From 285a68b7bbf2fa40e41d507991467387f5dd5264 Mon Sep 17 00:00:00 2001
From: Joseph Eagar <joeedh@gmail.com>
Date: Wed, 8 Jun 2022 12:30:01 -0700
Subject: Sculpt: PBVH Draw Support for EEVEE
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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
---
 source/blender/gpu/GPU_buffers.h | 44 ++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 13 deletions(-)

(limited to 'source/blender/gpu/GPU_buffers.h')

diff --git a/source/blender/gpu/GPU_buffers.h b/source/blender/gpu/GPU_buffers.h
index e4a01670558..5d33ea71fe7 100644
--- a/source/blender/gpu/GPU_buffers.h
+++ b/source/blender/gpu/GPU_buffers.h
@@ -10,6 +10,7 @@
 #include <stddef.h>
 
 #include "BKE_attribute.h"
+#include "BKE_pbvh.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -20,6 +21,7 @@ struct CCGElem;
 struct CCGKey;
 struct DMFlagMat;
 struct GSet;
+struct TableGSet;
 struct MLoop;
 struct MLoopCol;
 struct MLoopTri;
@@ -29,6 +31,9 @@ struct MVert;
 struct Mesh;
 struct PBVH;
 struct SubdivCCG;
+struct CustomData;
+
+typedef struct PBVHGPUFormat PBVHGPUFormat;
 
 /**
  * Buffers for drawing from PBVH grids.
@@ -78,36 +83,46 @@ enum {
 };
 
 /**
+ * Creates a vertex buffer (coordinate, normal, color) and,
+ * if smooth shading, an element index buffer.
  * Threaded: do not call any functions that use OpenGL calls!
  */
-void GPU_pbvh_mesh_buffers_update(GPU_PBVH_Buffers *buffers,
+void GPU_pbvh_mesh_buffers_update(PBVHGPUFormat *vbo_id,
+                                  GPU_PBVH_Buffers *buffers,
                                   const struct MVert *mvert,
-                                  const float (*vert_normals)[3],
+                                  const CustomData *vdata,
+                                  const CustomData *ldata,
                                   const float *vmask,
-                                  const void *vcol_data,
-                                  int vcol_type,
-                                  eAttrDomain vcol_domain,
                                   const int *sculpt_face_sets,
-                                  int face_sets_color_seed,
-                                  int face_sets_color_default,
-                                  int update_flags);
+                                  const int face_sets_color_seed,
+                                  const int face_sets_color_default,
+                                  const int update_flags,
+                                  const float (*vert_normals)[3]);
+
+bool GPU_pbvh_attribute_names_update(PBVHType pbvh_type,
+                                     PBVHGPUFormat *vbo_id,
+                                     const struct CustomData *vdata,
+                                     const struct CustomData *ldata,
+                                     bool active_attrs_only);
 
 /**
  * Creates a vertex buffer (coordinate, normal, color) and,
  * if smooth shading, an element index buffer.
  * Threaded: do not call any functions that use OpenGL calls!
  */
-void GPU_pbvh_bmesh_buffers_update(GPU_PBVH_Buffers *buffers,
+void GPU_pbvh_bmesh_buffers_update(PBVHGPUFormat *vbo_id,
+                                   struct GPU_PBVH_Buffers *buffers,
                                    struct BMesh *bm,
                                    struct GSet *bm_faces,
                                    struct GSet *bm_unique_verts,
                                    struct GSet *bm_other_verts,
-                                   int update_flags);
+                                   const int update_flags);
 
 /**
  * Threaded: do not call any functions that use OpenGL calls!
  */
-void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
+void GPU_pbvh_grid_buffers_update(PBVHGPUFormat *vbo_id,
+                                  GPU_PBVH_Buffers *buffers,
                                   struct SubdivCCG *subdiv_ccg,
                                   struct CCGElem **grids,
                                   const struct DMFlagMat *grid_flag_mats,
@@ -120,7 +135,8 @@ void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
                                   int update_flags);
 
 /**
- * Finish update. Not thread safe, must run in OpenGL main thread.
+ * Finish update. Not thread safe, must run in OpenGL main
+ * thread.
  */
 void GPU_pbvh_buffers_update_flush(GPU_PBVH_Buffers *buffers);
 
@@ -133,9 +149,11 @@ void GPU_pbvh_buffers_free(GPU_PBVH_Buffers *buffers);
 struct GPUBatch *GPU_pbvh_buffers_batch_get(GPU_PBVH_Buffers *buffers, bool fast, bool wires);
 
 short GPU_pbvh_buffers_material_index_get(GPU_PBVH_Buffers *buffers);
-
 bool GPU_pbvh_buffers_has_overlays(GPU_PBVH_Buffers *buffers);
 
+PBVHGPUFormat *GPU_pbvh_make_format();
+void GPU_pbvh_free_format(PBVHGPUFormat *vbo_id);
+
 #ifdef __cplusplus
 }
 #endif
-- 
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