using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace Eventech.DynPicture.Model
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{
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/// <summary>
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///
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/// </summary>
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public static class ImageExtension
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{
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/// <summary>
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/// 获取索引像素格式数组
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/// </summary>
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public static PixelFormat[] IndexedPixelFormats
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{
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get
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{
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return new PixelFormat[]
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{
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PixelFormat.Undefined,
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PixelFormat.DontCare,
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PixelFormat.Format16bppArgb1555,
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PixelFormat.Format16bppGrayScale,
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PixelFormat.Format1bppIndexed,
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PixelFormat.Format4bppIndexed,
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PixelFormat.Format8bppIndexed
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};
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}
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}
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/// <summary>
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/// 是否为索引像素格式
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/// </summary>
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/// <param name="format"></param>
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/// <returns></returns>
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public static bool IsPixelFormatIndexed(PixelFormat format)
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{
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if (IndexedPixelFormats.Contains(format))
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return true;
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return false;
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}
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/// <summary>
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/// 是否为索引像素格式
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/// </summary>
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/// <param name="img"></param>
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/// <returns></returns>
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public static bool IsPixelFormatIndexed(this Image img)
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{
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return IsPixelFormatIndexed(img.PixelFormat);
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}
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/// <summary>
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/// 自定义创建图片的副本（若PixelFormat为索引像素格式会抛异常））
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/// </summary>
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/// <param name="img"></param>
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/// <param name="format">默认Format32bppArgb</param>
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/// <returns></returns>
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public static Image CloneC(this Image img, PixelFormat format = PixelFormat.Format32bppArgb)
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{
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try
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{
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if (!IsPixelFormatIndexed(img.PixelFormat))
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{
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format = img.PixelFormat;
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}
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var bmp = new Bitmap(img.Width, img.Height, format);
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using (var g = Graphics.FromImage(bmp))
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
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g.DrawImage(img, new Rectangle(0, 0, bmp.Width, bmp.Height));
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}
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return bmp;
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}
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catch
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{
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return img;
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}
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}
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/// <summary>
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/// 在图片上绘制文字信息（图片像素格式不能为像素索引格式）
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/// </summary>
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/// <param name="g">绘制文字的图片</param>
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/// <param name="text">文本信息</param>
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/// <param name="pf">定位点</param>
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/// <param name="f">字体</param>
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/// <param name="fc">字体颜色</param>
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/// <param name="horiz">水平对齐方式</param>
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/// <param name="verti">垂直对齐方式</param>
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/// <param name="angle">旋转角度（顺时针）</param>
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public static void DrawString(this Graphics g, string text, PointF pf, Font f, Color fc,float angle=0, StringAlignment horiz = StringAlignment.Near, StringAlignment verti = StringAlignment.Near)
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{
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using (var brush = new SolidBrush(fc))
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using (var format = new StringFormat())
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(pf.X, pf.Y);
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g.RotateTransform(angle);
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format.Alignment = horiz;
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format.LineAlignment = verti;
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g.DrawString(text, f, brush, new PointF(0, 0), format);
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g.ResetTransform();
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}
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}
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/// <summary>
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/// 绘制文字信息（图片像素格式不能为像素索引格式）
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/// </summary>
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/// <param name="g"></param>
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/// <param name="text"></param>
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/// <param name="op">原点</param>
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/// <param name="pf">文字依据的点</param>
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/// <param name="fc">文字颜色</param>
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/// <param name="angle">旋转角度</param>
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/// <param name="horiz"></param>
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/// <param name="verti"></param>
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public static void DrawString(this Graphics g,string text,PointF op,SizeF size,Font f,Color fc,float angle=0, StringAlignment align = StringAlignment.Near,StringAlignment vlign=StringAlignment.Center)
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{
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using (var brush = new SolidBrush(fc))
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using (var format = new StringFormat())
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(op.X, op.Y);
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g.RotateTransform(angle);
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format.Alignment = align;
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format.LineAlignment = vlign;
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g.DrawString(text,f,brush,new RectangleF(0,0,size.Width,size.Height),format);
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g.ResetTransform();
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}
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}
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public static void DrawString(this Graphics g, string text, ImageInfoCoordinate info, Font f, Color fc,float scaleX,float scaleY, StringAlignment align = StringAlignment.Near, StringAlignment vlign = StringAlignment.Center)
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{
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using (var brush = new SolidBrush(fc))
