public static void Resize(this Image source, String newFilename, Size newSize, long quality, ContentAlignment contentAlignment, ThumbMode mode)
{
Image image = source.Resize(newSize, quality, contentAlignment, mode);
using (EncoderParameters encoderParams = new EncoderParameters(1))
{
using (EncoderParameter parameter = (encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, quality)))
{
ImageCodecInfo encoder = null;
//取得擴展名
string ext = Path.GetExtension(newFilename);
if (string.IsNullOrEmpty(ext))
ext = ".jpg";
//根據擴展名得到解碼、編碼器
foreach (ImageCodecInfo codecInfo in ImageCodecInfo.GetImageEncoders())
{
if (Regex.IsMatch(codecInfo.FilenameExtension, string.Format(@"(;|^)\*\{0}(;|$)", ext), RegexOptions.IgnoreCase))
{
encoder = codecInfo;
break;
}
}
DirectoryInfo dir = new DirectoryInfo(Path.GetDirectoryName(newFilename));
if(dir.Exists == false) dir.Create();
image.Save(newFilename, encoder, encoderParams);
}
}
}
public static Image Resize(this Image source, Size newSize, long quality, ContentAlignment contentAlignment, ThumbMode mode)
{
//Reference: http://www.cnblogs.com/dao/archive/2008/02/24/1079571.html
if (newSize.IsEmpty || source.Size.IsEmpty) return source;
//先取一個寬比例。
double scale = (double)source.Width / (double)newSize.Width;
//縮略模式
switch (mode)
{
case ThumbMode.Full:
if (source.Height > source.Width)
scale = (double)source.Height / (double)newSize.Height;
break;
case ThumbMode.Max:
if (source.Height / scale < newSize.Height)
scale = (double)source.Height / (double)newSize.Height;
break;
}
SizeF newSzie = new SizeF((float)(source.Width / scale), (float)(source.Height / scale));
Bitmap newImage = new Bitmap(newSize.Width, newSize.Height);
if(!source.PropertyItems.IsNullOrEmpty())
{
foreach (PropertyItem propertyItem in source.PropertyItems)
{
newImage.SetPropertyItem(propertyItem);
}
}
using (Graphics g = Graphics.FromImage(newImage))
{
g.FillRectangle(Brushes.White, new Rectangle(new Point(0, 0), newSize));
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.CompositingMode = CompositingMode.SourceOver;
g.CompositingQuality = CompositingQuality.HighQuality;
g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
//對齊方式
RectangleF destRect;
switch (contentAlignment)
{
case ContentAlignment.TopCenter:
destRect = new RectangleF(new PointF(-(float)((newSzie.Width - newSize.Width) * 0.5), 0), newSzie);
break;
case ContentAlignment.TopRight:
destRect = new RectangleF(new PointF(-(float)(newSzie.Width - newSize.Width), 0), newSzie);
break;
case ContentAlignment.MiddleLeft:
destRect = new RectangleF(new PointF(0, -(float)((newSzie.Height - newSize.Height) * 0.5)), newSzie);
break;
case ContentAlignment.MiddleCenter:
destRect = new RectangleF(new PointF(-(float)((newSzie.Width - newSize.Width) * 0.5), -(float)((newSzie.Height - newSize.Height) * 0.5)), newSzie);
break;
case ContentAlignment.MiddleRight:
destRect = new RectangleF(new PointF(-(float)(newSzie.Width - newSize.Width), -(float)((newSzie.Height - newSize.Height) * 0.5)), newSzie);
break;
case ContentAlignment.BottomLeft:
destRect = new RectangleF(new PointF(0, -(float)(newSzie.Height - newSize.Height)), newSzie);
break;
case ContentAlignment.BottomCenter:
destRect = new RectangleF(new PointF(-(float)((newSzie.Width - newSize.Width) * 0.5), -(float)(newSzie.Height - newSize.Height)), newSzie);
break;
case ContentAlignment.BottomRight:
destRect = new RectangleF(new PointF(-(float)(newSzie.Width - newSize.Width), -(float)(newSzie.Height - newSize.Height)), newSzie);
break;
default:
destRect = new RectangleF(new PointF(0, 0), newSzie);
break;
}
g.DrawImage(source, destRect, new RectangleF(new PointF(0F, 0F), source.Size), GraphicsUnit.Pixel);
//source.Dispose();
}
return newImage;
}
public long MakeThumbnailPicAndReturnSize(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality,
out int realWidth, out int realHeight, IDictionary <int, string> exifInfos)
{
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
using (Image originalImage = Image.FromFile(originalImagePath, true))
{
if (exifInfos == null)
{
exifInfos = new Dictionary <int, string>();
try
{
ProcessExifInfo(originalImage, exifInfos);
}
catch
{
}
}
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case ThumbMode.NHW:
