217 lines
9.8 KiB
C#
217 lines
9.8 KiB
C#
//using SixLabors.Fonts;
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//using SixLabors.ImageSharp;
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//using SixLabors.ImageSharp.PixelFormats;
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//using SixLabors.ImageSharp.Processing;
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//using System;
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//using System.Collections.Generic;
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//namespace Hei.Captcha
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//{
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// public static class ImageSharpExtension
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// {
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// / <summary>
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// / 绘制中文字符（可以绘制字母数字，但样式可能需要改）
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// / </summary>
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// / <typeparam name = "TPixel" ></ typeparam >
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// / < param name="processingContext"></param>
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// / <param name = "containerWidth" ></ param >
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// / < param name="containerHeight"></param>
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// / <param name = "text" ></ param >
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// / < param name="color"></param>
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// / <param name = "font" ></ param >
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// / < returns ></ returns >
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// public static IImageProcessingContext<TPixel> DrawingCnText<TPixel>(this IImageProcessingContext<TPixel> processingContext, int containerWidth, int containerHeight, string text, Rgba32 color, Font font)
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// where TPixel : struct, IPixel<TPixel>
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// {
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// return processingContext.Apply(img =>
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// {
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// if (string.IsNullOrEmpty(text) == false)
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// {
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// Random random = new Random();
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// var textWidth = (img.Width / text.Length);
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// var img2Size = Math.Min(textWidth, img.Height);
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// var fontMiniSize = (int)(img2Size * 0.6);
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// var fontMaxSize = (int)(img2Size * 0.95);
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// for (int i = 0; i < text.Length; i++)
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// {
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// using (Image<Rgba32> img2 = new Image<Rgba32>(img2Size, img2Size))
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// {
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// Font scaledFont = new Font(font, random.Next(fontMiniSize, fontMaxSize));
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// var point = new Point(i * textWidth, (containerHeight - img2.Height) / 2);
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// var textGraphicsOptions = new TextGraphicsOptions(true)
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// {
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// HorizontalAlignment = HorizontalAlignment.Left,
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// VerticalAlignment = VerticalAlignment.Top
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// };
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// img2.Mutate(ctx => ctx
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// .DrawText(textGraphicsOptions, text[i].ToString(), scaledFont, color, new Point(0, 0))
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// .Rotate(random.Next(-45, 45))
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// );
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// img.Mutate(ctx => ctx.DrawImage(img2, point, 1));
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// }
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// }
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// }
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// });
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// }
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// public static IImageProcessingContext<TPixel> DrawingEnText<TPixel>(this IImageProcessingContext<TPixel> processingContext, int containerWidth, int containerHeight, string text, string[] colorHexArr, Font[] fonts)
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// where TPixel : struct, IPixel<TPixel>
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// {
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// return processingContext.Apply(img =>
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// {
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// if (string.IsNullOrEmpty(text) == false)
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// {
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// Random random = new Random();
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// var textWidth = (img.Width / text.Length);
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// var img2Size = Math.Min(textWidth, img.Height);
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// var fontMiniSize = (int)(img2Size * 0.9);
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// var fontMaxSize = (int)(img2Size * 1.37);
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// Array fontStyleArr = Enum.GetValues(typeof(FontStyle));
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// for (int i = 0; i < text.Length; i++)
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// {
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// using (Image<Rgba32> img2 = new Image<Rgba32>(img2Size, img2Size))
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// {
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// Font scaledFont = new Font(fonts[random.Next(0, fonts.Length)], random.Next(fontMiniSize, fontMaxSize), (FontStyle)fontStyleArr.GetValue(random.Next(fontStyleArr.Length)));
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// var point = new Point(i * textWidth, (containerHeight - img2.Height) / 2);
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// var colorHex = colorHexArr[random.Next(0, colorHexArr.Length)];
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// var textGraphicsOptions = new TextGraphicsOptions(true)
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// {
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// HorizontalAlignment = HorizontalAlignment.Left,
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// VerticalAlignment = VerticalAlignment.Top
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// };
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// img2.Mutate(ctx => ctx
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// .DrawText(textGraphicsOptions, text[i].ToString(), scaledFont, Rgba32.FromHex(colorHex), new Point(0, 0))
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// .DrawingGrid(containerWidth, containerHeight, Rgba32.FromHex(colorHex), 6, 1)
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// .Rotate(random.Next(-45, 45))
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// );
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// img.Mutate(ctx => ctx.DrawImage(img2, point, 1));
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// }
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// }
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// }
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// });
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// }
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// / <summary>
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// / 画圆圈（泡泡）
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// / </summary>
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// / <typeparam name = "TPixel" ></ typeparam >
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// / < param name="processingContext"></param>
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// / <param name = "containerWidth" ></ param >
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// / < param name="containerHeight"></param>
