Cleanup: Remove DRWCallType

This simplify the rendering logic.

3 files changed, 36 insertions, 62 deletions

diff --git a/source/blender/draw/intern/draw_manager.h b/source/blender/draw/intern/draw_manager.h
index 8dff65175ec..b814000673d 100644
--- a/source/blender/draw/intern/draw_manager.h
+++ b/source/blender/draw/intern/draw_manager.h
@@ -124,40 +124,15 @@ typedef struct DRWCallState {
   float ob_random;
 } DRWCallState;
 
-typedef enum {
-  /** A single batch. */
-  DRW_CALL_SINGLE,
-  /** Like single but only draw a range of vertices/indices. */
-  DRW_CALL_RANGE,
-  /** Draw instances without any instancing attributes. */
-  DRW_CALL_INSTANCES,
-  /** Generate a drawcall without any #GPUBatch. */
-  DRW_CALL_PROCEDURAL,
-} DRWCallType;
-
 typedef struct DRWCall {
   struct DRWCall *next;
   DRWCallState *state;
 
-  union {
-    struct { /* type == DRW_CALL_SINGLE */
-      GPUBatch *geometry;
-    } single;
-    struct { /* type == DRW_CALL_RANGE */
-      GPUBatch *geometry;
-      uint start, count;
-    } range;
-    struct { /* type == DRW_CALL_INSTANCES */
-      GPUBatch *geometry;
-      uint count;
-    } instances;
-    struct { /* type == DRW_CALL_PROCEDURAL */
-      GPUBatch *geometry;
-      uint vert_count;
-    } procedural;
-  };
+  GPUBatch *batch;
+  uint vert_first;
+  uint vert_count;
+  uint inst_count;
 
-  DRWCallType type;
 #ifdef USE_GPU_SELECT
   int select_id;
 #endif
@@ -198,9 +173,11 @@ struct DRWUniform {
 
 typedef enum {
   DRW_SHG_NORMAL,
+
   DRW_SHG_POINT_BATCH,
   DRW_SHG_LINE_BATCH,
   DRW_SHG_TRIANGLE_BATCH,
+
   DRW_SHG_INSTANCE,
   DRW_SHG_INSTANCE_EXTERNAL,
   DRW_SHG_FEEDBACK_TRANSFORM,
diff --git a/source/blender/draw/intern/draw_manager_data.c b/source/blender/draw/intern/draw_manager_data.c
index 480802e0748..3a10543c8ef 100644
--- a/source/blender/draw/intern/draw_manager_data.c
+++ b/source/blender/draw/intern/draw_manager_data.c
@@ -459,8 +459,10 @@ void DRW_shgroup_call_add(DRWShadingGroup *shgroup, GPUBatch *geom, float (*obma
   BLI_LINKS_APPEND(&shgroup->calls, call);
 
   call->state = drw_call_state_create(shgroup, obmat, NULL);
-  call->type = DRW_CALL_SINGLE;
-  call->single.geometry = geom;
+  call->batch = geom;
+  call->vert_first = 0;
+  call->vert_count = 0; /* Auto from batch. */
+  call->inst_count = 0;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
@@ -477,10 +479,10 @@ void DRW_shgroup_call_range_add(
   BLI_LINKS_APPEND(&shgroup->calls, call);
 
   call->state = drw_call_state_create(shgroup, obmat, NULL);
-  call->type = DRW_CALL_RANGE;
-  call->range.geometry = geom;
-  call->range.start = v_sta;
-  call->range.count = v_count;
+  call->batch = geom;
+  call->vert_first = v_sta;
+  call->vert_count = v_count;
+  call->inst_count = 0;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
@@ -497,9 +499,10 @@ static void drw_shgroup_call_procedural_add_ex(DRWShadingGroup *shgroup,
   BLI_LINKS_APPEND(&shgroup->calls, call);
 
   call->state = drw_call_state_object(shgroup, obmat, NULL);
-  call->type = DRW_CALL_PROCEDURAL;
-  call->procedural.geometry = geom;
-  call->procedural.vert_count = vert_count;
+  call->batch = geom;
+  call->vert_first = 0;
+  call->vert_count = vert_count;
+  call->inst_count = 0;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
@@ -544,8 +547,10 @@ void DRW_shgroup_call_object_add_ex(DRWShadingGroup *shgroup,
   call->state = drw_call_state_object(shgroup, ob->obmat, ob);
   /* NOTE this will disable culling for the whole object. */
   call->state->flag |= (bypass_culling) ? DRW_CALL_BYPASS_CULLING : 0;
-  call->type = DRW_CALL_SINGLE;
-  call->single.geometry = geom;
+  call->batch = geom;
+  call->vert_first = 0;
+  call->vert_count = 0; /* Auto from batch. */
+  call->inst_count = 0;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
@@ -566,8 +571,10 @@ void DRW_shgroup_call_object_add_with_callback(DRWShadingGroup *shgroup,
   call->state = drw_call_state_object(shgroup, ob->obmat, ob);
   call->state->visibility_cb = callback;
   call->state->user_data = user_data;
-  call->type = DRW_CALL_SINGLE;
-  call->single.geometry = geom;
+  call->batch = geom;
+  call->vert_first = 0;
+  call->vert_count = 0; /* Auto from batch. */
+  call->inst_count = 0;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
@@ -585,9 +592,10 @@ void DRW_shgroup_call_instances_add(DRWShadingGroup *shgroup,
   BLI_LINKS_APPEND(&shgroup->calls, call);
 
   call->state = drw_call_state_create(shgroup, obmat, NULL);
-  call->type = DRW_CALL_INSTANCES;
-  call->instances.geometry = geom;
-  call->instances.count = count;
+  call->batch = geom;
+  call->vert_first = 0;
+  call->vert_count = 0; /* Auto from batch. */
+  call->inst_count = count;
 #ifdef USE_GPU_SELECT
   call->select_id = DST.select_id;
 #endif
diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c
index b9d49df7947..0a4df550044 100644
--- a/source/blender/draw/intern/draw_manager_exec.c
+++ b/source/blender/draw/intern/draw_manager_exec.c
@@ -1265,23 +1265,12 @@ static void draw_shgroup(DRWShadingGroup *shgroup, DRWState pass_state)
       GPU_SELECT_LOAD_IF_PICKSEL_CALL(call);
       draw_geometry_prepare(shgroup, call);
 
-      switch (call->type) {
-        case DRW_CALL_SINGLE:
-          draw_geometry_execute(shgroup, call->single.geometry, 0, 0, false);
-          break;
-        case DRW_CALL_RANGE:
-          draw_geometry_execute(
-              shgroup, call->range.geometry, call->range.start, call->range.count, false);
-          break;
-        case DRW_CALL_INSTANCES:
-          draw_geometry_execute(shgroup, call->instances.geometry, 0, call->instances.count, true);
-          break;
-        case DRW_CALL_PROCEDURAL:
-          draw_geometry_execute(
-              shgroup, call->procedural.geometry, 0, call->procedural.vert_count, false);
-          break;
-        default:
-          BLI_assert(0);
+      /* TODO revisit when DRW_SHG_INSTANCE and the like is gone. */
+      if (call->inst_count == 0) {
+        draw_geometry_execute(shgroup, call->batch, call->vert_first, call->vert_count, false);
+      }
+      else {
+        draw_geometry_execute(shgroup, call->batch, 0, call->inst_count, true);
       }
     }
     /* Reset state */