT_UInt)face->num_glyphs;
end = start + count;
if ( start >= num || end < start || end > num )
return FT_THROW( Invalid_Glyph_Index );
if ( count == 0 )
return FT_Err_Ok;
func = face->driver->clazz->get_advances;
if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
{
error = func( face, start, count, flags, padvances );
if ( !error )
return _ft_face_scale_advances( face, padvances, count, flags );
if ( FT_ERR_NEQ( error, Unimplemented_Feature ) )
return error;
}
error = FT_Err_Ok;
if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
return FT_THROW( Unimplemented_Feature );
flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY;
for ( nn = 0; nn < count; nn++ )
{
error = FT_Load_Glyph( face, start + nn, flags );
if ( error )
break;
/* scale from 26.6 to 16.16 */
padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
? face->glyph->advance.y << 10
: face->glyph->advance.x << 10;
}
return error;
}
FT_Outline_Render( FT_Library library,
FT_Outline* outline,
FT_Raster_Params* params )
{
FT_Error error;
FT_Renderer renderer;
FT_ListNode node;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !outline )
return FT_THROW( Invalid_Outline );
if ( !params )
return FT_THROW( Invalid_Argument );
renderer = library->cur_renderer;
node = library->renderers.head;
params->source = (void*)outline;
error = FT_ERR( Cannot_Render_Glyph );
while ( renderer )
{
error = renderer->raster_render( renderer->raster, params );
if ( !error || FT_ERR_NEQ( error, Cannot_Render_Glyph ) )
break;
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
/* is unsupported by the current renderer for this glyph image */
/* format */
/* now, look for another renderer that supports the same */
/* format */
renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE,
&node );
}
return error;
}
T1_Face_Init( FT_Stream stream,
FT_Face t1face, /* T1_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
T1_Face face = (T1_Face)t1face;
FT_Error error;
FT_Service_PsCMaps psnames;
PSAux_Service psaux;
T1_Font type1 = &face->type1;
PS_FontInfo info = &type1->font_info;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( stream );
face->root.num_faces = 1;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
face->psnames = psnames;
face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psaux" );
psaux = (PSAux_Service)face->psaux;
if ( !psaux )
{
FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"pshinter" );
FT_TRACE2(( "Type 1 driver\n" ));
/* open the tokenizer; this will also check the font format */
error = T1_Open_Face( face );
if ( error )
goto Exit;
/* if we just wanted to check the format, leave successfully now */
if ( face_index < 0 )
goto Exit;
/* check the face index */
if ( face_index > 0 )
{
FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
/* now load the font program into the face object */
/* initialize the face object fields */
/* set up root face fields */
{
FT_Face root = (FT_Face)&face->root;
root->num_glyphs = type1->num_glyphs;
root->face_index = 0;
root->face_flags |= FT_FACE_FLAG_SCALABLE |
FT_FACE_FLAG_HORIZONTAL |
FT_FACE_FLAG_GLYPH_NAMES |
FT_FACE_FLAG_HINTER;
if ( info->is_fixed_pitch )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
if ( face->blend )
root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
/* XXX: TODO -- add kerning with .afm support */
/* The following code to extract the family and the style is very */
/* simplistic and might get some things wrong. For a full-featured */
/* algorithm you might have a look at the whitepaper given at */
/* */
/* http://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
/* get style name -- be careful, some broken fonts only */
/* have a `/FontName' dictionary entry! */
root->family_name = info->family_name;
root->style_name = NULL;
if ( root->family_name )
{
char* full = info->full_name;
char* family = root->family_name;
if ( full )
{
FT_Bool the_same = TRUE;
while ( *full )
{
if ( *full == *family )
{
family++;
full++;
}
else
{
if ( *full == ' ' || *full == '-' )
full++;
else if ( *family == ' ' || *family == '-' )
family++;
else
{
the_same = FALSE;
if ( !*family )
root->style_name = full;
break;
}
}
}
if ( the_same )
root->style_name = (char *)"Regular";
}
}
else
{
/* do we have a `/FontName'? */
if ( type1->font_name )
root->family_name = type1->font_name;
}
if ( !root->style_name )
{
if ( info->weight )
root->style_name = info->weight;
else
/* assume `Regular' style because we don't know better */
root->style_name = (char *)"Regular";
}
/* compute style flags */
root->style_flags = 0;
if ( info->italic_angle )
root->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( info->weight )
{
if ( !ft_strcmp( info->weight, "Bold" ) ||
!ft_strcmp( info->weight, "Black" ) )
root->style_flags |= FT_STYLE_FLAG_BOLD;
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = 0;
root->bbox.xMin = type1->font_bbox.xMin >> 16;
root->bbox.yMin = type1->font_bbox.yMin >> 16;
/* no `U' suffix here to 0xFFFF! */
root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
/* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
if ( !root->units_per_EM )
root->units_per_EM = 1000;
root->ascender = (FT_Short)( root->bbox.yMax );
root->descender = (FT_Short)( root->bbox.yMin );
root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
if ( root->height < root->ascender - root->descender )
root->height = (FT_Short)( root->ascender - root->descender );
/* now compute the maximum advance width */
root->max_advance_width =
(FT_Short)( root->bbox.xMax );
{
FT_Pos max_advance;
error = T1_Compute_Max_Advance( face, &max_advance );
/* in case of error, keep the standard width */
if ( !error )
root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
