Sculpt: PBVH Draw Support for EEVEE

This patch adds support for PBVH drawing in EEVEE.

Notes:
  # PBVH_FACES only.  For Multires we'll need an API to get/cache attributes.  DynTopo support will be merged in later with sculpt-dev's DynTopo implementation.
  # Supports vertex color and UV attributes only; other types can be added fairly easily though.
  # Workbench only sends the active vertex color and UV layers to the GPU.
  # Added a new draw engine API method, DRW_cdlayer_attr_aliases_add.  Please review.
  # The vertex format object is now stored in the pbvh.

Reviewed By: Clément Foucault & Brecht Van Lommel & Jeroen Bakker
Differential Revision: https://developer.blender.org/D13897
Ref D13897

1 files changed, 9 insertions, 0 deletions

diff --git a/source/blender/draw/DRW_engine.h b/source/blender/draw/DRW_engine.h
index 00822946fe5..5b3d262ac66 100644
--- a/source/blender/draw/DRW_engine.h
+++ b/source/blender/draw/DRW_engine.h
@@ -23,6 +23,9 @@ struct DrawEngineType;
 struct GHash;
 struct GPUMaterial;
 struct GPUOffScreen;
+struct GPUVertFormat;
+struct CustomDataLayer;
+struct CustomData;
 struct GPUViewport;
 struct ID;
 struct Main;
@@ -218,6 +221,12 @@ void DRW_opengl_context_activate(bool drw_state);
  */
 void DRW_draw_cursor_2d_ex(const struct ARegion *region, const float cursor[2]);
 
+void DRW_cdlayer_attr_aliases_add(struct GPUVertFormat *format,
+                                  char *base_name,
+                                  const struct CustomData *data,
+                                  const struct CustomDataLayer *cl,
+                                  bool is_active_render,
+                                  bool is_active_layer);
 #ifdef __cplusplus
 }
 #endif