static TT_Error
Subtable_Load_0( TT_Kern_0* kern0,
PFace input )
{
DEFINE_LOAD_LOCALS( input->stream );
UShort num_pairs, n;
if ( ACCESS_Frame( 8L ) )
return error;
num_pairs = GET_UShort();
kern0->nPairs = 0;
kern0->searchRange = GET_UShort();
kern0->entrySelector = GET_UShort();
kern0->rangeShift = GET_UShort();
/* we only set kern0->nPairs if the subtable has been loaded */
FORGET_Frame();
if ( ALLOC_ARRAY( kern0->pairs, num_pairs, TT_Kern_0_Pair ) )
return error;
if ( ACCESS_Frame( num_pairs * 6L ) )
goto Fail;
for ( n = 0; n < num_pairs; n++ )
{
kern0->pairs[n].left = GET_UShort();
kern0->pairs[n].right = GET_UShort();
kern0->pairs[n].value = GET_UShort();
if ( kern0->pairs[n].left >= input->numGlyphs ||
kern0->pairs[n].right >= input->numGlyphs )
{
FORGET_Frame();
error = TT_Err_Invalid_Kerning_Table;
goto Fail;
}
}
FORGET_Frame();
/* we're ok, set the pairs count */
kern0->nPairs = num_pairs;
/* the spec says that the kerning pairs must be sorted,
but some brain damaged font producers don't do that correctly.. (JvR 3/4/2000) */
if ( !is_sorted( kern0->pairs, num_pairs ) )
sort_kern_pairs( kern0->pairs, num_pairs );
return TT_Err_Ok;
Fail:
FREE( kern0->pairs );
return error;
}
static TT_Error Subtable_Load_0( TT_Kern_0* kern0,
PFace input )
{
DEFINE_LOAD_LOCALS( input->stream );
UShort num_pairs, n;
if ( ACCESS_Frame( 8L ) )
return error;
num_pairs = GET_UShort();
kern0->nPairs = 0;
kern0->searchRange = GET_UShort();
kern0->entrySelector = GET_UShort();
kern0->rangeShift = GET_UShort();
/* we only set kern0->nPairs if the subtable has been loaded */
FORGET_Frame();
if ( ALLOC_ARRAY( kern0->pairs, num_pairs, TT_Kern_0_Pair ) )
return error;
if ( ACCESS_Frame( num_pairs * 6L ) )
goto Fail;
for ( n = 0; n < num_pairs; n++ )
{
kern0->pairs[n].left = GET_UShort();
kern0->pairs[n].right = GET_UShort();
kern0->pairs[n].value = GET_UShort();
if ( kern0->pairs[n].left >= input->numGlyphs ||
kern0->pairs[n].right >= input->numGlyphs )
{
FORGET_Frame();
error = TT_Err_Invalid_Kerning_Table;
goto Fail;
}
}
FORGET_Frame();
/* we're ok, set the pairs count */
kern0->nPairs = num_pairs;
return TT_Err_Ok;
Fail:
FREE( kern0->pairs );
return error;
}
static FT_Error Load_LigGlyph( HB_LigGlyph* lg,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_UShort n, m, count;
FT_ULong cur_offset, new_offset, base_offset;
HB_CaretValue* cv;
base_offset = FILE_Pos();
if ( ACCESS_Frame( 2L ) )
return error;
count = lg->CaretCount = GET_UShort();
FORGET_Frame();
lg->CaretValue = NULL;
if ( ALLOC_ARRAY( lg->CaretValue, count, HB_CaretValue ) )
return error;
cv = lg->CaretValue;
for ( n = 0; n < count; n++ )
{
if ( ACCESS_Frame( 2L ) )
goto Fail;
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = Load_CaretValue( &cv[n], stream ) ) != FT_Err_Ok )
goto Fail;
(void)FILE_Seek( cur_offset );
}
return FT_Err_Ok;
Fail:
for ( m = 0; m < n; m++ )
Free_CaretValue( &cv[m], memory );
FREE( cv );
return error;
}
static FT_Error Load_AttachPoint( HB_AttachPoint* ap,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_UShort n, count;
FT_UShort* pi;
if ( ACCESS_Frame( 2L ) )
return error;
count = ap->PointCount = GET_UShort();
FORGET_Frame();
ap->PointIndex = NULL;
if ( count )
{
if ( ALLOC_ARRAY( ap->PointIndex, count, FT_UShort ) )
return error;
pi = ap->PointIndex;
if ( ACCESS_Frame( count * 2L ) )
{
FREE( pi );
return error;
}
for ( n = 0; n < count; n++ )
pi[n] = GET_UShort();
FORGET_Frame();
}
return FT_Err_Ok;
}
FT_LOCAL_DEF
FT_Error TT_Load_Locations( TT_Face face,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory = stream->memory;
FT_Short LongOffsets;
FT_ULong table_len;
FT_TRACE2(( "Locations " ));
LongOffsets = face->header.Index_To_Loc_Format;
error = face->goto_table( face, TTAG_loca, stream, &table_len );
if ( error )
{
error = TT_Err_Locations_Missing;
goto Exit;
}
if ( LongOffsets != 0 )
{
face->num_locations = (FT_UShort)( table_len >> 2 );
FT_TRACE2(( "(32bit offsets): %12d ", face->num_locations ));
if ( ALLOC_ARRAY( face->glyph_locations,
face->num_locations,
FT_Long ) )
goto Exit;
if ( ACCESS_Frame( face->num_locations * 4L ) )
goto Exit;
{
FT_Long* loc = face->glyph_locations;
FT_Long* limit = loc + face->num_locations;
for ( ; loc < limit; loc++ )
*loc = GET_Long();
}
FORGET_Frame();
}
static FT_Error GDEF_Create( void* ext,
PFace face )
{
DEFINE_LOAD_LOCALS( face->stream );
HB_GDEFHeader* gdef = (HB_GDEFHeader*)ext;
Long table;
/* by convention */
if ( !gdef )
return FT_Err_Ok;
/* a null offset indicates that there is no GDEF table */
gdef->offset = 0;
/* we store the start offset and the size of the subtable */
table = HB_LookUp_Table( face, TTAG_GDEF );
if ( table < 0 )
return FT_Err_Ok; /* The table is optional */
if ( FILE_Seek( face->dirTables[table].Offset ) ||
ACCESS_Frame( 4L ) )
return error;
gdef->offset = FILE_Pos() - 4L; /* undo ACCESS_Frame() */
gdef->Version = GET_ULong();
FORGET_Frame();
gdef->loaded = FALSE;
return FT_Err_Ok;
}
/* parse an AFM file -- for now, only read the kerning pairs */
FT_LOCAL_DEF
FT_Error CID_Read_AFM( FT_Face cid_face,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory = stream->memory;
FT_Byte* start;
FT_Byte* limit;
FT_Byte* p;
FT_Int count = 0;
CID_Kern_Pair* pair;
T1_Font* type1 = &((T1_Face)t1_face)->type1;
CID_AFM* afm = 0;
if ( ACCESS_Frame( stream->size ) )
return error;
start = (FT_Byte*)stream->cursor;
limit = (FT_Byte*)stream->limit;
p = start;
/* we are now going to count the occurrences of `KP' or `KPX' in */
/* the AFM file. */
count = 0;
for ( p = start; p < limit - 3; p++ )
{
if ( IS_KERN_PAIR( p ) )
count++;
}
/* Actually, kerning pairs are simply optional! */
if ( count == 0 )
goto Exit;
/* allocate the pairs */
if ( ALLOC( afm, sizeof ( *afm ) ) ||
ALLOC_ARRAY( afm->kern_pairs, count, CID_Kern_Pair ) )
goto Exit;
/* now, read each kern pair */
pair = afm->kern_pairs;
afm->num_pairs = count;
/* save in face object */
((T1_Face)t1_face)->afm_data = afm;
for ( p = start; p < limit - 3; p++ )
{
if ( IS_KERN_PAIR( p ) )
{
FT_Byte* q;
/* skip keyword (`KP' or `KPX') */
q = p + 2;
if ( *q == 'X' )
q++;
pair->glyph1 = afm_atoindex( &q, limit, type1 );
pair->glyph2 = afm_atoindex( &q, limit, type1 );
pair->kerning.x = afm_atoi( &q, limit );
pair->kerning.y = 0;
if ( p[2] != 'X' )
