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GTK: create backing Cairo surface of similar type to window

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Specifically, this creates the surface using
gdk_window_create_similar_surface() where that's available.
This commit is contained in:
Ben Harris 2025-04-19 09:13:06 +01:00
parent c93a225b97
commit daed7200b3
1 changed files with 6 additions and 0 deletions
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6
unix/window.c
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@ -819,8 +819,14 @@ static void drawing_area_setup(GtkFrontend *inst, int width, int height)
inst->surface = NULL; inst->surface = NULL;
} }
#if GTK_CHECK_VERSION(2,22,0)
inst->surface = gdk_window_create_similar_surface(
gtk_widget_get_window(inst->area),
CAIRO_CONTENT_COLOR, inst->backing_w, inst->backing_h);
#else
inst->surface = cairo_image_surface_create( inst->surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, inst->backing_w, inst->backing_h); CAIRO_FORMAT_ARGB32, inst->backing_w, inst->backing_h);
#endif
#endif #endif
draw_backing_rect(inst); draw_backing_rect(inst);