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using (var format = new StringFormat())
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(info.Origin.X,info.Origin.Y);
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g.RotateTransform(info.Angle);
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if (scaleX <= 0)
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scaleX = 1f;
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if (scaleY <= 0)
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scaleY = 1f;
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g.ScaleTransform(scaleX,scaleY);
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format.Alignment = align;
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format.LineAlignment = vlign;
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var startPoint = new PointF(info.BeforeLeftTop.X-info.Origin.X,info.BeforeLeftTop.Y-info.Origin.Y);
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startPoint = new PointF(startPoint.X/scaleX,startPoint.Y/scaleY);
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var size = new SizeF(info.Size.Width/scaleX,info.Size.Height/scaleY);
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g.DrawString(text, f, brush, new RectangleF(startPoint, size), format);
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g.ResetTransform();
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}
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}
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/// <summary>
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/// 绘制图片
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/// </summary>
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/// <param name="g"></param>
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/// <param name="img"></param>
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/// <param name="pf"></param>
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/// <param name="angle"></param>
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/// <param name="?"></param>
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/// <param name="horiz"></param>
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/// <param name="verti"></param>
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public static void DrawImage(this Graphics g,Image img,PointF pf,float angle, StringAlignment horiz = StringAlignment.Center, StringAlignment verti = StringAlignment.Center)
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{
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PointF p = new PointF();
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switch(horiz)
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{
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case StringAlignment.Near:p.X=0;break;
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case StringAlignment.Center:p.X=-img.Width/2;break;
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case StringAlignment.Far:p.X=-img.Width;break;
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default:break;
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}
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switch(verti)
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{
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case StringAlignment.Near:p.Y=0;break;
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case StringAlignment.Center:p.Y=-img.Height/2;break;
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case StringAlignment.Far:p.Y=-img.Height;break;
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default:break;
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}
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(pf.X,pf.Y);
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g.RotateTransform(angle);
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g.DrawImage(img,p);
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g.ResetTransform();
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}
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/// <summary>
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/// 绘制箭头
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/// </summary>
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/// <param name="g"></param>
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/// <param name="pf">开始点</param>
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/// <param name="angle">旋转角度</param>
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/// <param name="lineWidth">箭头线宽</param>
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/// <param name="arrowWidth">箭头宽度</param>
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/// <param name="arrowLength">箭头长度</param>
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/// <param name="ac">箭头颜色</param>
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/// <param name="horiz"></param>
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/// <param name="verti"></param>
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public static void DrawArrow(this Graphics g, PointF pf,float angle,float lineWidth,float lineLength,Color lc, float arrowWidth, float arrowLength,Color ac)
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(pf.X, pf.Y);
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g.RotateTransform(angle);
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var halfLineWidth=lineWidth/2;
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var halfArrowWidth=arrowWidth/2;
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lineLength=lineLength-arrowLength;
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var lp1 = new PointF(0,halfLineWidth);
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var lp2 = new PointF(lineLength,halfLineWidth);
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var lp3 = new PointF(lineLength,-halfLineWidth);
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var lp4 = new PointF(0,-halfLineWidth);
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var lps = new PointF[] { lp1, lp2, lp3, lp4 };
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using (var lb = new SolidBrush(lc))
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{
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g.FillPolygon(lb, lps);
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}
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var ap1 = new PointF(lineLength,halfArrowWidth);
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var ap2 = new PointF(lineLength,-halfArrowWidth);
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var ap3 = new PointF(lineLength+arrowLength,0);
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var aps = new PointF[] { ap1,ap2,ap3};
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using (var ab = new SolidBrush(ac))
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{
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g.FillPolygon(ab, aps);
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}
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g.ResetTransform();
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}
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public static void DrawLine(this Graphics g, PointF pf, float angle, float lineWidth, float lineLength, Color lc, eLineStyle lineStyle)
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{
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g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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g.TranslateTransform(pf.X, pf.Y);
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g.RotateTransform(angle);
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using(var pen=new Pen(lc,lineWidth))
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{
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if (lineStyle == eLineStyle.Dotted)
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{
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pen.DashStyle = DashStyle.Custom;
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pen.DashPattern = new float[] { 10f,5f };
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}
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//pen.DashStyle=DashStyle.Dash;
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g.DrawLine(pen,0,0,lineLength,0);
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}
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g.ResetTransform();
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}
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/// <summary>
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/// 获取图片物理尺寸（KB）
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/// </summary>
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/// <param name="img"></param>
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/// <returns></returns>
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public static long GetPhysicalKb(this Image img)
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{
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using (var ms = new MemoryStream())
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{
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img.Save(ms, ImageFormat.Png);
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return ms.Length / 1024;
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}
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}
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}
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}
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