pair->kerning.y = afm_atoi( &q, limit );
pair++;
}
}
/* now, sort the kern pairs according to their glyph indices */
qsort( afm->kern_pairs, count, sizeof ( CID_Kern_Pair ),
compare_kern_pairs );
Exit:
if ( error )
FREE( afm );
FORGET_Frame();
return error;
}
static FT_Error Load_CaretValue( HB_CaretValue* cv,
FT_Stream stream )
{
FT_Error error;
FT_ULong cur_offset, new_offset, base_offset;
base_offset = FILE_Pos();
if ( ACCESS_Frame( 2L ) )
return error;
cv->CaretValueFormat = GET_UShort();
FORGET_Frame();
switch ( cv->CaretValueFormat )
{
case 1:
if ( ACCESS_Frame( 2L ) )
return error;
cv->cvf.cvf1.Coordinate = GET_Short();
FORGET_Frame();
break;
case 2:
if ( ACCESS_Frame( 2L ) )
return error;
cv->cvf.cvf2.CaretValuePoint = GET_UShort();
FORGET_Frame();
break;
case 3:
if ( ACCESS_Frame( 4L ) )
return error;
cv->cvf.cvf3.Coordinate = GET_Short();
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = _HB_OPEN_Load_Device( &cv->cvf.cvf3.Device,
stream ) ) != FT_Err_Ok )
return error;
(void)FILE_Seek( cur_offset );
break;
case 4:
if ( ACCESS_Frame( 2L ) )
return error;
cv->cvf.cvf4.IdCaretValue = GET_UShort();
FORGET_Frame();
break;
default:
return HB_Err_Invalid_GDEF_SubTable_Format;
}
return FT_Err_Ok;
}
static FT_Error Load_AttachList( HB_AttachList* al,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_UShort n, m, count;
FT_ULong cur_offset, new_offset, base_offset;
HB_AttachPoint* ap;
base_offset = FILE_Pos();
if ( ACCESS_Frame( 2L ) )
return error;
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = _HB_OPEN_Load_Coverage( &al->Coverage, stream ) ) != FT_Err_Ok )
return error;
(void)FILE_Seek( cur_offset );
if ( ACCESS_Frame( 2L ) )
goto Fail2;
count = al->GlyphCount = GET_UShort();
FORGET_Frame();
al->AttachPoint = NULL;
if ( ALLOC_ARRAY( al->AttachPoint, count, HB_AttachPoint ) )
goto Fail2;
ap = al->AttachPoint;
for ( n = 0; n < count; n++ )
{
if ( ACCESS_Frame( 2L ) )
goto Fail1;
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = Load_AttachPoint( &ap[n], stream ) ) != FT_Err_Ok )
goto Fail1;
(void)FILE_Seek( cur_offset );
}
al->loaded = TRUE;
return FT_Err_Ok;
Fail1:
for ( m = 0; m < n; m++ )
Free_AttachPoint( &ap[m], memory );
FREE( ap );
Fail2:
_HB_OPEN_Free_Coverage( &al->Coverage, memory );
return error;
}
FT_Error HB_Load_GDEF_Table( FT_Face face,
HB_GDEFHeader** retptr )
{
FT_Error error;
FT_Memory memory = face->memory;
FT_Stream stream = face->stream;
FT_ULong cur_offset, new_offset, base_offset;
HB_GDEFHeader* gdef;
if ( !retptr )
return FT_Err_Invalid_Argument;
if (( error = _hb_ftglue_face_goto_table( face, TTAG_GDEF, stream ) ))
return error;
if (( error = HB_New_GDEF_Table ( face, &gdef ) ))
return error;
base_offset = FILE_Pos();
/* skip version */
if ( FILE_Seek( base_offset + 4L ) ||
ACCESS_Frame( 2L ) )
goto Fail0;
new_offset = GET_UShort();
FORGET_Frame();
/* all GDEF subtables are optional */
if ( new_offset )
{
new_offset += base_offset;
/* only classes 1-4 are allowed here */
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = _HB_OPEN_Load_ClassDefinition( &gdef->GlyphClassDef, 5,
stream ) ) != FT_Err_Ok )
goto Fail0;
(void)FILE_Seek( cur_offset );
}
if ( ACCESS_Frame( 2L ) )
goto Fail1;
new_offset = GET_UShort();
FORGET_Frame();
if ( new_offset )
{
new_offset += base_offset;
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = Load_AttachList( &gdef->AttachList,
stream ) ) != FT_Err_Ok )
goto Fail1;
(void)FILE_Seek( cur_offset );
}
if ( ACCESS_Frame( 2L ) )
goto Fail2;
new_offset = GET_UShort();
FORGET_Frame();
if ( new_offset )
{
new_offset += base_offset;
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = Load_LigCaretList( &gdef->LigCaretList,
stream ) ) != FT_Err_Ok )
goto Fail2;
(void)FILE_Seek( cur_offset );
}
/* OpenType 1.2 has introduced the `MarkAttachClassDef' field. We
first have to scan the LookupFlag values to find out whether we
must load it or not. Here we only store the offset of the table. */
if ( ACCESS_Frame( 2L ) )
goto Fail3;
new_offset = GET_UShort();
FORGET_Frame();
if ( new_offset )
gdef->MarkAttachClassDef_offset = new_offset + base_offset;
else
gdef->MarkAttachClassDef_offset = 0;
*retptr = gdef;
return FT_Err_Ok;
Fail3:
Free_LigCaretList( &gdef->LigCaretList, memory );
Fail2:
Free_AttachList( &gdef->AttachList, memory );
Fail1:
_HB_OPEN_Free_ClassDefinition( &gdef->GlyphClassDef, memory );
Fail0:
FREE( gdef );
return error;
}
static
TT_Error Load_Composite_End( UShort n_points,
Short n_contours,
PExecution_Context exec,
PSubglyph_Record subg,
UShort load_flags,
TT_Stream input )
{
DEFINE_LOAD_LOCALS( input );
UShort k, n_ins;
PGlyph_Zone pts;
if ( subg->is_hinted &&
subg->element_flag & WE_HAVE_INSTR )
{
if ( ACCESS_Frame( 2L ) )
return error;
n_ins = GET_UShort(); /* read size of instructions */
FORGET_Frame();
PTRACE4(( " Instructions size: %d\n", n_ins ));
if ( n_ins > exec->face->maxProfile.maxSizeOfInstructions )
{
PTRACE0(( "ERROR: Too many instructions in composite glyph %ld\n",
subg->index ));
return TT_Err_Too_Many_Ins;
}
if ( FILE_Read( exec->glyphIns, n_ins ) )
return error;
error = Set_CodeRange( exec,
TT_CodeRange_Glyph,
exec->glyphIns,
n_ins );
if ( error )
return error;
}
else
n_ins = 0;
/* prepare the execution context */
n_points += 2;
exec->pts = subg->zone;
pts = &exec->pts;
pts->n_points = n_points;
pts->n_contours = n_contours;
/* add phantom points */
pts->cur[n_points - 2] = subg->pp1;
pts->cur[n_points - 1] = subg->pp2;
pts->touch[n_points - 1] = 0;
pts->touch[n_points - 2] = 0;
/* if hinting, round the phantom points */
if ( subg->is_hinted )
{
pts->cur[n_points - 2].x = (subg->pp1.x + 32) & -64;
pts->cur[n_points - 1].x = (subg->pp2.x + 32) & -64;
}
for ( k = 0; k < n_points; k++ )
pts->touch[k] &= TT_Flag_On_Curve;
cur_to_org( n_points, pts );
/* now consider hinting */
if ( subg->is_hinted && n_ins > 0 )
{
exec->is_composite = TRUE;
exec->pedantic_hinting = load_flags & TTLOAD_PEDANTIC;
error = Context_Run( exec, FALSE );
if (error && exec->pedantic_hinting)
return error;
}
/* save glyph origin and advance points */
subg->pp1 = pts->cur[n_points - 2];
subg->pp2 = pts->cur[n_points - 1];
return TT_Err_Ok;
}
cid_load_glyph( T1_Decoder* decoder,
FT_UInt glyph_index )
{
CID_Face face = (CID_Face)decoder->builder.face;
CID_Info* cid = &face->cid;
FT_Byte* p;
