static FT_Error
tt_size_select( FT_Size size,
FT_ULong strike_index )
{
TT_Face ttface = (TT_Face)size->face;
TT_Size ttsize = (TT_Size)size;
FT_Error error = FT_Err_Ok;
ttsize->strike_index = strike_index;
if ( FT_IS_SCALABLE( size->face ) )
{
/* use the scaled metrics, even when tt_size_reset fails */
FT_Select_Metrics( size->face, strike_index );
tt_size_reset( ttsize );
}
else
{
SFNT_Service sfnt = (SFNT_Service) ttface->sfnt;
FT_Size_Metrics* metrics = &size->metrics;
error = sfnt->load_strike_metrics( ttface, strike_index, metrics );
if ( error )
ttsize->strike_index = 0xFFFFFFFFUL;
}
return error;
}
static FT_Error
tt_size_request( FT_Size size,
FT_Size_Request req )
{
TT_Size ttsize = (TT_Size)size;
FT_Error error = TT_Err_Ok;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
if ( FT_HAS_FIXED_SIZES( size->face ) )
{
TT_Face ttface = (TT_Face)size->face;
SFNT_Service sfnt = (SFNT_Service) ttface->sfnt;
FT_ULong strike_index;
error = sfnt->set_sbit_strike( ttface, req, &strike_index );
if ( error )
ttsize->strike_index = 0xFFFFFFFFUL;
else
return tt_size_select( size, strike_index );
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
FT_Request_Metrics( size->face, req );
if ( FT_IS_SCALABLE( size->face ) )
error = tt_size_reset( ttsize );
return error;
}
static FT_Error
tt_size_request( FT_Size size,
FT_Size_Request req )
{
TT_Size ttsize = (TT_Size)size;
FT_Error error = FT_Err_Ok;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
if ( FT_HAS_FIXED_SIZES( size->face ) )
{
TT_Face ttface = (TT_Face)size->face;
SFNT_Service sfnt = (SFNT_Service)ttface->sfnt;
FT_ULong strike_index;
error = sfnt->set_sbit_strike( ttface, req, &strike_index );
if ( error )
ttsize->strike_index = 0xFFFFFFFFUL;
else
return tt_size_select( size, strike_index );
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
FT_Request_Metrics( size->face, req );
if ( FT_IS_SCALABLE( size->face ) )
{
error = tt_size_reset( ttsize );
ttsize->root.metrics = ttsize->metrics;
#ifdef TT_USE_BYTECODE_INTERPRETER
/* for the `MPS' bytecode instruction we need the point size */
{
FT_UInt resolution = ttsize->metrics.x_ppem > ttsize->metrics.y_ppem
? req->horiResolution
: req->vertResolution;
/* if we don't have a resolution value, assume 72dpi */
if ( req->type == FT_SIZE_REQUEST_TYPE_SCALES ||
!resolution )
resolution = 72;
ttsize->point_size = FT_MulDiv( ttsize->ttmetrics.ppem,
64 * 72,
resolution );
}
#endif
}
return error;
}
static FT_Error
Set_Char_Sizes( FT_Size ttsize, /* TT_Size */
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
TT_Size size = (TT_Size)ttsize;
FT_Size_Metrics* metrics = &size->root.metrics;
FT_Size_Metrics* metrics2 = &size->metrics;
TT_Face face = (TT_Face)size->root.face;
FT_Long dim_x, dim_y;
*metrics2 = *metrics;
/* This bit flag, when set, indicates that the pixel size must be */
/* truncated to an integer. Nearly all TrueType fonts have this */
/* bit set, as hinting won't work really well otherwise. */
/* */
if ( ( face->header.Flags & 8 ) != 0 )
{
/* we need to use rounding in the following computations. Otherwise,
* the resulting hinted outlines will be very slightly distorted
*/
dim_x = ( ( char_width * horz_resolution + (36+32*72) ) / 72 ) & ~63;
dim_y = ( ( char_height * vert_resolution + (36+32*72) ) / 72 ) & ~63;
}
else
{
dim_x = ( ( char_width * horz_resolution + 36 ) / 72 );
dim_y = ( ( char_height * vert_resolution + 36 ) / 72 );
}
/* we only modify "metrics2", not "metrics", so these changes have */
/* no effect on the result of the auto-hinter when it is used */
/* */
metrics2->x_ppem = (FT_UShort)( dim_x >> 6 );
metrics2->y_ppem = (FT_UShort)( dim_y >> 6 );
metrics2->x_scale = FT_DivFix( dim_x, face->root.units_per_EM );
metrics2->y_scale = FT_DivFix( dim_y, face->root.units_per_EM );
size->ttmetrics.valid = FALSE;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
size->strike_index = 0xFFFFU;
#endif
return tt_size_reset( size );
}
static FT_Error
Load_Glyph( FT_GlyphSlot ttslot, /* TT_GlyphSlot */
FT_Size ttsize, /* TT_Size */
FT_UInt glyph_index,
FT_Int32 load_flags )
{
TT_GlyphSlot slot = (TT_GlyphSlot)ttslot;
TT_Size size = (TT_Size)ttsize;
FT_Error error;
if ( !slot )
return TT_Err_Invalid_Slot_Handle;
/* check whether we want a scaled outline or bitmap */
if ( !size )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
if ( load_flags & FT_LOAD_NO_SCALE )
size = NULL;
/* reset the size object if necessary */
if ( size )
{
/* these two object must have the same parent */
if ( size->root.face != slot->face )
return TT_Err_Invalid_Face_Handle;
if ( !size->ttmetrics.valid )
{
if ( FT_SET_ERROR( tt_size_reset( size ) ) )
return error;
}
}
/* now load the glyph outline if necessary */
error = TT_Load_Glyph( size, slot, glyph_index, load_flags );
/* force drop-out mode to 2 - irrelevant now */
/* slot->outline.dropout_mode = 2; */
return error;
}
static FT_Error
Set_Pixel_Sizes( FT_Size ttsize, /* TT_Size */
FT_UInt pixel_width,
FT_UInt pixel_height )
{
TT_Size size = (TT_Size)ttsize;
FT_UNUSED( pixel_width );
FT_UNUSED( pixel_height );
/* many things have been pre-computed by the base layer */
size->metrics = size->root.metrics;
size->ttmetrics.valid = FALSE;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
size->strike_index = 0xFFFFU;
#endif
return tt_size_reset( size );
}
