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stage: Check coordinate validity in do_pick()

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We do some argument validation inside _clutter_stage_do_pick(), which is
the internal version of clutter_stage_get_actor_at_pos(), but we don't
do coordinate space validation, and instead we rely on call sites doing
the right thing.

We should, instead, remove the argument validation from the internal
function, which is pointless and against the coding practices, but do
coordinate space validation internally.

https://bugzilla.gnome.org/show_bug.cgi?id=722322
This commit is contained in:
Emmanuele Bassi 2014-01-15 16:39:35 +00:00
parent da66dd01ef
commit 33316ce168
1 changed files with 20 additions and 22 deletions
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42
clutter/clutter-stage.c
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@ -1430,17 +1430,19 @@ _clutter_stage_do_pick (ClutterStage *stage,
gint y,
ClutterPickMode mode)
{
ClutterStagePrivate *priv;
ClutterActor *actor = CLUTTER_ACTOR (stage);
ClutterStagePrivate *priv = stage->priv;
ClutterMainContext *context;
guchar pixel[4] = { 0xff, 0xff, 0xff, 0xff };
CoglColor stage_pick_id;
gboolean dither_enabled_save;
ClutterActor *retval;
CoglFramebuffer *fb;
ClutterActor *actor;
gint dirty_x;
gint dirty_y;
gint read_x;
gint read_y;
float stage_width, stage_height;
int window_scale;
CLUTTER_STATIC_COUNTER (do_pick_counter,
@ -1468,18 +1470,20 @@ _clutter_stage_do_pick (ClutterStage *stage,
"The time spent issuing a read pixels",
0 /* no application private data */);
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
priv = stage->priv;
if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
return CLUTTER_ACTOR (stage);
return actor;
if (G_UNLIKELY (clutter_pick_debug_flags & CLUTTER_DEBUG_NOP_PICKING))
return CLUTTER_ACTOR (stage);
return actor;
if (G_UNLIKELY (priv->impl == NULL))
return CLUTTER_ACTOR (stage);
return actor;
clutter_actor_get_size (CLUTTER_ACTOR (stage), &stage_width, &stage_height);
if (x < 0 || x >= stage_width || y < 0 || y >= stage_height)
return actor;
#ifdef CLUTTER_ENABLE_PROFILE
if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY)
@ -1515,11 +1519,9 @@ _clutter_stage_do_pick (ClutterStage *stage,
CLUTTER_NOTE (PICK, "Performing pick at %i,%i", x, y);
cogl_color_init_from_4ub (&stage_pick_id, 255, 255, 255, 255);
CLUTTER_TIMER_START (_clutter_uprof_context, pick_clear);
cogl_clear (&stage_pick_id,
COGL_BUFFER_BIT_COLOR |
COGL_BUFFER_BIT_DEPTH);
cogl_color_init_from_4ub (&stage_pick_id, 255, 255, 255, 255);
cogl_clear (&stage_pick_id, COGL_BUFFER_BIT_COLOR | COGL_BUFFER_BIT_DEPTH);
CLUTTER_TIMER_STOP (_clutter_uprof_context, pick_clear);
/* Disable dithering (if any) when doing the painting in pick mode */
@ -1553,12 +1555,10 @@ _clutter_stage_do_pick (ClutterStage *stage,
{
char *file_name =
g_strconcat ("pick-buffer-",
_clutter_actor_get_debug_name (CLUTTER_ACTOR (stage)),
_clutter_actor_get_debug_name (actor),
NULL);
read_pixels_to_file (file_name, 0, 0,
clutter_actor_get_width (CLUTTER_ACTOR (stage)),
clutter_actor_get_height (CLUTTER_ACTOR (stage)));
read_pixels_to_file (file_name, 0, 0, stage_width, stage_height);
g_free (file_name);
}
@ -1572,14 +1572,12 @@ _clutter_stage_do_pick (ClutterStage *stage,
_clutter_stage_dirty_viewport (stage);
if (pixel[0] == 0xff && pixel[1] == 0xff && pixel[2] == 0xff)
{
actor = CLUTTER_ACTOR (stage);
}
retval = actor;
else
{
guint32 id_ = _clutter_pixel_to_id (pixel);
actor = _clutter_get_actor_by_id (stage, id_);
retval = _clutter_get_actor_by_id (stage, id_);
}
CLUTTER_TIMER_STOP (_clutter_uprof_context, pick_timer);
@ -1589,11 +1587,9 @@ _clutter_stage_do_pick (ClutterStage *stage,
_clutter_profile_suspend ();
#endif
return actor;
return retval;
}
static gboolean
clutter_stage_real_delete_event (ClutterStage *stage,
ClutterEvent *event)
@ -2892,6 +2888,8 @@ clutter_stage_get_actor_at_pos (ClutterStage *stage,
gint x,
gint y)
{
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
return _clutter_stage_do_pick (stage, x, y, pick_mode);
}