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rendernodepaintable: Provide accurate aspect ratio

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Since we report width and height as integers, the
default implementation of this introduces rounding
errors. This shows up in the node-editor, as having
uneven scale factors like sx=1.0 and sy=1.0035.
Text nodes don't handle uneven scales like that well
and overdraw.
This commit is contained in:
Matthias Clasen 2021-09-17 09:28:12 -04:00
parent 8c34dd58c0
commit 52a8492887
1 changed files with 12 additions and 0 deletions
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12
gtk/gtkrendernodepaintable.c
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@ -87,6 +87,17 @@ gtk_render_node_paintable_paintable_get_intrinsic_height (GdkPaintable *paintabl
return ceilf (self->bounds.size.height);
}
static double
gtk_render_node_paintable_paintable_get_intrinsic_aspect_ratio (GdkPaintable *paintable)
{
GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (paintable);
if (self->bounds.size.height != 0)
return self->bounds.size.width / self->bounds.size.height;
return 0;
}
static void
gtk_render_node_paintable_paintable_init (GdkPaintableInterface *iface)
{
@ -94,6 +105,7 @@ gtk_render_node_paintable_paintable_init (GdkPaintableInterface *iface)
iface->get_flags = gtk_render_node_paintable_paintable_get_flags;
iface->get_intrinsic_width = gtk_render_node_paintable_paintable_get_intrinsic_width;
iface->get_intrinsic_height = gtk_render_node_paintable_paintable_get_intrinsic_height;
iface->get_intrinsic_aspect_ratio = gtk_render_node_paintable_paintable_get_intrinsic_aspect_ratio;
}
G_DEFINE_TYPE_EXTENDED (GtkRenderNodePaintable, gtk_render_node_paintable, G_TYPE_OBJECT, 0,