public static Bitmap DrawThumbnail(Image originalImage, ThumbnailType tt, int width, int height)
{
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (tt)
{
case ThumbnailType.ScalingByBoth://指定高宽缩放（可能变形）
break;
case ThumbnailType.GeometricScalingByWidth://指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.GeometricScalingByHeight://指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
default://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;
}
//新建一个bmp图片
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
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(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 Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
return bitmap;
}
public static string Make(string sourcedir,string targetdir, string originalName,int width,int height,ThumbnailType type)
{
string thumbnailName = Path.GetFileNameWithoutExtension(originalName) + "_" + width + "-" + height + Path.GetExtension(originalName);
string thumbnailPath = targetdir + width + "_" + height + "\\";
string thumbnailFullName = thumbnailPath + thumbnailName;
NLibrary.IOHelper.EnsureFileDirectory(thumbnailPath);
if (!File.Exists(thumbnailFullName))
{
MakeThumbnail(sourcedir + originalName, thumbnailFullName, type, width, height);
}
return thumbnailFullName;
}
private static void saveAvatarPrivate( int x, int y, String srcPath, ThumbnailType ttype )
{
String thumbPath = Img.GetThumbPath( srcPath, ttype );
Image img = Image.FromFile( srcPath );
if (img.Size.Width <= x && img.Size.Height <= y) {
File.Copy( srcPath, thumbPath );
}
else {
Img.SaveThumbnail( srcPath, thumbPath, x, y, SaveThumbnailMode.Cut );
}
}
public ActionResult Thumbnail(string thumbnail, ThumbnailType type)
{
var responseHeaders = Response.GetTypedHeaders();
responseHeaders.CacheControl = new Microsoft.Net.Http.Headers.CacheControlHeaderValue
{
MaxAge = TimeSpan.FromDays(300)
};
var file = _thumbnailCacheService.GetThumbnail(thumbnail, type);
string contentType = null;
if (!_contentTypeProvider.TryGetContentType(file, out contentType))
throw new Exception("Can't get content type for " + file);
return PhysicalFile(file, contentType);
}
/// <summary>
/// 删除图片以及指定类型的缩略图。如果图片不存在，则忽略
/// </summary>
/// <param name="srcPath">相对网址</param>
/// <param name="arrThumbType">多个缩略图类型</param>
public static void DeleteImgAndThumb( String srcPath, ThumbnailType[] arrThumbType )
{
if (strUtil.IsNullOrEmpty( srcPath )) return;
if (srcPath.ToLower().StartsWith( "http://" )) return;
String path = PathHelper.Map( srcPath );
if (file.Exists( path ))
wojilu.IO.File.Delete( path );
foreach (ThumbnailType ttype in arrThumbType) {
String pathThumb = PathHelper.Map( GetThumbPath( srcPath, ttype ) );
if (file.Exists( pathThumb ))
wojilu.IO.File.Delete( pathThumb );
}
}
public Thumbnail(byte[] thumbnail,ThumbnailType type)
{
thumbType = type;
Stream stream = new MemoryStream(thumbnail);
FileReader reader = new FileReader(stream);
reader.ReadBytes(4);//skip Tag 'THUM'
width = (int)(reader.ReadUInt32());
height = (int)(reader.ReadUInt32());
byte[] readBytes = reader.ReadBytes(thumbnail.Length-12);
pngBytes = new byte[readBytes.Length];
readBytes.CopyTo(pngBytes, 0);
stream.Close();
reader.Close();
}
/// <summary>
/// 根据主题id得到缩略图附件对象
/// </summary>
/// <param name="tid">主题id</param>
/// <param name="maxsize">最大图片尺寸</param>
/// <param name="type">缩略图类型</param>
/// <returns>缩略图附件对象</returns>
public static AttachmentInfo GetThumbnailAttachByTid(int tid, int maxsize, ThumbnailType type)
{
int theMaxsize = 300;
if (maxsize < theMaxsize)
{
theMaxsize = maxsize;
}
string attCachePath = string.Format("{0}cache/thumbnail/t_{1}_{2}_{3}.jpg", "/", tid, theMaxsize, (int)type);
AttachmentInfo attach = GetFirstImageAttachByTid(tid);
if (attach == null)
{
return(null);
}
attach.Attachment = attCachePath;
string attPhyCachePath = Utils.GetMapPath(attCachePath);
if (!File.Exists(attPhyCachePath))
{
CreateTopicAttThumbnail(attPhyCachePath, type, Utils.GetMapPath(attach.Filename), theMaxsize);
}
return(attach);
}
public ThumbnailViewModel(string id, string title, string imageUrl, string description, string releaseDate, ThumbnailType type)
{
this.Id = id;
this.Title = title;
this.ImageUrl = imageUrl;
this.Description = description;
this.ReleaseDate = releaseDate;
this.Runtime = Runtime;
this.Type = type;
}
public static void CreateThumbnail(ThumbnailType thumbnailType, string source, string dest, int thumbWidth, int thumbHeight, Brush backgroundBrush)
{
Bitmap sourceImage = new Bitmap(source);
// Save thumbnail and output it onto the webpage
int originalWidth = sourceImage.Width;
int originalHeight = sourceImage.Height;
int finalWidth = thumbWidth;
int finalHeight = thumbHeight;
CalculateRatio(originalWidth, originalHeight, ref thumbWidth, ref thumbHeight);
int xPos = 0;
int yPos = 0;
if (thumbnailType == ThumbnailType.Boxed)
{
xPos = (finalWidth - thumbWidth) / 2;
yPos = (finalHeight - thumbHeight) / 2;
}
else
{
finalWidth = thumbWidth;
finalHeight = thumbHeight;
}
Bitmap thumbImage = new Bitmap(finalWidth, finalHeight);
Graphics g = Graphics.FromImage(thumbImage);
g.FillRectangle(backgroundBrush, new Rectangle(0, 0, finalWidth, finalHeight));
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(sourceImage, xPos, yPos, thumbWidth, thumbHeight);
thumbImage.Save(dest, System.Drawing.Imaging.ImageFormat.Jpeg);
thumbImage.Dispose();
sourceImage.Dispose();
}
private static void MakeThumbnail(string originalImagePath,string thumbnailPath, ThumbnailType tt, int width, int height)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
Bitmap bitmap = DrawThumbnail(originalImage, tt, width, height);
try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
//bitmap. g.Dispose();
}
}
/// <summary>
/// 生成缩略图 (按比例缩小图片)
/// </summary>
/// <param name="sourcePath">源图片</param>
/// <param name="outPath">缩略图</param>
/// <param name="intWidth">图片宽带</param>
/// <param name="intHeight">图片高度</param>
/// <param name="type"></param>
/// <returns></returns>
public static bool GenerateThumbnail(string sourcePath, string outPath, int intWidth, int intHeight, ThumbnailType type)
{
if (type == ThumbnailType.Zoom)
{
return(GenerateThumbnail1(sourcePath, outPath, intWidth, intHeight));
}
if (type == ThumbnailType.NotProportional)
{
return(GenerateThumbnail2(sourcePath, outPath, intWidth, intHeight));
}
if (type == ThumbnailType.Cut)
{
return(GenerateThumbnail3(sourcePath, outPath, intWidth, intHeight));
}
return(false);
}
public bool SaveFile(Stream fileStream, string fileName, bool isPublic, out StorageFile outStorageFile, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = false, object extensionConfig = null)
{
Argument.ThrowIfNullOrEmpty(fileName, "文件名");
outStorageFile = null;
try
{
var fileSize = fileStream.Length;
if (fileSize > 0)
{
var fileId = KeyGenerator.GetGuidKey();
string relativePath;
var savePath = GetFolderPath(out relativePath);
relativePath = relativePath.Replace("\\", "/");
var fileExtension = Path.GetExtension(fileName)?.ToLower();
var fileType = fileName.GetFileType();
int imageWidth = 0, imageHeight = 0;
//保存到文件
var path = $"{savePath}\\{fileId}{fileExtension}";
if (fileType == FileType.Image)
{
//取长宽
System.Drawing.Image tempimage = System.Drawing.Image.FromStream(fileStream, true);
