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Work around a mysterious no-image zoom issue

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Přemysl Eric Janouch 2022-07-17 09:36:00 +02:00
parent 8f98c623ee
commit 47b7600f5e
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 8 additions and 2 deletions
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fiv-view.c
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@ -506,8 +506,8 @@ fiv_view_realize(GtkWidget *widget)
//
// It completely breaks the Quartz backend, so limit it to X11.
#ifdef GDK_WINDOWING_X11
// FIXME: This causes some flicker while scrolling, because it disables
// double buffering, see: https://gitlab.gnome.org/GNOME/gtk/-/issues/2560
// Note that this disables double buffering, and sometimes causes artefacts,
// see: https://gitlab.gnome.org/GNOME/gtk/-/issues/2560
//
// If GTK+'s OpenGL integration fails to deliver, we need to use the window
// directly, sidestepping the toolkit entirely.
@ -647,6 +647,12 @@ set_scale_to_fit(FivView *self, bool scale_to_fit)
static gboolean
set_scale(FivView *self, double scale, const GdkEvent *event)
{
// FIXME: Zooming to exactly 1:1 breaks rendering with some images
// when using a native X11 Window. This is a silly workaround.
GdkWindow *window = gtk_widget_get_window(GTK_WIDGET(self));
if (window && gdk_window_has_native(window) && scale == 1)
scale = 1.000000000000001;
if (self->scale == scale)
goto out;