FT_UInt entry_len = cid->fd_bytes + cid->gd_bytes;
FT_UInt fd_select;
FT_ULong off1, glyph_len;
FT_Stream stream = face->root.stream;
FT_Error error = 0;
/* read the CID font dict index and charstring offset from the CIDMap */
if ( FILE_Seek( cid->data_offset + cid->cidmap_offset +
glyph_index * entry_len ) ||
ACCESS_Frame( 2 * entry_len ) )
goto Exit;
p = (FT_Byte*)stream->cursor;
fd_select = (FT_UInt) cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
off1 = (FT_ULong)cid_get_offset( &p, (FT_Byte)cid->gd_bytes );
p += cid->fd_bytes;
glyph_len = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1;
FORGET_Frame();
/* now, if the glyph is not empty, set up the subrs array, and parse */
/* the charstrings */
if ( glyph_len > 0 )
{
CID_FontDict* dict;
CID_Subrs* cid_subrs = face->subrs + fd_select;
FT_Byte* charstring;
FT_Memory memory = face->root.memory;
/* setup subrs */
decoder->num_subrs = cid_subrs->num_subrs;
decoder->subrs = cid_subrs->code;
decoder->subrs_len = 0;
/* setup font matrix */
dict = cid->font_dicts + fd_select;
decoder->font_matrix = dict->font_matrix;
decoder->font_offset = dict->font_offset;
decoder->lenIV = dict->private_dict.lenIV;
/* the charstrings are encoded (stupid!) */
/* load the charstrings, then execute it */
if ( ALLOC( charstring, glyph_len ) )
goto Exit;
if ( !FILE_Read_At( cid->data_offset + off1, charstring, glyph_len ) )
{
FT_Int cs_offset;
/* Adjustment for seed bytes. */
cs_offset = ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
/* Decrypt only if lenIV >= 0. */
if ( decoder->lenIV >= 0 )
cid_decrypt( charstring, glyph_len, 4330 );
error = decoder->funcs.parse_charstrings( decoder,
charstring + cs_offset,
glyph_len - cs_offset );
}
FREE( charstring );
}
Exit:
return error;
}
static FT_Error
fnt_face_get_dll_fonts( FNT_Face face )
{
FT_Error error;
FT_Stream stream = FT_FACE(face)->stream;
FT_Memory memory = FT_FACE(face)->memory;
WinMZ_Header mz_header;
face->fonts = 0;
face->num_fonts = 0;
/* does it begin with a MZ header? */
if ( FILE_Seek( 0 ) ||
READ_Fields( winmz_header_fields, &mz_header ) )
goto Exit;
error = FNT_Err_Unknown_File_Format;
if ( mz_header.magic == WINFNT_MZ_MAGIC )
{
/* yes, now look for a NE header in the file */
WinNE_Header ne_header;
if ( FILE_Seek( mz_header.lfanew ) ||
READ_Fields( winne_header_fields, &ne_header ) )
goto Exit;
error = FNT_Err_Unknown_File_Format;
if ( ne_header.magic == WINFNT_NE_MAGIC )
{
/* good, now look in the resource table for each FNT resource */
FT_ULong res_offset = mz_header.lfanew +
ne_header.resource_tab_offset;
FT_UShort size_shift;
FT_UShort font_count = 0;
FT_ULong font_offset = 0;
if ( FILE_Seek( res_offset ) ||
ACCESS_Frame( ne_header.rname_tab_offset -
ne_header.resource_tab_offset ) )
goto Exit;
size_shift = GET_UShortLE();
for (;;)
{
FT_UShort type_id, count;
type_id = GET_UShortLE();
if ( !type_id )
break;
count = GET_UShortLE();
if ( type_id == 0x8008 )
{
font_count = count;
font_offset = (FT_ULong)( FILE_Pos() + 4 +
( stream->cursor - stream->limit ) );
break;
}
stream->cursor += 4 + count * 12;
}
FORGET_Frame();
if ( !font_count || !font_offset )
{
FT_TRACE2(( "this file doesn't contain any FNT resources!\n" ));
error = FNT_Err_Unknown_File_Format;
goto Exit;
}
if ( FILE_Seek( font_offset ) ||
ALLOC_ARRAY( face->fonts, font_count, FNT_Font ) )
goto Exit;
face->num_fonts = font_count;
if ( ACCESS_Frame( (FT_Long)font_count * 12 ) )
goto Exit;
/* now read the offset and position of each FNT font */
{
FNT_Font* cur = face->fonts;
FNT_Font* limit = cur + font_count;
for ( ; cur < limit; cur++ )
{
cur->offset = (FT_ULong)GET_UShortLE() << size_shift;
cur->fnt_size = (FT_ULong)GET_UShortLE() << size_shift;
cur->size_shift = size_shift;
stream->cursor += 8;
}
}
FORGET_Frame();
/* finally, try to load each font there */
{
FNT_Font* cur = face->fonts;
FNT_Font* limit = cur + font_count;
for ( ; cur < limit; cur++ )
{
error = fnt_font_load( cur, stream );
if ( error )
goto Fail;
}
}
}
}
Fail:
if ( error )
fnt_face_done_fonts( face );
Exit:
return error;
}
static FT_Error Load_LigCaretList( HB_LigCaretList* lcl,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_UShort m, n, count;
FT_ULong cur_offset, new_offset, base_offset;
HB_LigGlyph* lg;
base_offset = FILE_Pos();
if ( ACCESS_Frame( 2L ) )
return error;
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = _HB_OPEN_Load_Coverage( &lcl->Coverage, stream ) ) != FT_Err_Ok )
return error;
(void)FILE_Seek( cur_offset );
if ( ACCESS_Frame( 2L ) )
goto Fail2;
count = lcl->LigGlyphCount = GET_UShort();
FORGET_Frame();
lcl->LigGlyph = NULL;
if ( ALLOC_ARRAY( lcl->LigGlyph, count, HB_LigGlyph ) )
goto Fail2;
lg = lcl->LigGlyph;
for ( n = 0; n < count; n++ )
{
if ( ACCESS_Frame( 2L ) )
goto Fail1;
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = Load_LigGlyph( &lg[n], stream ) ) != FT_Err_Ok )
goto Fail1;
(void)FILE_Seek( cur_offset );
}
lcl->loaded = TRUE;
return FT_Err_Ok;
Fail1:
for ( m = 0; m < n; m++ )
Free_LigGlyph( &lg[m], memory );
FREE( lg );
Fail2:
_HB_OPEN_Free_Coverage( &lcl->Coverage, memory );
return error;
}
static TT_Error Load_Simple_Glyph( PExecution_Context exec,
TT_Stream input,
Short n_contours,
Short left_contours,
UShort left_points,
UShort load_flags,
PSubglyph_Record subg )
{
DEFINE_LOAD_LOCALS( input );
PGlyph_Zone pts;
Short k;
UShort j;
UShort n_points, n_ins;
PFace face;
Byte* flag;
TT_Vector* vec;
TT_F26Dot6 x, y;
face = exec->face;
/* simple check */
if ( n_contours > left_contours )
{
PTRACE0(( "ERROR: Glyph index %ld has %d contours > left %d\n",
subg->index, n_contours, left_contours ));
return TT_Err_Too_Many_Contours;
}
/* preparing the execution context */
mount_zone( &subg->zone, &exec->pts );
/* reading the contours endpoints */
if ( ACCESS_Frame( (n_contours + 1) * 2L ) )
return error;
PTRACE4(( " Contour endpoints:" ));
for ( k = 0; k < n_contours; k++ )
{
exec->pts.contours[k] = GET_UShort();
PTRACE4(( " %d", exec->pts.contours[k] ));
}
PTRACE4(( "\n" ));
if ( n_contours > 0 )
n_points = exec->pts.contours[n_contours - 1] + 1;
else
n_points = 0;
n_ins = GET_UShort();
FORGET_Frame();
if ( n_points > left_points )
{
PTRACE0(( "ERROR: Too many points in glyph %ld\n", subg->index ));
return TT_Err_Too_Many_Points;
}
/* loading instructions */