if (toheight > originalImage.Height && towidth > originalImage.Width)
{
towidth = originalImage.Width;
toheight = originalImage.Height;
}
else
{
if ((double)originalImage.Width / (double)towidth > (double)originalImage.Height / (double)toheight)
{
toheight = originalImage.Height * width / originalImage.Width;
}
else
{
towidth = originalImage.Width * height / originalImage.Height;
}
}
break;
case ThumbMode.HW:
break;
case ThumbMode.W:
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbMode.H:
towidth = originalImage.Width * height / originalImage.Height;
break;
case ThumbMode.Cut:
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}
realWidth = towidth;
realHeight = toheight;
//TODO:edit这里
if (_generater != null)
{
Logger.Debug("执行imagemagic");
_generater.Generater(new ThumbnailRequest
{
Height = toheight < 1 ? new int?() : toheight,
Width = realWidth,
ImageQuality = imageQuality,
OriginalImageFullName = originalImagePath,
SaveImageFullName = thumbnailPath,
ThumbMode = mode
});
return(new FileInfo(thumbnailPath).Length);
}
else
{
Logger.Debug("imagemagic = null");
}
using (Image bitmap = new System.Drawing.Bitmap(towidth, toheight))
{
var wrapMode = new ImageAttributes();
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
using (var g = System.Drawing.Graphics.FromImage(bitmap))
{
g.Clear(Color.White);
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight), x, y, ow, oh, GraphicsUnit.Pixel, wrapMode);
var encoderParms = new EncoderParameters(1);
encoderParms.Param[0] = new EncoderParameter(Encoder.Quality, imageQuality);
bitmap.Save(thumbnailPath, JpegFormat, encoderParms);
return(new FileInfo(thumbnailPath).Length);
}
}
}
}
public void MakeThumbnailPic(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality)
{
MakeThumbnailPicAndReturnSize(originalImagePath, thumbnailPath, width, height, mode, imageQuality);
}
public long MakeThumbnailPicAndReturnSize(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality)
{
int realHeight;
int realWidht;
IDictionary <int, string> exifs = new Dictionary <int, string>();
return(MakeThumbnailPicAndReturnSize(originalImagePath, thumbnailPath, width, height, mode, imageQuality, out realWidht, out realHeight, exifs));
}
public long MakeThumbnailPicAndReturnSize(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality,
out int realWidth, out int realHeight, IDictionary<int, string> exifInfos)
{
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
using (Image originalImage = Image.FromFile(originalImagePath, true))
{
if (exifInfos == null)
{
exifInfos = new Dictionary<int, string>();
try
{
ProcessExifInfo(originalImage, exifInfos);
}
catch
{
}
}
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case ThumbMode.NHW:
if (toheight > originalImage.Height && towidth > originalImage.Width)
{
towidth = originalImage.Width;
toheight = originalImage.Height;
}
else
{
if ((double)originalImage.Width / (double)towidth > (double)originalImage.Height / (double)toheight)
{
toheight = originalImage.Height * width / originalImage.Width;
}
else
{
towidth = originalImage.Width * height / originalImage.Height;
}
}
break;
case ThumbMode.HW:
break;
case ThumbMode.W:
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbMode.H:
towidth = originalImage.Width * height / originalImage.Height;
break;
case ThumbMode.Cut:
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}
realWidth = towidth;
realHeight = toheight;
//TODO:edit这里
if (_generater != null)
{
Logger.Debug("执行imagemagic");
_generater.Generater(new ThumbnailRequest
{
Height = toheight < 1 ? new int?() : toheight,
Width = realWidth,
ImageQuality = imageQuality,
OriginalImageFullName = originalImagePath,
SaveImageFullName = thumbnailPath,
ThumbMode = mode
});
return new FileInfo(thumbnailPath).Length;
}
else
{
Logger.Debug("imagemagic = null");
}
using (Image bitmap = new System.Drawing.Bitmap(towidth, toheight))
{
var wrapMode = new ImageAttributes();
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
using (var g = System.Drawing.Graphics.FromImage(bitmap))
{
g.Clear(Color.White);
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight), x, y, ow, oh, GraphicsUnit.Pixel, wrapMode);
var encoderParms = new EncoderParameters(1);
