cyf
398 lines
15 KiB
C#
398 lines
15 KiB
C#
using System;
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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.Web;
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using Zhaizj.Framework.Web;
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using Zhaizj.Framework.Web.Utils;
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namespace Zhaizj.Framework.Drawing {
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/// <summary>
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/// 图片常用操作
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/// </summary>
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public class Img {
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private static readonly ILog logger = LogManager.GetLogger( typeof( Img ) );
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private static Random rd = new Random();
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/// <summary>
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/// 删除图片以及缩略图。如果图片不存在，则忽略
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/// </summary>
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/// <param name="srcPath">相对网址</param>
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public static void DeleteImgAndThumb( String srcPath ) {
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DeleteImgAndThumb( srcPath, Uploader.ThumbTypes );
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}
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/// <summary>
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/// 删除图片以及指定类型的缩略图。如果图片不存在，则忽略
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/// </summary>
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/// <param name="srcPath">相对网址</param>
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/// <param name="arrThumbType">多个缩略图类型</param>
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public static void DeleteImgAndThumb( String srcPath, ThumbnailType[] arrThumbType ) {
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if (strUtil.IsNullOrEmpty( srcPath )) return;
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if (srcPath.ToLower().StartsWith( "http://" )) return;
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String path = PathHelper.Map( srcPath );
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if (file.Exists( path ))
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Zhaizj.Framework.IO.File.Delete( path );
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foreach (ThumbnailType ttype in arrThumbType) {
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String pathThumb = PathHelper.Map( GetThumbPath( srcPath, ttype ) );
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if (file.Exists( pathThumb ))
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Zhaizj.Framework.IO.File.Delete( pathThumb );
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}
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}
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/// <summary>
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/// 彻底删除磁盘文件
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/// </summary>
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/// <param name="srcPath">相对路径</param>
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public static void DeleteFile( String srcPath ) {
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if (strUtil.IsNullOrEmpty( srcPath )) return;
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if (srcPath.ToLower().StartsWith( "http://" )) return;
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String path = PathHelper.Map( srcPath );
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if (file.Exists( path ))
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Zhaizj.Framework.IO.File.Delete( path );
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}
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/// <summary>
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/// 获取图片的随机文件名(会添加日期文件夹和随机文件名)，比如 2009-9-28/1530703343314547.jpg
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/// </summary>
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/// <remarks>如果日期文件夹不存在，则在磁盘上自动创建文件夹</remarks>
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/// <param name="pathName">图片存储的绝对路径</param>
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/// <param name="strContentType">图片类型</param>
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/// <returns>返回图片名称，包括所在文件夹，比如 2009-9-28/1530703343314547.jpg</returns>
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public static String GetPhotoName( String absPath, String strContentType ) {
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DateTime now = DateTime.Now;
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String strDir = getDirName( now );
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String strRandom = rd.Next( 100000000, 999999999 ).ToString();
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String strFile = now.Hour.ToString() + now.Minute.ToString() + now.Second.ToString() + now.Millisecond.ToString() + strRandom;
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strFile = strUtil.Join( strFile, GetImageExt( strContentType ), "." );
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String fullDir = Path.Combine( absPath, strDir );
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if (!Directory.Exists( fullDir )) {
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Directory.CreateDirectory( fullDir );
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}
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return Path.Combine( strDir, strFile );
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}
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//private static string getDirName( DateTime now ) {
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// return string.Format( "{0}-{1}-{2}", now.Year, now.Month, now.Day );
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//}
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private static string getDirName( DateTime now ) {
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return string.Format( "{0}/{1}/{2}", now.Year, now.Month, now.Day );
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}
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/// <summary>
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/// 获取文件的随机文件名(会添加日期文件夹和随机文件名)，比如 2009-9-28/1530703343314547.zip
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/// </summary>
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/// <remarks>如果日期文件夹不存在，则在磁盘上自动创建文件夹</remarks>
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/// <param name="pathName">存储路径</param>
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/// <param name="fileExt">文件类型</param>
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/// <returns>返回文件名称，包括所在文件夹，比如 2009-9-28/1530703343314547.zip</returns>
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public static String GetFileName( String pathName, String fileExt ) {
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DateTime now = DateTime.Now;
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String strDate = getDirName( now );
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String strRandom = rd.Next( 100000000, 999999999 ).ToString();
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String strFile = now.Hour.ToString() + now.Minute.ToString() + now.Second.ToString() + now.Millisecond.ToString() + strRandom;
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strFile = strUtil.Join( strFile, fileExt, "." );
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String path = Path.Combine( pathName, strDate );
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if (!Directory.Exists( path )) {
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Directory.CreateDirectory( path );
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}
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return Path.Combine( strDate, strFile );
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}
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/// <summary>
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/// 根据缩略图名称，获取原始图片名称
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/// </summary>
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/// <param name="thumbPath"></param>
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/// <returns></returns>
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public static String GetOriginalPath( String thumbPath ) {
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String path = thumbPath.Trim();
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String ext = Path.GetExtension( path );