PTRACE4(( " Instructions size: %d\n", n_ins ));
if ( n_ins > face->maxProfile.maxSizeOfInstructions )
{
PTRACE0(( "ERROR: Too many instructions!\n" ));
return TT_Err_Too_Many_Ins;
}
if ( FILE_Read( exec->glyphIns, n_ins ) )
return error;
if ( (error = Set_CodeRange( exec,
TT_CodeRange_Glyph,
exec->glyphIns,
n_ins )) != TT_Err_Ok )
return error;
/* read the flags */
if ( CHECK_AND_ACCESS_Frame( n_points * 5L ) )
return error;
j = 0;
flag = exec->pts.touch;
while ( j < n_points )
{
Byte c, cnt;
flag[j] = c = GET_Byte();
j++;
if ( c & 8 )
{
cnt = GET_Byte();
while( cnt > 0 )
{
flag[j++] = c;
cnt--;
}
}
}
/* read the X */
x = 0;
vec = exec->pts.org;
for ( j = 0; j < n_points; j++ )
{
if ( flag[j] & 2 )
{
if ( flag[j] & 16 )
x += GET_Byte();
else
x -= GET_Byte();
}
else
{
if ( (flag[j] & 16) == 0 )
x += GET_Short();
}
vec[j].x = x;
}
/* read the Y */
y = 0;
for ( j = 0; j < n_points; j++ )
{
if ( flag[j] & 4 )
{
if ( flag[j] & 32 )
y += GET_Byte();
else
y -= GET_Byte();
}
else
{
if ( (flag[j] & 32) == 0 )
y += GET_Short();
}
vec[j].y = y;
}
FORGET_Frame();
/* Now add the two shadow points at n and n + 1. */
/* We need the left side bearing and advance width. */
/* pp1 = xMin - lsb */
vec[n_points].x = subg->metrics.bbox.xMin - subg->metrics.horiBearingX;
vec[n_points].y = 0;
/* pp2 = pp1 + aw */
vec[n_points+1].x = vec[n_points].x + subg->metrics.horiAdvance;
vec[n_points+1].y = 0;
/* clear the touch flags */
for ( j = 0; j < n_points; j++ )
exec->pts.touch[j] &= TT_Flag_On_Curve;
exec->pts.touch[n_points ] = 0;
exec->pts.touch[n_points + 1] = 0;
/* Note that we return two more points that are not */
/* part of the glyph outline. */
n_points += 2;
/* now eventually scale and hint the glyph */
pts = &exec->pts;
pts->n_points = n_points;
pts->n_contours = n_contours;
if ( (load_flags & TTLOAD_SCALE_GLYPH) == 0 )
{
/* no scaling, just copy the orig arrays into the cur ones */
org_to_cur( n_points, pts );
}
else
{
/* first scale the glyph points */
for ( j = 0; j < n_points; j++ )
{
pts->org[j].x = Scale_X( &exec->metrics, pts->org[j].x );
pts->org[j].y = Scale_Y( &exec->metrics, pts->org[j].y );
}
/* if hinting, round pp1, and shift the glyph accordingly */
if ( subg->is_hinted )
{
x = pts->org[n_points - 2].x;
x = ((x+32) & -64) - x;
translate_array( n_points, pts->org, x, 0 );
org_to_cur( n_points, pts );
pts->cur[n_points - 1].x = (pts->cur[n_points - 1].x + 32) & -64;
/* now consider hinting */
if ( n_ins > 0 )
{
exec->is_composite = FALSE;
exec->pedantic_hinting = load_flags & TTLOAD_PEDANTIC;
error = Context_Run( exec, FALSE );
if (error && exec->pedantic_hinting)
return error;
}
}
else
org_to_cur( n_points, pts );
}
/* save glyph phantom points */
if (!subg->preserve_pps)
{
subg->pp1 = pts->cur[n_points - 2];
subg->pp2 = pts->cur[n_points - 1];
}
return TT_Err_Ok;
}
static TT_Error
Kerning_Create( void* ext,
PFace face )
{
DEFINE_LOAD_LOCALS( face->stream );
TT_Kerning* kern = (TT_Kerning*)ext;
UShort num_tables;
Long table;
TT_Kern_Subtable* sub;
/* by convention */
if ( !kern )
return TT_Err_Ok;
/* Now load the kerning directory. We're called from the face */
/* constructor. We thus need not use the stream. */
kern->version = 0;
kern->nTables = 0;
kern->tables = NULL;
table = TT_LookUp_Table( face, TTAG_kern );
if ( table < 0 )
return TT_Err_Ok; /* The table is optional */
if ( FILE_Seek( face->dirTables[table].Offset ) ||
ACCESS_Frame( 4L ) )
return error;
kern->version = GET_UShort();
num_tables = GET_UShort();
FORGET_Frame();
/* we don't set kern->nTables until we have allocated the array */
if ( ALLOC_ARRAY( kern->tables, num_tables, TT_Kern_Subtable ) )
return error;
kern->nTables = num_tables;
/* now load the directory entries, but do _not_ load the tables ! */
sub = kern->tables;
for ( table = 0; table < num_tables; table++ )
{
if ( ACCESS_Frame( 6L ) )
return error;
sub->loaded = FALSE; /* redundant, but good to see */
sub->version = GET_UShort();
sub->length = GET_UShort() - 6; /* substract header length */
sub->format = GET_Byte();
sub->coverage = GET_Byte();
FORGET_Frame();
sub->offset = FILE_Pos();
/* now skip to the next table */
if ( FILE_Skip( sub->length ) )
return error;
sub++;
}
/* that's fine, leave now */
return TT_Err_Ok;
}
static TT_Error
Subtable_Load_2( TT_Kern_2* kern2,
PFace input )
{
DEFINE_LOAD_LOCALS( input->stream );
Long table_base;
UShort left_offset, right_offset, array_offset;
ULong array_size;
UShort left_max, right_max, n;
/* record the table offset */
table_base = FILE_Pos();
if ( ACCESS_Frame( 8L ) )
return error;
kern2->rowWidth = GET_UShort();
left_offset = GET_UShort();
right_offset = GET_UShort();
array_offset = GET_UShort();
FORGET_Frame();
/* first load left and right glyph classes */
if ( FILE_Seek( table_base + left_offset ) ||
ACCESS_Frame( 4L ) )
return error;
kern2->leftClass.firstGlyph = GET_UShort();
kern2->leftClass.nGlyphs = GET_UShort();
FORGET_Frame();
if ( ALLOC_ARRAY( kern2->leftClass.classes,
kern2->leftClass.nGlyphs,
UShort ) )
return error;
/* load left offsets */
if ( ACCESS_Frame( kern2->leftClass.nGlyphs * 2L ) )
goto Fail_Left;
for ( n = 0; n < kern2->leftClass.nGlyphs; n++ )
kern2->leftClass.classes[n] = GET_UShort();
FORGET_Frame();
/* right class */
if ( FILE_Seek( table_base + right_offset ) ||
ACCESS_Frame( 4L ) )
goto Fail_Left;
kern2->rightClass.firstGlyph = GET_UShort();
kern2->rightClass.nGlyphs = GET_UShort();
FORGET_Frame();
if ( ALLOC_ARRAY( kern2->rightClass.classes,
kern2->rightClass.nGlyphs,
UShort ) )
goto Fail_Left;
/* load right offsets */
if ( ACCESS_Frame( kern2->rightClass.nGlyphs * 2L ) )
goto Fail_Right;
for ( n = 0; n < kern2->rightClass.nGlyphs; n++ )
kern2->rightClass.classes[n] = GET_UShort();
FORGET_Frame();
/* Now load the kerning array. We don't have its size, we */
/* must compute it from what we know. */
/* We thus compute the maximum left and right offsets and */
/* add them to get the array size. */
left_max = right_max = 0;
for ( n = 0; n < kern2->leftClass.nGlyphs; n++ )
left_max = MAX( left_max, kern2->leftClass.classes[n] );
for ( n = 0; n < kern2->rightClass.nGlyphs; n++ )
right_max = MAX( right_max, kern2->leftClass.classes[n] );
array_size = left_max + right_max + 2;
if ( ALLOC( kern2->array, array_size ) )
goto Fail_Right;
if ( ACCESS_Frame( array_size ) )