imageWidth = tempimage.Width; //宽
imageHeight = tempimage.Height; //高
tempimage.Save(path);
}
else
{
fileStream.Position = 0;
StreamWriter sw = new StreamWriter(path);
fileStream.CopyTo(sw.BaseStream);
sw.Flush();
sw.Close();
fileStream.Dispose();
}
var storageFile = new StorageFile
{
Id = fileId,
FileName = fileName,
FileExtension = fileExtension,
FileSize = fileSize.Kb(),
RelativePath = $"{relativePath}/{fileId}{fileExtension}",
CreateTime = DateTime.Now,
FileType = fileType,
Width = imageWidth,
Height = imageHeight,
IsPublic = isPublic,
ExtensionConfig = extensionConfig?.ToJson()
};
//生成缩略图，添加水印
if (fileType == FileType.Image)
{
WaterMark waterMarkConfig = null;
//添加水印
if (waterMark)
{
waterMarkConfig = _configService.Get <SystemConfig>().WaterMark;
}
mediumThumbnailWidth = mediumThumbnailWidth ?? MediumThumbnailWidth;
mediumThumbnailHeight = mediumThumbnailHeight ?? MediumThumbnailHeight;
storageFile.MediumThumbnail = storageFile.RelativePath.GetThumbnail(mediumThumbnailWidth.Value, mediumThumbnailHeight.Value, thumbnailType, waterMarkConfig);
smallThumbnailWidth = smallThumbnailWidth ?? SmallThumbnailWidth;
smallThumbnailHeight = smallThumbnailHeight ?? SmallThumbnailHeight;
storageFile.SmallThumbnail = storageFile.RelativePath.GetThumbnail(smallThumbnailWidth.Value, smallThumbnailHeight.Value, thumbnailType, waterMarkConfig);
storageFile.RelativePath.BuildWaterMark(waterMarkConfig);
}
var success = _currencyService.Create(storageFile);
if (success)
{
outStorageFile = storageFile;
Logger.Operation($"添加文件：{fileName}", SystemSettingsModule.Instance);
}
return(success);
}
return(false);
}
catch (Exception ex)
{
Logger.Error(ex, "上传文件出错");
return(false);
}
}
/// <summary>
/// 保存上传的图片
/// </summary>
/// <param name="postedFile"></param>
/// <param name="arrThumbType"></param>
/// <returns></returns>
public static Result SaveImg( HttpFile postedFile, ThumbnailType[] arrThumbType )
{
Result result = new Result();
checkUploadPic( postedFile, result );
if (result.HasErrors) {
logger.Info( result.ErrorsText );
return result;
}
String pathName = PathHelper.Map( sys.Path.DiskPhoto );
String photoName = Img.GetPhotoName( pathName, postedFile.ContentType );
String filename = Path.Combine( pathName, photoName );
try {
postedFile.SaveAs( filename );
foreach (ThumbnailType ttype in arrThumbType) {
saveThumbSmall( filename, ttype );
}
}
catch (Exception exception) {
logger.Error( lang.get( "exPhotoUploadError" ) + ":" + exception.Message );
result.Add( lang.get( "exPhotoUploadErrorTip" ) );
return result;
}
result.Info = photoName.Replace( @"\", "/" );
return result;
}
public ActionResult SimpleUploadPartial(string controlId, string moduleKey, string sourceType, int?maxFilesize, string acceptedFiles, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, FileType?fileType = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool?waterMark = false, UploadPartialType uploadType = UploadPartialType.Both)
{
Argument.ThrowIfNullOrEmpty(controlId, "controlId");
if (maxFilesize == null || maxFilesize == 0)
{
maxFilesize = 4;
}
if (string.IsNullOrWhiteSpace(acceptedFiles))
{
acceptedFiles = ".bmp,.jpg,.jpeg,.gif,.png";
}
ViewBag.ControlId = controlId;
ViewBag.IsPublic = true;
ViewBag.MaxFiles = 1;
ViewBag.MaxFilesize = maxFilesize;
ViewBag.AcceptedFiles = acceptedFiles;
ViewBag.AutoProcessQueue = true;
ViewBag.FileType = fileType;
ViewBag.WaterMark = waterMark;
ViewBag.UploadType = uploadType;
ViewBag.MediumThumbnailWidth = mediumThumbnailWidth;
ViewBag.MediumThumbnailHeight = mediumThumbnailHeight;
ViewBag.SmallThumbnailWidth = smallThumbnailWidth;
ViewBag.SmallThumbnailHeight = smallThumbnailHeight;
ViewBag.ThumbnailType = thumbnailType;
return(PartialView("_PartialSimpleUpload"));
}
public static void MakeThumbnailImage(string bigImage, string smallImage, int imageWidth, int imageHeight, ThumbnailType thumbnailType)
{
if (File.Exists(bigImage))
{
try
{
DirectoryInfo info = new DirectoryInfo(smallImage.Substring(0, smallImage.LastIndexOf(@"\")) + @"\");
if (!info.Exists)
{
info.Create();
}
}
catch
{
}
using (Image image = Image.FromFile(bigImage))
{
switch (thumbnailType)
{
case ThumbnailType.WidthFix:
imageHeight = Convert.ToInt32((double)((Convert.ToDouble(image.Height) * Convert.ToDouble(imageWidth)) / Convert.ToDouble(image.Width)));
goto Label_01C9;
case ThumbnailType.HeightFix:
imageWidth = Convert.ToInt32((double)((Convert.ToDouble(image.Width) * Convert.ToDouble(imageHeight)) / Convert.ToDouble(image.Height)));
goto Label_01C9;
case ThumbnailType.InBox:
if ((Convert.ToDouble(image.Width) / ((double)image.Height)) >= (Convert.ToDouble(imageWidth) / ((double)imageHeight)))
{
imageHeight = Convert.ToInt32((double)((Convert.ToDouble(image.Height) * Convert.ToDouble(imageWidth)) / Convert.ToDouble(image.Width)));
}
else
{
imageWidth = Convert.ToInt32((double)((Convert.ToDouble(image.Width) * Convert.ToDouble(imageHeight)) / Convert.ToDouble(image.Height)));
}
goto Label_01C9;
case ThumbnailType.OutBox:
if ((Convert.ToDouble(image.Width) / ((double)image.Height)) < (Convert.ToDouble(imageWidth) / ((double)imageHeight)))
{
break;
}
imageWidth = Convert.ToInt32((double)((Convert.ToDouble(image.Width) * Convert.ToDouble(imageHeight)) / Convert.ToDouble(image.Height)));
goto Label_01C9;
default:
goto Label_01C9;
}
imageHeight = Convert.ToInt32((double)((Convert.ToDouble(image.Height) * Convert.ToDouble(imageWidth)) / Convert.ToDouble(image.Width)));
Label_01C9:
using (Bitmap bitmap = new Bitmap(imageWidth, imageHeight))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.InterpolationMode = InterpolationMode.High;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.Clear(Color.White);
graphics.DrawImage(image, new Rectangle(0, 0, imageWidth, imageHeight), new Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel);
ImageCodecInfo[] imageEncoders = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo encoder = null;
foreach (ImageCodecInfo info3 in imageEncoders)
{
if (info3.MimeType == "image/jpeg")
{
encoder = info3;
}
}
EncoderParameters encoderParams = new EncoderParameters();
encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, ((long)100));
bitmap.Save(smallImage, encoder, encoderParams);
}
return;
}
}
}
}
public ActionResult UploadedBase64Image(string fileName, string data, bool?isPublic, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = false)
{
var result = new DataJsonResult();
if (string.IsNullOrWhiteSpace(fileName))
{
result.ErrorMessage = "图片文件名为空";
return(Json(result));
}
if (string.IsNullOrWhiteSpace(data))
{
result.ErrorMessage = "图片数据为空";
return(Json(result));
}
if (string.IsNullOrWhiteSpace(Path.GetExtension(fileName)))
{
result.ErrorMessage = "文件名称没有包含扩展名";
return(Json(result));
}
StorageFile storageFile;
if (!_fileService.SaveFile(data, fileName, isPublic ?? true, out storageFile, mediumThumbnailWidth, mediumThumbnailHeight, smallThumbnailWidth, smallThumbnailHeight, thumbnailType, waterMark))
{
result.ErrorMessage = "文件名称没有包含扩展名";
return(Json(result));
}
result.Data = storageFile.Simplified();
return(Json(result));
}