else
error = FT_Err_Ok; /* clear error */
}
root->max_advance_height = root->height;
root->underline_position = (FT_Short)info->underline_position;
root->underline_thickness = (FT_Short)info->underline_thickness;
}
{
FT_Face root = &face->root;
if ( psnames )
{
FT_CharMapRec charmap;
T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
FT_CMap_Class clazz;
charmap.face = root;
/* first of all, try to synthesize a Unicode charmap */
charmap.platform_id = TT_PLATFORM_MICROSOFT;
charmap.encoding_id = TT_MS_ID_UNICODE_CS;
charmap.encoding = FT_ENCODING_UNICODE;
error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
if ( error &&
FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
goto Exit;
error = FT_Err_Ok;
/* now, generate an Adobe Standard encoding when appropriate */
charmap.platform_id = TT_PLATFORM_ADOBE;
clazz = NULL;
switch ( type1->encoding_type )
{
case T1_ENCODING_TYPE_STANDARD:
charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
charmap.encoding_id = TT_ADOBE_ID_STANDARD;
clazz = cmap_classes->standard;
break;
case T1_ENCODING_TYPE_EXPERT:
charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
charmap.encoding_id = TT_ADOBE_ID_EXPERT;
clazz = cmap_classes->expert;
break;
case T1_ENCODING_TYPE_ARRAY:
charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
clazz = cmap_classes->custom;
break;
case T1_ENCODING_TYPE_ISOLATIN1:
charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
clazz = cmap_classes->unicode;
break;
default:
;
}
if ( clazz )
error = FT_CMap_New( clazz, NULL, &charmap, NULL );
#if 0
/* Select default charmap */
if (root->num_charmaps)
root->charmap = root->charmaps[0];
#endif
}
}
Exit:
return error;
}
cff_face_init( FT_Stream stream,
FT_Face cffface, /* CFF_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
CFF_Face face = (CFF_Face)cffface;
FT_Error error;
SFNT_Service sfnt;
FT_Service_PsCMaps psnames;
PSHinter_Service pshinter;
FT_Bool pure_cff = 1;
FT_Bool sfnt_format = 0;
FT_Library library = cffface->driver->root.library;
sfnt = (SFNT_Service)FT_Get_Module_Interface(
library, "sfnt" );
if ( !sfnt )
{
FT_ERROR(( "cff_face_init: cannot access `sfnt' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
pshinter = (PSHinter_Service)FT_Get_Module_Interface(
library, "pshinter" );
FT_TRACE2(( "CFF driver\n" ));
/* create input stream from resource */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
/* check whether we have a valid OpenType file */
error = sfnt->init_face( stream, face, face_index, num_params, params );
if ( !error )
{
if ( face->format_tag != TTAG_OTTO ) /* `OTTO'; OpenType/CFF font */
{
FT_TRACE2(( " not an OpenType/CFF font\n" ));
error = FT_THROW( Unknown_File_Format );
goto Exit;
}
/* if we are performing a simple font format check, exit immediately */
if ( face_index < 0 )
return FT_Err_Ok;
sfnt_format = 1;
/* now, the font can be either an OpenType/CFF font, or an SVG CEF */
/* font; in the latter case it doesn't have a `head' table */
error = face->goto_table( face, TTAG_head, stream, 0 );
if ( !error )
{
pure_cff = 0;
/* load font directory */
error = sfnt->load_face( stream, face, face_index,
num_params, params );
if ( error )
goto Exit;
}
else
{
/* load the `cmap' table explicitly */
error = sfnt->load_cmap( face, stream );
if ( error )
goto Exit;
}
/* now load the CFF part of the file */
error = face->goto_table( face, TTAG_CFF, stream, 0 );
if ( error )
goto Exit;
}
else
{
/* rewind to start of file; we are going to load a pure-CFF font */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
error = FT_Err_Ok;
}
/* now load and parse the CFF table in the file */
{
CFF_Font cff = NULL;
CFF_FontRecDict dict;
FT_Memory memory = cffface->memory;
FT_Int32 flags;
FT_UInt i;
if ( FT_NEW( cff ) )
goto Exit;
face->extra.data = cff;
error = cff_font_load( library, stream, face_index, cff, pure_cff );
if ( error )
goto Exit;
cff->pshinter = pshinter;
cff->psnames = psnames;
cffface->face_index = face_index;
/* Complement the root flags with some interesting information. */
/* Note that this is only necessary for pure CFF and CEF fonts; */
/* SFNT based fonts use the `name' table instead. */
cffface->num_glyphs = cff->num_glyphs;
dict = &cff->top_font.font_dict;
/* we need the `PSNames' module for CFF and CEF formats */
/* which aren't CID-keyed */
if ( dict->cid_registry == 0xFFFFU && !psnames )
{
FT_ERROR(( "cff_face_init:"
" cannot open CFF & CEF fonts\n"
" "
" without the `PSNames' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_UInt idx;
FT_String* s;
FT_TRACE4(( "SIDs\n" ));
/* dump string index, including default strings for convenience */
for ( idx = 0; idx < cff->num_strings + 390; idx++ )
{
s = cff_index_get_sid_string( cff, idx );
if ( s )
FT_TRACE4((" %5d %s\n", idx, s ));
}
}
#endif /* FT_DEBUG_LEVEL_TRACE */
if ( !dict->has_font_matrix )
dict->units_per_em = pure_cff ? 1000 : face->root.units_per_EM;
/* Normalize the font matrix so that `matrix->xx' is 1; the */
/* scaling is done with `units_per_em' then (at this point, */
/* it already contains the scaling factor, but without */
/* normalization of the matrix). */
/* */
/* Note that the offsets must be expressed in integer font */
/* units. */
{
FT_Matrix* matrix = &dict->font_matrix;
FT_Vector* offset = &dict->font_offset;
FT_ULong* upm = &dict->units_per_em;
FT_Fixed temp = FT_ABS( matrix->yy );
if ( temp != 0x10000L )
{
*upm = FT_DivFix( *upm, temp );
matrix->xx = FT_DivFix( matrix->xx, temp );
matrix->yx = FT_DivFix( matrix->yx, temp );
matrix->xy = FT_DivFix( matrix->xy, temp );
matrix->yy = FT_DivFix( matrix->yy, temp );
offset->x = FT_DivFix( offset->x, temp );
offset->y = FT_DivFix( offset->y, temp );
}
offset->x >>= 16;
