Add draw_rect

src/mapper/map_func.cc

@@ -1,6 +1,8 @@
 #include "mapper/map_func.h"
 
+#include "memory.h"
 #include "proto.h"
+#include "svga.h"
 #include "window_manager.h"
 
 namespace fallout {
@@ -20,6 +22,30 @@ void copy_proto_lists()
     // TODO: Incomplete.
 }
 
+// 0x4842D4
+void draw_rect(Rect* rect, unsigned char color)
+{
+    int width = rect->right - rect->left;
+    int height = rect->bottom - rect->top;
+    int max_dimension;
+
+    if (height < width) {
+        max_dimension = width;
+    } else {
+        max_dimension = height;
+    }
+
+    unsigned char* buffer = (unsigned char*)internal_malloc(max_dimension);
+    if (buffer != NULL) {
+        memset(buffer, color, max_dimension);
+        _scr_blit(buffer, width, 1, 0, 0, width, 1, rect->left, rect->top);
+        _scr_blit(buffer, 1, height, 0, 0, 1, height, rect->left, rect->top);
+        _scr_blit(buffer, width, 1, 0, 0, width, 1, rect->left, rect->bottom);
+        _scr_blit(buffer, 1, height, 0, 0, 1, height, rect->right, rect->top);
+        internal_free(buffer);
+    }
+}
+
 // 0x4843A0
 void erase_rect(Rect* rect)
 {

src/mapper/map_func.h

@@ -7,6 +7,7 @@ namespace fallout {
 
 void setup_map_dirs();
 void copy_proto_lists();
+void draw_rect(Rect* rect);
 void erase_rect(Rect* rect);
 int toolbar_proto(int type, int id);
 bool map_toggle_block_obj_viewing_on();