Cleanup: Overlay: Remove global DST access through DRW_text_cache_ensure

source/blender/draw/engines/overlay/overlay_armature.cc

@@ -1516,7 +1516,6 @@ static void draw_bone_name(const Armatures::DrawContext *ctx,
                            const UnifiedBonePtr bone,
                            const eBone_Flag boneflag)
 {
-  DRWTextStore *dt = DRW_text_cache_ensure();
   uchar color[4];
   float vec[3];
 
@@ -1538,7 +1537,7 @@ static void draw_bone_name(const Armatures::DrawContext *ctx,
   mid_v3_v3v3(vec, head, tail);
   mul_m4_v3(ctx->ob->object_to_world().ptr(), vec);
 
-  DRW_text_cache_add(dt,
+  DRW_text_cache_add(ctx->dt,
                      vec,
                      is_pose ? pchan->name : eBone->name,
                      is_pose ? strlen(pchan->name) : strlen(eBone->name),

source/blender/draw/engines/overlay/overlay_next_armature.hh

@@ -444,6 +444,7 @@ class Armatures : Overlay {
 
     Armatures::BoneBuffers *bone_buf = nullptr;
     Resources *res = nullptr;
+    DRWTextStore *dt = nullptr;
 
     /* Not a theme, this is an override. */
     const float *const_color = nullptr;
@@ -474,6 +475,7 @@ class Armatures : Overlay {
     ctx.ob = ob_ref.object;
     ctx.ob_ref = &ob_ref;
     ctx.res = &res;
+    ctx.dt = state.dt;
     ctx.draw_mode = draw_mode;
     ctx.drawtype = eArmature_Drawtype(arm->drawtype);
 

source/blender/draw/engines/overlay/overlay_next_camera.hh

@@ -513,9 +513,7 @@ class Cameras : Overlay {
         }
 
         if ((v3d->flag2 & V3D_SHOW_BUNDLENAME) && !is_selection) {
-          DRWTextStore *dt = DRW_text_cache_ensure();
-
-          DRW_text_cache_add(dt,
+          DRW_text_cache_add(state.dt,
                              bundle_mat[3],
                              track->name,
                              strlen(track->name),