Lerking/gtk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

widget: Delay deciding font rendering

Browse Source 
Don't translate the font rendering setting into font options
ahead of time. Instead just avoid rounding to application pixels
during layout, and pass the font rendering setting to gsk for
a later decision.
This commit is contained in:
Matthias Clasen
2024-04-26 22:25:38 -04:00
parent 4184e09429
commit 4ef73f74e5
1 changed files with 10 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
gtk/gtkwidget.c
View File

@@ -6513,39 +6513,22 @@ gtk_widget_update_pango_context (GtkWidget *widget,
else
{
cairo_font_options_t *options;
double dpi = 96.;
GdkSurface *surface;
surface = gtk_widget_get_surface (widget);
if (surface)
{
GdkDisplay *display;
GdkMonitor *monitor;
display = gdk_surface_get_display (surface);
monitor = gdk_display_get_monitor_at_surface (display, surface);
if (monitor)
dpi = gdk_monitor_get_dpi (monitor);
}
options = cairo_font_options_create ();
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY);
/* HACK: Use CAIRO_ANTIALIAS_GOOD to communicate 'automatic' to gsk */
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GOOD);
if (dpi < 200.)
{
/* Not high-dpi. Prefer sharpness by enabling hinting */
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_ON);
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_SLIGHT);
}
else
{
/* High-dpi. Prefer precise positioning */
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
}
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
/* Don't do any rounding during layout. In particular with fractional
* scaling, we want to avoid rounding to application pixels, since the
* may not align with the device pixel grid.
*/
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
pango_context_set_round_glyph_positions (context, FALSE);
pango_cairo_context_set_font_options (context, options);
cairo_font_options_destroy (options);