public ActionResult UploadPartial(string controlId, Guid?sourceId, string moduleKey, string sourceType, bool?isPublic, int?maxFiles, int?maxFilesize, string acceptedFiles, string defaultValue = "", int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, bool?autoProcessQueue = true, bool?editMode = true, FileType?fileType = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool?waterMark = false, UploadPartialType uploadType = UploadPartialType.Both)
{
Argument.ThrowIfNullOrEmpty(controlId, "controlId");
if (maxFiles == null || maxFiles == 0)
{
maxFiles = 1;
}
if (maxFilesize == null || maxFilesize == 0)
{
maxFilesize = 4;
}
if (isPublic == null)
{
isPublic = true;
}
if (string.IsNullOrWhiteSpace(acceptedFiles))
{
acceptedFiles = ".bmp,.jpg,.jpeg,.gif,.png";
}
if (autoProcessQueue == null)
{
autoProcessQueue = true;
}
ViewBag.ControlId = controlId;
ViewBag.IsPublic = isPublic;
ViewBag.MaxFiles = maxFiles;
ViewBag.MaxFilesize = maxFilesize;
ViewBag.AcceptedFiles = acceptedFiles;
ViewBag.AutoProcessQueue = autoProcessQueue;
ViewBag.DefaultValue = defaultValue;
ViewBag.EditMode = editMode;
ViewBag.FileType = fileType;
ViewBag.WaterMark = waterMark;
ViewBag.UploadType = uploadType;
ViewBag.MediumThumbnailWidth = mediumThumbnailWidth;
ViewBag.MediumThumbnailHeight = mediumThumbnailHeight;
ViewBag.SmallThumbnailWidth = smallThumbnailWidth;
ViewBag.SmallThumbnailHeight = smallThumbnailHeight;
ViewBag.ThumbnailType = thumbnailType;
if (sourceId != null)
{
var currentFiles = _storageFileService.GetFiles(sourceId.Value, moduleKey, sourceType);
ViewBag.DefaultValue = string.Join(",", currentFiles.Distinct().Select(f => f.Id));
ViewBag.CurrentFiles = currentFiles;
}
return(PartialView("_PartialUpload"));
}
private static void CreateTopicAttThumbnail(string attPhyCachePath, ThumbnailType type, string attPhyPath, int theMaxsize)
{
if (!attPhyPath.StartsWith("http://"))
{
attPhyPath = Utils.GetMapPath(attPhyPath);
}
if (!attPhyPath.StartsWith("http://") && !File.Exists(attPhyPath))
{
return;
}
string mapPath = Utils.GetMapPath(BaseConfigs.GetForumPath + "cache/thumbnail/");
if (!Directory.Exists(mapPath))
{
try
{
Utils.CreateDir(mapPath);
}
catch
{
throw new Exception("请检查程序目录下cache文件夹的用户权限！");
}
}
FileInfo[] files = new DirectoryInfo(mapPath).GetFiles();
if (files.Length > 1500)
{
Attachments.QuickSort(files, 0, files.Length - 1);
for (int i = files.Length - 1; i >= 1400; i--)
{
try
{
files[i].Delete();
}
catch
{
}
}
}
try
{
switch (type)
{
case ThumbnailType.Square:
if (attPhyPath.StartsWith("http://"))
{
Thumbnail.MakeRemoteSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
}
else
{
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
}
break;
case ThumbnailType.Thumbnail:
if (attPhyPath.StartsWith("http://"))
{
Thumbnail.MakeRemoteThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
}
else
{
Thumbnail.MakeThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
}
break;
default:
if (attPhyPath.StartsWith("http://"))
{
Thumbnail.MakeRemoteSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
}
else
{
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
}
break;
}
}
catch
{
}
}
public static string Thumbnail(this IUrlHelper urlHelper, string thumb, ThumbnailType type)
{
return(urlHelper.RouteUrl("Thumbnail", new { thumbnail = thumb, type }));
}
public string GetThumbnail(string thumbnail, ThumbnailType type)
{
var possible = Path.Combine(_thumbnailCacheDirectory, type.ToString(), thumbnail);
if (File.Exists(possible))
{
return(possible);
}
// TODO: global sync lock?
using (var imageStream = _postThumbnailService.GetImage(thumbnail))
{
switch (type)
{
case ThumbnailType.Full:
using (var fileStream = File.OpenWrite(possible))
imageStream.CopyTo(fileStream);
break;
case ThumbnailType.Post:
using (var image = Image.FromStream(imageStream))
{
var instructions = new Instructions("width=70&height=70&scale=both")
{
Width = 70,
Height = 70,
Scale = ScaleMode.Both
};
// we want horizontally long images to have no padding. simply render the images with a max width.
// for vertically long images, we want to fill the entire canvas area with no black space on the sides.
var ratio = image.Width / (double)image.Height;
if (ratio >= 1.5)
{
// the image is REALLY wide, so, let's just fill, cropping the ends.
instructions.Mode = FitMode.Crop;
}
else if (ratio >= 1)
{
// the image is wide
instructions.Mode = FitMode.Max;
}
else
{
// the image is tall
instructions.Mode = FitMode.Crop;
}
ImageBuilder.Current.Build(new ImageJob()
{
Source = image,
Dest = possible,
Instructions = instructions
});
}
break;
default:
throw new Exception("unknown type");
}
}
return(possible);
}
private bool picExist( string userPic, ThumbnailType ttype )
{
String srcPath = getSrcPath( userPic );
String thumbPath = Img.GetThumbPath( srcPath, ttype );
return file.Exists( thumbPath );
}
public ActionResult SaveUploadedFile(bool?isPublic, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = false)
{
if (isPublic == null)
{
isPublic = true;
}
var result = new DataJsonResult();
//虽然是循环，其实一次只会提交一个文件
foreach (string fileName in Request.Files)
{
HttpPostedFileBase file = Request.Files[fileName];
StorageFile storageFile;
result.Success = _fileService.SaveFile(file, isPublic.Value, out storageFile, mediumThumbnailWidth, mediumThumbnailHeight, smallThumbnailWidth, smallThumbnailHeight, thumbnailType, waterMark);
if (result.Success)
{
result.Data = storageFile;
break;
}
}
return(Json(result));
}
public String GetPhotoThumb( String relativeUrl, ThumbnailType ttype )
{
return wojilu.Drawing.Img.GetThumbPath( GetPhotoOriginal( relativeUrl ), ttype );
}
public ActionResult UploadedFileKindEdit(bool?isPublic, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = true)
{
if (isPublic == null)
{
isPublic = true;
}
var result = new DataJsonResult();
HttpPostedFileBase file = Request.Files[0];
StorageFile storageFile;
result.Success = _fileService.SaveFile(file, isPublic.Value, out storageFile, mediumThumbnailWidth, mediumThumbnailHeight, smallThumbnailWidth, smallThumbnailHeight, thumbnailType, waterMark);
if (result.Success)
{
return(Json(new { error = 0, url = "/" + storageFile.RelativePath }));
}
return(Json(new { error = 1, message = "上传失败" }));
}
public bool SaveFile(HttpPostedFileBase file, bool isPublic, out StorageFile outStorageFile, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = false, object extensionConfig = null)
{
return(SaveFile(file.InputStream, file.FileName, isPublic, out outStorageFile, mediumThumbnailWidth,
mediumThumbnailHeight, smallThumbnailWidth, smallThumbnailHeight, thumbnailType, waterMark, extensionConfig));
}
public string GetThumbnail(string thumbnail, ThumbnailType type)
{
var possible = Path.Combine(_thumbnailCacheDirectory, type.ToString(), thumbnail);
if (File.Exists(possible))
return possible;
// TODO: global sync lock?
using (var imageStream = _postThumbnailService.GetImage(thumbnail))
{
switch (type)
{
case ThumbnailType.Full:
using (var fileStream = File.OpenWrite(possible))
imageStream.CopyTo(fileStream);
break;
case ThumbnailType.Post:
using (var image = Image.FromStream(imageStream))
{
var instructions = new Instructions("width=70&height=70&scale=both")
{
Width = 70,
Height = 70,
Scale = ScaleMode.Both
};
// we want horizontally long images to have no padding. simply render the images with a max width.
