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libgnomecanvas: Add few checks for argument validity

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The public API should check the passed-in arguments are valid. This
change tries to workaround a crash reported downstream:
https://bugzilla.redhat.com/show_bug.cgi?id=2316971
This commit is contained in:
Milan Crha
2024-10-08 13:24:42 +02:00
parent 09a1e717b3
commit 4530b4ecc1
1 changed files with 5 additions and 0 deletions
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5
src/libgnomecanvas/gnome-canvas.c
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@ -1041,6 +1041,7 @@ gnome_canvas_item_i2c_matrix (GnomeCanvasItem *item,
cairo_matrix_t *matrix)
{
cairo_matrix_t i2w, w2c;
g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
gnome_canvas_item_i2w_matrix (item, &i2w);
gnome_canvas_w2c_matrix (item->canvas, &w2c);
@ -1215,6 +1216,8 @@ gnome_canvas_item_get_bounds (GnomeCanvasItem *item,
void
gnome_canvas_item_request_update (GnomeCanvasItem *item)
{
g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
if (item->flags & GNOME_CANVAS_ITEM_NEED_UPDATE)
return;
@ -3173,12 +3176,14 @@ gnome_canvas_get_item_at (GnomeCanvas *canvas,
static void
gnome_canvas_request_update (GnomeCanvas *canvas)
{
g_return_if_fail (GNOME_IS_CANVAS (canvas));
GNOME_CANVAS_GET_CLASS (canvas)->request_update (canvas);
}
static void
gnome_canvas_request_update_real (GnomeCanvas *canvas)
{
g_return_if_fail (GNOME_IS_CANVAS (canvas));
if (canvas->need_update)
return;