goto Fail_Array;
for ( n = 0; (UInt)n < array_size/2; n++ )
kern2->array[n] = GET_Short();
FORGET_Frame();
/* we're good now */
return TT_Err_Ok;
Fail_Array:
FREE( kern2->array );
Fail_Right:
FREE( kern2->rightClass.classes );
kern2->rightClass.nGlyphs = 0;
Fail_Left:
FREE( kern2->leftClass.classes );
kern2->leftClass.nGlyphs = 0;
return error;
}
Load_TrueType_Glyph( PInstance instance,
PGlyph glyph,
UShort glyph_index,
UShort load_flags )
{
enum TPhases_
{
Load_Exit,
Load_Glyph,
Load_Header,
Load_Simple,
Load_Composite,
Load_End
};
typedef enum TPhases_ TPhases;
DEFINE_ALL_LOCALS;
PFace face;
UShort num_points;
Short num_contours;
UShort left_points;
Short left_contours;
UShort num_elem_points;
Long table;
UShort load_top;
Long k, l;
UShort new_flags;
Long index;
UShort u, v;
Long glyph_offset, offset;
TT_F26Dot6 x, y, nx, ny;
Fixed xx, xy, yx, yy;
PExecution_Context exec;
PSubglyph_Record subglyph, subglyph2;
TGlyph_Zone base_pts;
TPhases phase;
PByte widths;
/* TT_Glyph_Loader_Callback cacheCb; */
/* TT_Outline cached_outline; */
/* first of all, check arguments */
if ( !glyph )
return TT_Err_Invalid_Glyph_Handle;
face = glyph->face;
if ( !face )
return TT_Err_Invalid_Glyph_Handle;
if ( glyph_index >= face->numGlyphs )
return TT_Err_Invalid_Glyph_Index;
if ( instance && (load_flags & TTLOAD_SCALE_GLYPH) == 0 )
{
instance = 0;
load_flags &= ~( TTLOAD_SCALE_GLYPH | TTLOAD_HINT_GLYPH );
}
table = TT_LookUp_Table( face, TTAG_glyf );
if ( table < 0 )
{
PTRACE0(( "ERROR: There is no glyph table in this font file!\n" ));
return TT_Err_Glyf_Table_Missing;
}
glyph_offset = face->dirTables[table].Offset;
/* query new execution context */
if ( instance && instance->debug )
exec = instance->context;
else
exec = New_Context( face );
if ( !exec )
return TT_Err_Could_Not_Find_Context;
Context_Load( exec, face, instance );
if ( instance )
{
if ( instance->GS.instruct_control & 2 )
exec->GS = Default_GraphicsState;
else
exec->GS = instance->GS;
/* load default graphics state */
glyph->outline.high_precision = ( instance->metrics.y_ppem < 24 );
}
/* save its critical pointers, as they'll be modified during load */
base_pts = exec->pts;
/* init variables */
left_points = face->maxPoints;
left_contours = face->maxContours;
num_points = 0;
num_contours = 0;
load_top = 0;
subglyph = exec->loadStack;
Init_Glyph_Component( subglyph, NULL, exec );
subglyph->index = glyph_index;
subglyph->is_hinted = load_flags & TTLOAD_HINT_GLYPH;
/* when the cvt program has disabled hinting, the argument */
/* is ignored. */
if ( instance && instance->GS.instruct_control & 1 )
subglyph->is_hinted = FALSE;
/* now access stream */
if ( USE_Stream( face->stream, stream ) )
goto Fin;
/* Main loading loop */
phase = Load_Glyph;
index = 0;
while ( phase != Load_Exit )
{
subglyph = exec->loadStack + load_top;
switch ( phase )
{
/************************************************************/
/* */
/* Load_Glyph state */
/* */
/* reading a glyph's generic header to determine */
/* whether it's simple or composite */
/* */
/* exit states: Load_Header and Load_End */
case Load_Glyph:
/* check glyph index and table */
index = subglyph->index;
if ( index < 0 || index >= face->numGlyphs )
{
error = TT_Err_Invalid_Glyph_Index;
goto Fail;
}
/* get horizontal metrics */
{
Short left_bearing;
UShort advance_width;
Get_HMetrics( face, (UShort)index,
!(load_flags & TTLOAD_IGNORE_GLOBAL_ADVANCE_WIDTH),
&left_bearing,
&advance_width );
subglyph->metrics.horiBearingX = left_bearing;
subglyph->metrics.horiAdvance = advance_width;
}
phase = Load_Header;
/* The cache callback isn't part of the FreeType release yet */
/* It is discarded for the moment.. */
/* */
#if 0
if ( instance )
{
/* is the glyph in an outline cache ? */
cacheCb = instance->owner->engine->glCallback;
if ( cacheCb && 0 ) /* disabled */
{
/* we have a callback */
error = cacheCb( instance->generic,
index, &cached_outline, &x, &y );
if ( !error )
{
/* no error, then append the outline to the current subglyph */
/* error = Append_Outline( subglyph,
&left_points,
&left_contours,
&cached_outline ); */
phase = Load_End;
}
}
}
#endif
break;
/************************************************************/
/* */
/* Load_Header state */
/* */
/* reading a glyph's generic header to determine */
/* wether it's simple or composite */
/* */
/* exit states: Load_Simple and Load_Composite */
/* */
case Load_Header: /* load glyph */
if ( (TT_UInt)( index + 1 ) < (TT_UInt)face->numLocations &&
face->glyphLocations[index] == face->glyphLocations[index + 1] )
{
/* as described by Frederic Loyer, these are spaces, and */
/* not the unknown glyph. */
num_contours = 0;
num_points = 0;
subglyph->metrics.bbox.xMin = 0;
subglyph->metrics.bbox.xMax = 0;
subglyph->metrics.bbox.yMin = 0;
subglyph->metrics.bbox.yMax = 0;
subglyph->pp1.x = 0;
subglyph->pp2.x = subglyph->metrics.horiAdvance;
if (load_flags & TTLOAD_SCALE_GLYPH)
subglyph->pp2.x = Scale_X( &exec->metrics, subglyph->pp2.x );
exec->glyphSize = 0;
phase = Load_End;
break;
}
offset = glyph_offset + face->glyphLocations[index];
/* read first glyph header */
if ( FILE_Seek( offset ) ||
ACCESS_Frame( 10L ) )
goto Fail_File;
num_contours = GET_Short();
subglyph->metrics.bbox.xMin = GET_Short();
subglyph->metrics.bbox.yMin = GET_Short();
subglyph->metrics.bbox.xMax = GET_Short();
subglyph->metrics.bbox.yMax = GET_Short();
FORGET_Frame();
PTRACE6(( "Glyph %ld:\n", index ));
PTRACE6(( " # of contours: %d\n", num_contours ));
PTRACE6(( " xMin: %4d xMax: %4d\n",
subglyph->metrics.bbox.xMin,
subglyph->metrics.bbox.xMax ));
PTRACE6(( " yMin: %4d yMax: %4d\n",
subglyph->metrics.bbox.yMin,
subglyph->metrics.bbox.yMax ));
if ( num_contours > left_contours )
{
PTRACE0(( "ERROR: Too many contours for glyph %ld\n", index ));
error = TT_Err_Too_Many_Contours;
goto Fail;
}
subglyph->pp1.x = subglyph->metrics.bbox.xMin -
subglyph->metrics.horiBearingX;
subglyph->pp1.y = 0;
subglyph->pp2.x = subglyph->pp1.x + subglyph->metrics.horiAdvance;
if (load_flags & TTLOAD_SCALE_GLYPH)
{
subglyph->pp1.x = Scale_X( &exec->metrics, subglyph->pp1.x );
subglyph->pp2.x = Scale_X( &exec->metrics, subglyph->pp2.x );
}
/* is it a simple glyph ? */
if ( num_contours > 0 )
phase = Load_Simple;
else
phase = Load_Composite;
break;
