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GradientInfo.cs
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GradientInfo.cs
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#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (c) 2007-2024 ShareX Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/
#endregion License Information (GPL v3)
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
namespace ShareX.HelpersLib
{
public class GradientInfo
{
[DefaultValue(LinearGradientMode.Vertical)]
public LinearGradientMode Type { get; set; }
public List<GradientStop> Colors { get; set; }
[JsonIgnore]
public bool IsValid => Colors != null && Colors.Count > 0;
[JsonIgnore]
public bool IsVisible => IsValid && Colors.Any(x => x.Color.A > 0);
[JsonIgnore]
public bool IsTransparent => IsValid && Colors.Any(x => x.Color.IsTransparent());
public GradientInfo() : this(LinearGradientMode.Vertical)
{
}
public GradientInfo(LinearGradientMode type)
{
Type = type;
Colors = new List<GradientStop>();
}
public GradientInfo(LinearGradientMode type, params GradientStop[] colors) : this(type)
{
Colors = colors.ToList();
}
public GradientInfo(LinearGradientMode type, params Color[] colors) : this(type)
{
for (int i = 0; i < colors.Length; i++)
{
Colors.Add(new GradientStop(colors[i], (int)Math.Round(100f / (colors.Length - 1) * i)));
}
}
public GradientInfo(params GradientStop[] colors) : this(LinearGradientMode.Vertical, colors)
{
}
public GradientInfo(params Color[] colors) : this(LinearGradientMode.Vertical, colors)
{
}
public void Clear()
{
Colors.Clear();
}
public void Sort()
{
Colors.Sort((x, y) => x.Location.CompareTo(y.Location));
}
public void Reverse()
{
Colors.Reverse();
foreach (GradientStop color in Colors)
{
color.Location = 100 - color.Location;
}
}
public ColorBlend GetColorBlend()
{
List<GradientStop> colors = new List<GradientStop>(Colors.OrderBy(x => x.Location));
if (!colors.Any(x => x.Location == 0))
{
colors.Insert(0, new GradientStop(colors[0].Color, 0f));
}
if (!colors.Any(x => x.Location == 100))
{
colors.Add(new GradientStop(colors[colors.Count - 1].Color, 100f));
}
ColorBlend colorBlend = new ColorBlend();
colorBlend.Colors = colors.Select(x => x.Color).ToArray();
colorBlend.Positions = colors.Select(x => x.Location / 100).ToArray();
return colorBlend;
}
public LinearGradientBrush GetGradientBrush(Rectangle rect)
{
LinearGradientBrush brush = new LinearGradientBrush(rect, Color.Transparent, Color.Transparent, Type);
brush.InterpolationColors = GetColorBlend();
return brush;
}
public void Draw(Graphics g, Rectangle rect)
{
if (IsValid)
{
try
{
using (LinearGradientBrush brush = GetGradientBrush(new Rectangle(0, 0, rect.Width, rect.Height)))
{
g.FillRectangle(brush, rect);
}
}
catch
{
}
}
}
public void Draw(Image img)
{
if (IsValid)
{
using (Graphics g = Graphics.FromImage(img))
{
Draw(g, new Rectangle(0, 0, img.Width, img.Height));
}
}
}
public Bitmap CreateGradientPreview(int width, int height, bool border = false, bool checkers = false)
{
Bitmap bmp = new Bitmap(width, height);
Rectangle rect = new Rectangle(0, 0, width, height);
using (Graphics g = Graphics.FromImage(bmp))
{
if (checkers && IsTransparent)
{
using (Image checker = ImageHelpers.CreateCheckerPattern())
using (Brush checkerBrush = new TextureBrush(checker, WrapMode.Tile))
{
g.FillRectangle(checkerBrush, rect);
}
}
Draw(g, rect);
if (border)
{
g.DrawRectangleProper(Pens.Black, rect);
}
}
return bmp;
}
public override string ToString()
{
return "Gradient";
}
}
}