// for vertically long images, we want to fill the entire canvas area with no black space on the sides.
var ratio = image.Width / (double)image.Height;
if (ratio >= 1.5)
{
// the image is REALLY wide, so, let's just fill, cropping the ends.
instructions.Mode = FitMode.Crop;
}
else if (ratio >= 1)
{
// the image is wide
instructions.Mode = FitMode.Max;
}
else
{
// the image is tall
instructions.Mode = FitMode.Crop;
}
ImageBuilder.Current.Build(new ImageJob()
{
Source = image,
Dest = possible,
Instructions = instructions
});
}
break;
default:
throw new Exception("unknown type");
}
}
return possible;
}
/// <summary>
/// 绑定附件数组中的参数，返回新上传的附件个数
/// </summary>
/// <param name="attachmentInfo">附件类型</param>
/// <param name="postId">帖子id</param>
/// <param name="msg">原有提示信息</param>
/// <param name="topicId">主题id</param>
/// <param name="userId">用户id</param>
/// <returns>无效附件个数</returns>
//public static int BindAttachment(AttachmentInfo[] attachmentInfo, int postId, StringBuilder msg, int topicId, int userId, UserGroupInfo userGroupInfo, out int newAttachmentCount)
//{
// //int acount = attachmentInfo.Length;
// // 附件查看权限
// string[] readperm = String.IsNullOrEmpty(DNTRequest.GetString("readperm")) ? null : DNTRequest.GetString("readperm").Split(',');
// string[] attachdesc = DNTRequest.GetString("attachdesc") == null ? null : DNTRequest.GetString("attachdesc").Split(',');
// string[] localid = DNTRequest.GetString("localid") == null ? null : DNTRequest.GetString("localid").Split(',');
// string[] attachprice = DNTRequest.GetString("attachprice") == null ? null : DNTRequest.GetString("attachprice").Split(',');
// //设置无效附件计数器，将在下面UserCreditsFactory.UpdateUserCreditsByUploadAttachment方法中减去该计数器的值
// int errorAttachment = 0;
// int i_readperm = 0;
// newAttachmentCount = 0;
// for (int i = 0; i < attachmentInfo.Length; i++)
// {
// if (attachmentInfo[i] != null)
// {
// if (attachmentInfo[i].Pid == 0)
// newAttachmentCount++;
// attachmentInfo[i].Uid = userId;
// attachmentInfo[i].Tid = topicId;
// attachmentInfo[i].Pid = postId;
// attachmentInfo[i].Postdatetime = Utils.GetDateTime();
// attachmentInfo[i].Readperm = 0;
// attachmentInfo[i].Attachprice = attachprice != null ? UserGroups.CheckUserGroupMaxPrice(userGroupInfo, Utils.StrToInt(attachprice[i], 0)) : 0;
// if (readperm != null)
// {
// i_readperm = Utils.StrToInt(readperm[i], 0);
// //当为最大阅读仅限(255)时
// i_readperm = i_readperm > 255 ? 255 : i_readperm;
// attachmentInfo[i].Readperm = i_readperm;
// }
// if (attachdesc != null && !attachdesc[i].Equals(""))
// attachmentInfo[i].Description = Utils.HtmlEncode(attachdesc[i]);
// //if (!attachmentInfo[i].Sys_noupload.Equals(""))
// //{
// // msg.AppendFormat("<tr><td align=\"left\">{0}</td>", attachmentInfo[i].Attachment);
// // msg.AppendFormat("<td align=\"left\">{0}</td></tr>", attachmentInfo[i].Sys_noupload);
// // errorAttachment++;
// //}
// }
// }
// //如果有上传错误的，则减去错误的个数
// newAttachmentCount -= errorAttachment;
// return errorAttachment;
//}
/// <summary>
/// 根据主题id得到缩略图附件对象
/// </summary>
/// <param name="tid">主题id</param>
/// <param name="maxsize">最大图片尺寸</param>
/// <param name="type">缩略图类型</param>
/// <returns>缩略图附件对象</returns>
public static string GetThumbnailByTid(int tid, int maxsize, ThumbnailType type)
{
int theMaxsize = maxsize < 300 ? maxsize : 300;
string attCachePath = string.Format("{0}cache/thumbnail/t_{1}_{2}_{3}.jpg", BaseConfigs.GetForumPath, tid, theMaxsize, (int)type);
AttachmentInfo attach = Discuz.Data.Attachments.GetFirstImageAttachByTid(tid);
if (attach == null)
return null;
attach.Attachment = attCachePath;
string attPhyCachePath = Utils.GetMapPath(attCachePath);
if (!File.Exists(attPhyCachePath))
{
CreateTopicAttThumbnail(attPhyCachePath, type, attach.Filename, theMaxsize);
}
return attCachePath;
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImage">原图</param>
/// <param name="thumNailPath">缩略图存储路径</param>
/// <param name="width">缩略图宽</param>
/// <param name="height">缩略图高</param>
/// <param name="model">HW（指定宽高，会变形）；W(指定宽度,高度按照比例缩放)；H（指定高度,宽度按照等比例缩放）；BL(按要缩的宽高比例)</param>
/// <param name="disposeImg">是否注销图片</param>
public static void MakeThumNail(System.Drawing.Image originalImage, string thumNailPath, int width, int height, ThumbnailType model, bool disposeImg)
{
ImageAttributes imageAttributes = new ImageAttributes();
imageAttributes.SetWrapMode(WrapMode.TileFlipXY);
int thumWidth = width; //缩略图的宽度
int thumHeight = height; //缩略图的高度
int x = 0;
int y = 0;
int originalWidth = originalImage.Width; //原始图片的宽度
int originalHeight = originalImage.Height; //原始图片的高度
switch (model)
{
case ThumbnailType.AssignWidthAndHeight: //指定高宽缩放,可能变形
break;
case ThumbnailType.AssignWidth: //指定宽度,高度按照比例缩放
thumHeight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.AssignHeight: //指定高度,宽度按照等比例缩放
thumWidth = originalImage.Width * height / originalImage.Height;
break;
case ThumbnailType.Cut:
if ((double)originalImage.Width / (double)originalImage.Height > (double)thumWidth / (double)thumHeight)
{
originalHeight = originalImage.Height;
originalWidth = originalImage.Height * thumWidth / thumHeight;
y = 0;
x = (originalImage.Width - originalWidth) / 2;
}
else
{
originalWidth = originalImage.Width;
originalHeight = originalWidth * height / thumWidth;
x = 0;
y = (originalImage.Height - originalHeight) / 2;
}
break;
case ThumbnailType.AutoMaxPercent:
if (originalWidth > width || originalHeight > height)
{
if (originalWidth >= originalHeight)
{
thumHeight = originalHeight * width / originalWidth;
thumWidth = width;
}
else
{
thumWidth = originalWidth * height / originalHeight;
thumHeight = height;
}
}
else
{
thumWidth = originalWidth;
thumHeight = originalHeight;
}
break;
case ThumbnailType.AutoMinPercent:
if (originalWidth > width || originalHeight > height)
{
var perw = width / (double)originalWidth;
var perh = height / (double)originalHeight;
var per = Math.Min(perw, perh);
thumWidth = (int)Math.Ceiling(originalWidth * per);
thumHeight = (int)Math.Ceiling(originalHeight * per);
}
else
{
thumWidth = originalWidth;
thumHeight = originalHeight;
}
break;
default:
break;
}
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(thumWidth, thumHeight);
//新建一个画板
System.Drawing.Graphics graphic = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量查值法
graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphic.CompositingQuality = CompositingQuality.HighQuality;
//设置高质量，低速度呈现平滑程度
graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
graphic.Clear(System.Drawing.Color.White);
//在指定位置并且按指定大小绘制原图片的指定部分
graphic.DrawImage(originalImage, new Rectangle(0, 0, thumWidth, thumHeight), x, y,
originalWidth, originalHeight, GraphicsUnit.Pixel, imageAttributes);
long[] quality = new long[1];
quality[0] = 100;
System.Drawing.Imaging.EncoderParameters encoderParams = new System.Drawing.Imaging.EncoderParameters();