offset->y >>= 16;
}
for ( i = cff->num_subfonts; i > 0; i-- )
{
CFF_FontRecDict sub = &cff->subfonts[i - 1]->font_dict;
CFF_FontRecDict top = &cff->top_font.font_dict;
FT_Matrix* matrix;
FT_Vector* offset;
FT_ULong* upm;
FT_Fixed temp;
if ( sub->has_font_matrix )
{
FT_Long scaling;
/* if we have a top-level matrix, */
/* concatenate the subfont matrix */
if ( top->has_font_matrix )
{
if ( top->units_per_em > 1 && sub->units_per_em > 1 )
scaling = FT_MIN( top->units_per_em, sub->units_per_em );
else
scaling = 1;
FT_Matrix_Multiply_Scaled( &top->font_matrix,
&sub->font_matrix,
scaling );
FT_Vector_Transform_Scaled( &sub->font_offset,
&top->font_matrix,
scaling );
sub->units_per_em = FT_MulDiv( sub->units_per_em,
top->units_per_em,
scaling );
}
}
else
{
sub->font_matrix = top->font_matrix;
sub->font_offset = top->font_offset;
sub->units_per_em = top->units_per_em;
}
matrix = &sub->font_matrix;
offset = &sub->font_offset;
upm = &sub->units_per_em;
temp = FT_ABS( matrix->yy );
if ( temp != 0x10000L )
{
*upm = FT_DivFix( *upm, temp );
matrix->xx = FT_DivFix( matrix->xx, temp );
matrix->yx = FT_DivFix( matrix->yx, temp );
matrix->xy = FT_DivFix( matrix->xy, temp );
matrix->yy = FT_DivFix( matrix->yy, temp );
offset->x = FT_DivFix( offset->x, temp );
offset->y = FT_DivFix( offset->y, temp );
}
offset->x >>= 16;
offset->y >>= 16;
}
if ( pure_cff )
{
char* style_name = NULL;
/* set up num_faces */
cffface->num_faces = cff->num_faces;
/* compute number of glyphs */
if ( dict->cid_registry != 0xFFFFU )
cffface->num_glyphs = cff->charset.max_cid + 1;
else
cffface->num_glyphs = cff->charstrings_index.count;
/* set global bbox, as well as EM size */
cffface->bbox.xMin = dict->font_bbox.xMin >> 16;
cffface->bbox.yMin = dict->font_bbox.yMin >> 16;
/* no `U' suffix here to 0xFFFF! */
cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFF ) >> 16;
cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFF ) >> 16;
cffface->units_per_EM = (FT_UShort)( dict->units_per_em );
cffface->ascender = (FT_Short)( cffface->bbox.yMax );
cffface->descender = (FT_Short)( cffface->bbox.yMin );
cffface->height = (FT_Short)( ( cffface->units_per_EM * 12 ) / 10 );
if ( cffface->height < cffface->ascender - cffface->descender )
cffface->height = (FT_Short)( cffface->ascender - cffface->descender );
cffface->underline_position =
(FT_Short)( dict->underline_position >> 16 );
cffface->underline_thickness =
(FT_Short)( dict->underline_thickness >> 16 );
/* retrieve font family & style name */
cffface->family_name = cff_index_get_name( cff, face_index );
if ( cffface->family_name )
{
char* full = cff_index_get_sid_string( cff,
dict->full_name );
char* fullp = full;
char* family = cffface->family_name;
char* family_name = NULL;
remove_subset_prefix( cffface->family_name );
if ( dict->family_name )
{
family_name = cff_index_get_sid_string( cff,
dict->family_name );
if ( family_name )
family = family_name;
}
/* We try to extract the style name from the full name. */
/* We need to ignore spaces and dashes during the search. */
if ( full && family )
{
while ( *fullp )
{
/* skip common characters at the start of both strings */
if ( *fullp == *family )
{
family++;
fullp++;
continue;
}
/* ignore spaces and dashes in full name during comparison */
if ( *fullp == ' ' || *fullp == '-' )
{
fullp++;
continue;
}
/* ignore spaces and dashes in family name during comparison */
if ( *family == ' ' || *family == '-' )
{
family++;
continue;
}
if ( !*family && *fullp )
{
/* The full name begins with the same characters as the */
/* family name, with spaces and dashes removed. In this */
/* case, the remaining string in `fullp' will be used as */
/* the style name. */
style_name = cff_strcpy( memory, fullp );
/* remove the style part from the family name (if present) */
remove_style( cffface->family_name, style_name );
}
break;
}
}
}
else
{
char *cid_font_name =
cff_index_get_sid_string( cff,
dict->cid_font_name );
/* do we have a `/FontName' for a CID-keyed font? */
if ( cid_font_name )
cffface->family_name = cff_strcpy( memory, cid_font_name );
}
if ( style_name )
cffface->style_name = style_name;
else
/* assume "Regular" style if we don't know better */
cffface->style_name = cff_strcpy( memory, (char *)"Regular" );
/*******************************************************************/
/* */
/* Compute face flags. */
/* */
flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */
FT_FACE_FLAG_HORIZONTAL | /* horizontal data */
FT_FACE_FLAG_HINTER; /* has native hinter */
if ( sfnt_format )
flags |= FT_FACE_FLAG_SFNT;
/* fixed width font? */
if ( dict->is_fixed_pitch )
flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */
#if 0
/* kerning available? */
if ( face->kern_pairs )
flags |= FT_FACE_FLAG_KERNING;
#endif
cffface->face_flags |= flags;
/*******************************************************************/
/* */
/* Compute style flags. */
/* */
flags = 0;
if ( dict->italic_angle )
flags |= FT_STYLE_FLAG_ITALIC;
{
char *weight = cff_index_get_sid_string( cff,
dict->weight );
if ( weight )
if ( !ft_strcmp( weight, "Bold" ) ||
!ft_strcmp( weight, "Black" ) )
flags |= FT_STYLE_FLAG_BOLD;
}
/* double check */
if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name )
if ( !ft_strncmp( cffface->style_name, "Bold", 4 ) ||
!ft_strncmp( cffface->style_name, "Black", 5 ) )
flags |= FT_STYLE_FLAG_BOLD;
cffface->style_flags = flags;
}
#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
/* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */
/* has unset this flag because of the 3.0 `post' table. */
if ( dict->cid_registry == 0xFFFFU )
cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif
if ( dict->cid_registry != 0xFFFFU && pure_cff )
