Fix T70807: Weight Paint Overlay XRay

Weight paint overlay was not working when XRay was turned on.

The Weight Paint overlay is rendered directly into the default
framebuffer with a depth equal test. This test fails as the depth won't match.
This patch will update the depth buffer in these cases.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D7176

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/draw/engines/overlay/overlay_private.h b/source/blender/draw/engines/overlay/overlay_private.h
index 47c52c885b2..7cc83c76857 100644
--- a/source/blender/draw/engines/overlay/overlay_private.h
+++ b/source/blender/draw/engines/overlay/overlay_private.h
@@ -93,6 +93,7 @@ typedef struct OVERLAY_PassList {
   DRWPass *outlines_detect_ps;
   DRWPass *outlines_resolve_ps;
   DRWPass *paint_color_ps;
+  DRWPass *paint_depth_ps;
   DRWPass *paint_overlay_ps;
   DRWPass *particle_ps;
   DRWPass *pointcloud_ps;
@@ -245,6 +246,7 @@ typedef struct OVERLAY_PrivateData {
   DRWShadingGroup *motion_path_points_grp;
   DRWShadingGroup *outlines_grp;
   DRWShadingGroup *outlines_gpencil_grp;
+  DRWShadingGroup *paint_depth_grp;
   DRWShadingGroup *paint_surf_grp;
   DRWShadingGroup *paint_wire_grp;
   DRWShadingGroup *paint_wire_selected_grp;
@@ -318,6 +320,7 @@ typedef struct OVERLAY_PrivateData {
   } armature;
   struct {
     bool in_front;
+    bool alpha_blending;
   } painting;
   struct {
     DRWCallBuffer *handle[2];