bugfix

Author: cloudwu

luabgfx.c

@@ -2898,7 +2898,7 @@ next_vb_handle(lua_State *L, int stream, struct vertexbuffer *vb) {
 		break;
 	case LUA_TUSERDATA:
 		vb->handle = 0;
-		vb->tb = luaL_checkudata(L, 1, "BGFX_TB");
+		vb->tb = luaL_checkudata(L, -1, "BGFX_TB");
 		break;
 	default:
 		luaL_error(L, "Invalid vertex buffer");
@@ -2952,15 +2952,16 @@ ENCODER_API(lsetVertexBuffer) {
 				vb.handle = luaL_optinteger(L, lua_base, BGFX_HANDLE_VERTEX_BUFFER | UINT16_MAX);
 				vb.tb = NULL;
 			}
-			start = luaL_optinteger(L, lua_base + 1, 0);
-			numv = luaL_optinteger(L, lua_base + 2, UINT32_MAX);
-			layout = lua_isnoneornil(L, lua_base + 3) ? NULL : (struct vertex_layout *)lua_touserdata(L, lua_base + 3);
 		}
+
+		start = luaL_optinteger(L, lua_base + 1, 0);
+		numv = luaL_optinteger(L, lua_base + 2, UINT32_MAX);
+		layout = lua_isnoneornil(L, lua_base + 3) ? NULL : (struct vertex_layout *)lua_touserdata(L, lua_base + 3);
 	}
 
 	do {
 		if (vb.tb) {
-			BGFX(set_transient_vertex_buffer)(stream, &vb.tb->tvb, start, numv);
+			BGFX_ENCODER(set_transient_vertex_buffer, encoder, stream, &vb.tb->tvb, start, numv);
 		} else {
 			int idtype = vb.handle >> 16;
 			int idx = vb.handle & 0xffff;
@@ -3015,7 +3016,7 @@ ENCODER_API(lsetIndexBuffer) {
 			BGFX_ENCODER(set_dynamic_index_buffer, encoder, handle, start, end);
 		}
 	} else {
-		BGFX(set_transient_index_buffer)(&tb->tib, start, end);
+		BGFX_ENCODER(set_transient_index_buffer, encoder, &tb->tib, start, end);
 	}
 
 	return 0;