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 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;
}
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;
}
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;
}
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;
}
