fix [#33501] Grease pencil in OpenGL render

With the view3d 'Render Only' option, grease pencil wouldn't draw, but for OpenGL render it did.

Since grease pencil can be very useful in opengl renders, enable grease pencil drawing with 'Render Only' option in the viewport,
and add a checkbox in the grease pencil header not to draw (unchecking each layer is annoying and applies to all spaces).

1 files changed, 44 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index cf4deb7213d..0d40ad9d4cd 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -8365,6 +8365,50 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		}
 	}
 
+	if (main->versionfile < 265 || (main->versionfile == 265 && main->subversionfile < 3)) {
+		bScreen *sc;
+		for (sc = main->screen.first; sc; sc = sc->id.next) {
+			ScrArea *sa;
+			for (sa = sc->areabase.first; sa; sa = sa->next) {
+				SpaceLink *sl;
+				for (sl = sa->spacedata.first; sl; sl = sl->next) {
+					switch (sl->spacetype) {
+						case SPACE_VIEW3D:
+						{
+							View3D *v3d = (View3D *)sl;
+							v3d->flag2 |= V3D_SHOW_GPENCIL;
+							break;
+						}
+						case SPACE_SEQ:
+						{
+							SpaceSeq *sseq = (SpaceSeq *)sl;
+							sseq->flag |= SEQ_SHOW_GPENCIL;
+							break;
+						}
+						case SPACE_IMAGE:
+						{
+							SpaceImage *sima = (SpaceImage *)sl;
+							sima->flag |= SI_SHOW_GPENCIL;
+							break;
+						}
+						case SPACE_NODE:
+						{
+							SpaceNode *snode = (SpaceNode *)sl;
+							snode->flag |= SNODE_SHOW_GPENCIL;
+							break;
+						}
+						case SPACE_CLIP:
+						{
+							SpaceClip *sclip = (SpaceClip *)sl;
+							sclip->flag |= SC_SHOW_GPENCIL;
+							break;
+						}
+					}
+				}
+			}
+		}
+	}
+
 	/* WATCH IT!!!: pointers from libdata have not been converted yet here! */
 	/* WATCH IT 2!: Userdef struct init has to be in editors/interface/resources.c! */