From 84aecfa823c5808e5946dbfd58be6e85414aca59 Mon Sep 17 00:00:00 2001
From: Alexander Batalov <alex.batalov@gmail.com>
Date: Sat, 2 Sep 2023 20:07:02 +0300
Subject: [PATCH] Add draw_rect

---
 src/mapper/map_func.cc | 26 ++++++++++++++++++++++++++
 src/mapper/map_func.h  |  1 +
 2 files changed, 27 insertions(+)

diff --git a/src/mapper/map_func.cc b/src/mapper/map_func.cc
index f328b0a..8b032f2 100644
--- a/src/mapper/map_func.cc
+++ b/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)
 {
diff --git a/src/mapper/map_func.h b/src/mapper/map_func.h
index 0961c90..3d03b42 100644
--- a/src/mapper/map_func.h
+++ b/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();