c++ - Underline is drawn outside of rectangle reported by DrawText with DT_CALCRECT -


symptoms

i'm having issue recent version 2.0 of lato font in "regular" variant. issue doesn't appear lato 1.0.

it seems underline drawn 1px below rectangle reported drawtext() dt_calcrect flag.

in following screenshots calculated rectangle indicated blue background. i've added 10px right of rectangle can see discrepancy position underline drawn.

lato 2.0 - underline incorrectly drawn outside of rectangle reported dt_calcrect:

lato 2.0

lato 1.0 - underline correctly drawn inside of rectangle reported dt_calcrect:

lato 1.0

mcve

  • can reproduced on win 10 , win 7 (win 8 not tested)
  • download , install lato 2.0 regular font (lato-regular.ttf).
  • create dialog based mfc application using wizard , replace onpaint() handler of dialog sample code.

sample code onpaint():

cpaintdc dc{ };  crect rect; getclientrect( &rect );  logfontw lf{}; wcscpy_s( lf.lffacename, l"lato" ); lf.lfheight = 20 * 10;  // tenths of point lf.lfweight = fw_normal; lf.lfunderline = true;  cfont font; verify( font.createpointfontindirect( &lf ) );  const int saved = dc.savedc();  dc.selectobject( &font ); dc.setbkmode( transparent ); dc.settextcolor( rgb( 0, 0, 0 ) );    const cstring text = l"hello lato"; const dword dtflags = 0;  // calculate size required text , fill rectangle crect textrect = rect; dc.drawtext( text, textrect, dtflags | dt_calcrect ); textrect.right += 10; dc.fillsolidrect( 0, 0, textrect.right, textrect.bottom, rgb( 180, 180, 255 ) );  // draw text dc.drawtextw( text, rect, dtflags );  if( saved )     dc.restoredc( saved );

question

do think issue in code, bug in os or bug in font?

unfortunately can't use lato 1.0 lato 2.0 added support many new languages software needs support.


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