cffface->face_flags |= FT_FACE_FLAG_CID_KEYED;
/*******************************************************************/
/* */
/* Compute char maps. */
/* */
/* Try to synthesize a Unicode charmap if there is none available */
/* already. If an OpenType font contains a Unicode "cmap", we */
/* will use it, whatever be in the CFF part of the file. */
{
FT_CharMapRec cmaprec;
FT_CharMap cmap;
FT_UInt nn;
CFF_Encoding encoding = &cff->encoding;
for ( nn = 0; nn < (FT_UInt)cffface->num_charmaps; nn++ )
{
cmap = cffface->charmaps[nn];
/* Windows Unicode? */
if ( cmap->platform_id == TT_PLATFORM_MICROSOFT &&
cmap->encoding_id == TT_MS_ID_UNICODE_CS )
goto Skip_Unicode;
/* Apple Unicode platform id? */
if ( cmap->platform_id == TT_PLATFORM_APPLE_UNICODE )
goto Skip_Unicode; /* Apple Unicode */
}
/* since CID-keyed fonts don't contain glyph names, we can't */
/* construct a cmap */
if ( pure_cff && cff->top_font.font_dict.cid_registry != 0xFFFFU )
goto Exit;
#ifdef FT_MAX_CHARMAP_CACHEABLE
if ( nn + 1 > FT_MAX_CHARMAP_CACHEABLE )
{
FT_ERROR(( "cff_face_init: no Unicode cmap is found, "
"and too many subtables (%d) to add synthesized cmap\n",
nn ));
goto Exit;
}
#endif
/* we didn't find a Unicode charmap -- synthesize one */
cmaprec.face = cffface;
cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
cmaprec.encoding = FT_ENCODING_UNICODE;
nn = (FT_UInt)cffface->num_charmaps;
error = FT_CMap_New( &CFF_CMAP_UNICODE_CLASS_REC_GET, NULL,
&cmaprec, NULL );
if ( error &&
FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
goto Exit;
error = FT_Err_Ok;
/* if no Unicode charmap was previously selected, select this one */
if ( cffface->charmap == NULL && nn != (FT_UInt)cffface->num_charmaps )
cffface->charmap = cffface->charmaps[nn];
Skip_Unicode:
#ifdef FT_MAX_CHARMAP_CACHEABLE
if ( nn > FT_MAX_CHARMAP_CACHEABLE )
{
FT_ERROR(( "cff_face_init: Unicode cmap is found, "
"but too many preceding subtables (%d) to access\n",
nn - 1 ));
goto Exit;
}
#endif
if ( encoding->count > 0 )
{
FT_CMap_Class clazz;
cmaprec.face = cffface;
cmaprec.platform_id = TT_PLATFORM_ADOBE; /* Adobe platform id */
if ( encoding->offset == 0 )
{
cmaprec.encoding_id = TT_ADOBE_ID_STANDARD;
cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD;
clazz = &CFF_CMAP_ENCODING_CLASS_REC_GET;
}
else if ( encoding->offset == 1 )
{
cmaprec.encoding_id = TT_ADOBE_ID_EXPERT;
cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT;
clazz = &CFF_CMAP_ENCODING_CLASS_REC_GET;
}
else
{
cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM;
cmaprec.encoding = FT_ENCODING_ADOBE_CUSTOM;
clazz = &CFF_CMAP_ENCODING_CLASS_REC_GET;
}
error = FT_CMap_New( clazz, NULL, &cmaprec, NULL );
}
}
}
Exit:
return error;
}
T1_New_Parser( T1_Parser parser,
FT_Stream stream,
FT_Memory memory,
PSAux_Service psaux )
{
FT_Error error;
FT_UShort tag;
FT_ULong size;
psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );
parser->stream = stream;
parser->base_len = 0;
parser->base_dict = 0;
parser->private_len = 0;
parser->private_dict = 0;
parser->in_pfb = 0;
parser->in_memory = 0;
parser->single_block = 0;
/* check the header format */
error = check_type1_format( stream, "%!PS-AdobeFont", 14 );
if ( error )
{
if ( FT_ERR_NEQ( error, Unknown_File_Format ) )
goto Exit;
error = check_type1_format( stream, "%!FontType", 10 );
if ( error )
{
FT_TRACE2(( " not a Type 1 font\n" ));
goto Exit;
}
}
/******************************************************************/
/* */
/* Here a short summary of what is going on: */
/* */
/* When creating a new Type 1 parser, we try to locate and load */
/* the base dictionary if this is possible (i.e., for PFB */
/* files). Otherwise, we load the whole font into memory. */
/* */
/* When `loading' the base dictionary, we only setup pointers */
/* in the case of a memory-based stream. Otherwise, we */
/* allocate and load the base dictionary in it. */
/* */
/* parser->in_pfb is set if we are in a binary (`.pfb') font. */
/* parser->in_memory is set if we have a memory stream. */
/* */
/* try to compute the size of the base dictionary; */
/* look for a Postscript binary file tag, i.e., 0x8001 */
if ( FT_STREAM_SEEK( 0L ) )
goto Exit;
error = read_pfb_tag( stream, &tag, &size );
if ( error )
goto Exit;
if ( tag != 0x8001U )
{
/* assume that this is a PFA file for now; an error will */
/* be produced later when more things are checked */
if ( FT_STREAM_SEEK( 0L ) )
goto Exit;
size = stream->size;
}
else
parser->in_pfb = 1;
/* now, try to load `size' bytes of the `base' dictionary we */
/* found previously */
/* if it is a memory-based resource, set up pointers */
if ( !stream->read )
{
parser->base_dict = (FT_Byte*)stream->base + stream->pos;
parser->base_len = size;
parser->in_memory = 1;
/* check that the `size' field is valid */
if ( FT_STREAM_SKIP( size ) )
goto Exit;
}
else
{
/* read segment in memory -- this is clumsy, but so does the format */
if ( FT_ALLOC( parser->base_dict, size ) ||
FT_STREAM_READ( parser->base_dict, size ) )
goto Exit;
parser->base_len = size;
}
parser->root.base = parser->base_dict;
parser->root.cursor = parser->base_dict;
parser->root.limit = parser->root.cursor + parser->base_len;
Exit:
if ( error && !parser->in_memory )
FT_FREE( parser->base_dict );
return error;
}
/*
* This function tries to load a small bitmap within a given FTC_SNode.
* Note that it returns a non-zero error code _only_ in the case of
* out-of-memory condition. For all other errors (e.g., corresponding
* to a bad font file), this function will mark the sbit as `unavailable'
* and return a value of 0.
*
* You should also read the comment within the @ftc_snode_compare
* function below to see how out-of-memory is handled during a lookup.
