[jak2] fge=0 at the start of warp (#2740)

The warp giftags don't set PRE and seem to rely on fogging being
disabled at the start.

game/graphics/opengl_renderer/Warp.cpp

@@ -12,7 +12,7 @@ void Warp::render(DmaFollower& dma, SharedRenderState* render_state, ScopedProfi
                        render_state->render_fb_x, render_state->render_fb_y,
                        render_state->render_fb);
   render_state->texture_pool->move_existing_to_vram(m_warp_src_tex, m_tbp);
-  m_generic->render_in_mode(dma, render_state, prof, Generic2::Mode::NORMAL);
+  m_generic->render_in_mode(dma, render_state, prof, Generic2::Mode::WARP);
 }
 
 void Warp::init_textures(TexturePool& tex_pool, GameVersion version) {

game/graphics/opengl_renderer/foreground/Generic2.cpp

@@ -60,6 +60,7 @@ void Generic2::render_in_mode(DmaFollower& dma,
     auto p = prof.make_scoped_child("dma");
     switch (mode) {
       case Mode::NORMAL:
+      case Mode::WARP:
         if (render_state->version == GameVersion::Jak1) {
           process_dma_jak1(dma, render_state->next_bucket);
         } else {
@@ -80,10 +81,13 @@ void Generic2::render_in_mode(DmaFollower& dma,
     auto p = prof.make_scoped_child("setup");
     switch (mode) {
       case Mode::NORMAL:
-        setup_draws(true);
+        setup_draws(true, true);
         break;
       case Mode::LIGHTNING:
-        setup_draws(false);
+        setup_draws(false, true);
+        break;
+      case Mode::WARP:
+        setup_draws(true, false);
         break;
       default:
         ASSERT_NOT_REACHED();

game/graphics/opengl_renderer/foreground/Generic2.h

@@ -11,7 +11,7 @@ class Generic2 {
            u32 num_buckets = 800);
   ~Generic2();
 
-  enum class Mode { NORMAL, LIGHTNING };
+  enum class Mode { NORMAL, LIGHTNING, WARP };
 
   void render_in_mode(DmaFollower& dma,
                       SharedRenderState* render_state,
@@ -33,7 +33,7 @@ class Generic2 {
   static_assert(sizeof(Vertex) == 32);
 
  private:
-  void determine_draw_modes(bool enable_at);
+  void determine_draw_modes(bool enable_at, bool default_fog);
   void build_index_buffer();
   void link_adgifs_back_to_frags();
   void draws_to_buckets();
@@ -42,7 +42,7 @@ class Generic2 {
   void process_dma_jak1(DmaFollower& dma, u32 next_bucket);
   void process_dma_lightning(DmaFollower& dma, u32 next_bucket);
   void process_dma_jak2(DmaFollower& dma, u32 next_bucket);
-  void setup_draws(bool enable_at);
+  void setup_draws(bool enable_at, bool default_fog);
   void do_draws(SharedRenderState* render_state, ScopedProfilerNode& prof);
   void do_draws_for_alpha(SharedRenderState* render_state,
                           ScopedProfilerNode& prof,

game/graphics/opengl_renderer/foreground/Generic2_Build.cpp

@@ -4,14 +4,14 @@
  * Main function to set up Generic2 draw lists.
  * This function figures out which vertices belong to which draw settings.
  */
-void Generic2::setup_draws(bool enable_at) {
+void Generic2::setup_draws(bool enable_at, bool default_fog) {
   if (m_next_free_frag == 0) {
     return;
   }
   m_gs = GsState();
   link_adgifs_back_to_frags();
   process_matrices();
-  determine_draw_modes(enable_at);
+  determine_draw_modes(enable_at, default_fog);
   draws_to_buckets();
   final_vertex_update();
   build_index_buffer();
@@ -26,7 +26,7 @@ void Generic2::setup_draws(bool enable_at) {
  * settings, the tbp (texture vram address), and the "vertex flags" that need to be set for each
  * vertex.  This information is used in later steps.
  */
-void Generic2::determine_draw_modes(bool enable_at) {
+void Generic2::determine_draw_modes(bool enable_at, bool default_fog) {
   // initialize draw mode
   DrawMode current_mode;
   current_mode.set_at(enable_at);
@@ -37,7 +37,7 @@ void Generic2::determine_draw_modes(bool enable_at) {
   current_mode.set_depth_test(GsTest::ZTest::GEQUAL);
   current_mode.set_depth_write_enable(!m_drawing_config.zmsk);
   current_mode.set_alpha_blend(DrawMode::AlphaBlend::SRC_SRC_SRC_SRC);
-  m_gs.set_fog_flag(true);
+  m_gs.set_fog_flag(default_fog);
 
   u32 tbp = -1;