From 575ade22d4de472ccf9e7d2dc1ffca37416c58f6 Mon Sep 17 00:00:00 2001
From: Joseph Eagar <joeedh@gmail.com>
Date: Wed, 20 Apr 2022 22:03:45 -0700
Subject: Commit D14179: Revamp Vertex Paint With C++

- Verrtex paint mode has been refactored into C++ templates.
  It now works with both byte and float colors and point
  & corner attribute domains.
- There is a new API for mixing colors (also based
  on C++ templates).  Unlike the existing APIs byte
  and float colors are interpolated identically.
  Interpolation does happen in a squared rgb space,
  this may be changed in the future.
- Vertex paint now uses the sculpt undo system.

Reviewed By: Brecht Van Lommel.

Differential Revision: https://developer.blender.org/D14179
Ref D14179
---
 source/blender/blenloader/intern/versioning_300.c | 48 +++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'source/blender/blenloader/intern/versioning_300.c')

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index ddd9405c571..a9a63e1d4b9 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -2448,6 +2448,54 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
   }
 
+  /* Rebuild active/render color attribute references. */
+  if (!MAIN_VERSION_ATLEAST(bmain, 302, 6)) {
+    LISTBASE_FOREACH (Brush *, br, &bmain->brushes) {
+      /* buggy code in wm_toolsystem broke smear in old files,
+         reset to defaults */
+      if (br->sculpt_tool == SCULPT_TOOL_SMEAR) {
+        br->alpha = 1.0f;
+        br->spacing = 5;
+        br->flag &= ~BRUSH_ALPHA_PRESSURE;
+        br->flag &= ~BRUSH_SPACE_ATTEN;
+        br->curve_preset = BRUSH_CURVE_SPHERE;
+      }
+    }
+
+    LISTBASE_FOREACH (Mesh *, me, &bmain->meshes) {
+      for (int step = 0; step < 2; step++) {
+        CustomDataLayer *actlayer = NULL;
+
+        int vact1, vact2;
+
+        if (step) {
+          vact1 = CustomData_get_render_layer_index(&me->vdata, CD_PROP_COLOR);
+          vact2 = CustomData_get_render_layer_index(&me->ldata, CD_PROP_BYTE_COLOR);
+        }
+        else {
+          vact1 = CustomData_get_active_layer_index(&me->vdata, CD_PROP_COLOR);
+          vact2 = CustomData_get_active_layer_index(&me->ldata, CD_PROP_BYTE_COLOR);
+        }
+
+        if (vact1 != -1) {
+          actlayer = me->vdata.layers + vact1;
+        }
+        else if (vact2 != -1) {
+          actlayer = me->ldata.layers + vact2;
+        }
+
+        if (actlayer) {
+          if (step) {
+            BKE_id_attributes_render_color_set(&me->id, actlayer);
+          }
+          else {
+            BKE_id_attributes_active_color_set(&me->id, actlayer);
+          }
+        }
+      }
+    }
+  }
+
   if (!MAIN_VERSION_ATLEAST(bmain, 302, 7)) {
     /* Generate 'system' liboverrides IDs.
      * NOTE: This is a fairly rough process, based on very basic heuristics. Should be enough for a
-- 
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