@ -90,34 +90,50 @@ impl CachingShaper {
let mut font_size = self . current_size ( ) ;
trace ! ( "Using font_size: {:.2}px" , font_size ) ;
self . font_loader = FontLoader ::new ( font_size ) ;
let font_width = self . metrics ( ) . average_width ;
trace ! ( "Font width: {:.2}px" , font_width ) ;
let ( metrics , font_width ) = self . info ( ) ;
trace ! (
"Font width: {:.2}px {:.2}px" ,
font_width ,
metrics . average_width
) ;
self . fudge_factor = font_width . round ( ) / font_width ;
trace ! ( "Fudge factor: {:.2}" , self . fudge_factor ) ;
font_size = self . current_size ( ) ;
trace ! ( "Fudged font size: {:.2}px" , font_size ) ;
trace ! ( "Fudged font width: {:.2}px" , self . metrics( ) . average_width ) ;
trace ! ( "Fudged font width: {:.2}px" , self . info( ) . 1 ) ;
self . font_loader = FontLoader ::new ( font_size ) ;
self . blob_cache . clear ( ) ;
}
fn metrics( & mut self ) -> Metrics {
fn info( & mut self ) -> ( Metrics , f32 ) {
let font_pair = self . current_font_pair ( ) ;
let size = self . current_size ( ) ;
let shaper = self
let mut shaper = self
. shape_context
. builder ( font_pair . swash_font . as_ref ( ) )
. size ( size )
. build ( ) ;
shaper . add_str ( "M" ) ;
let metrics = shaper . metrics ( ) ;
let mut advance = metrics . average_width ;
shaper . shape_with ( | cluster | {
advance = cluster
. glyphs
. first ( )
. map_or ( metrics . average_width , | g | g . advance ) ;
} ) ;
( metrics , advance )
}
shaper . metrics ( )
fn metrics ( & mut self ) -> Metrics {
self . info ( ) . 0
}
pub fn font_base_dimensions ( & mut self ) -> ( u64 , u64 ) {
let metrics = self . metrics ( ) ;
let ( metrics , glyph_advance ) = self . info ( ) ;
let font_height = ( metrics . ascent + metrics . descent + metrics . leading ) . ceil ( ) as u64 ;
let font_width = metrics . average_width . round ( ) as u64 ;
let font_width = ( glyph_advance + 0.5 ) . floor ( ) as u64 ;
( font_width , font_height )
}