*/
static FT_Error
ftc_snode_load( FTC_SNode snode,
FTC_Manager manager,
FT_UInt gindex,
FT_ULong *asize )
{
FT_Error error;
FTC_GNode gnode = FTC_GNODE( snode );
FTC_Family family = gnode->family;
FT_Memory memory = manager->memory;
FT_Face face;
FTC_SBit sbit;
FTC_SFamilyClass clazz;
if ( (FT_UInt)(gindex - gnode->gindex) >= snode->count )
{
FT_ERROR(( "ftc_snode_load: invalid glyph index" ));
return FT_THROW( Invalid_Argument );
}
sbit = snode->sbits + ( gindex - gnode->gindex );
clazz = (FTC_SFamilyClass)family->clazz;
sbit->buffer = 0;
error = clazz->family_load_glyph( family, gindex, manager, &face );
if ( error )
goto BadGlyph;
{
FT_Int temp;
FT_GlyphSlot slot = face->glyph;
FT_Bitmap* bitmap = &slot->bitmap;
FT_Pos xadvance, yadvance; /* FT_GlyphSlot->advance.{x|y} */
if ( slot->format != FT_GLYPH_FORMAT_BITMAP )
{
FT_TRACE0(( "ftc_snode_load:"
" glyph loaded didn't return a bitmap\n" ));
goto BadGlyph;
}
/* Check whether our values fit into 8-bit containers! */
/* If this is not the case, our bitmap is too large */
/* and we will leave it as `missing' with sbit.buffer = 0 */
#define CHECK_CHAR( d ) ( temp = (FT_Char)d, (FT_Int) temp == (FT_Int) d )
#define CHECK_BYTE( d ) ( temp = (FT_Byte)d, (FT_UInt)temp == (FT_UInt)d )
/* horizontal advance in pixels */
xadvance = ( slot->advance.x + 32 ) >> 6;
yadvance = ( slot->advance.y + 32 ) >> 6;
if ( !CHECK_BYTE( bitmap->rows ) ||
!CHECK_BYTE( bitmap->width ) ||
!CHECK_CHAR( bitmap->pitch ) ||
!CHECK_CHAR( slot->bitmap_left ) ||
!CHECK_CHAR( slot->bitmap_top ) ||
!CHECK_CHAR( xadvance ) ||
!CHECK_CHAR( yadvance ) )
{
FT_TRACE2(( "ftc_snode_load:"
" glyph too large for small bitmap cache\n"));
goto BadGlyph;
}
sbit->width = (FT_Byte)bitmap->width;
sbit->height = (FT_Byte)bitmap->rows;
sbit->pitch = (FT_Char)bitmap->pitch;
sbit->left = (FT_Char)slot->bitmap_left;
sbit->top = (FT_Char)slot->bitmap_top;
sbit->xadvance = (FT_Char)xadvance;
sbit->yadvance = (FT_Char)yadvance;
sbit->format = (FT_Byte)bitmap->pixel_mode;
sbit->max_grays = (FT_Byte)(bitmap->num_grays - 1);
/* copy the bitmap into a new buffer -- ignore error */
error = ftc_sbit_copy_bitmap( sbit, bitmap, memory );
/* now, compute size */
if ( asize )
*asize = (FT_ULong)FT_ABS( sbit->pitch ) * sbit->height;
} /* glyph loading successful */
/* ignore the errors that might have occurred -- */
/* we mark unloaded glyphs with `sbit.buffer == 0' */
/* and `width == 255', `height == 0' */
/* */
if ( error && FT_ERR_NEQ( error, Out_Of_Memory ) )
{
BadGlyph:
sbit->width = 255;
sbit->height = 0;
sbit->buffer = NULL;
error = FT_Err_Ok;
if ( asize )
*asize = 0;
}
return error;
}
T42_Face_Init( FT_Stream stream,
FT_Face t42face, /* T42_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
T42_Face face = (T42_Face)t42face;
FT_Error error;
FT_Service_PsCMaps psnames;
PSAux_Service psaux;
FT_Face root = (FT_Face)&face->root;
T1_Font type1 = &face->type1;
PS_FontInfo info = &type1->font_info;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( stream );
face->ttf_face = NULL;
face->root.num_faces = 1;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
face->psnames = psnames;
face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psaux" );
psaux = (PSAux_Service)face->psaux;
if ( !psaux )
{
FT_ERROR(( "T42_Face_Init: cannot access `psaux' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
FT_TRACE2(( "Type 42 driver\n" ));
/* open the tokenizer, this will also check the font format */
error = T42_Open_Face( face );
if ( error )
goto Exit;
/* if we just wanted to check the format, leave successfully now */
if ( face_index < 0 )
goto Exit;
/* check the face index */
if ( face_index > 0 )
{
FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
/* Now load the font program into the face object */
/* Init the face object fields */
/* Now set up root face fields */
root->num_glyphs = type1->num_glyphs;
root->num_charmaps = 0;
root->face_index = 0;
root->face_flags |= FT_FACE_FLAG_SCALABLE |
FT_FACE_FLAG_HORIZONTAL |
FT_FACE_FLAG_GLYPH_NAMES;
if ( info->is_fixed_pitch )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* We only set this flag if we have the patented bytecode interpreter. */
/* There are no known `tricky' Type42 fonts that could be loaded with */
/* the unpatented interpreter. */
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
root->face_flags |= FT_FACE_FLAG_HINTER;
#endif
/* XXX: TODO -- add kerning with .afm support */
/* get style name -- be careful, some broken fonts only */
/* have a `/FontName' dictionary entry! */
root->family_name = info->family_name;
/* assume "Regular" style if we don't know better */
root->style_name = (char *)"Regular";
if ( root->family_name )
{
char* full = info->full_name;
char* family = root->family_name;
if ( full )
{
while ( *full )
{
if ( *full == *family )
{
family++;
full++;
}
else
{
if ( *full == ' ' || *full == '-' )
full++;
else if ( *family == ' ' || *family == '-' )
family++;
else
{
if ( !*family )
root->style_name = full;
break;
}
}
}
}
}
else
{
/* do we have a `/FontName'? */
if ( type1->font_name )
root->family_name = type1->font_name;
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = 0;
/* Load the TTF font embedded in the T42 font */
{
FT_Open_Args args;
args.flags = FT_OPEN_MEMORY | FT_OPEN_DRIVER;
args.driver = FT_Get_Module( FT_FACE_LIBRARY( face ),
"truetype" );
args.memory_base = face->ttf_data;
args.memory_size = face->ttf_size;
if ( num_params )
{
args.flags |= FT_OPEN_PARAMS;
args.num_params = num_params;
args.params = params;
}
error = FT_Open_Face( FT_FACE_LIBRARY( face ),
&args, 0, &face->ttf_face );
}
if ( error )
goto Exit;
FT_Done_Size( face->ttf_face->size );
/* Ignore info in FontInfo dictionary and use the info from the */
/* loaded TTF font. The PostScript interpreter also ignores it. */
root->bbox = face->ttf_face->bbox;
root->units_per_EM = face->ttf_face->units_per_EM;
root->ascender = face->ttf_face->ascender;
root->descender = face->ttf_face->descender;
root->height = face->ttf_face->height;
root->max_advance_width = face->ttf_face->max_advance_width;
root->max_advance_height = face->ttf_face->max_advance_height;
