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_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_Err_Invalid_Face_Handle;
num = (FT_UInt)face->num_glyphs;
end = start + count;
if ( start >= num || end < start || end > num )
return FT_Err_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 )
goto Exit;
if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) )
return error;
}
error = FT_Err_Ok;
if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
return FT_Err_Unimplemented_Feature;
flags |= FT_LOAD_ADVANCE_ONLY;
for ( nn = 0; nn < count; nn++ )
{
error = FT_Load_Glyph( face, start + nn, flags );
if ( error )
break;
padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
? face->glyph->advance.x
: face->glyph->advance.y;
}
if ( error )
return error;
Exit:
return _ft_face_scale_advances( face, padvances, count, flags );
}