[jak3] Fix alpha for prims, entity-table (#3609)

Fix issue where light-trail is invisible and some actors not spawning
due to out of memory.

decompiler/config/jak3/all-types.gc

@@ -25908,8 +25908,33 @@
   :flag-assert         #xe00000010
   )
 
+;; doesn't exist, but referenced by type ref in the entity table.
+(deftype sail-boat-a (process-drawable-reserved)
+  ()
+  )
+
+(deftype cty-window-a (process-drawable-reserved)
+  ()
+  )
+
+(deftype city-window-a (process-drawable-reserved)
+  ()
+  )
+
+(deftype cty-guard-turret (process-drawable-reserved)
+  ()
+  )
+
+(deftype cty-fruit-stand (process-drawable-reserved)
+  ()
+  )
+
+(deftype torn (process-drawable-reserved)
+  ()
+  )
+
 (deftype entity-info (basic)
-  ((ptype     type    :offset-assert 4) ;; guessed by decompiler
+  ((ptype     object   :offset-assert 4) ;; guessed by decompiler
    (pool      symbol  :offset-assert 8) ;; guessed by decompiler
    (heap-size int32   :offset-assert 12)
    )

game/graphics/opengl_renderer/foreground/Generic2.cpp

@@ -86,10 +86,10 @@ void Generic2::render_in_mode(DmaFollower& dma,
     auto p = prof.make_scoped_child("setup");
     switch (mode) {
       case Mode::NORMAL:
-      case Mode::PRIM:
         setup_draws(true, true);
         break;
       case Mode::LIGHTNING:
+      case Mode::PRIM:
         setup_draws(false, true);
         break;
       case Mode::WARP:

game/graphics/opengl_renderer/foreground/Generic2_Build.cpp

@@ -190,6 +190,16 @@ void Generic2::determine_draw_modes(bool enable_at, bool default_fog) {
       current_mode.set_alpha_fail(reg.afail());
       current_mode.set_zt(reg.zte());
       current_mode.set_depth_test(reg.ztest());
+
+      // detect a strange way of disabling z writes by light-trail.
+      // we don't actually handle alpha_fail later on in Direct - it doesn't map well to modern
+      // graphics and would require a draw call per primitive.
+      if (current_mode.get_alpha_fail() == GsTest::AlphaFail::FB_ONLY &&
+          current_mode.get_aref() == 0x80 &&
+          current_mode.get_alpha_test() == DrawMode::AlphaTest::GEQUAL) {
+        current_mode.set_alpha_test(DrawMode::AlphaTest::ALWAYS);
+        current_mode.disable_depth_write();
+      }
     }
 
     m_adgifs[i].mode = current_mode;

goal_src/jak3/engine/entity/entity-h.gc

@@ -192,7 +192,7 @@ that gets accessed by the accompanying process."
 (set! (-> actor-group heap-base) (the-as uint 8))
 
 (deftype entity-info (basic)
-  ((ptype      type)
+  ((ptype      object)
    (pool       symbol)
    (heap-size  int32)
    )