add bounding box

src/main_cli.cpp

@@ -1,5 +1,10 @@
 #include <filesystem>
 #include <iostream>
+#include <vector>
+
+#include "bounding_box.h"
+#include "pack.h"
+#include "png.h"
 
 namespace fs = std::filesystem;
 
@@ -20,5 +25,25 @@ int main(int argc, const char* argv[]) {
         return 1;
     }
 
+    const std::optional<Frame> in_frame = load_png(input);
+    if (!in_frame) {
+        std::cerr << "Cannot load file " << input << "\n";
+        return 1;
+    }
+
+    int i = 2;
+    std::vector<BoundingBox> bboxes;
+    bboxes.reserve((argc - 2) / 4);
+    while (i < argc) {
+        const uint32_t x1 = atoi(argv[i]);
+        const uint32_t y1 = atoi(argv[i + 1]);
+        const uint32_t x2 = atoi(argv[i + 2]);
+        const uint32_t y2 = atoi(argv[i + 3]);
+        bboxes.push_back(BoundingBox({x1, y1, x2, y2}));
+        i += 4;
+    }
+
+    Frame regions = pack(*in_frame, bboxes);
+
     return 0;
 }