Fix T74254: EEVEE Render Passes Availability

When disabling AO or BLOOM in the render tab, when the pass is shown in
a 3d viewport the pass wasn't reset. This resulted in showing a black
texture and a not filled UI render pass in the shading popover.

This patch will by default reset to the combined pass. It is intended
that the render_pass in the 3d shading struct isn't set to combined as
people could have disabled AO/bloom by mistake and it could reset
viewports that aren't visible.

2 files changed, 28 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_renderpasses.c b/source/blender/draw/engines/eevee/eevee_renderpasses.c
index 2f9e8f3d555..e9dcb6376bb 100644
--- a/source/blender/draw/engines/eevee/eevee_renderpasses.c
+++ b/source/blender/draw/engines/eevee/eevee_renderpasses.c
@@ -88,7 +88,17 @@ void EEVEE_renderpasses_init(EEVEE_Data *vedata)
   View3D *v3d = draw_ctx->v3d;
 
   if (v3d) {
-    g_data->render_passes = v3d->shading.render_pass;
+    const Scene *scene = draw_ctx->scene;
+    eViewLayerEEVEEPassType render_pass = v3d->shading.render_pass;
+    if (render_pass == EEVEE_RENDER_PASS_AO &&
+        ((scene->eevee.flag & SCE_EEVEE_GTAO_ENABLED) == 0)) {
+      render_pass = EEVEE_RENDER_PASS_COMBINED;
+    }
+    else if (render_pass == EEVEE_RENDER_PASS_BLOOM &&
+             ((scene->eevee.flag & SCE_EEVEE_BLOOM_ENABLED) == 0)) {
+      render_pass = EEVEE_RENDER_PASS_COMBINED;
+    }
+    g_data->render_passes = render_pass;
   }
   else {
     eViewLayerEEVEEPassType enabled_render_passes = view_layer->eevee.render_passes;
diff --git a/source/blender/makesrna/intern/rna_space.c b/source/blender/makesrna/intern/rna_space.c
index 5fdc2a18330..762c1985fa9 100644
--- a/source/blender/makesrna/intern/rna_space.c
+++ b/source/blender/makesrna/intern/rna_space.c
@@ -1285,6 +1285,21 @@ static const EnumPropertyItem *rna_3DViewShading_render_pass_itemf(bContext *C,
   *r_free = true;
   return result;
 }
+static int rna_3DViewShading_render_pass_get(PointerRNA *ptr)
+{
+  View3DShading *shading = (View3DShading *)ptr->data;
+  eViewLayerEEVEEPassType result = shading->render_pass;
+  Scene *scene = rna_3DViewShading_scene(ptr);
+
+  if (result == EEVEE_RENDER_PASS_AO && ((scene->eevee.flag & SCE_EEVEE_GTAO_ENABLED) == 0)) {
+    result = EEVEE_RENDER_PASS_COMBINED;
+  }
+  if (result == EEVEE_RENDER_PASS_BLOOM && ((scene->eevee.flag & SCE_EEVEE_BLOOM_ENABLED) == 0)) {
+    result = EEVEE_RENDER_PASS_COMBINED;
+  }
+
+  return result;
+}
 
 static void rna_SpaceView3D_use_local_collections_update(bContext *C, PointerRNA *ptr)
 {
@@ -3381,7 +3396,8 @@ static void rna_def_space_view3d_shading(BlenderRNA *brna)
   RNA_def_property_enum_sdna(prop, NULL, "render_pass");
   RNA_def_property_enum_items(prop, rna_enum_view3dshading_render_pass_type_items);
   RNA_def_property_ui_text(prop, "Render Pass", "Render Pass to show in the viewport");
-  RNA_def_property_enum_funcs(prop, NULL, NULL, "rna_3DViewShading_render_pass_itemf");
+  RNA_def_property_enum_funcs(
+      prop, "rna_3DViewShading_render_pass_get", NULL, "rna_3DViewShading_render_pass_itemf");
   RNA_def_property_update(prop, NC_SPACE | ND_SPACE_VIEW3D, NULL);
 }