LibGfx/Painter: Add `draw_rect_with_thickness` method

Previously there was no way to draw rectangles with any specific
thickness, like we can do with ellises, for instance. This method
is just a simple wrapper around `draw_line()` several times. At
least for now, we don't need to do anything sophisticated since
this will only be used by PixelPaint.`

2 files changed, 17 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGfx/Painter.cpp b/Userland/Libraries/LibGfx/Painter.cpp
index b5f06dd68a..1a63448764 100644
--- a/Userland/Libraries/LibGfx/Painter.cpp
+++ b/Userland/Libraries/LibGfx/Painter.cpp
@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
  * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
+ * Copyright (c) 2021, Mustafa Quraish <mustafa@cs.toronto.edu>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -585,6 +586,21 @@ void Painter::draw_rect(const IntRect& a_rect, Color color, bool rough)
     }
 }
 
+void Painter::draw_rect_with_thickness(const IntRect& rect, Color color, int thickness)
+{
+    VERIFY(scale() == 1); // FIXME: Add scaling support.
+
+    IntPoint p1 = rect.location();
+    IntPoint p2 = { rect.location().x() + rect.width(), rect.location().y() };
+    IntPoint p3 = { rect.location().x() + rect.width(), rect.location().y() + rect.height() };
+    IntPoint p4 = { rect.location().x(), rect.location().y() + rect.height() };
+
+    draw_line(p1, p2, color, thickness);
+    draw_line(p2, p3, color, thickness);
+    draw_line(p3, p4, color, thickness);
+    draw_line(p4, p1, color, thickness);
+}
+
 void Painter::draw_bitmap(const IntPoint& p, const CharacterBitmap& bitmap, Color color)
 {
     VERIFY(scale() == 1); // FIXME: Add scaling support.
diff --git a/Userland/Libraries/LibGfx/Painter.h b/Userland/Libraries/LibGfx/Painter.h
index 48946e9c7c..96b9c2be6a 100644
--- a/Userland/Libraries/LibGfx/Painter.h
+++ b/Userland/Libraries/LibGfx/Painter.h
@@ -42,6 +42,7 @@ public:
     void fill_rect_with_rounded_corners(const IntRect&, Color, int top_left_radius, int top_right_radius, int bottom_right_radius, int bottom_left_radius);
     void fill_ellipse(const IntRect&, Color);
     void draw_rect(const IntRect&, Color, bool rough = false);
+    void draw_rect_with_thickness(const IntRect&, Color, int thickness);
     void draw_focus_rect(const IntRect&, Color);
     void draw_bitmap(const IntPoint&, const CharacterBitmap&, Color = Color());
     void draw_bitmap(const IntPoint&, const GlyphBitmap&, Color = Color());