Separate queues for every render layer

main.c

@@ -1400,6 +1400,16 @@ void flush_quad_batch()
  cur_batch_data_index = 0;
 }
 
+typedef enum 
+{
+ LAYER_TILEMAP,
+ LAYER_WORLD,
+ LAYER_UI,
+ LAYER_UI_FG,
+
+ LAYER_LAST
+} Layer;
+
 #define Y_COORD_IN_BACK (-1.0f)
 #define Y_COORD_IN_FRONT (3.0f)
 typedef struct DrawParams
@@ -1415,11 +1425,9 @@ typedef struct DrawParams
  float alpha_clip_threshold;
 
  bool do_clipping;
-
+ Layer layer;
 } DrawParams;
 
-BUFF(DrawParams, 1024*5) rendering_queue = {0};
-
 Vec2 into_clip_space(Vec2 screen_space_point)
 {
   Vec2 zero_to_one = DivV2(screen_space_point, screen_size());
@@ -1427,6 +1435,9 @@ Vec2 into_clip_space(Vec2 screen_space_point)
   return in_clip_space;
 }
 
+typedef BUFF(DrawParams, 1024*5) RenderingQueue;
+RenderingQueue rendering_queues[LAYER_LAST] = {0};
+
 // The image region is in pixel space of the image
 void draw_quad(DrawParams d)
 {
@@ -1441,7 +1452,8 @@ void draw_quad(DrawParams d)
  // we've aplied the world space transform
  d.world_space = false;
 
- BUFF_APPEND(&rendering_queue, d);
+ assert(d.layer >= 0 && d.layer < ARRLEN(rendering_queues));
+ BUFF_APPEND(&rendering_queues[(int)d.layer], d);
 }
 
 int rendering_compare(const void *a, const void *b)
@@ -3910,9 +3922,12 @@ F cost: G + H
 
   PROFILE_SCOPE("flush rendering")
   {
-   qsort(&rendering_queue.data[0], rendering_queue.cur_index, sizeof(rendering_queue.data[0]), rendering_compare);
+   ARR_ITER(RenderingQueue, rendering_queues)
+   {
+    RenderingQueue *rendering_queue = it;
+    qsort(&rendering_queue->data[0], rendering_queue->cur_index, sizeof(rendering_queue->data[0]), rendering_compare);
 
-   BUFF_ITER(DrawParams, &rendering_queue)
+    BUFF_ITER(DrawParams, rendering_queue)
     {
      DrawParams d = *it;
      PROFILE_SCOPE("Draw quad")
@@ -4026,12 +4041,13 @@ F cost: G + H
 
      }
     }
-   BUFF_CLEAR(&rendering_queue);
+    BUFF_CLEAR(rendering_queue);
 
     flush_quad_batch();
     sg_end_pass();
     sg_commit();
    }
+  }
 
   last_frame_processing_time = stm_sec(stm_diff(stm_now(),time_start_frame));