Add a border and save an outline image

node_board/main.cpp

@@ -17,7 +17,8 @@ public:
       min_cut_thickness_(min_cut_thickness), width_px_(to_px(width_)), height_px_(to_px(height_)),
       min_cut_thickness_px_(to_px(min_cut_thickness_))
     {
-        png_writer_.allocate(width_px_, height_px_);
+        png_writer_.allocate(width_px_ + 4 * min_cut_thickness_px_,
+                             height_px_ + 4 * min_cut_thickness_px_);
         png_writer_.set_all_pixels_black();
     }
 
@@ -26,7 +27,9 @@ public:
     }
 
     void set_pixel(int32_t x, int32_t y, uint8_t value = 255) {
-        png_writer_.set_pixel(x, height_px_ - y - 1, value);
+        png_writer_.set_pixel(2 * min_cut_thickness_px_ + x,
+                              2 * min_cut_thickness_px_ + height_px_ - y - 1,
+                              value);
     }
 
     void draw_int_rectangle(
@@ -64,6 +67,12 @@ public:
         png_writer_.write(filename);
     }
 
+    void save_outline(char const* filename) {
+        png_writer_.set_all_pixels_black();
+        draw_int_rectangle(0, width_px_, 0, height_px_);
+        save(filename);
+    }
+
 public:
     PngWriter png_writer_;
     double width_;
@@ -157,7 +166,8 @@ int main() {
     board.draw_rectangle(vcc_pad_x_min,
                          width,
                          0,
-                         cable_pad_height - min_cut_thickness - min_trace_thickness);
+                         // Note the fudge factor... It makes mods happy.
+                         cable_pad_height - min_cut_thickness - min_trace_thickness - 0.025);
     board.draw_rectangle(width - min_trace_thickness, width, 0, height);
     board.draw_rectangle(vcc_pad_x_min,
                          width,
@@ -174,6 +184,7 @@ int main() {
                          soic_top_y);
 
     board.save("node_board_traces.png");
+    board.save_outline("node_board_outline.png");
 
     return 0;
 }