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widget: Use subpixel positioning

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Before turning off pangos rounding of glyph positions,
we must check if the cairo we are using is new enough
to have working subpixel positioning (the relevant
cairo commit is 52a7c79fd4ff96bb5fac175f0199819b0f8c18fc).
This commit is contained in:
Matthias Clasen 2021-01-28 18:17:22 -05:00
parent 0d0bdaa02e
commit da59c77ae2
1 changed files with 3 additions and 1 deletions
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4
gtk/gtkwidget.c
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@ -6305,9 +6305,11 @@ update_pango_context (GtkWidget *widget,
font_desc = gtk_css_style_get_pango_font (style);
pango_context_set_font_description (context, font_desc);
pango_font_description_free (font_desc);
if (cairo_version () >= CAIRO_VERSION_ENCODE (1, 17, 4))
pango_context_set_round_glyph_positions (context, FALSE);
pango_context_set_base_dir (context,
_gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR ?
PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL);