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widget: Push a transform node if we need to

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This is the same as the old code since the transformation only contains
teh offset right now, but it will be different later where arbitrary
transformations are possible per widget.
This commit is contained in:
Timm Bäder
2019-02-16 15:29:05 +01:00
parent 10e5856583
commit ca2c05cdb3
1 changed files with 9 additions and 4 deletions
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13
gtk/gtkwidget.c
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@@ -13528,16 +13528,21 @@ gtk_widget_snapshot_child (GtkWidget *widget,
GtkWidget *child,
GtkSnapshot *snapshot)
{
int x, y;
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (child);
gboolean needs_transform;
g_return_if_fail (_gtk_widget_get_parent (child) == widget);
g_return_if_fail (snapshot != NULL);
gtk_widget_get_origin_relative_to_parent (child, &x, &y);
needs_transform = !graphene_matrix_is_identity (&priv->transform);
if (needs_transform)
gtk_snapshot_push_transform (snapshot, &priv->transform);
gtk_snapshot_offset (snapshot, x, y);
gtk_widget_snapshot (child, snapshot);
gtk_snapshot_offset (snapshot, -x, -y);
if (needs_transform)
gtk_snapshot_pop (snapshot);
}
/**