root->underline_position = (FT_Short)info->underline_position;
root->underline_thickness = (FT_Short)info->underline_thickness;
/* compute style flags */
root->style_flags = 0;
if ( info->italic_angle )
root->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
root->style_flags |= FT_STYLE_FLAG_BOLD;
if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
root->face_flags |= FT_FACE_FLAG_VERTICAL;
{
if ( psnames )
{
FT_CharMapRec charmap;
T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
FT_CMap_Class clazz;
charmap.face = root;
/* first of all, try to synthesize a Unicode charmap */
charmap.platform_id = TT_PLATFORM_MICROSOFT;
charmap.encoding_id = TT_MS_ID_UNICODE_CS;
charmap.encoding = FT_ENCODING_UNICODE;
error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
if ( error &&
FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
goto Exit;
error = FT_Err_Ok;
/* now, generate an Adobe Standard encoding when appropriate */
charmap.platform_id = TT_PLATFORM_ADOBE;
clazz = NULL;
switch ( type1->encoding_type )
{
case T1_ENCODING_TYPE_STANDARD:
charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
charmap.encoding_id = TT_ADOBE_ID_STANDARD;
clazz = cmap_classes->standard;
break;
case T1_ENCODING_TYPE_EXPERT:
charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
charmap.encoding_id = TT_ADOBE_ID_EXPERT;
clazz = cmap_classes->expert;
break;
case T1_ENCODING_TYPE_ARRAY:
charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
clazz = cmap_classes->custom;
break;
case T1_ENCODING_TYPE_ISOLATIN1:
charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
clazz = cmap_classes->unicode;
break;
default:
;
}
if ( clazz )
error = FT_CMap_New( clazz, NULL, &charmap, NULL );
#if 0
/* Select default charmap */
if ( root->num_charmaps )
root->charmap = root->charmaps[0];
#endif
}
}
Exit:
return error;
}
tt_face_init( FT_Stream stream,
FT_Face ttface, /* TT_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
FT_Error error;
FT_Library library;
SFNT_Service sfnt;
TT_Face face = (TT_Face)ttface;
FT_TRACE2(( "TTF driver\n" ));
library = ttface->driver->root.library;
sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
if ( !sfnt )
{
FT_ERROR(( "tt_face_init: cannot access `sfnt' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
/* create input stream from resource */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
/* check that we have a valid TrueType file */
FT_TRACE2(( " " ));
error = sfnt->init_face( stream, face, face_index, num_params, params );
/* Stream may have changed. */
stream = face->root.stream;
if ( error )
goto Exit;
/* We must also be able to accept Mac/GX fonts, as well as OT ones. */
/* The 0x00020000 tag is completely undocumented; some fonts from */
/* Arphic made for Chinese Windows 3.1 have this. */
if ( face->format_tag != 0x00010000L && /* MS fonts */
face->format_tag != 0x00020000L && /* CJK fonts for Win 3.1 */
face->format_tag != TTAG_true && /* Mac fonts */
face->format_tag != TTAG_0xA5kbd && /* `Keyboard.dfont' (legacy Mac OS X) */
face->format_tag != TTAG_0xA5lst ) /* `LastResort.dfont' (legacy Mac OS X) */
{
FT_TRACE2(( " not a TTF font\n" ));
goto Bad_Format;
}
#ifdef TT_USE_BYTECODE_INTERPRETER
ttface->face_flags |= FT_FACE_FLAG_HINTER;
#endif
/* If we are performing a simple font format check, exit immediately. */
if ( face_index < 0 )
return FT_Err_Ok;
/* Load font directory */
error = sfnt->load_face( stream, face, face_index, num_params, params );
if ( error )
goto Exit;
if ( tt_check_trickyness( ttface ) )
ttface->face_flags |= FT_FACE_FLAG_TRICKY;
error = tt_face_load_hdmx( face, stream );
if ( error )
goto Exit;
if ( FT_IS_SCALABLE( ttface ) )
{
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( !ttface->internal->incremental_interface )
#endif
{
error = tt_face_load_loca( face, stream );
/* having a (non-zero) `glyf' table without */
/* a `loca' table is not valid */
if ( face->glyf_len && FT_ERR_EQ( error, Table_Missing ) )
goto Exit;
if ( error )
goto Exit;
}
/* `fpgm', `cvt', and `prep' are optional */
error = tt_face_load_cvt( face, stream );
if ( error && FT_ERR_NEQ( error, Table_Missing ) )
goto Exit;
error = tt_face_load_fpgm( face, stream );
if ( error && FT_ERR_NEQ( error, Table_Missing ) )
goto Exit;
error = tt_face_load_prep( face, stream );
if ( error && FT_ERR_NEQ( error, Table_Missing ) )
goto Exit;
/* Check the scalable flag based on `loca'. */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( !ttface->internal->incremental_interface )
#endif
{
if ( ttface->num_fixed_sizes &&
face->glyph_locations &&
tt_check_single_notdef( ttface ) )
{
FT_TRACE5(( "tt_face_init:"
" Only the `.notdef' glyph has an outline.\n"
" "
" Resetting scalable flag to FALSE.\n" ));
ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
}
}
}
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
{
FT_Int instance_index = face_index >> 16;
if ( FT_HAS_MULTIPLE_MASTERS( ttface ) &&
instance_index > 0 )
{
error = TT_Get_MM_Var( face, NULL );
if ( error )
goto Exit;
if ( face->blend->mmvar->namedstyle )
{
FT_Memory memory = ttface->memory;
FT_Var_Named_Style* named_style;
FT_String* style_name;
/* in `face_index', the instance index starts with value 1 */
named_style = face->blend->mmvar->namedstyle + instance_index - 1;
error = sfnt->get_name( face,
(FT_UShort)named_style->strid,
&style_name );
if ( error )
goto Exit;
/* set style name; if already set, replace it */
if ( face->root.style_name )
FT_FREE( face->root.style_name );
face->root.style_name = style_name;
/* finally, select the named instance */
error = TT_Set_Var_Design( face,
face->blend->mmvar->num_axis,
named_style->coords );
if ( error )
goto Exit;
tt_apply_mvar( face );
}
}
}
#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
/* initialize standard glyph loading routines */
TT_Init_Glyph_Loading( face );
Exit:
return error;
Bad_Format:
error = FT_THROW( Unknown_File_Format );
goto Exit;
}
sfnt_load_face( FT_Stream stream,
TT_Face face,
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
FT_Error error;
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
FT_Error psnames_error;