System.Drawing.Imaging.EncoderParameter encoderParam = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
encoderParams.Param[0] = encoderParam;
ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();//获得包含有关内置图像编码解码器的信息的ImageCodecInfo 对象。
ImageCodecInfo jpegICI = null;
for (int i = 0; i < arrayICI.Length; i++)
{
if (arrayICI[i].FormatDescription.Equals("JPEG"))
{
jpegICI = arrayICI[i];//设置JPEG编码
break;
}
}
try
{
if (jpegICI != null)
{
var dirpath = Path.GetDirectoryName(thumNailPath);
if (!Directory.Exists(dirpath))
Directory.CreateDirectory(dirpath);
bitmap.Save(thumNailPath, jpegICI, encoderParams);
//using (FileStream fs = new FileStream(thumNailPath, FileMode.Create))
//{
// bitmap.Save(fs, jpegICI, encoderParams);
//}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (disposeImg) originalImage.Dispose();
bitmap.Dispose();
graphic.Dispose();
}
}
public String GetLogoThumb( String relativeUrl, ThumbnailType ttype )
{
String original = GetLogoOriginal( relativeUrl );
return wojilu.Drawing.Img.GetThumbPath( original, ttype );
}
public static string Make(string sourcedir, string targetdir, string originalName, int width, int height, ThumbnailType type)
{
string thumbnailName = Path.GetFileNameWithoutExtension(originalName) + "_" + width + "-" + height + Path.GetExtension(originalName);
string thumbnailPath = targetdir + width + "_" + height + "\\";
string thumbnailFullName = thumbnailPath + thumbnailName;
NLibrary.IOHelper.EnsureFileDirectory(thumbnailPath);
if (!File.Exists(thumbnailFullName))
{
MakeThumbnail(sourcedir + originalName, thumbnailFullName, type, width, height);
}
return(thumbnailFullName);
}
/// <summary>
/// Publishes the ThumbnailEvent.
/// </summary>
/// <param name="bitmap">The bitmap being published.</param>
/// <param name="thumbnailType">The type of the Thumbnail</param>
public void SetThumbnail(WriteableBitmap bitmap, ThumbnailType thumbnailType)
{
var payload = new ThumbnailEventPayload(bitmap, thumbnailType);
this.eventAggregator.GetEvent <ThumbnailEvent>().Publish(payload);
}
private static void MakeThumbnail(string originalImagePath, string thumbnailPath, ThumbnailType tt, int width, int height)
{
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 (tt)
{
case ThumbnailType.ScalingByBoth: //指定高宽缩放（可能变形）
break;
case ThumbnailType.GeometricScalingByWidth: //指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.GeometricScalingByHeight: //指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
default: //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;
}
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
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(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 Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
public String GetGroupLogoThumb(String relativeUrl, ThumbnailType ttype)
{
String originalGroup = GetGroupLogoOriginal(relativeUrl);
return(wojilu.Drawing.Img.GetThumbPath(originalGroup, ttype));
}
/// <summary>
/// 根据原始图片名称和缩略图类型，获取缩略图名称
/// </summary>
/// <param name="srcPath"></param>
/// <param name="ttype"></param>
/// <returns></returns>
public static String GetThumbPath( Object srcPath, ThumbnailType ttype )
{
if (srcPath == null) return "";
String path = srcPath.ToString();
if (strUtil.IsNullOrEmpty( path )) return "";
String ext = Path.GetExtension( path );
String pathWithoutExt = strUtil.TrimEnd( path, ext );
if (pathWithoutExt.EndsWith( "_s" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_s" );
if (pathWithoutExt.EndsWith( "_b" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_b" );
if (pathWithoutExt.EndsWith( "_m" )) pathWithoutExt = strUtil.TrimEnd( pathWithoutExt, "_m" );
String suffix = "_s";
if (ttype == ThumbnailType.Medium)
suffix = "_m";
else if (ttype == ThumbnailType.Big)
suffix = "_b";
return pathWithoutExt + suffix + ext;
}
public static void CreateThumbnail(ThumbnailType thumbnailType, string source, string dest, int thumbWidth, int thumbHeight)
{
CreateThumbnail(thumbnailType, source, dest, thumbWidth, thumbHeight, Brushes.White);
}
/// <summary>
/// 创建缩略图（缩略图存在时、原图片不存在时，不生成）
/// </summary>
/// <param name="oldImagePath">原始图片</param>
/// <param name="newImagePath">新图片</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <param name="level">图片质量: 1 - 100</param>
/// <param name="mode">图片尺寸类型 </param>
public static byte[] MakeThumbnail(string oldImagePath, string newImagePath, int width, int height, ThumbnailType mode, int level)
{
newImagePath = newImagePath.Replace("\\", "/");
// 判断原图片是否存在
if (!File.Exists(oldImagePath)) { return null; }
// 判断缩略图存在时，则直接返回
if (File.Exists(newImagePath)) { return File.ReadAllBytes(newImagePath); }
// 创建文件夹
Directory.CreateDirectory(newImagePath.Substring(0, newImagePath.LastIndexOf("/")));
using (var oldImage = Image.FromFile(oldImagePath))
{
var toWidth = width = oldImage.Width >= width ? width : oldImage.Width;
var toHeight = height = oldImage.Height >= height ? height : oldImage.Height;
#region 计算宽高
switch (mode)
{
case ThumbnailType.W:
toHeight = oldImage.Height * width / oldImage.Width;
break;
case ThumbnailType.H:
toWidth = oldImage.Width * height / oldImage.Height;
break;
case ThumbnailType.Min:
toHeight = oldImage.Height * width / oldImage.Width;
if (toHeight > height)
{
toWidth = oldImage.Width * height / oldImage.Height;
toHeight = height;
}
break;
case ThumbnailType.Max: //宽度高度取最大值
toHeight = oldImage.Height * width / oldImage.Width;
if (toHeight < height)
{
toWidth = oldImage.Width * height / oldImage.Height;
toHeight = height;
}
break;
}
// 如果尺寸没变，则做复制操作
if (toWidth == oldImage.Width && toHeight == oldImage.Height)
{
File.Copy(oldImagePath, newImagePath, true);
return File.ReadAllBytes(newImagePath);
}
#endregion
using (var bm = new Bitmap(toWidth, toHeight))
{
using (var g = Graphics.FromImage(bm))
{
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.High;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.White);
g.DrawImage(oldImage, new Rectangle(0, 0, toWidth, toHeight), new Rectangle(0, 0, oldImage.Width, oldImage.Height), GraphicsUnit.Pixel);
g.Dispose();
}
SetQuality(level);
bm.Save(newImagePath, Ici, Ep);
bm.Dispose();
}
oldImage.Dispose();
}
if (mode == ThumbnailType.Cut) { Cut(newImagePath, 0, 0, width, height); }
return File.ReadAllBytes(newImagePath);
}
public void PickThumbnail(MediaData mediaData, ThumbnailType thumbnailType)
{
this.PickThumbnailCalled = true;
}
public static Boolean saveAvatarPrivate( int x, int y, String srcPath, ThumbnailType ttype )
{
String thumbPath = Img.GetThumbPath( srcPath, ttype );
try {
using (Image img = Image.FromFile( srcPath )) {
if (img.Size.Width <= x && img.Size.Height <= y) {
File.Copy( srcPath, thumbPath );
}