/************************************************************/
/* */
/* Load_Simple state */
/* */
/* reading a simple glyph (num_contours must be set to */
/* the glyph's number of contours.) */
/* */
/* exit states : Load_End */
/* */
case Load_Simple:
new_flags = load_flags;
/* disable hinting when scaling */
if ( !subglyph->is_hinted )
new_flags &= ~TTLOAD_HINT_GLYPH;
error = Load_Simple_Glyph( exec,
stream,
num_contours,
left_contours,
left_points,
new_flags,
subglyph );
if ( error )
goto Fail;
/* Note: We could have put the simple loader source there */
/* but the code is fat enough already :-) */
num_points = exec->pts.n_points - 2;
phase = Load_End;
break;
/************************************************************/
/* */
/* Load_Composite state */
/* */
/* reading a composite glyph header a pushing a new */
/* load element on the stack. */
/* */
/* exit states: Load_Glyph */
/* */
case Load_Composite:
/* create a new element on the stack */
load_top++;
if ( load_top > face->maxComponents )
{
error = TT_Err_Invalid_Composite;
goto Fail;
}
subglyph2 = exec->loadStack + load_top;
Init_Glyph_Component( subglyph2, subglyph, NULL );
subglyph2->is_hinted = subglyph->is_hinted;
/* now read composite header */
if ( ACCESS_Frame( 4L ) )
goto Fail_File;
subglyph->element_flag = new_flags = GET_UShort();
subglyph2->index = GET_UShort();
FORGET_Frame();
k = 1 + 1;
if ( new_flags & ARGS_ARE_WORDS )
k *= 2;
if ( new_flags & WE_HAVE_A_SCALE )
k += 2;
else if ( new_flags & WE_HAVE_AN_XY_SCALE )
k += 4;
else if ( new_flags & WE_HAVE_A_2X2 )
k += 8;
if ( ACCESS_Frame( k ) )
goto Fail_File;
if ( new_flags & ARGS_ARE_WORDS )
{
k = GET_Short();
l = GET_Short();
}
else
{
k = GET_Char();
l = GET_Char();
}
subglyph->arg1 = k;
subglyph->arg2 = l;
if ( new_flags & ARGS_ARE_XY_VALUES )
{
subglyph->transform.ox = k;
subglyph->transform.oy = l;
}
xx = 1L << 16;
xy = 0;
yx = 0;
yy = 1L << 16;
if ( new_flags & WE_HAVE_A_SCALE )
{
xx = (Fixed)GET_Short() << 2;
yy = xx;
subglyph2->is_scaled = TRUE;
}
else if ( new_flags & WE_HAVE_AN_XY_SCALE )
{
xx = (Fixed)GET_Short() << 2;
yy = (Fixed)GET_Short() << 2;
subglyph2->is_scaled = TRUE;
}
else if ( new_flags & WE_HAVE_A_2X2 )
{
xx = (Fixed)GET_Short() << 2;
xy = (Fixed)GET_Short() << 2;
yx = (Fixed)GET_Short() << 2;
yy = (Fixed)GET_Short() << 2;
subglyph2->is_scaled = TRUE;
}
FORGET_Frame();
subglyph->transform.xx = xx;
subglyph->transform.xy = xy;
subglyph->transform.yx = yx;
subglyph->transform.yy = yy;
k = TT_MulFix( xx, yy ) - TT_MulFix( xy, yx );
/* disable hinting in case of scaling/slanting */
if ( ABS( k ) != (1L << 16) )
subglyph2->is_hinted = FALSE;
subglyph->file_offset = FILE_Pos();
phase = Load_Glyph;
break;
/************************************************************/
/* */
/* Load_End state */
/* */
/* after loading a glyph, apply transformation and offset */
/* where necessary, pops element and continue or */
/* stop process. */
/* */
/* exit states : Load_Composite and Load_Exit */
/* */
case Load_End:
if ( load_top > 0 )
{
subglyph2 = subglyph;
load_top--;
subglyph = exec->loadStack + load_top;
/* check advance width and left side bearing */
if ( !subglyph->preserve_pps &&
subglyph->element_flag & USE_MY_METRICS )
{
subglyph->metrics.horiBearingX = subglyph2->metrics.horiBearingX;
subglyph->metrics.horiAdvance = subglyph2->metrics.horiAdvance;
subglyph->pp1 = subglyph2->pp1;
subglyph->pp2 = subglyph2->pp2;
subglyph->preserve_pps = TRUE;
}
/* apply scale */
if ( subglyph2->is_scaled )
{
TT_Vector* cur = subglyph2->zone.cur;
TT_Vector* org = subglyph2->zone.org;
for ( u = 0; u < num_points; u++ )
{
nx = TT_MulFix( cur->x, subglyph->transform.xx ) +
TT_MulFix( cur->y, subglyph->transform.yx );
ny = TT_MulFix( cur->x, subglyph->transform.xy ) +
TT_MulFix( cur->y, subglyph->transform.yy );
cur->x = nx;
cur->y = ny;
nx = TT_MulFix( org->x, subglyph->transform.xx ) +
TT_MulFix( org->y, subglyph->transform.yx );
ny = TT_MulFix( org->x, subglyph->transform.xy ) +
TT_MulFix( org->y, subglyph->transform.yy );
org->x = nx;
org->y = ny;
cur++;
org++;
}
}
/* adjust counts */
num_elem_points = subglyph->zone.n_points;
for ( k = 0; k < num_contours; k++ )
subglyph2->zone.contours[k] += num_elem_points;
subglyph->zone.n_points += num_points;
subglyph->zone.n_contours += num_contours;
left_points -= num_points;
left_contours -= num_contours;
if ( !(subglyph->element_flag & ARGS_ARE_XY_VALUES) )
{
/* move second glyph according to control points */
/* the attach points are relative to the specific component */
u = (UShort)subglyph->arg1;
v = (UShort)subglyph->arg2;
if ( u >= num_elem_points ||
v >= num_points )
{
error = TT_Err_Invalid_Composite;
goto Fail;
}
/* adjust count */
v += num_elem_points;
x = subglyph->zone.cur[u].x - subglyph->zone.cur[v].x;
y = subglyph->zone.cur[u].y - subglyph->zone.cur[v].y;
}
else
{
/* apply offset */
x = subglyph->transform.ox;
y = subglyph->transform.oy;
if ( load_flags & TTLOAD_SCALE_GLYPH )
{
x = Scale_X( &exec->metrics, x );
y = Scale_Y( &exec->metrics, y );
if ( subglyph->element_flag & ROUND_XY_TO_GRID )
{
x = (x+32) & -64;
y = (y+32) & -64;
}
}
}
translate_array( num_points, subglyph2->zone.cur, x, y );
cur_to_org( num_points, &subglyph2->zone );
num_points = subglyph->zone.n_points;
num_contours = subglyph->zone.n_contours;
/* check for last component */
if ( FILE_Seek( subglyph->file_offset ) )
goto Fail_File;
if ( subglyph->element_flag & MORE_COMPONENTS )
phase = Load_Composite;
else
{
error = Load_Composite_End( num_points,
num_contours,
exec,
subglyph,
load_flags,
stream );
if ( error )
goto Fail;
phase = Load_End;
}
}
else
phase = Load_Exit;
break;
case Load_Exit:
break;
}
}
/* finally, copy the points arrays to the glyph object */
exec->pts = base_pts;
for ( u = 0; u < num_points + 2; u++ )
{
glyph->outline.points[u] = exec->pts.cur[u];
glyph->outline.flags [u] = exec->pts.touch[u];
}
for ( k = 0; k < num_contours; k++ )
glyph->outline.contours[k] = exec->pts.contours[k];
glyph->outline.n_points = num_points;
glyph->outline.n_contours = num_contours;
glyph->outline.second_pass = TRUE;
/* translate array so that (0,0) is the glyph's origin */
translate_array( num_points + 2,
glyph->outline.points,
-subglyph->pp1.x,
0 );
TT_Get_Outline_BBox( &glyph->outline, &glyph->metrics.bbox );
