draw nodes on top of edges

Author: soheilshahrouz

vpr/src/draw/draw_mux.cpp

@@ -78,11 +78,10 @@ ezgl::rectangle draw_mux(ezgl::point2d origin, e_side orientation, float height,
  */
 void draw_mux_with_size(ezgl::point2d origin, e_side orientation, float height, int size, int transparency_factor, ezgl::renderer* g) {
     g->set_color(ezgl::YELLOW, transparency_factor);
-    auto bounds = draw_mux(origin, orientation, height, g);
+    ezgl::rectangle bounds = draw_mux(origin, orientation, height, g);
 
     g->set_color(ezgl::BLACK, transparency_factor);
-    g->draw_text(bounds.center(), std::to_string(size), bounds.width(),
-                 bounds.height());
+    g->draw_text(bounds.center(), std::to_string(size), bounds.width(), bounds.height());
 }
 
 #endif

vpr/src/draw/draw_rr.cpp

@@ -51,23 +51,32 @@ void draw_rr(ezgl::renderer* g) {
 
     g->set_line_dash(ezgl::line_dash::none);
 
+    // Node colors by types
+    // colors for Source, Sink, IPIN, OPIN, CHANX, CHANY, MUX, CHANZ
+    constexpr vtr::array<e_rr_type, ezgl::color, (size_t)e_rr_type::NUM_RR_TYPES> node_colors{DEFAULT_RR_NODE_COLOR,
+                                                                                              DEFAULT_RR_NODE_COLOR,
+                                                                                              ezgl::PURPLE,
+                                                                                              ezgl::PINK,
+                                                                                              DEFAULT_RR_NODE_COLOR,
+                                                                                              DEFAULT_RR_NODE_COLOR,
+                                                                                              DEFAULT_RR_NODE_COLOR,
+                                                                                              DEFAULT_RR_NODE_COLOR};
+
+    // Draw edges first, then nodes, so that nodes (and their muxes) are rendered on top of edges.
     for (const RRNodeId inode : device_ctx.rr_graph.nodes()) {
+        draw_rr_edges(inode, g);
+    }
 
+    for (const RRNodeId inode : device_ctx.rr_graph.nodes()) {
         e_rr_type node_type = rr_graph.node_type(inode);
         bool inter_cluster_node = is_inter_cluster_node(rr_graph, inode);
         bool node_highlighted = draw_state->draw_rr_node[inode].node_highlighted;
 
-        // Node colors by types
-        // colors for Source, Sink, IPIN, OPIN, CHANX, CHANY, MUX, CHANZ
-        constexpr vtr::array<e_rr_type, ezgl::color, (size_t)e_rr_type::NUM_RR_TYPES> node_colors{DEFAULT_RR_NODE_COLOR, DEFAULT_RR_NODE_COLOR, ezgl::PURPLE, ezgl::PINK, DEFAULT_RR_NODE_COLOR, DEFAULT_RR_NODE_COLOR, DEFAULT_RR_NODE_COLOR, DEFAULT_RR_NODE_COLOR};
-
         // Apply color to the node if it is not highlighted
         if (!node_highlighted) {
             draw_state->draw_rr_node[inode].color = node_colors.at(node_type);
         }
 
-        draw_rr_edges(inode, g);
-
         if (!node_highlighted) {
             // Draw channel nodes if enabled
             if ((node_type == e_rr_type::CHANX || node_type == e_rr_type::CHANY) && !draw_state->draw_channel_nodes) {