#endif
FT_Bool has_outline;
FT_Bool is_apple_sbit;
FT_Bool ignore_preferred_family = FALSE;
FT_Bool ignore_preferred_subfamily = FALSE;
SFNT_Service sfnt = (SFNT_Service)face->sfnt;
FT_UNUSED( face_index );
/* Check parameters */
{
FT_Int i;
for ( i = 0; i < num_params; i++ )
{
if ( params[i].tag == FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY )
ignore_preferred_family = TRUE;
else if ( params[i].tag == FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY )
ignore_preferred_subfamily = TRUE;
}
}
/* Load tables */
/* We now support two SFNT-based bitmapped font formats. They */
/* are recognized easily as they do not include a `glyf' */
/* table. */
/* */
/* The first format comes from Apple, and uses a table named */
/* `bhed' instead of `head' to store the font header (using */
/* the same format). It also doesn't include horizontal and */
/* vertical metrics tables (i.e. `hhea' and `vhea' tables are */
/* missing). */
/* */
/* The other format comes from Microsoft, and is used with */
/* WinCE/PocketPC. It looks like a standard TTF, except that */
/* it doesn't contain outlines. */
/* */
FT_TRACE2(( "sfnt_load_face: %08p\n\n", face ));
/* do we have outlines in there? */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
has_outline = FT_BOOL( face->root.internal->incremental_interface != 0 ||
tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
tt_face_lookup_table( face, TTAG_CFF ) != 0 );
#else
has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
tt_face_lookup_table( face, TTAG_CFF ) != 0 );
#endif
is_apple_sbit = 0;
/* if this font doesn't contain outlines, we try to load */
/* a `bhed' table */
if ( !has_outline && sfnt->load_bhed )
{
LOAD_( bhed );
is_apple_sbit = FT_BOOL( !error );
}
/* load the font header (`head' table) if this isn't an Apple */
/* sbit font file */
if ( !is_apple_sbit )
{
LOAD_( head );
if ( error )
goto Exit;
}
if ( face->header.Units_Per_EM == 0 )
{
error = FT_THROW( Invalid_Table );
goto Exit;
}
/* the following tables are often not present in embedded TrueType */
/* fonts within PDF documents, so don't check for them. */
LOAD_( maxp );
LOAD_( cmap );
/* the following tables are optional in PCL fonts -- */
/* don't check for errors */
LOAD_( name );
LOAD_( post );
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
psnames_error = error;
#endif
/* do not load the metrics headers and tables if this is an Apple */
/* sbit font file */
if ( !is_apple_sbit )
{
/* load the `hhea' and `hmtx' tables */
LOADM_( hhea, 0 );
if ( !error )
{
LOADM_( hmtx, 0 );
if ( FT_ERR_EQ( error, Table_Missing ) )
{
error = FT_THROW( Hmtx_Table_Missing );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* If this is an incrementally loaded font and there are */
/* overriding metrics, tolerate a missing `hmtx' table. */
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->
get_glyph_metrics )
{
face->horizontal.number_Of_HMetrics = 0;
error = FT_Err_Ok;
}
#endif
}
}
else if ( FT_ERR_EQ( error, Table_Missing ) )
{
/* No `hhea' table necessary for SFNT Mac fonts. */
if ( face->format_tag == TTAG_true )
{
FT_TRACE2(( "This is an SFNT Mac font.\n" ));
has_outline = 0;
error = FT_Err_Ok;
}
else
{
error = FT_THROW( Horiz_Header_Missing );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* If this is an incrementally loaded font and there are */
/* overriding metrics, tolerate a missing `hhea' table. */
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->
get_glyph_metrics )
{
face->horizontal.number_Of_HMetrics = 0;
error = FT_Err_Ok;
}
#endif
}
}
if ( error )
goto Exit;
/* try to load the `vhea' and `vmtx' tables */
LOADM_( hhea, 1 );
if ( !error )
{
LOADM_( hmtx, 1 );
if ( !error )
face->vertical_info = 1;
}
if ( error && FT_ERR_NEQ( error, Table_Missing ) )
goto Exit;
LOAD_( os2 );
if ( error )
{
/* we treat the table as missing if there are any errors */
face->os2.version = 0xFFFFU;
}
}
/* the optional tables */
/* embedded bitmap support */
if ( sfnt->load_eblc )
{
LOAD_( eblc );
if ( error )
{
/* a font which contains neither bitmaps nor outlines is */
/* still valid (although rather useless in most cases); */
/* however, you can find such stripped fonts in PDFs */
if ( FT_ERR_EQ( error, Table_Missing ) )
error = FT_Err_Ok;
else
goto Exit;
}
}
LOAD_( pclt );
if ( error )
{
if ( FT_ERR_NEQ( error, Table_Missing ) )
goto Exit;
face->pclt.Version = 0;
}
/* consider the kerning and gasp tables as optional */
LOAD_( gasp );
LOAD_( kern );
face->root.num_glyphs = face->max_profile.numGlyphs;
/* FreeType don't have generalized method which distinguish Arial Black from Arial. */
/* In our QtWebKit for Windows FreeType edition, the problem cause using Arial Black font */
/* when a content have "font-family: Arial". */
/* The Arial problem due to Arial and Arial Black return "Arial" as preferred family. */
/* We read font family, not preferred family, for the workaround. */
/* The newer freetype have ignore preferred option. */
/* The optiom may fix this bug, but you should consider WWS family. */
GET_NAME( FONT_FAMILY, &face->root.family_name );
GET_NAME( FONT_SUBFAMILY, &face->root.style_name );
/* now set up root fields */
{
FT_Face root = &face->root;
FT_Long flags = root->face_flags;
/*********************************************************************/
/* */
/* Compute face flags. */
/* */
if ( has_outline == TRUE )
flags |= FT_FACE_FLAG_SCALABLE; /* scalable outlines */
/* The sfnt driver only supports bitmap fonts natively, thus we */
/* don't set FT_FACE_FLAG_HINTER. */
flags |= FT_FACE_FLAG_SFNT | /* SFNT file format */
FT_FACE_FLAG_HORIZONTAL; /* horizontal data */
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
if ( !psnames_error &&
face->postscript.FormatType != 0x00030000L )
flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif
/* fixed width font? */
if ( face->postscript.isFixedPitch )
flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* vertical information? */
if ( face->vertical_info )
flags |= FT_FACE_FLAG_VERTICAL;
/* kerning available ? */
if ( TT_FACE_HAS_KERNING( face ) )
flags |= FT_FACE_FLAG_KERNING;