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String pathWithoutExt = strUtil.TrimEnd( path, ext );
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if (pathWithoutExt.EndsWith( "_s" )) {
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return strUtil.TrimEnd( pathWithoutExt, "_s" ) + ext;
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}
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if (pathWithoutExt.EndsWith( "_m" )) {
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return strUtil.TrimEnd( pathWithoutExt, "_m" ) + ext;
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}
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if (pathWithoutExt.EndsWith( "_b" )) {
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return strUtil.TrimEnd( pathWithoutExt, "_b" ) + ext;
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}
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return path;
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}
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/// <summary>
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/// 根据原始图片名称，获取缩略图名称(最小的缩略图)
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/// </summary>
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/// <param name="srcPath"></param>
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/// <returns></returns>
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public static String GetThumbPath( Object srcPath ) {
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if (srcPath == null) return null;
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if (strUtil.IsNullOrEmpty( srcPath.ToString() )) return null;
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return GetThumbPath( srcPath, ThumbnailType.Small );
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}
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/// <summary>
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/// 根据原始图片名称和缩略图类型，获取缩略图名称
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="ttype"></param>
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/// <returns></returns>
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public static String GetThumbPath( Object srcPath, ThumbnailType ttype ) {
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if (srcPath == null) return "";
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String path = srcPath.ToString();
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if (strUtil.IsNullOrEmpty( path )) return "";
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String ext = Path.GetExtension( path );
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String pathWithoutExt = strUtil.TrimEnd( path, ext );
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if (pathWithoutExt.EndsWith( "_s" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_s" );
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if (pathWithoutExt.EndsWith( "_b" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_b" );
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if (pathWithoutExt.EndsWith( "_m" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_m" );
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String suffix = "_s";
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if (ttype == ThumbnailType.Medium)
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suffix = "_m";
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else if (ttype == ThumbnailType.Big)
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suffix = "_b";
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return pathWithoutExt + suffix + ext;
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}
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/// <summary>
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/// 保存缩略图到磁盘(可指定宽度，默认自动缩放)
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="destPath"></param>
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/// <param name="width"></param>
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public static void SaveThumbnail( String srcPath, String destPath, int width ) {
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SaveThumbnail( srcPath, destPath, width, width, SaveThumbnailMode.Auto );
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}
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/// <summary>
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/// 保存缩略图到磁盘(可指定宽高，默认自动缩放)
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="destPath"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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public static void SaveThumbnail( String srcPath, String destPath, int width, int height ) {
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SaveThumbnail( srcPath, destPath, width, height, SaveThumbnailMode.Auto );
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}
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/// <summary>
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/// 保存缩略图到磁盘(可指定宽高，可指定缩放模式)
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="destPath"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <param name="mode"></param>
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public static void SaveThumbnail( String srcPath, String destPath, int width, int height, SaveThumbnailMode mode ) {
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using (Image srcImg = Image.FromFile( srcPath )) {
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ThumbSize t = getTargetSize( width, height, mode, srcImg );
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using (Bitmap newImg = new Bitmap( t.New.Width, t.New.Height )) {
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using (Graphics g = Graphics.FromImage( newImg )) {
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g.InterpolationMode = InterpolationMode.High;
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g.SmoothingMode = SmoothingMode.HighQuality;
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g.Clear( Color.Transparent );
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g.DrawImage( srcImg, t.getNewRect(), t.getRect(), GraphicsUnit.Pixel );
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try {
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newImg.Save( destPath, ImageFormat.Jpeg );
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}
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catch (Exception e) {
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throw e;
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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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/// 获取缩略图尺寸
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/// </summary>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <param name="mode"></param>
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/// <param name="src"></param>
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/// <returns></returns>
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public static ThumbSize getTargetSize( int width, int height, SaveThumbnailMode mode, Image src ) {
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ThumbSize t = new ThumbSize();
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t.Src = new Size( src.Width, src.Height );
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t.Point = new Point( 0, 0 );
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if (mode == SaveThumbnailMode.ByWidth) {
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int newHeight = src.Height * width / src.Width;
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t.New = new Size( width, newHeight );
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return t;
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}
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else if (mode == SaveThumbnailMode.ByHeight) {
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int newWidth = src.Width * height / src.Height;
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t.New = new Size( newWidth, height );
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return t;
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}
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else if (mode == SaveThumbnailMode.ByWidthHeight) {
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t.New = new Size( width, height );
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return t;
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}
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else if (mode == SaveThumbnailMode.Cut) {
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return getCutSize( width, height, mode, src );
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}