else if (img.RawFormat.Equals( System.Drawing.Imaging.ImageFormat.Gif ) && ImageAnimator.CanAnimate( img )) {
File.Copy( srcPath, thumbPath );
}
else {
logger.Info( "save thumbnail..." + ttype.ToString() + ": " + srcPath + "=>" + thumbPath );
Img.SaveThumbnail( srcPath, thumbPath, x, y, SaveThumbnailMode.Cut );
}
return true;
}
}
catch (OutOfMemoryException ex) {
logger.Error( "file format error: " + srcPath );
return false;
}
}
public String GetAvatarThumb( String relativeUrl, ThumbnailType ttype )
{
String originalAvatar = GetAvatarOriginal( relativeUrl );
return wojilu.Drawing.Img.GetThumbPath( originalAvatar, ttype );
}
/// <summary>
/// 根据主题id得到缩略图地址
/// </summary>
/// <param name="tid">主题id</param>
/// <param name="maxsize">最大图片尺寸</param>
/// <param name="type">缩略图类型</param>
/// <returns>缩略图地址</returns>
public static string GetThumbnailByTid(int tid, int maxsize, ThumbnailType type)
{
int theMaxsize = 300;
if (maxsize < theMaxsize)
{
theMaxsize = maxsize;
}
string attCachePath = string.Format("{0}cache/thumbnail/t_{1}_{2}_{3}.jpg", "/", tid, theMaxsize, (int)type);
string attPhyCachePath = Utils.GetMapPath(attCachePath);
if (!File.Exists(attPhyCachePath))
{
AttachmentInfo attach = GetFirstImageAttachByTid(tid);
if (attach == null)
return "";
attach.Attachment = attCachePath;
CreateTopicAttThumbnail(attPhyCachePath, type, Utils.GetMapPath(attach.Filename), theMaxsize);
}
return attCachePath;
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="thumbnailKey">リビルド対象のサムネイルキー</param>
/// <param name="imageSource"></param>
public ThumbnailEncodingInvoker(string thumbnailKey, ImageSource imageSource, ThumbnailType thumbnailType)
{
this._ImageSource = imageSource;
_rebuildThumbnailKey = thumbnailKey;
_ThumbnailType = thumbnailType;
}
/// <summary>
/// 创建主题附件缩略图
/// </summary>
/// <param name="attPhyCachePath">缓存文件路径</param>
/// <param name="type">缩略图类型</param>
/// <param name="attPhyPath">附件物理路径</param>
/// <param name="theMaxsize">最大尺寸</param>
private static void CreateTopicAttThumbnail(string attPhyCachePath, ThumbnailType type, string attPhyPath, int theMaxsize)
{
if (!File.Exists(attPhyPath))
return;
string cachedir = AppDomain.CurrentDomain.BaseDirectory + "cache/thumbnail/";
if (!Directory.Exists(cachedir))
{
try
{
Utils.CreateDir(cachedir);
}
catch
{
throw new Exception("请检查程序目录下cache文件夹的用户权限！");
}
}
DirectoryInfo dir = new DirectoryInfo(cachedir);
FileInfo[] files = dir.GetFiles();
if (files.Length > 1500)
{
QuickSort(files, 0, files.Length - 1);
for (int i = files.Length-1; i >= 1400; i--)
{
try
{
files[i].Delete();
}
catch
{}
}
}
try
{
switch (type)
{
case ThumbnailType.Square:
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
case ThumbnailType.Thumbnail:
Thumbnail.MakeThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
break;
default:
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
}
////当支持FTP上传附件时
//if (FTPConfigs.GetConfig().Allowuploadattach)
//{
// FTPs ftps = new FTPs();
// ftps.AsyncUpLoadFile(attPhyPath);
//}
}
catch
{
}
}
/// <summary>
/// Picks a thumbnail of the current media element.
/// </summary>
/// <param name="mediaData">The media data o the current element.</param>
public void PickThumbnail(MediaData mediaData, ThumbnailType thumbnailType)
{
if (mediaData != null)
{
IRCESmoothStreamingMediaPlugin mediaElement = mediaData.MediaPlugin as IRCESmoothStreamingMediaPlugin;
if (mediaElement != null)
{
this.StartThumbnailBuffer();
bool thumbnailSeekCompleted = false;
TimeSpan currentPosition = mediaElement.Position;
IRCESmoothStreamingMediaPlugin plugin = new RCESmoothStreamingMediaPlugin();
DispatcherTimer thubmnailTimer = new DispatcherTimer {
Interval = new TimeSpan(0, 0, 0, 5)
};
thubmnailTimer.Tick += (sender, e) =>
{
if (thumbnailSeekCompleted)
{
thumbnailSeekCompleted = false;
thubmnailTimer.Stop();
WriteableBitmap writeableBitmap =
new WriteableBitmap(plugin.VisualElement, null);
// writeableBitmap.Render(mediaElement, null);
writeableBitmap.Invalidate();
this.Model.SetThumbnail(writeableBitmap, thumbnailType);
this.PlayerContainerGrid.Children.Remove(plugin.VisualElement);
plugin.Unload();
plugin = null;
thubmnailTimer = null;
this.EndThumbnailBuffer();
}
};
thubmnailTimer.Start();
plugin.ManifestReady += e => plugin.SelectMaxAvailableBitrateTracks("cameraAngle", "camera1");
plugin.MediaOpened += e =>
{
e.Position = currentPosition;
e.VisualElement.Visibility = Visibility.Collapsed;
};
plugin.SeekCompleted += (e, success) => thumbnailSeekCompleted = true;
plugin.Load();
plugin.AutoPlay = false;
plugin.Volume = 0;
plugin.IsMuted = true;
plugin.VisualElement.Width = mediaElement.VisualElement.ActualWidth;
plugin.VisualElement.Height = mediaElement.VisualElement.ActualHeight;
this.PlayerContainerGrid.Children.Add(plugin.VisualElement);
plugin.AdaptiveSource = mediaElement.AdaptiveSource;
}
}
}
protected static Bitmap MakeThumbnail(Bitmap source, int width, int height, ThumbnailType mode)
{
Bitmap originalImage = source;
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case ThumbnailType.HW://指定高宽缩放（可能变形）
break;
case ThumbnailType.W://指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.H://指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case ThumbnailType.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
Bitmap bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
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(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 Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
originalImage.Dispose();
g.Dispose();
return bitmap;
}
public bool SaveFile(string base64String, string fileName, bool isPublic, out StorageFile outStorageFile, int?mediumThumbnailWidth = null, int?mediumThumbnailHeight = null, int?smallThumbnailWidth = null, int?smallThumbnailHeight = null, ThumbnailType thumbnailType = ThumbnailType.WhiteEdge, bool waterMark = false, object extensionConfig = null)
{
string[] imageArrty = base64String.Split(',');
string imgBase64Data = imageArrty[1];
string base64 = imgBase64Data;
byte[] bytes = Convert.FromBase64String(base64);
var fileStream = new MemoryStream(bytes);
return(SaveFile(fileStream, fileName, isPublic, out outStorageFile, mediumThumbnailWidth,
mediumThumbnailHeight, smallThumbnailWidth, smallThumbnailHeight, thumbnailType, waterMark, extensionConfig));
}
public String GetPhotoThumb(String relativeUrl, ThumbnailType ttype)
{
return(wojilu.Drawing.Img.GetThumbPath(GetPhotoOriginal(relativeUrl), ttype));
}
private static void saveThumbImagePrivate( String filename, ThumbnailType ttype, int x, int y, SaveThumbnailMode sm )
{
using (Image img = Image.FromFile( filename )) {
if (img.Size.Width <= x && img.Size.Height <= y) {
File.Copy( filename, Img.GetThumbPath( filename, ttype ) );
}
else {
Img.SaveThumbnail( filename, Img.GetThumbPath( filename, ttype ), x, y, sm );
}
}
}