encoderParms.Param[0] = new EncoderParameter(Encoder.Quality, imageQuality);
bitmap.Save(thumbnailPath, JpegFormat, encoderParms);
return new FileInfo(thumbnailPath).Length;
}
}
}
}
/// <summary>
/// 加载配置文件
/// </summary>
/// <param name="filePath"></param>
private void LoadConfig(string filePath)
{
XmlDocument doc = new XmlDocument();
try
{
doc.Load(filePath);
}
catch
{
throw new Exception("无法加载配置文件。必须把配置文件upload.config存放在根目录的/Config文件夹中。");
}
XmlNode root = doc.SelectSingleNode("config/items");
if (root.ChildNodes != null)
{
ConfigItem item = null;
foreach (XmlNode node in root.ChildNodes)
{
if (node.NodeType == XmlNodeType.Element && node.LocalName == "item")
{
item = new ConfigItem();
///循环读取属性
XmlAttributeCollection attrs = node.Attributes;
if (attrs.Count > 0)
{
foreach (XmlAttribute attr in attrs)
{
if (attr.Name.ToLower() == "code")
{
item.Code = attr.Value;
}
if (attr.Name.ToLower() == "savepath")
{
item.SavePath = attr.Value;
}
if (attr.Name.ToLower() == "thumb")
{
item.Thumb = attr.Value;
List <ThumbMode> modeList = new List <ThumbMode>();
string[] list = item.Thumb.Split('|');
for (int i = 0, len = list.Length; i < len; i++)
{
string[] thumb = list[i].Split(',');
ThumbMode mode = new ThumbMode();
mode.Mode = thumb[0];
mode.Width = int.Parse(thumb[1]);
mode.Height = int.Parse(thumb[2]);
if (thumb.Length > 3)
{
mode.IsDraw = int.Parse(thumb[3]);
}
modeList.Add(mode);
}
item.ModeList = modeList;
}
if (attr.Name.ToLower() == "desc")
{
item.Description = attr.Value;
}
}
cList.Add(item);
}
}
}
}
}
public long MakeThumbnailPicAndReturnSize(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality)
{
int realHeight;
int realWidht;
IDictionary<int, string> exifs = new Dictionary<int, string>();
return MakeThumbnailPicAndReturnSize(originalImagePath, thumbnailPath, width, height, mode, imageQuality, out realWidht, out realHeight, exifs);
}
public void MakeThumbnailPic(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, int imageQuality)
{
MakeThumbnailPicAndReturnSize(originalImagePath, thumbnailPath, width, height, mode, imageQuality);
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="sourceImagePath">源图路径（带文件名的完整物理路径）</param>
/// <param name="thumbImagePath">缩略图路径（带文件名的完整物理路径）</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="thumbMode">生成缩略图的方式</param>
public static void MakeThumb(string sourceImagePath, string thumbImagePath, int width, int height, ThumbMode thumbMode)
{
if (string.IsNullOrEmpty(sourceImagePath))
{
throw new SourceImagePathIsNullOrEmptyException();
}
if (!File.Exists(sourceImagePath))
{
throw new SourceFileNotExistException();
}
if (string.IsNullOrEmpty(thumbImagePath))
{
throw new ThumbImagePathIsNullOrEmptyException();
}
string directory = Path.GetDirectoryName(thumbImagePath);
if (!Directory.Exists(directory))
{
throw new ThumbImagePathNotExistException();
}
try
{
using (Image sourceImage = Image.FromFile(sourceImagePath))
{
if (width <= 0 && width >= sourceImage.Width)
{
throw new ThumbImageWidthIsErrorException();
}
if (height <= 0 && height >= sourceImage.Height)
{
throw new ThumbImageHeigthIsErrorException();
}
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = sourceImage.Width;
int oh = sourceImage.Height;
switch (thumbMode)
{
case ThumbMode.HW: //指定高宽缩放（不变形）
int tempheight = sourceImage.Height * width / sourceImage.Width;
if (tempheight > height)
{
towidth = sourceImage.Width * height / sourceImage.Height;
}
else
{
toheight = sourceImage.Height * width / sourceImage.Width;
}
break;
case ThumbMode.W: //指定宽，高按比例
toheight = sourceImage.Height * width / sourceImage.Width;
break;
case ThumbMode.H: //指定高，宽按比例
towidth = sourceImage.Width * height / sourceImage.Height;
break;
case ThumbMode.CUT: //指定高宽裁减（不变形）
if ((double)sourceImage.Width / (double)sourceImage.Height > (double)towidth / (double)toheight)
{
oh = sourceImage.Height;
ow = sourceImage.Height * towidth / toheight;
y = 0;
x = (sourceImage.Width - ow) / 2;
}
else
{
ow = sourceImage.Width;
oh = sourceImage.Width * height / towidth;
x = 0;
y = (sourceImage.Height - oh) / 2;
}
break;
}
//新建一个bmp图片
using (Image bitmap = new Bitmap(towidth, toheight))
{
//新建一个画板
using (Graphics g = Graphics.FromImage(bitmap))
{
//设置高质量插值法
