using System; using System.Collections.Generic; using System.Text; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.IO; namespace Loskiv.Utility { /**//// <summary> /// 名称：图片处理常用操作类 /// 作者：loskiv /// 创建时间：2009-07-07 /// </summary> public class ImageUtility { /**//// <summary> /// 获取指定mimeType的ImageCodecInfo /// </summary> private static ImageCodecInfo GetImageCodecInfo(string mimeType) { ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders(); foreach (ImageCodecInfo ici in CodecInfo) { if (ici.MimeType == mimeType) return ici; } return null; } /**//// <summary> /// 获取inputStream中的Bitmap对象 /// </summary> public static Bitmap GetBitmapFromStream(Stream inputStream) { Bitmap bitmap = new Bitmap(inputStream); return bitmap; } /**//// <summary> /// 将Bitmap对象压缩为JPG图片类型 /// </summary> /// </summary> /// <param name="bmp">源bitmap对象</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="quality">压缩质量，越大照片越清晰，推荐80</param> public static void CompressAsJPG(Bitmap bmp, string saveFilePath, int quality) { EncoderParameter p = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality); ; EncoderParameters ps = new EncoderParameters(1); ps.Param[0] = p; bmp.Save(saveFilePath, GetImageCodecInfo("image/jpeg"), ps); bmp.Dispose(); } /**//// <summary> /// 将inputStream中的对象压缩为JPG图片类型 /// </summary> /// <param name="inputStream">源Stream对象</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="quality">压缩质量，越大照片越清晰，推荐80</param> public static void CompressAsJPG(Stream inputStream, string saveFilePath, int quality) { Bitmap bmp = GetBitmapFromStream(inputStream); CompressAsJPG(bmp, saveFilePath, quality); } /**//// <summary> /// 生成缩略图（JPG 格式） /// </summary> /// <param name="inputStream">包含图片的Stream</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="width">缩略图的宽</param> /// <param name="height">缩略图的高</param> public static void ThumbAsJPG(Stream inputStream, string saveFilePath, int width, int height) { Image image = Image.FromStream(inputStream); if (image.Width == width && image.Height == height) { CompressAsJPG(inputStream, saveFilePath, 80); } int tWidth, tHeight, tLeft, tTop; double fScale = (double)height / (double)width; if (((double)image.Width * fScale) > (double)image.Height) { tWidth = width; tHeight = (int)((double)image.Height * (double)tWidth / (double)image.Width); tLeft = 0; tTop = (height - tHeight) / 2; } else { tHeight = height; tWidth = (int)((double)image.Width * (double)tHeight / (double)image.Height); tLeft = (width - tWidth) / 2; tTop = 0; } if (tLeft < 0) tLeft = 0; if (tTop < 0) tTop = 0; Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb); Graphics graphics = Graphics.FromImage(bitmap); //可以在这里设置填充背景颜色 graphics.Clear(Color.White); graphics.DrawImage(image, new Rectangle(tLeft, tTop, tWidth, tHeight)); image.Dispose(); try { CompressAsJPG(bitmap, saveFilePath, 80); } catch { ; } finally { bitmap.Dispose(); graphics.Dispose(); } } /**//// <summary> /// 将Bitmap对象裁剪为指定JPG文件 /// </summary> /// <param name="bmp">源bmp对象</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="x">开始坐标x，单位：像素</param> /// <param name="y">开始坐标y，单位：像素</param> /// <param name="width">宽度：像素</param> /// <param name="height">高度：像素</param> public static void CutAsJPG(Bitmap bmp, string saveFilePath, int x, int y, int width, int height) { int bmpW = bmp.Width; int bmpH = bmp.Height; if (x >= bmpW || y >= bmpH) { CompressAsJPG(bmp, saveFilePath, 80); return; } if (x + width > bmpW) { width = bmpW - x; } if (y + height > bmpH) { height = bmpH - y; } Bitmap bmpOut = new Bitmap(width, height, PixelFormat.Format24bppRgb); Graphics g = Graphics.FromImage(bmpOut); g.DrawImage(bmp, new Rectangle(0, 0, width, height), new