Refactor: Do not keep a copy of depth buffer in RegionView3D

The depth cache (located in `RegionView3D::depths`) is used for quick
and simple occlusion testing in:
- particle selection,
- "Draw Curve" operator and
- "Interactive Light Track to Cursor" operator,

However, keeping a texture buffer in cache is not a recommended practice.

For displays with high resolution like 8k this represents something
around 132MB.

Also, currently, each call to `ED_view3d_depth_override` invalidates
the depth cache. So that depth is never reused in multiple calls from
an operator (this was not the case in blender 2.79).

This commit allows to create a depth cache and release it in the same
operator. Thus, the buffer is kept in cache for a short time, freeing
up space.

No functional changes.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/space_view3d/view3d_select.c b/source/blender/editors/space_view3d/view3d_select.c
index 5bdeb2cb35f..f768d7faf63 100644
--- a/source/blender/editors/space_view3d/view3d_select.c
+++ b/source/blender/editors/space_view3d/view3d_select.c
@@ -4385,7 +4385,7 @@ static int view3d_circle_select_exec(bContext *C, wmOperator *op)
     FOREACH_OBJECT_IN_MODE_END;
   }
   else if (obact && (obact->mode & OB_MODE_PARTICLE_EDIT)) {
-    if (PE_circle_select(C, sel_op, mval, (float)radius)) {
+    if (PE_circle_select(C, wm_userdata, sel_op, mval, (float)radius)) {
       return OPERATOR_FINISHED;
     }
     return OPERATOR_CANCELLED;