From 3dfac10e822829819ed979db177153ce24de2bdf Mon Sep 17 00:00:00 2001
From: Jaex <Jaex@users.noreply.github.com>
Date: Sun, 15 Sep 2019 10:51:05 +0300
Subject: [PATCH] Added multi color gradient support to background image effect

---
 ShareX.HelpersLib/Helpers/ImageHelpers.cs     |  8 +++++
 .../Drawings/DrawBackground.cs                | 29 +++++++++++++++++--
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/ShareX.HelpersLib/Helpers/ImageHelpers.cs b/ShareX.HelpersLib/Helpers/ImageHelpers.cs
index 3b7e0faf4..56c9e2394 100644
--- a/ShareX.HelpersLib/Helpers/ImageHelpers.cs
+++ b/ShareX.HelpersLib/Helpers/ImageHelpers.cs
@@ -700,6 +700,14 @@ public static Bitmap FillBackground(Image img, Color fromColor, Color toColor, L
             }
         }
 
+        public static Bitmap FillBackground(Image img, GradientInfo gradientInfo)
+        {
+            using (LinearGradientBrush brush = gradientInfo.GetGradientBrush(new Rectangle(0, 0, img.Width, img.Height)))
+            {
+                return FillBackground(img, brush);
+            }
+        }
+
         public static Bitmap FillBackground(Image img, Brush brush)
         {
             Bitmap result = img.CreateEmptyBitmap();
diff --git a/ShareX.ImageEffectsLib/Drawings/DrawBackground.cs b/ShareX.ImageEffectsLib/Drawings/DrawBackground.cs
index 023d672f5..0307abe37 100644
--- a/ShareX.ImageEffectsLib/Drawings/DrawBackground.cs
+++ b/ShareX.ImageEffectsLib/Drawings/DrawBackground.cs
@@ -40,22 +40,45 @@ public class DrawBackground : ImageEffect
         [DefaultValue(false)]
         public bool UseGradient { get; set; }
 
+        [DefaultValue(LinearGradientMode.Vertical)]
+        public LinearGradientMode GradientType { get; set; }
+
         [DefaultValue(typeof(Color), "White"), Editor(typeof(MyColorEditor), typeof(UITypeEditor)), TypeConverter(typeof(MyColorConverter))]
         public Color Color2 { get; set; }
 
-        [DefaultValue(LinearGradientMode.Vertical)]
-        public LinearGradientMode GradientType { get; set; }
+        [DefaultValue(false)]
+        public bool UseCustomGradient { get; set; }
+
+        [Editor(typeof(GradientEditor), typeof(UITypeEditor))]
+        public GradientInfo Gradient { get; set; }
 
         public DrawBackground()
         {
             this.ApplyDefaultPropertyValues();
+            AddDefaultGradient();
+        }
+
+        private void AddDefaultGradient()
+        {
+            Gradient = new GradientInfo();
+            Gradient.Colors.Add(new GradientStop(Color.FromArgb(68, 120, 194), 0f));
+            Gradient.Colors.Add(new GradientStop(Color.FromArgb(13, 58, 122), 50f));
+            Gradient.Colors.Add(new GradientStop(Color.FromArgb(6, 36, 78), 50f));
+            Gradient.Colors.Add(new GradientStop(Color.FromArgb(23, 89, 174), 100f));
         }
 
         public override Image Apply(Image img)
         {
             if (UseGradient)
             {
-                return ImageHelpers.FillBackground(img, Color, Color2, GradientType);
+                if (UseCustomGradient && Gradient != null && Gradient.IsValid)
+                {
+                    return ImageHelpers.FillBackground(img, Gradient);
+                }
+                else
+                {
+                    return ImageHelpers.FillBackground(img, Color, Color2, GradientType);
+                }
             }
 
             return ImageHelpers.FillBackground(img, Color);