bugfix [#23118] Blender freezes when combing hair - OS X path changes related?

- glReadPixels() was running to get the depth on each pixel, this works fine one some cards but was locking up on OSX.
- Replace glReadPixels() call with a single call to view3d_update_depths() right after view3d_validate_backbuf(), so the depths are only read once.
- Unrelated to the changes above, but should improve performance: view3d_validate_backbuf() was being called on every redraw while combing, now only call once when combing starts.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 2b5dc3b14ff..870fd452b22 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -79,6 +79,7 @@ void window_to_3d_delta(struct ARegion *ar, float *vec, short mx, short my);
 void view3d_unproject(struct bglMats *mats, float out[3], const short x, const short y, const float z);
 
 /* Depth buffer */
+void view3d_update_depths(struct ARegion *ar);
 float read_cached_depth(struct ViewContext *vc, int x, int y);
 void request_depth_update(struct RegionView3D *rv3d);