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
/* Don't bother to load the tables unless somebody asks for them. */
/* No need to do work which will (probably) not be used. */
if ( tt_face_lookup_table( face, TTAG_glyf ) != 0 &&
tt_face_lookup_table( face, TTAG_fvar ) != 0 &&
tt_face_lookup_table( face, TTAG_gvar ) != 0 )
flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
#endif
root->face_flags = flags;
/*********************************************************************/
/* */
/* Compute style flags. */
/* */
flags = 0;
if ( has_outline == TRUE && face->os2.version != 0xFFFFU )
{
/* We have an OS/2 table; use the `fsSelection' field. Bit 9 */
/* indicates an oblique font face. This flag has been */
/* introduced in version 1.5 of the OpenType specification. */
if ( face->os2.fsSelection & 512 ) /* bit 9 */
flags |= FT_STYLE_FLAG_ITALIC;
else if ( face->os2.fsSelection & 1 ) /* bit 0 */
flags |= FT_STYLE_FLAG_ITALIC;
if ( face->os2.fsSelection & 32 ) /* bit 5 */
flags |= FT_STYLE_FLAG_BOLD;
}
else
{
/* this is an old Mac font, use the header field */
if ( face->header.Mac_Style & 1 )
flags |= FT_STYLE_FLAG_BOLD;
if ( face->header.Mac_Style & 2 )
flags |= FT_STYLE_FLAG_ITALIC;
}
root->style_flags = flags;
/*********************************************************************/
/* */
/* Polish the charmaps. */
/* */
/* Try to set the charmap encoding according to the platform & */
/* encoding ID of each charmap. */
/* */
tt_face_build_cmaps( face ); /* ignore errors */
/* set the encoding fields */
{
FT_Int m;
for ( m = 0; m < root->num_charmaps; m++ )
{
FT_CharMap charmap = root->charmaps[m];
charmap->encoding = sfnt_find_encoding( charmap->platform_id,
charmap->encoding_id );
#if 0
if ( root->charmap == NULL &&
charmap->encoding == FT_ENCODING_UNICODE )
{
/* set 'root->charmap' to the first Unicode encoding we find */
root->charmap = charmap;
}
#endif
}
}
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
/*
* Now allocate the root array of FT_Bitmap_Size records and
* populate them. Unfortunately, it isn't possible to indicate bit
* depths in the FT_Bitmap_Size record. This is a design error.
*/
{
FT_UInt i, count;
count = face->sbit_num_strikes;
if ( count > 0 )
{
FT_Memory memory = face->root.stream->memory;
FT_UShort em_size = face->header.Units_Per_EM;
FT_Short avgwidth = face->os2.xAvgCharWidth;
FT_Size_Metrics metrics;
if ( em_size == 0 || face->os2.version == 0xFFFFU )
{
avgwidth = 0;
em_size = 1;
}
if ( FT_NEW_ARRAY( root->available_sizes, count ) )
goto Exit;
for ( i = 0; i < count; i++ )
{
FT_Bitmap_Size* bsize = root->available_sizes + i;
error = sfnt->load_strike_metrics( face, i, &metrics );
if ( error )
goto Exit;
bsize->height = (FT_Short)( metrics.height >> 6 );
bsize->width = (FT_Short)(
( avgwidth * metrics.x_ppem + em_size / 2 ) / em_size );
bsize->x_ppem = metrics.x_ppem << 6;
bsize->y_ppem = metrics.y_ppem << 6;
/* assume 72dpi */
bsize->size = metrics.y_ppem << 6;
}
root->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
root->num_fixed_sizes = (FT_Int)count;
}
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
/* a font with no bitmaps and no outlines is scalable; */
/* it has only empty glyphs then */
if ( !FT_HAS_FIXED_SIZES( root ) && !FT_IS_SCALABLE( root ) )
root->face_flags |= FT_FACE_FLAG_SCALABLE;
/*********************************************************************/
/* */
/* Set up metrics. */
/* */
if ( FT_IS_SCALABLE( root ) )
{
/* XXX What about if outline header is missing */
/* (e.g. sfnt wrapped bitmap)? */
root->bbox.xMin = face->header.xMin;
root->bbox.yMin = face->header.yMin;
root->bbox.xMax = face->header.xMax;
root->bbox.yMax = face->header.yMax;
root->units_per_EM = face->header.Units_Per_EM;
/* XXX: Computing the ascender/descender/height is very different */
/* from what the specification tells you. Apparently, we */
/* must be careful because */
/* */
/* - not all fonts have an OS/2 table; in this case, we take */
/* the values in the horizontal header. However, these */
/* values very often are not reliable. */
/* */
/* - otherwise, the correct typographic values are in the */
/* sTypoAscender, sTypoDescender & sTypoLineGap fields. */
/* */
/* However, certain fonts have these fields set to 0. */
/* Rather, they have usWinAscent & usWinDescent correctly */
/* set (but with different values). */
/* */
/* As an example, Arial Narrow is implemented through four */
/* files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */
/* */
/* Strangely, all fonts have the same values in their */
/* sTypoXXX fields, except ARIALNB which sets them to 0. */
/* */
/* On the other hand, they all have different */
/* usWinAscent/Descent values -- as a conclusion, the OS/2 */
/* table cannot be used to compute the text height reliably! */
/* */
/* The ascender and descender are taken from the `hhea' table. */
/* If zero, they are taken from the `OS/2' table. */
root->ascender = face->horizontal.Ascender;
root->descender = face->horizontal.Descender;
root->height = (FT_Short)( root->ascender - root->descender +
face->horizontal.Line_Gap );
if ( !( root->ascender || root->descender ) )
{
if ( face->os2.version != 0xFFFFU )
{
if ( face->os2.sTypoAscender || face->os2.sTypoDescender )
{
root->ascender = face->os2.sTypoAscender;
root->descender = face->os2.sTypoDescender;
root->height = (FT_Short)( root->ascender - root->descender +
face->os2.sTypoLineGap );
}
else
{
root->ascender = (FT_Short)face->os2.usWinAscent;
root->descender = -(FT_Short)face->os2.usWinDescent;
root->height = (FT_UShort)( root->ascender - root->descender );
}
}
}
root->max_advance_width = face->horizontal.advance_Width_Max;
root->max_advance_height = (FT_Short)( face->vertical_info
? face->vertical.advance_Height_Max
: root->height );
/* See http://www.microsoft.com/OpenType/OTSpec/post.htm -- */
/* Adjust underline position from top edge to centre of */
/* stroke to convert TrueType meaning to FreeType meaning. */
root->underline_position = face->postscript.underlinePosition -
face->postscript.underlineThickness / 2;
root->underline_thickness = face->postscript.underlineThickness;
}
}