Rectangle(x, y, width, height), GraphicsUnit.Pixel); g.Dispose(); bmp.Dispose(); CompressAsJPG(bmpOut, saveFilePath, 80); } /**//// <summary> /// 将Stream中的对象裁剪为指定JPG文件 /// </summary> /// <param name="inputStream">源bmp对象</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="x">开始坐标x，单位：像素</param> /// <param name="y">开始坐标y，单位：像素</param> /// <param name="width">宽度：像素</param> /// <param name="height">高度：像素</param> public static void CutAsJPG(Stream inputStream, string saveFilePath, int x, int y, int width, int height) { Bitmap bmp = GetBitmapFromStream(inputStream); CutAsJPG(bmp, saveFilePath, x, y, width, height); } 图片水印操作#region 图片水印操作 /**//// <summary> /// 给图片添加图片水印 /// </summary> /// <param name="inputStream">包含要源图片的流</param> /// <param name="watermarkPath">水印图片的物理地址</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="mp">水印位置</param> public static void AddPicWatermarkAsJPG(Stream inputStream, string watermarkPath, string saveFilePath, MarkPosition mp) { Image image = Image.FromStream(inputStream); Bitmap b = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb); Graphics g = Graphics.FromImage(b); g.Clear(Color.White); g.SmoothingMode = SmoothingMode.HighQuality; g.InterpolationMode = InterpolationMode.High; g.DrawImage(image, 0, 0, image.Width, image.Height); AddWatermarkImage(g, watermarkPath, mp, image.Width, image.Height); try { CompressAsJPG(b, saveFilePath, 80); } catch { ;} finally { b.Dispose(); image.Dispose(); } } /**//// <summary> /// 给图片添加图片水印 /// </summary> /// <param name="sourcePath">源图片的存储地址</param> /// <param name="watermarkPath">水印图片的物理地址</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="mp">水印位置</param> public static void AddPicWatermarkAsJPG(string sourcePath, string watermarkPath, string saveFilePath, MarkPosition mp) { if (File.Exists(sourcePath)) { using (StreamReader sr = new StreamReader(sourcePath)) { AddPicWatermarkAsJPG(sr.BaseStream, watermarkPath, saveFilePath, mp); } } } /**//// <summary> /// 给图片添加文字水印 /// </summary> /// <param name="inputStream">包含要源图片的流</param> /// <param name="text">水印文字</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="mp">水印位置</param> public static void AddTextWatermarkAsJPG(Stream inputStream, string text, string saveFilePath, MarkPosition mp) { Image image = Image.FromStream(inputStream); Bitmap b = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb); Graphics g = Graphics.FromImage(b); g.Clear(Color.White); g.SmoothingMode = SmoothingMode.HighQuality; g.InterpolationMode = InterpolationMode.High; g.DrawImage(image, 0, 0, image.Width, image.Height); AddWatermarkText(g, text, mp, image.Width, image.Height); try { CompressAsJPG(b, saveFilePath, 80); } catch { ;} finally { b.Dispose(); image.Dispose(); } } /**//// <summary> /// 给图片添加文字水印 /// </summary> /// <param name="sourcePath">源图片的存储地址</param> /// <param name="text">水印文字</param> /// <param name="saveFilePath">目标图片的存储地址</param> /// <param name="mp">水印位置</param> public static void AddTextWatermarkAsJPG(string sourcePath, string text, string saveFilePath, MarkPosition mp) { if (File.Exists(sourcePath)) { using (StreamReader sr = new StreamReader(sourcePath)) { AddTextWatermarkAsJPG(sr.BaseStream, text, saveFilePath, mp); } } } /**//// <summary> /// 添加文字水印 /// </summary> /// <param name="picture">要加水印的原图像</param> /// <param name="text">水印文字</param> /// <param name="mp">添加的位置</param> /// <param name="width">原图像的宽度</param> /// <param name="height">原图像的高度</param> private static void AddWatermarkText(Graphics picture, string text, MarkPosition mp, int width, int height) { int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 }; Font crFont = null; SizeF crSize = new SizeF(); for (int i = 0; i < 7; i++) { crFont = new Font("Arial", sizes[i], FontStyle.Bold); crSize = picture.MeasureString(text, crFont); if ((ushort)crSize.Width < (ushort)width) break; } float xpos = 0; float ypos = 0; switch (mp) { case MarkPosition.MP_Left_Top: xpos = ((float)width * (float).01) + (crSize.Width / 2); ypos = (float)height * (float).01; break; case MarkPosition.MP_Right_Top: xpos = ((float)width * (float).99) - (crSize.Width / 2); ypos = (float)height * (float).01; break; case MarkPosition.MP_Right_Bottom: xpos = ((float)width * (float).99) - (crSize.Width / 2); ypos = ((float)height * (float).99) - crSize.Height; break; case MarkPosition.MP_Left_Bottom: xpos = ((float)width * (float).01) + (crSize.Width / 2); ypos = ((float)height * (float).99) - crSize.Height; break; } StringFormat StrFormat = new StringFormat(); StrFormat.Alignment = StringAlignment.Center; SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0)); picture.DrawString(text, crFont, semiTransBrush2, xpos + 1, ypos + 1, StrFormat); SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255)); picture.DrawString(text, crFont, semiTransBrush, xpos, ypos, StrFormat); semiTransBrush2.Dispose(); semiTransBrush.Dispose(); } /**//// <summary> /// 添加图片水印 /// </summary> /// <param name="picture">要加水印的原图像</param> /// <param name="waterMarkPath">水印文件的物理地址</param> /// <param name="mp">添加的位置</param> /// <param name="width">原图像的宽度</param> /// <param name="height">原图像的高度</param> private static void AddWatermarkImage(Graphics picture, string waterMarkPath, MarkPosition mp, int width, int height) { Image watermark = new Bitmap(waterMarkPath); ImageAttributes imageAttributes = new ImageAttributes(); ColorMap colorMap = new ColorMap(); colorMap.OldColor = Color.FromArgb(255, 0, 255, 0); colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); ColorMap[] remapTable = { colorMap }; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); float[][] colorMatrixElements = { new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f} }; ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); int xpos = 0; int ypos = 0; int WatermarkWidth = 0; int WatermarkHeight = 0; double bl = 1d; if ((width > watermark.Width * 4) && (height > watermark.Height * 4)) { bl = 1; } else if ((width > watermark.Width * 4) && (height < watermark.Height * 4)) { bl = Convert.ToDouble(height / 4) / Convert.ToDouble(watermark.Height); } else if ((width < watermark.Width * 4) && (height > watermark.Height * 4)) { bl = Convert.ToDouble(width / 4) / Convert.ToDouble(watermark.Width); } else { if ((width * watermark.Height) > (height * watermark.Width)) { bl = Convert.ToDouble(height / 4) / Convert.ToDouble(watermark.Height); } else { bl = Convert.ToDouble(width / 4) / Convert.ToDouble(watermark.Width); } } WatermarkWidth = Convert.ToInt32(watermark.Width * bl); WatermarkHeight = Convert.ToInt32(watermark.Height * bl); switch (mp) { case MarkPosition.MP_Left_Top: xpos = 10; ypos = 10; break; case MarkPosition.MP_Right_Top: xpos = width - WatermarkWidth - 10; ypos = 10; break; case MarkPosition.MP_Right_Bottom: xpos = width - WatermarkWidth - 10; ypos = height - WatermarkHeight - 10; break; case MarkPosition.MP_Left_Bottom: xpos = 10; ypos = height - WatermarkHeight - 10; break; } picture.DrawImage(watermark, new Rectangle(xpos, ypos, WatermarkWidth, WatermarkHeight), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes); watermark.Dispose(); imageAttributes.Dispose(); } /**//// <summary> /// 水印的位置 /// </summary> public enum MarkPosition { /**//// <summary> /// 左上角 /// </summary> MP_Left_Top, /**//// <summary> /// 左下角 /// </summary> MP_Left_Bottom, /**//// <summary> /// 右上角 /// </summary> MP_Right_Top, /**//// <summary> /// 右下角 /// </summary> MP_Right_Bottom } #endregion } }