From 8f6214671ce431f1bd59488b23803fa0d14da144 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Mierzyn=CC=81ski?=
 <mierzynski.michal@gmail.com>
Date: Mon, 25 Feb 2019 09:26:11 +0100
Subject: [PATCH 1/2] Fixed the problem with barcode rendering upside down on
 macOS

---
 Source/ZXing.Net.Mobile.macOS/BitmapRenderer.cs | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/Source/ZXing.Net.Mobile.macOS/BitmapRenderer.cs b/Source/ZXing.Net.Mobile.macOS/BitmapRenderer.cs
index b953c2760..7f8288cae 100644
--- a/Source/ZXing.Net.Mobile.macOS/BitmapRenderer.cs
+++ b/Source/ZXing.Net.Mobile.macOS/BitmapRenderer.cs
@@ -1,18 +1,13 @@
 using System;
 using ZXing.Rendering;
-
-using Foundation;
-using CoreFoundation;
 using CoreGraphics;
 using AppKit;
-
 using ZXing.Common;
 
 namespace ZXing.Mobile
 {
     public class BitmapRenderer : IBarcodeRenderer<NSImage>
     {
-
         public NSImage Render(BitMatrix matrix, BarcodeFormat format, string content)
         {
             return Render(matrix, format, content, new EncodingOptions());
@@ -25,11 +20,12 @@ public NSImage Render(BitMatrix matrix, BarcodeFormat format, string content, En
             var black = new CGColor(0f, 0f, 0f);
             var white = new CGColor(1.0f, 1.0f, 1.0f);
 
-            for (int x = 0; x < matrix.Width; x++)
+            for (var x = 0; x < matrix.Width; x++)
             {
-                for (int y = 0; y < matrix.Height; y++)
+                for (var y = 0; y < matrix.Height; y++)
                 {
-                    context.SetFillColor(matrix[x, y] ? black : white);
+                    var (cgX, cgY) = TransformToCoreGraphicsCoords(x, y, matrix);
+                    context.SetFillColor(matrix[cgX, cgY] ? black : white);
                     context.FillRect(new CGRect(x, y, 1, 1));
                 }
             }
@@ -39,5 +35,10 @@ public NSImage Render(BitMatrix matrix, BarcodeFormat format, string content, En
 
             return img;
         }
+
+        private static (int cgX, int cgY) TransformToCoreGraphicsCoords(int x, int y, BitMatrix matrix)
+        {
+            return (x, Math.Abs(y - matrix.Height + 1));
+        }
     }
 }

From 1d1a1d9f632e47cd5ed990ab6a38f794d8241c7a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Mierzyn=CC=81ski?=
 <mierzynski.michal@gmail.com>
Date: Mon, 25 Feb 2019 09:26:48 +0100
Subject: [PATCH 2/2] Changed minimum os version for macOS sample

---
 Samples/macOS/Sample.macOS/Info.plist | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Samples/macOS/Sample.macOS/Info.plist b/Samples/macOS/Sample.macOS/Info.plist
index 5ff82decb..9629bb950 100644
--- a/Samples/macOS/Sample.macOS/Info.plist
+++ b/Samples/macOS/Sample.macOS/Info.plist
@@ -11,7 +11,7 @@
 	<key>CFBundleVersion</key>
 	<string>1</string>
 	<key>LSMinimumSystemVersion</key>
-	<string>10.14</string>
+	<string>10.13</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleInfoDictionaryVersion</key>