UV: support changing the opacity of the UV overlay

Add this option as it's useful to adjust how much UV's
cover the image when UV mapping.

D5348 by @EitanSomething with edits

4 files changed, 66 insertions, 0 deletions

diff --git a/source/blender/blenloader/CMakeLists.txt b/source/blender/blenloader/CMakeLists.txt
index 450d3fc2371..1555b9231ed 100644
--- a/source/blender/blenloader/CMakeLists.txt
+++ b/source/blender/blenloader/CMakeLists.txt
@@ -53,6 +53,7 @@ set(SRC
   intern/versioning_260.c
   intern/versioning_270.c
   intern/versioning_280.c
+  intern/versioning_290.c
   intern/versioning_cycles.c
   intern/versioning_defaults.c
   intern/versioning_dna.c
diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 9ff5ab3a648..cf68caebc65 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -9911,6 +9911,7 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
   blo_do_versions_260(fd, lib, main);
   blo_do_versions_270(fd, lib, main);
   blo_do_versions_280(fd, lib, main);
+  blo_do_versions_290(fd, lib, main);
   blo_do_versions_cycles(fd, lib, main);
 
   /* WATCH IT!!!: pointers from libdata have not been converted yet here! */
diff --git a/source/blender/blenloader/intern/readfile.h b/source/blender/blenloader/intern/readfile.h
index 80f8bfc3f07..55abbe703de 100644
--- a/source/blender/blenloader/intern/readfile.h
+++ b/source/blender/blenloader/intern/readfile.h
@@ -199,6 +199,7 @@ void blo_do_versions_250(struct FileData *fd, struct Library *lib, struct Main *
 void blo_do_versions_260(struct FileData *fd, struct Library *lib, struct Main *bmain);
 void blo_do_versions_270(struct FileData *fd, struct Library *lib, struct Main *bmain);
 void blo_do_versions_280(struct FileData *fd, struct Library *lib, struct Main *bmain);
+void blo_do_versions_290(struct FileData *fd, struct Library *lib, struct Main *bmain);
 void blo_do_versions_cycles(struct FileData *fd, struct Library *lib, struct Main *bmain);
 
 void do_versions_after_linking_250(struct Main *bmain);
diff --git a/source/blender/blenloader/intern/versioning_290.c b/source/blender/blenloader/intern/versioning_290.c
new file mode 100644
index 00000000000..c6adbb5c7d2
--- /dev/null
+++ b/source/blender/blenloader/intern/versioning_290.c
@@ -0,0 +1,63 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup blenloader
+ */
+/* allow readfile to use deprecated functionality */
+#define DNA_DEPRECATED_ALLOW
+
+#include "BLI_listbase.h"
+#include "BLI_utildefines.h"
+
+#include "DNA_screen_types.h"
+
+#include "BKE_collection.h"
+#include "BKE_main.h"
+
+#include "BLO_readfile.h"
+#include "readfile.h"
+
+/* Make preferences read-only, use versioning_userdef.c. */
+#define U (*((const UserDef *)&U))
+
+void blo_do_versions_290(FileData *fd, Library *UNUSED(lib), Main *bmain)
+{
+  UNUSED_VARS(fd);
+  /**
+   * Versioning code until next subversion bump goes here.
+   *
+   * \note Be sure to check when bumping the version:
+   * - "versioning_userdef.c", #BLO_version_defaults_userpref_blend
+   * - "versioning_userdef.c", #do_versions_theme
+   *
+   * \note Keep this message at the bottom of the function.
+   */
+  {
+    /* Keep this block, even when empty. */
+
+    for (bScreen *screen = bmain->screens.first; screen; screen = screen->id.next) {
+      LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
+        LISTBASE_FOREACH (SpaceLink *, sl, &area->spacedata) {
+          if (sl->spacetype == SPACE_IMAGE) {
+            SpaceImage *sima = (SpaceImage *)sl;
+            sima->uv_opacity = 1.0f;
+          }
+        }
+      }
+    }
+  }
+}