private static void MakeThumbnail(string originalImagePath,string thumbnailPath, ThumbnailType tt, int width, int height)
{
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 (tt)
{
case ThumbnailType.ScalingByBoth://指定高宽缩放（可能变形）
break;
case ThumbnailType.GeometricScalingByWidth://指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.GeometricScalingByHeight://指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
default://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;
}
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
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(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 Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
/// <summary>
/// 创建主题附件缩略图
/// </summary>
/// <param name="attPhyCachePath">缓存文件路径</param>
/// <param name="type">缩略图类型</param>
/// <param name="attPhyPath">附件物理路径</param>
/// <param name="theMaxsize">最大尺寸</param>
private static void CreateTopicAttThumbnail(string attPhyCachePath, ThumbnailType type, string attPhyPath, int theMaxsize)
{
if (!attPhyPath.StartsWith("http://"))
attPhyPath = Utils.GetMapPath(attPhyPath);
if (!attPhyPath.StartsWith("http://") && !File.Exists(attPhyPath))
return;
string cachedir = Utils.GetMapPath(BaseConfigs.GetForumPath + "cache/thumbnail/");
if (!Directory.Exists(cachedir))
{
try
{
Utils.CreateDir(cachedir);
}
catch
{
throw new Exception("请检查程序目录下cache文件夹的用户权限！");
}
}
FileInfo[] files = new DirectoryInfo(cachedir).GetFiles();
if (files.Length > 1500)
{
QuickSort(files, 0, files.Length - 1);
for (int i = files.Length - 1; i >= 1400; i--)
{
try
{
files[i].Delete();
}
catch
{ }
}
}
try
{
switch (type)
{
case ThumbnailType.Square:
if (attPhyPath.StartsWith("http://"))
Thumbnail.MakeRemoteSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
else
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
case ThumbnailType.Thumbnail:
if (attPhyPath.StartsWith("http://"))
Thumbnail.MakeRemoteThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
else
Thumbnail.MakeThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
break;
default:
if (attPhyPath.StartsWith("http://"))
Thumbnail.MakeRemoteSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
else
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
}
}
catch
{ }
}
public static void MakeThumbnail(string srcImagePath, string thumbnailPath, int width, int height, ThumbnailType mode = ThumbnailType.HW, ImageFormat imageFormat = null)
{
if (imageFormat == null)
{
imageFormat = ImageFormat.Jpeg;
}
using (var bitmap = Image.FromFile(srcImagePath))
{
using (var target = MakeThumbnail(bitmap, width, height, mode))
{
target.Save(thumbnailPath, imageFormat);
}
}
}
private static void saveThumbSmall( String filename, ThumbnailType ttype )
{
int x = 0;
int y = 0;
SaveThumbnailMode sm = SaveThumbnailMode.Auto;
if (ttype == ThumbnailType.Small) {
x = config.Instance.Site.PhotoThumbWidth;
y = config.Instance.Site.PhotoThumbHeight;
sm = SaveThumbnailMode.Cut;
}
else if (ttype == ThumbnailType.Medium) {
x = config.Instance.Site.PhotoThumbWidthMedium;
y = config.Instance.Site.PhotoThumbHeightMedium;
}
else if (ttype == ThumbnailType.Big) {
x = config.Instance.Site.PhotoThumbWidthBig;
y = config.Instance.Site.PhotoThumbHeightBig;
}
using (Image img = Image.FromFile( filename )) {
if (img.Size.Width <= x && img.Size.Height <= y) {
File.Copy( filename, Img.GetThumbPath( filename, ttype ) );
}
else {
Img.SaveThumbnail( filename, Img.GetThumbPath( filename, ttype ), x, y, sm );
}
}
}
/// <summary>
/// 创建主题附件缩略图
/// </summary>
/// <param name="attPhyCachePath">缓存文件路径</param>
/// <param name="type">缩略图类型</param>
/// <param name="attPhyPath">附件物理路径</param>
/// <param name="theMaxsize">最大尺寸</param>
private static void CreateTopicAttThumbnail(string attPhyCachePath, ThumbnailType type, string attPhyPath, int theMaxsize)
{
if (!File.Exists(attPhyPath))
{
return;
}
string cachedir = AppDomain.CurrentDomain.BaseDirectory + "cache/thumbnail/";
if (!Directory.Exists(cachedir))
{
try
{
Utils.CreateDir(cachedir);
}
catch
{
throw new Exception("请检查程序目录下cache文件夹的用户权限！");
}
}
DirectoryInfo dir = new DirectoryInfo(cachedir);
FileInfo[] files = dir.GetFiles();
if (files.Length > 1500)
{
QuickSort(files, 0, files.Length - 1);
for (int i = files.Length - 1; i >= 1400; i--)
{
try
{
files[i].Delete();
}
catch
{}
}
}
try
{
switch (type)
{
case ThumbnailType.Square:
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
case ThumbnailType.Thumbnail:
Thumbnail.MakeThumbnailImage(attPhyPath, attPhyCachePath, theMaxsize, theMaxsize);
break;
default:
Thumbnail.MakeSquareImage(attPhyPath, attPhyCachePath, theMaxsize);
break;
}
////当支持FTP上传附件时
//if (FTPConfigs.GetConfig().Allowuploadattach)
//{
// FTPs ftps = new FTPs();
// ftps.AsyncUpLoadFile(attPhyPath);
//}
}
catch
{
}
}
private void AddThumbnailJSON(ref dynamic obj, ThumbnailType thtype, string fileName, string timeStart, string TimeStep, string TimeRange, int width, int height, bool preserveResolutionRotation, bool pixelmode, int quality = -1)
{
string extension = Enum.GetName(typeof(ThumbnailType), thtype); // to get Png, Bmp or Jpg
dynamic thOutputEntry = new JObject();
thOutputEntry.FileName = fileName;
dynamic Format = new JObject();
dynamic thEntry = new JObject();
if (!string.IsNullOrWhiteSpace(timeStart)) thEntry.Start = timeStart;
if (timeStart != strBest)
{
if (!string.IsNullOrWhiteSpace(TimeStep)) thEntry.Step = TimeStep;
if (!string.IsNullOrWhiteSpace(TimeRange)) thEntry.Range = TimeRange;
}
thEntry.Type = extension + "Image";
dynamic Layer = new JObject();
if (quality != -1)
{
Layer.Quality = quality;
}
Layer.Type = extension + "Layer";
if (pixelmode)
{
Layer.Width = width;
Layer.Height = height;
}
else // percentage
{
Layer.Width = width.ToString() + "%";
Layer.Height = height.ToString() + "%";
if (preserveResolutionRotation)
{
thEntry.PreserveResolutionAfterRotation = true;
}
}
switch (thtype)
{
case ThumbnailType.Bmp:
thEntry.BmpLayers = new JArray() as dynamic;
thEntry.BmpLayers.Add(Layer);
break;
case ThumbnailType.Png:
thEntry.PngLayers = new JArray() as dynamic;
thEntry.PngLayers.Add(Layer);
break;
case ThumbnailType.Jpg:
thEntry.JpgLayers = new JArray() as dynamic;
thEntry.JpgLayers.Add(Layer);
break;
}
obj.Codecs.Add(thEntry);
Format.Type = extension + "Format";
thOutputEntry.Format = Format;
obj.Outputs.Add(thOutputEntry);
}
private static Boolean saveThumbSmall( String filename, ThumbnailType ttype )
{
int x = 0;
int y = 0;
SaveThumbnailMode sm = SaveThumbnailMode.Auto;
if (ttype == ThumbnailType.Small) {
x = config.Instance.Site.PhotoThumbWidth;
y = config.Instance.Site.PhotoThumbHeight;
sm = SaveThumbnailMode.Cut;
}
else if (ttype == ThumbnailType.Medium) {
x = config.Instance.Site.PhotoThumbWidthMedium;
y = config.Instance.Site.PhotoThumbHeightMedium;