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// / <param name = "count" ></ param >
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// / < param name="miniR"></param>
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// / <param name = "maxR" ></ param >
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// / < param name="color"></param>
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// / <param name = "canOverlap" ></ param >
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// / < returns ></ returns >
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// public static IImageProcessingContext<TPixel> DrawingCircles<TPixel>(this IImageProcessingContext<TPixel> processingContext, int containerWidth, int containerHeight, int count, int miniR, int maxR, TPixel color, bool canOverlap = false)
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// where TPixel : struct, IPixel<TPixel>
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// {
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// return processingContext.Apply(img =>
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// {
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// EllipsePolygon ep = null;
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// Random random = new Random();
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// PointF tempPoint = new PointF();
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// List<PointF> points = new List<PointF>();
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// if (count > 0)
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// {
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// for (int i = 0; i < count; i++)
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// {
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// if (canOverlap)
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// {
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// tempPoint = new PointF(random.Next(0, containerWidth), random.Next(0, containerHeight));
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// }
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// else
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// {
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// tempPoint = getCirclePoginF(containerWidth, containerHeight, (miniR + maxR), ref points);
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// }
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// ep = new EllipsePolygon(tempPoint, random.Next(miniR, maxR));
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// img.Mutate(ctx => ctx
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// .Draw(color, (float)(random.Next(94, 145) / 100.0), ep.Clip())
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// );
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// }
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// }
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// });
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// }
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// / <summary>
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// / 画杂线
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// / </summary>
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// / <typeparam name = "TPixel" ></ typeparam >
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// / < param name="processingContext"></param>
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// / <param name = "containerWidth" ></ param >
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// / < param name="containerHeight"></param>
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// / <param name = "color" ></ param >
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// / < param name="count"></param>
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// / <param name = "thickness" ></ param >
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// / < returns ></ returns >
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// public static IImageProcessingContext<TPixel> DrawingGrid<TPixel>(this IImageProcessingContext<TPixel> processingContext, int containerWidth, int containerHeight, TPixel color, int count, float thickness)
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// where TPixel : struct, IPixel<TPixel>
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// {
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// return processingContext.Apply(img =>
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// {
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// var points = new List<PointF> { new PointF(0, 0) };
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// for (int i = 0; i < count; i++)
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// {
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// getCirclePoginF(containerWidth, containerHeight, 9, ref points);
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// }
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// points.Add(new PointF(containerWidth, containerHeight));
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// img.Mutate(ctx => ctx
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// .DrawLines(color, thickness, points.ToArray())
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// );
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// });
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// }
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// / <summary>
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// / 散 随机点
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// / </summary>
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// / <param name = "containerWidth" ></ param >
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// / < param name="containerHeight"></param>
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// / <param name = "lapR" ></ param >
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// / < param name="list"></param>
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// / <returns></returns>
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// private static PointF getCirclePoginF(int containerWidth, int containerHeight, double lapR, ref List<PointF> list)
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// {
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// Random random = new Random();
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// PointF newPoint = new PointF();
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// int retryTimes = 10;
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// double tempDistance = 0;
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// do
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// {
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// newPoint.X = random.Next(0, containerWidth);
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// newPoint.Y = random.Next(0, containerHeight);
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// bool tooClose = false;
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// foreach (var p in list)
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// {
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// tooClose = false;
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// tempDistance = Math.Sqrt((Math.Pow((p.X - newPoint.X), 2) + Math.Pow((p.Y - newPoint.Y), 2)));
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// if (tempDistance < lapR)
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// {
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// tooClose = true;
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// break;
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// }
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// }
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// if (tooClose == false)
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// {
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// list.Add(newPoint);
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// break;
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// }
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// }
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// while (retryTimes-- > 0);
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// if (retryTimes <= 0)
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// {
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// list.Add(newPoint);
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// }
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// return newPoint;
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// }
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// }
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//}
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