The Tor Browser / file revision

 diff --git a/gfx/cairo/cairo/src/cairo-win32-font.c b/gfx/cairo/cairo/src/cairo-win32-font.c

 --- a/gfx/cairo/cairo/src/cairo-win32-font.c

 +++ b/gfx/cairo/cairo/src/cairo-win32-font.c

 @@ -986,6 +986,19 @@ _cairo_win32_scaled_font_init_glyph_metr

  			      &metrics, 0, NULL, &matrix) == GDI_ERROR) {

  	  status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_init_glyph_metrics:GetGlyphOutlineW");

  	  memset (&metrics, 0, sizeof (GLYPHMETRICS));

 +	} else {

 +	    if (metrics.gmBlackBoxX > 0 && scaled_font->base.options.antialias != CAIRO_ANTIALIAS_NONE) {

 +		/* The bounding box reported by Windows supposedly contains the glyph's "black" area;

 +		 * however, antialiasing (especially with ClearType) means that the actual image that

 +		 * needs to be rendered may "bleed" into the adjacent pixels, mainly on the right side.

 +		 * To avoid clipping the glyphs when drawn by _cairo_surface_fallback_show_glyphs,

 +		 * for example, or other code that uses glyph extents to determine the area to update,

 +		 * we add a pixel of "slop" to left side of the nominal "black" area returned by GDI,

 +		 * and two pixels to the right (as tests show some glyphs bleed into this column).

 +		 */

 +		metrics.gmptGlyphOrigin.x -= 1;

 +		metrics.gmBlackBoxX += 3;

 +	    }

  	}

  	cairo_win32_scaled_font_done_font (&scaled_font->base);

  	if (status)