From 829c6a7b98286dfdcc71d784a613ea708797e569 Mon Sep 17 00:00:00 2001
From: Pablo Vazquez <pablo@blender.org>
Date: Fri, 17 Oct 2025 18:50:29 +0200
Subject: [PATCH] Fix #141889: Broken themes in 5.0

Blender 5.0 got a theme overhaul, removing hundreds of options and
adding some more. While versioning was attempted to keep themes
looking as close as possible, some settings are impossible to guess
so they require manual editing.

Reset the theme to the default. Similarly to how it was done in other
major overhauls (2.80, 3.0).

Documentation and tools to migrate themes will be available at:
https://developer.blender.org/docs/release_notes/5.0/user_interface/

Pull Request: https://projects.blender.org/blender/blender/pulls/147637
---
 .../datafiles/userdef/userdef_default_theme.c | 18 ++++++++---------
 .../blender/blenkernel/BKE_blender_version.h  |  2 +-
 .../blenloader/intern/versioning_userdef.cc   | 20 +++++++++++++++++++
 3 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/release/datafiles/userdef/userdef_default_theme.c b/release/datafiles/userdef/userdef_default_theme.c
index f8d3020bcea..fcd9e57c465 100644
--- a/release/datafiles/userdef/userdef_default_theme.c
+++ b/release/datafiles/userdef/userdef_default_theme.c
@@ -289,7 +289,7 @@ const bTheme U_theme_default = {
   },
   .regions = {
     .asset_shelf = {
-      .back = RGBA(0x303030ff),
+      .back = RGBA(0x303030e6),
       .header_back = RGBA(0x1d1d1dff),
     },
     .channels = {
@@ -298,10 +298,10 @@ const bTheme U_theme_default = {
       .text_selected = RGBA(0xffaf23ff),
     },
     .scrubbing = {
-      .back = RGBA(0x161616ff),
-      .text = RGBA(0xc3c3c3ff),
-      .time_marker = RGBA(0xffffff4d),
-      .time_marker_selected = RGBA(0xffffffb3),
+      .back = RGBA(0x1d1d1dff),
+      .text = RGBA(0x808080ff),
+      .time_marker = RGBA(0xffffff80),
+      .time_marker_selected = RGBA(0xffffffff),
     },
     .sidebars = {
       .back = RGBA(0x30303000),
@@ -312,7 +312,6 @@ const bTheme U_theme_default = {
     .anim = {
       .playhead = RGBA(0x4772b3ff),
       .preview_range = RGBA(0xa14d0066),
-      .scene_strip_range = RGBA(0x00000080),
       .channels = RGBA(0x194e8080),
       .channels_sub = RGBA(0x0f2c4d80),
       .channel_group = RGBA(0x1a332d37),
@@ -333,6 +332,7 @@ const bTheme U_theme_default = {
       .keyframe_generated_selected = RGBA(0xa28962ff),
       .long_key = RGBA(0xffffff1f),
       .long_key_selected = RGBA(0xff8c0099),
+      .scene_strip_range = RGBA(0x00000080),
     },
     .curves = {
       .handle_free = RGBA(0x745900ff),
@@ -646,15 +646,15 @@ const bTheme U_theme_default = {
     .row_alternate = RGBA(0xffffff04),
   },
   .space_node = {
-    .back = RGBA(0x1d1d1d00),
+    .back = RGBA(0x1a1a1a00),
     .title = RGBA(0xeeeeeeff),
     .text = RGBA(0xe6e6e6ff),
     .text_hi = RGBA(0xffffffff),
-    .header = RGBA(0x1d1d1db3),
+    .header = RGBA(0x1a1a1ab3),
     .header_text = RGBA(0xeeeeeeff),
     .header_text_hi = RGBA(0xffffffff),
     .shade2 = RGBA(0x7f7f7f64),
-    .grid = RGBA(0x28282800),
+    .grid = RGBA(0x30303000),
     .wire = RGBA(0x1a1a1aff),
     .select = RGBA(0xed5700ff),
     .active = RGBA(0xffffffff),
diff --git a/source/blender/blenkernel/BKE_blender_version.h b/source/blender/blenkernel/BKE_blender_version.h
index 1a2cab248ac..f3af57fb18f 100644
--- a/source/blender/blenkernel/BKE_blender_version.h
+++ b/source/blender/blenkernel/BKE_blender_version.h
@@ -27,7 +27,7 @@
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 110
+#define BLENDER_FILE_SUBVERSION 111
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and cancel loading the file, showing a warning to
diff --git a/source/blender/blenloader/intern/versioning_userdef.cc b/source/blender/blenloader/intern/versioning_userdef.cc
index c0bd67798ac..bad0080393d 100644
--- a/source/blender/blenloader/intern/versioning_userdef.cc
+++ b/source/blender/blenloader/intern/versioning_userdef.cc
@@ -390,6 +390,26 @@ static void do_versions_theme(const UserDef *userdef, bTheme *btheme)
     FROM_DEFAULT_V4_UCHAR(common.anim.scene_strip_range);
   }
 
+  /* Reset the theme due to compatibility breaking changes in 5.0. */
+  if (!USER_VERSION_ATLEAST(500, 111)) {
+    MEMCPY_STRUCT_AFTER(btheme, &U_theme_default, name);
+    /* Update text styles to match. */
+    LISTBASE_FOREACH (uiStyle *, style, &userdef->uistyles) {
+      style->paneltitle.points = 11.0f;
+      style->paneltitle.shadow = 3;
+      style->paneltitle.shadowalpha = 0.5f;
+      style->paneltitle.shadowcolor = 0.0f;
+      style->widget.points = 11.0f;
+      style->widget.shadow = 1;
+      style->widget.shadowalpha = 0.5f;
+      style->widget.shadowcolor = 0.0f;
+      style->tooltip.shadow = 1;
+      style->tooltip.points = 11.0f;
+      style->tooltip.shadowalpha = 0.5f;
+      style->tooltip.shadowcolor = 0.0f;
+    }
+  }
+
   /**
    * Always bump subversion in BKE_blender_version.h when adding versioning
    * code here, and wrap it inside a USER_VERSION_ATLEAST check.