}
else if (ttype == ThumbnailType.Big) {
x = config.Instance.Site.PhotoThumbWidthBig;
y = config.Instance.Site.PhotoThumbHeightBig;
}
try {
saveThumbImagePrivate( filename, ttype, x, y, sm );
return true;
}
catch (OutOfMemoryException ex) {
logger.Error( "file format error: " + filename );
return false;
}
}
public void SetThumbnail(WriteableBitmap bitmap, ThumbnailType thumbnailType)
{
throw new NotImplementedException();
}
public String GetAvatarThumb(String relativeUrl, ThumbnailType ttype)
{
String originalAvatar = GetAvatarOriginal(relativeUrl);
return(wojilu.Drawing.Img.GetThumbPath(originalAvatar, ttype));
}
/// <summary>
/// 创建缩略图（缩略图存在时、原图片不存在时，不生成）
/// </summary>
/// <param name="oldImagePath">原始图片</param>
/// <param name="newImagePath">新图片</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <param name="level">图片质量: 1 - 100</param>
/// <param name="mode">图片尺寸类型 </param>
public static byte[] MakeThumbnail(string oldImagePath, string newImagePath, int width, int height, ThumbnailType mode, int level)
{
newImagePath = newImagePath.Replace("\\", "/");
// 判断原图片是否存在
if (!File.Exists(oldImagePath))
{
return(null);
}
// 判断缩略图存在时，则直接返回
if (File.Exists(newImagePath))
{
return(File.ReadAllBytes(newImagePath));
}
// 创建文件夹
Directory.CreateDirectory(newImagePath.Substring(0, newImagePath.LastIndexOf("/")));
using (var oldImage = Image.FromFile(oldImagePath))
{
var toWidth = width = oldImage.Width >= width ? width : oldImage.Width;
var toHeight = height = oldImage.Height >= height ? height : oldImage.Height;
#region 计算宽高
switch (mode)
{
case ThumbnailType.W: toHeight = oldImage.Height * width / oldImage.Width; break;
case ThumbnailType.H: toWidth = oldImage.Width * height / oldImage.Height; break;
case ThumbnailType.Min: toHeight = oldImage.Height * width / oldImage.Width;
if (toHeight > height)
{
toWidth = oldImage.Width * height / oldImage.Height;
toHeight = height;
}
break;
case ThumbnailType.Max: //宽度高度取最大值
toHeight = oldImage.Height * width / oldImage.Width;
if (toHeight < height)
{
toWidth = oldImage.Width * height / oldImage.Height;
toHeight = height;
}
break;
}
// 如果尺寸没变，则做复制操作
if (toWidth == oldImage.Width && toHeight == oldImage.Height)
{
File.Copy(oldImagePath, newImagePath, true);
return(File.ReadAllBytes(newImagePath));
}
#endregion
using (var bm = new Bitmap(toWidth, toHeight))
{
using (var g = Graphics.FromImage(bm))
{
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.High;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.White);
g.DrawImage(oldImage, new Rectangle(0, 0, toWidth, toHeight), new Rectangle(0, 0, oldImage.Width, oldImage.Height), GraphicsUnit.Pixel);
g.Dispose();
}
setQuality(level);
bm.Save(newImagePath, ici, ep);
bm.Dispose();
}
oldImage.Dispose();
}
if (mode == ThumbnailType.Cut)
{
Cut(newImagePath, 0, 0, width, height);
}
return(File.ReadAllBytes(newImagePath));
}
/// <summary>
/// 生成缩略图并压缩图片 (按比例缩小图片)
/// </summary>
/// <param name="sourcePath">源图片</param>
/// <param name="outPath">输出图片</param>
/// <param name="intWidth">图片宽带</param>
/// <param name="intHeight">图片高度</param>
/// <param name="quality">图片质量1-100</param>
/// <param name="type"></param>
/// <returns></returns>
public static bool GenerateThumbnailAndCompression(string sourcePath, string outPath, int intWidth, int intHeight, int quality, ThumbnailType type)
{
if (string.IsNullOrWhiteSpace(sourcePath) || string.IsNullOrWhiteSpace(outPath))
{
return(false);
}
var tempPath = $"{AppDomain.CurrentDomain.BaseDirectory}Files/Temp/{Guid.NewGuid()}";
tempPath.CreateDirByFilePath();
//缩略图片
var isExists = GenerateThumbnail(sourcePath, tempPath, intWidth, intHeight, type);
//压缩图片
var b = CompressionImage(isExists ? tempPath : sourcePath, outPath, quality);
if (isExists)
{
File.Delete(tempPath);
}
return(b);
}
public static Image MakeThumbnail(this Image srcImage, int width, int height, ThumbnailType mode)
{
//System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = srcImage.Width;
int oh = srcImage.Height;
if (srcImage.Width == width && srcImage.Height == height)
{
return(srcImage);
}
switch (mode)
{
case ThumbnailType.HW:
{
if (srcImage.Width > width || srcImage.Height > height)
{
// scale down the smaller dimension
if (width * srcImage.Height < height * srcImage.Width)
{
towidth = width;
toheight = (int)Math.Round((decimal)srcImage.Height * width / srcImage.Width);
}
else
{
toheight = height;
towidth = (int)Math.Round((decimal)srcImage.Width * height / srcImage.Height);
}
}
else
{
towidth = srcImage.Width;
toheight = srcImage.Height;
}
x = (int)Math.Round((width - towidth) / 2.0);
y = (int)Math.Round((height - toheight) / 2.0);
}
break;
case ThumbnailType.W:
toheight = srcImage.Height * width / srcImage.Width;
break;
case ThumbnailType.H:
towidth = srcImage.Width * height / srcImage.Height;
break;
case ThumbnailType.Cut:
if ((double)srcImage.Width / (double)srcImage.Height > (double)towidth / (double)toheight)
{
oh = srcImage.Height;
ow = srcImage.Height * towidth / toheight;
y = 0;
x = (srcImage.Width - ow) / 2;
}
else
{
ow = srcImage.Width;
oh = srcImage.Width * height / towidth;
x = 0;
y = (srcImage.Height - oh) / 2;
}
break;
default:
break;
}
//新建一个bmp图片
Image bitmap = new Bitmap(towidth, toheight);
//新建一个画板
Graphics g = Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
//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(srcImage, new Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);
try
{
return(bitmap);
}
catch (Exception e)
{
throw e;
}
finally
{
srcImage.Dispose();
g.Dispose();
}
}
/// <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（w:指定宽，高度自适应；h:指定高度，宽度自适应；cut:裁剪,图片中心向外；默认w）</param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, ThumbnailType mode)
{
try
{
using (System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath))
{
if (mode != ThumbnailType.Cut)
{
double d1 = double.Parse(width.ToString()) / double.Parse(height.ToString());
//宽高比
double wd = double.Parse(originalImage.Width.ToString()) / double.Parse(originalImage.Height.ToString());
//高宽比
double hd = double.Parse(originalImage.Height.ToString()) / double.Parse(originalImage.Width.ToString());
double itsw = 0d;
double itsh = 0d;
int itsin = 0;
//与宽高比对比
if (d1 > wd)
{
itsw = d1 - wd;
}
else
{
itsw = wd - d1;
}
//与高宽比对比
if (d1 > hd)
{
itsh = d1 - hd;
}
else
{
itsh = hd - d1;
}
//如果高宽比更接近比例
if (itsw > itsh)
{
mode = ThumbnailType.W;
}
else
{
mode = ThumbnailType.H;
}
}
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case ThumbnailType.HW://指定高宽缩放（可能变形）
break;
case ThumbnailType.W://指定宽，高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumbnailType.H://指定高，宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case ThumbnailType.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
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
}
catch
{
}
}