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return getAutoSize( width, height, mode, src );
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}
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private static ThumbSize getAutoSize( int width, int height, SaveThumbnailMode mode, Image src ) {
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ThumbSize t = new ThumbSize();
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t.Src = new Size( src.Width, src.Height );
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t.Point = new Point( 0, 0 );
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int newWidth = width;
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int newHeight = height;
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if ((double)src.Width / (double)src.Height > (double)width / (double)height)
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newHeight = src.Height * width / src.Width;
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else
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newWidth = src.Width * height / src.Height;
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t.New = new Size( newWidth, newHeight );
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return t;
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}
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private static ThumbSize getCutSize( int width, int height, SaveThumbnailMode mode, Image src ) {
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ThumbSize t = new ThumbSize();
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if ((double)src.Width / (double)src.Height > (double)width / (double)height) {
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int newWidth = src.Height * width / height;
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t.Src = new Size( newWidth, src.Height );
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t.New = new Size( width, height );
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t.Point = new Point( (src.Width - newWidth) / 2, 0 );
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}
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else {
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int newHeight = src.Width * height / width;
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t.Src = new Size( src.Width, newHeight );
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t.New = new Size( width, height );
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t.Point = new Point( 0, (src.Height - newHeight) / 2 );
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}
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return t;
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}
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/// <summary>
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/// 获取图片的后缀名(不包括点号)
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/// </summary>
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/// <param name="strContentType"></param>
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/// <returns></returns>
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public static String GetImageExt( String strContentType ) {
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if (strUtil.IsNullOrEmpty( strContentType )) return null;
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String t = strContentType.ToLower();
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logger.Info( "strContentType=>" + t );
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if (t.Equals( ".gif" )) return "gif";
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if (t.Equals( ".bmp" )) return "bmp";
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if (t.Equals( ".png" )) return "png";
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if (t.Equals( ".jpg" )) return "jpg";
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if (t.Equals( ".jpeg" )) return "jpeg";
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if (t.Equals( "gif" )) return "gif";
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if (t.Equals( "bmp" )) return "bmp";
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if (t.Equals( "png" )) return "png";
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if (t.Equals( "jpg" )) return "jpg";
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if (t.Equals( "jpeg" )) return "jpeg";
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if (t.Equals( "image/gif")) return "gif";
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if (t.Equals( "image/bmp")) return "bmp";
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if (t.Equals( "image/tiff")) return "tiff";
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if (t.Equals( "image/x-icon")) return "icon";
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if (t.Equals( "image/x-png")) return "png"; // ie
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if (t.Equals( "image/png" )) return "png"; // firefox, google
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if (t.Equals( "image/x-emf")) return "emf";
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if (t.Equals( "image/x-exif")) return "exif";
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if (t.Equals( "image/x-wmf")) return "wmf";
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if (t.Equals( "image/pjpeg")) return "jpg"; // ie6
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if (t.Equals( "image/jpg" )) return "jpg"; // ie8
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if (t.Equals( "image/jpeg" )) return "jpg"; // firefox, google
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return "jpg";
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}
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/// <summary>
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/// 获取图片的类型
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/// </summary>
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/// <param name="strContentType"></param>
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/// <returns></returns>
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public static ImageFormat GetImageType( String strContentType ) {
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if (strUtil.IsNullOrEmpty( strContentType )) return null;
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String t = strContentType.ToLower();
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if (t.Equals( ".gif" )) return ImageFormat.Gif;
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if (t.Equals( ".bmp" )) return ImageFormat.Bmp;
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if (t.Equals( ".png" )) return ImageFormat.Png;
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if (t.Equals( ".jpg" )) return ImageFormat.Jpeg;
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if (t.Equals( ".jpeg" )) return ImageFormat.Jpeg;
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if (t.Equals( "gif" )) return ImageFormat.Gif;
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if (t.Equals( "bmp" )) return ImageFormat.Bmp;
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if (t.Equals( "png" )) return ImageFormat.Png;
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if (t.Equals( "jpg" )) return ImageFormat.Jpeg;
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if (t.Equals( "jpeg" )) return ImageFormat.Jpeg;
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if (t.Equals( "image/pjpeg")) return ImageFormat.Jpeg;
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if (t.Equals( "image/gif")) return ImageFormat.Gif;
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if (t.Equals( "image/bmp")) return ImageFormat.Bmp;
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if (t.Equals( "image/tiff")) return ImageFormat.Tiff;
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if (t.Equals( "image/x-icon")) return ImageFormat.Icon;
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if (t.Equals( "image/x-png")) return ImageFormat.Png;
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if (t.Equals( "image/png" )) return ImageFormat.Png;
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if (t.Equals( "image/x-emf")) return ImageFormat.Emf;
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if (t.Equals( "image/x-exif")) return ImageFormat.Exif;
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if (t.Equals( "image/x-wmf")) return ImageFormat.Wmf;
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return ImageFormat.MemoryBmp;
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}
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}
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}
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