if ( subglyph->is_hinted )
{
/* grid-fit the bounding box */
glyph->metrics.bbox.xMin &= -64;
glyph->metrics.bbox.yMin &= -64;
glyph->metrics.bbox.xMax = (glyph->metrics.bbox.xMax+63) & -64;
glyph->metrics.bbox.yMax = (glyph->metrics.bbox.yMax+63) & -64;
}
/* get the device-independent scaled horizontal metrics */
/* take care of fixed-pitch fonts... */
{
TT_Pos left_bearing;
TT_Pos advance;
left_bearing = subglyph->metrics.horiBearingX;
advance = subglyph->metrics.horiAdvance;
if ( face->postscript.isFixedPitch )
advance = face->horizontalHeader.advance_Width_Max;
if ( load_flags & TTLOAD_SCALE_GLYPH )
{
left_bearing = Scale_X( &exec->metrics, left_bearing );
advance = Scale_X( &exec->metrics, advance );
}
glyph->metrics.linearHoriBearingX = left_bearing;
glyph->metrics.linearHoriAdvance = advance;
}
glyph->metrics.horiBearingX = glyph->metrics.bbox.xMin;
glyph->metrics.horiBearingY = glyph->metrics.bbox.yMax;
glyph->metrics.horiAdvance = subglyph->pp2.x - subglyph->pp1.x;
/* Now take care of vertical metrics. In the case where there is */
/* no vertical information within the font (relatively common), make */
/* up some metrics `by hand' ... */
{
Short top_bearing; /* vertical top side bearing (EM units) */
UShort advance_height; /* vertical advance height (EM units) */
TT_Pos left; /* scaled vertical left side bearing */
TT_Pos orig_top; /* scaled original vertical top side bearing */
TT_Pos top; /* scaled vertical top side bearing */
TT_Pos advance; /* scaled vertical advance height */
/* Get the unscaled `tsb' and `ah' values */
if ( face->verticalInfo &&
face->verticalHeader.number_Of_VMetrics > 0 )
{
/* Don't assume that both the vertical header and vertical */
/* metrics are present in the same font :-) */
TT_Get_Metrics( (TT_Horizontal_Header*)&face->verticalHeader,
glyph_index,
&top_bearing,
&advance_height );
}
else
{
/* Make up the distances from the horizontal header.. */
/* NOTE: The OS/2 values are the only `portable' ones, */
/* which is why we use them... */
/* */
/* NOTE2: The sTypoDescender is negative, which is why */
/* we compute the baseline-to-baseline distance */
/* here with : */
/* ascender - descender + linegap */
/* */
/* XXX What happens here with these Apple fonts without OS/2 table ? */
top_bearing = (Short) (face->os2.sTypoLineGap / 2);
advance_height = (UShort)(face->os2.sTypoAscender -
face->os2.sTypoDescender +
face->os2.sTypoLineGap);
}
/* We must adjust the top_bearing value from the bounding box */
/* given in the glyph header to te bounding box calculated with */
/* TT_Get_Outline_BBox() */
/* scale the metrics */
if ( load_flags & TTLOAD_SCALE_GLYPH )
{
orig_top = Scale_Y( &exec->metrics, top_bearing );
top = Scale_Y( &exec->metrics,
top_bearing + subglyph->metrics.bbox.yMax ) -
glyph->metrics.bbox.yMax;
advance = Scale_Y( &exec->metrics, advance_height );
}
else
{
orig_top = top_bearing;
top = top_bearing + subglyph->metrics.bbox.yMax -
glyph->metrics.bbox.yMax;
advance = advance_height;
}
glyph->metrics.linearVertBearingY = orig_top;
glyph->metrics.linearVertAdvance = advance;
/* XXX : for now, we have no better algo for the lsb, but it should */
/* work ok.. */
/* */
left = ( glyph->metrics.bbox.xMin - glyph->metrics.bbox.xMax ) / 2;
/* grid-fit them if necessary */
if ( subglyph->is_hinted )
{
left &= -64;
top = (top + 63) & -64;
advance = (advance + 32) & -64;
}
glyph->metrics.vertBearingX = left;
glyph->metrics.vertBearingY = top;
glyph->metrics.vertAdvance = advance;
}
/* Adjust advance width to the value contained in the hdmx table. */
if ( !exec->face->postscript.isFixedPitch && instance &&
subglyph->is_hinted )
{
widths = Get_Advance_Widths( exec->face,
exec->instance->metrics.x_ppem );
if ( widths )
glyph->metrics.horiAdvance = widths[glyph_index] << 6;
}
glyph->outline.dropout_mode = (Char)exec->GS.scan_type;
error = TT_Err_Ok;
Fail_File:
Fail:
DONE_Stream( stream );
Fin:
/* reset the execution context */
exec->pts = base_pts;
if ( !instance || !instance->debug )
Done_Context( exec );
return error;
}
static
FT_Error Load_Format_20( TT_Face face,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_Int num_glyphs;
FT_UShort num_names;
FT_UShort* glyph_indices = 0;
FT_Char** name_strings = 0;
if ( READ_UShort( num_glyphs ) )
goto Exit;
/* UNDOCUMENTED! The number of glyphs in this table can be smaller */
/* than the value in the maxp table (cf. cyberbit.ttf). */
/* There already exist fonts which have more than 32768 glyph names */
/* in this table, so the test for this threshold has been dropped. */
if ( num_glyphs > face->root.num_glyphs )
{
error = TT_Err_Invalid_File_Format;
goto Exit;
}
/* load the indices */
{
FT_Int n;
if ( ALLOC_ARRAY ( glyph_indices, num_glyphs, FT_UShort ) ||
ACCESS_Frame( num_glyphs * 2L ) )
goto Fail;
for ( n = 0; n < num_glyphs; n++ )
glyph_indices[n] = GET_UShort();
FORGET_Frame();
}
/* compute number of names stored in table */
{
FT_Int n;
num_names = 0;
for ( n = 0; n < num_glyphs; n++ )
{
FT_Int index;
index = glyph_indices[n];
if ( index >= 258 )
{
index -= 257;
if ( index > num_names )
num_names = index;
}
}
}
/* now load the name strings */
{
FT_UShort n;
if ( ALLOC_ARRAY( name_strings, num_names, FT_Char* ) )
goto Fail;
for ( n = 0; n < num_names; n++ )
{
FT_UInt len;
if ( READ_Byte ( len ) ||
ALLOC_ARRAY( name_strings[n], len + 1, FT_Char ) ||
FILE_Read ( name_strings[n], len ) )
goto Fail1;
name_strings[n][len] = '\0';
}
}
/* all right, set table fields and exit successfuly */
{
TT_Post_20* table = &face->postscript_names.names.format_20;
table->num_glyphs = num_glyphs;
table->num_names = num_names;
table->glyph_indices = glyph_indices;
table->glyph_names = name_strings;
}
return TT_Err_Ok;
Fail1:
{
FT_UShort n;
for ( n = 0; n < num_names; n++ )
FREE( name_strings[n] );
}
Fail:
FREE( name_strings );
FREE( glyph_indices );
Exit:
return error;
}
FT_LOCAL_DEF
FT_Error TT_CharMap_Load( TT_Face face,
TT_CMapTable* cmap,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory;
FT_UShort num_SH, num_Seg, i;
FT_UShort u, l;
TT_CMap0* cmap0;
TT_CMap2* cmap2;
TT_CMap4* cmap4;
TT_CMap6* cmap6;
TT_CMap2SubHeader* cmap2sub;
TT_CMap4Segment* segments;
if ( cmap->loaded )
return TT_Err_Ok;
memory = stream->memory;
if ( FILE_Seek( cmap->offset ) )
return error;
switch ( cmap->format )
{