g.InterpolationMode = InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(sourceImage, new Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
}
//验证缩略图的保存路径是否带有文件名,如果没有带文件名则用 thumb_原文件名
if (!Regex.IsMatch(thumbImagePath, @"[^\\\/:\*\?""<>\|]+\.[^\\\/:\*\?""<>\|]+$", RegexOptions.Compiled))
{
thumbImagePath = thumbImagePath + "thumb_" + sourceImagePath.Remove(0, sourceImagePath.LastIndexOf(@"\") + 1);
}
//以源文件相同的格式保存缩略图
bitmap.Save(thumbImagePath, sourceImage.RawFormat);
}
}
}
catch (OutOfMemoryException)
{
throw new SourceFileIsNotImageException();
}
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="sourceImagePath">源图路径（带文件名的完整物理路径）</param>
/// <param name="thumbImagePath">缩略图路径（带文件名的完整物理路径）</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="thumbMode">生成缩略图的方式</param>
public static void MakeThumb(string sourceImagePath, string thumbImagePath, int width, int height, ThumbMode thumbMode)
{
if (string.IsNullOrEmpty(sourceImagePath))
{
throw new SourceImagePathIsNullOrEmptyException();
}
if (!File.Exists(sourceImagePath))
{
throw new SourceFileNotExistException();
}
if (string.IsNullOrEmpty(thumbImagePath))
{
throw new ThumbImagePathIsNullOrEmptyException();
}
string directory = Path.GetDirectoryName(thumbImagePath);
if (!Directory.Exists(directory))
{
throw new ThumbImagePathNotExistException();
}
try
{
using (Image sourceImage = Image.FromFile(sourceImagePath))
{
if (width <= 0 && width >= sourceImage.Width)
{
throw new ThumbImageWidthIsErrorException();
}
if (height <= 0 && height >= sourceImage.Height)
{
throw new ThumbImageHeigthIsErrorException();
}
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = sourceImage.Width;
int oh = sourceImage.Height;
switch (thumbMode)
{
case ThumbMode.HW://指定高宽缩放（不变形）
int tempheight = sourceImage.Height * width / sourceImage.Width;
if (tempheight > height)
{
towidth = sourceImage.Width * height / sourceImage.Height;
}
else
{
toheight = sourceImage.Height * width / sourceImage.Width;
}
break;
case ThumbMode.W://指定宽，高按比例
toheight = sourceImage.Height * width / sourceImage.Width;
break;
case ThumbMode.H://指定高，宽按比例
towidth = sourceImage.Width * height / sourceImage.Height;
break;
case ThumbMode.CUT://指定高宽裁减（不变形）
if ((double)sourceImage.Width / (double)sourceImage.Height > (double)towidth / (double)toheight)
{
oh = sourceImage.Height;
ow = sourceImage.Height * towidth / toheight;
y = 0;
x = (sourceImage.Width - ow) / 2;
}
else
{
ow = sourceImage.Width;
oh = sourceImage.Width * height / towidth;
x = 0;
y = (sourceImage.Height - oh) / 2;
}
break;
}
//新建一个bmp图片
using (Image bitmap = new Bitmap(towidth, toheight))
{
//新建一个画板
using (Graphics g = Graphics.FromImage(bitmap))
{
//设置高质量插值法
g.InterpolationMode = InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(sourceImage, new Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
}
//验证缩略图的保存路径是否带有文件名,如果没有带文件名则用 thumb_原文件名
if (!Regex.IsMatch(thumbImagePath, @"[^\\\/:\*\?""<>\|]+\.[^\\\/:\*\?""<>\|]+$", RegexOptions.Compiled))
{
thumbImagePath = thumbImagePath + "thumb_" + sourceImagePath.Remove(0, sourceImagePath.LastIndexOf(@"\") + 1);
}
//以源文件相同的格式保存缩略图
bitmap.Save(thumbImagePath, sourceImage.RawFormat);
}
}
}
catch (OutOfMemoryException)
{
throw new SourceFileIsNotImageException();
}
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径（物理路径）</param>
/// <param name="thumbnailPath">缩略图路径（物理路径）</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
/// <param name="DeleteOld">是否删除源文件</param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, ThumbMode mode, bool DeleteOld)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode.ToString())
{
case "HW": //指定高宽缩放（可能变形）
break;
case "W": //指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case "H": //指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case "Cut": //指定高宽裁减（不变形）
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(System.Drawing.Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
new System.Drawing.Rectangle(x, y, ow, oh),
System.Drawing.GraphicsUnit.Pixel);
try
{
originalImage.Dispose();
g.Dispose();
if (DeleteOld)
{
FileInfo fi = new FileInfo(originalImagePath);
fi.Delete();
}
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(bitmap);
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
bitmap.Dispose();
}
}