Cleanup/Refactor: Unify functions that redraw the depth buffer

Now `ED_view3d_backbuf_depth_validate`, `ED_view3d_draw_depth` and
`ED_view3d_draw_depth_gpencil` are unified in `ED_view3d_depth_override`.

This new function replaces `ED_view3d_autodist_init`.

Also, since `ED_view3d_depth_update` depends on the render context, and
changing the context is a slow operation, that function also was removed,
and the depth buffer cached is now updated inside the new unified drawing
function when the "bool update_cache" parameter is true.

Finally `V3D_INVALID_BACKBUF` flag has been renamed and moved to
`runtime.flag`.

Differential revision: https://developer.blender.org/D10678

1 files changed, 2 insertions, 3 deletions

diff --git a/source/blender/editors/space_view3d/view3d_edit.c b/source/blender/editors/space_view3d/view3d_edit.c
index dc590833368..5f3d71cc190 100644
--- a/source/blender/editors/space_view3d/view3d_edit.c
+++ b/source/blender/editors/space_view3d/view3d_edit.c
@@ -3628,9 +3628,8 @@ static int view3d_zoom_border_exec(bContext *C, wmOperator *op)
 
   ED_view3d_dist_range_get(v3d, dist_range);
 
-  /* Get Z Depths, needed for perspective, nice for ortho */
-  ED_view3d_draw_depth(CTX_data_ensure_evaluated_depsgraph(C), region, v3d, true);
-
+  ED_view3d_depth_override(
+      CTX_data_ensure_evaluated_depsgraph(C), region, v3d, NULL, V3D_DEPTH_NO_GPENCIL, false);
   {
     /* avoid allocating the whole depth buffer */
     ViewDepths depth_temp = {0};