case 0:
cmap0 = &cmap->c.cmap0;
if ( ALLOC( cmap0->glyphIdArray, 256L ) ||
FILE_Read( cmap0->glyphIdArray, 256L ) )
goto Fail;
cmap->get_index = code_to_index0;
break;
case 2:
num_SH = 0;
cmap2 = &cmap->c.cmap2;
/* allocate subheader keys */
if ( ALLOC_ARRAY( cmap2->subHeaderKeys, 256, FT_UShort ) ||
ACCESS_Frame( 512L ) )
goto Fail;
for ( i = 0; i < 256; i++ )
{
u = GET_UShort() / 8;
cmap2->subHeaderKeys[i] = u;
if ( num_SH < u )
num_SH = u;
}
FORGET_Frame();
/* load subheaders */
cmap2->numGlyphId = l =
( ( cmap->length - 2L * ( 256 + 3 ) - num_SH * 8L ) & 0xFFFF ) / 2;
if ( ALLOC_ARRAY( cmap2->subHeaders,
num_SH + 1,
TT_CMap2SubHeader ) ||
ACCESS_Frame( ( num_SH + 1 ) * 8L ) )
goto Fail;
cmap2sub = cmap2->subHeaders;
for ( i = 0; i <= num_SH; i++ )
{
cmap2sub->firstCode = GET_UShort();
cmap2sub->entryCount = GET_UShort();
cmap2sub->idDelta = GET_Short();
/* we apply the location offset immediately */
cmap2sub->idRangeOffset = GET_UShort() - ( num_SH - i ) * 8 - 2;
cmap2sub++;
}
FORGET_Frame();
/* load glyph IDs */
if ( ALLOC_ARRAY( cmap2->glyphIdArray, l, FT_UShort ) ||
ACCESS_Frame( l * 2L ) )
goto Fail;
for ( i = 0; i < l; i++ )
cmap2->glyphIdArray[i] = GET_UShort();
FORGET_Frame();
cmap->get_index = code_to_index2;
break;
case 4:
cmap4 = &cmap->c.cmap4;
/* load header */
if ( ACCESS_Frame( 8L ) )
goto Fail;
cmap4->segCountX2 = GET_UShort();
cmap4->searchRange = GET_UShort();
cmap4->entrySelector = GET_UShort();
cmap4->rangeShift = GET_UShort();
num_Seg = cmap4->segCountX2 / 2;
FORGET_Frame();
/* load segments */
if ( ALLOC_ARRAY( cmap4->segments,
num_Seg,
TT_CMap4Segment ) ||
ACCESS_Frame( ( num_Seg * 4 + 1 ) * 2L ) )
goto Fail;
segments = cmap4->segments;
for ( i = 0; i < num_Seg; i++ )
segments[i].endCount = GET_UShort();
(void)GET_UShort();
for ( i = 0; i < num_Seg; i++ )
segments[i].startCount = GET_UShort();
for ( i = 0; i < num_Seg; i++ )
segments[i].idDelta = GET_Short();
for ( i = 0; i < num_Seg; i++ )
segments[i].idRangeOffset = GET_UShort();
FORGET_Frame();
cmap4->numGlyphId = l =
( ( cmap->length - ( 16L + 8L * num_Seg ) ) & 0xFFFF ) / 2;
/* load IDs */
if ( ALLOC_ARRAY( cmap4->glyphIdArray, l, FT_UShort ) ||
ACCESS_Frame( l * 2L ) )
goto Fail;
for ( i = 0; i < l; i++ )
cmap4->glyphIdArray[i] = GET_UShort();
FORGET_Frame();
cmap->get_index = code_to_index4;
cmap4->last_segment = cmap4->segments;
break;
case 6:
cmap6 = &cmap->c.cmap6;
if ( ACCESS_Frame( 4L ) )
goto Fail;
cmap6->firstCode = GET_UShort();
cmap6->entryCount = GET_UShort();
FORGET_Frame();
l = cmap6->entryCount;
if ( ALLOC_ARRAY( cmap6->glyphIdArray,
cmap6->entryCount,
FT_Short ) ||
ACCESS_Frame( l * 2L ) )
goto Fail;
for ( i = 0; i < l; i++ )
cmap6->glyphIdArray[i] = GET_UShort();
FORGET_Frame();
cmap->get_index = code_to_index6;
break;
default: /* corrupt character mapping table */
return TT_Err_Invalid_CharMap_Format;
}
return TT_Err_Ok;
Fail:
TT_CharMap_Free( face, cmap );
return error;
}
TT_Get_Face_Widths( TT_Face face,
TT_UShort first_glyph,
TT_UShort last_glyph,
TT_UShort* widths,
TT_UShort* heights )
{
DEFINE_ALL_LOCALS;
PFace faze = HANDLE_Face(face);
UShort n;
Long table;
ULong glyf_offset; /* offset of glyph table in file */
UShort zero_width = 0; /* width of glyph 0 */
UShort zero_height = 0; /* height of glyph 0 */
Bool zero_loaded = 0;
#ifndef TT_HUGE_PTR
PStorage locations;
#else
Storage TT_HUGE_PTR * locations;
#endif
TT_BBox bbox;
if ( !faze )
return TT_Err_Invalid_Face_Handle;
if ( last_glyph >= faze->numGlyphs ||
first_glyph > last_glyph )
return TT_Err_Invalid_Argument;
/* find "glyf" table */
table = TT_LookUp_Table( faze, TTAG_glyf );
if ( table < 0 )
{
PERROR(( "ERROR: there is no glyph table in this font file!\n" ));
return TT_Err_Glyf_Table_Missing;
}
glyf_offset = faze->dirTables[table].Offset;
/* now access stream */
if ( USE_Stream( faze->stream, stream ) )
return error;
locations = faze->glyphLocations + first_glyph;
/* loop to load each glyph in the range */
for ( n = first_glyph; n <= last_glyph; n++ )
{
if ( n + 1 < faze->numGlyphs &&
locations[0] == locations[1] )
{
/* Note : Glyph 0 is always used to indicate a missing glyph */
/* in a range. We must thus return its width and height */
/* where appropriate when we find an undefined glyph. */
if ( zero_loaded == 0 )
{
if ( FILE_Seek( glyf_offset + faze->glyphLocations[0] ) ||
ACCESS_Frame( 10L ) )
goto Fail;
(void)GET_Short(); /* skip number of contours */
bbox.xMin = GET_Short();
bbox.yMin = GET_Short();
bbox.xMax = GET_Short();
bbox.yMax = GET_Short();
FORGET_Frame();
zero_width = (UShort)(bbox.xMax - bbox.xMin);
zero_height = (UShort)(bbox.yMax - bbox.yMin);
zero_loaded = 1;
}
if ( widths )
*widths++ = zero_width;
if ( heights )
*heights++ = zero_height;
}
else
{
/* normal glyph, read header */
if ( FILE_Seek( glyf_offset + locations[0] ) ||
ACCESS_Frame( 10L ) )
goto Fail;
(void)GET_Short(); /* skip number of contours */
bbox.xMin = GET_Short();
bbox.yMin = GET_Short();
bbox.xMax = GET_Short();
bbox.yMax = GET_Short();
FORGET_Frame();
if ( widths )
*widths++ = (UShort)(bbox.xMax - bbox.xMin);
if ( heights )
*heights++ = (UShort)(bbox.yMax - bbox.yMin);
}
}
Fail:
DONE_Stream( stream );
return error;
}
static HB_Error Load_CaretValue( HB_CaretValue* cv,
HB_Stream stream )
{
HB_Error error;
HB_UInt cur_offset, new_offset, base_offset;
base_offset = FILE_Pos();
if ( ACCESS_Frame( 2L ) )
return error;
cv->CaretValueFormat = GET_UShort();
FORGET_Frame();
switch ( cv->CaretValueFormat )
{
case 1:
if ( ACCESS_Frame( 2L ) )
return error;
cv->cvf.cvf1.Coordinate = GET_Short();
FORGET_Frame();
break;
case 2:
if ( ACCESS_Frame( 2L ) )
return error;
cv->cvf.cvf2.CaretValuePoint = GET_UShort();
FORGET_Frame();
break;
case 3:
if ( ACCESS_Frame( 4L ) )
return error;
cv->cvf.cvf3.Coordinate = GET_Short();
new_offset = GET_UShort() + base_offset;
FORGET_Frame();
cur_offset = FILE_Pos();
if ( FILE_Seek( new_offset ) ||
( error = _HB_OPEN_Load_Device( &cv->cvf.cvf3.Device,
stream ) ) != HB_Err_Ok )
return error;
(void)FILE_Seek( cur_offset );
break;
case 4:
if ( ACCESS_Frame( 2L ) )
return error;
#ifdef HB_SUPPORT_MULTIPLE_MASTER
cv->cvf.cvf4.IdCaretValue = GET_UShort();
#else
(void) GET_UShort();
#endif
FORGET_Frame();
break;
default:
return ERR(HB_Err_Invalid_SubTable_Format);
}
return HB_Err_Ok;
}
