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@@ -1,8 +1,11 @@
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using GeekDesk.Constant;
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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.Windows;
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+using System.Windows.Interop;
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using System.Windows.Media.Imaging;
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namespace GeekDesk.Util
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@@ -66,7 +69,7 @@ namespace GeekDesk.Util
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{
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if (IsImage(filePath)) {
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//图片
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- return GetThumbnail(filePath, 256, 256);
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+ return GetThumbnailByFile(filePath, 256, 256);
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} else
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{ //其它文件
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return FileIcon.GetBitmapImage(filePath);
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@@ -86,47 +89,128 @@ namespace GeekDesk.Util
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/// <param name="lnWidth">缩略图的宽度</param>
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/// <param name="lnHeight">缩略图的高度</param>
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/// <returns></returns>
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- public static BitmapImage GetThumbnail(string lcFilename, int lnWidth, int lnHeight)
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+ //public static BitmapImage GetThumbnail(string lcFilename, int lnWidth, int lnHeight)
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+ //{
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+ // Bitmap bmpOut = null;
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+ // try
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+ // {
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+ // Bitmap loBMP = new Bitmap(lcFilename);
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+ // ImageFormat loFormat = loBMP.RawFormat;
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+
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+ // decimal lnRatio;
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+ // int lnNewWidth = 0;
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+ // int lnNewHeight = 0;
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+
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+ // //如果图像小于缩略图直接返回原图，因为upfront
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+ // if (loBMP.Width < lnWidth && loBMP.Height < lnHeight)
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+ // return BitmapToBitmapImage(loBMP);
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+ // if (loBMP.Width > loBMP.Height)
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+ // {
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+ // lnRatio = (decimal)lnWidth / loBMP.Width;
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+ // lnNewWidth = lnWidth;
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+ // decimal lnTemp = loBMP.Height * lnRatio;
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+ // lnNewHeight = (int)lnTemp;
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+ // }
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+ // else
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+ // {
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+ // lnRatio = (decimal)lnHeight / loBMP.Height;
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+ // lnNewHeight = lnHeight;
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+ // decimal lnTemp = loBMP.Width * lnRatio;
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+ // lnNewWidth = (int)lnTemp;
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+ // }
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+ // bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
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+ // Graphics g = Graphics.FromImage(bmpOut);
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+ // g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
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+ // g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
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+ // g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);
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+ // loBMP.Dispose();
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+ // }
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+ // catch (Exception e)
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+ // {
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+ // return Base64ToBitmapImage(Constants.DEFAULT_IMG_IMAGE_BASE64);
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+ // }
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+ // return BitmapToBitmapImage(bmpOut);
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+ //}
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+
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+ public static BitmapImage GetThumbnailByFile(string filePath, int tWidth, int tHeight)
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{
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- Bitmap bmpOut = null;
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+
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try
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{
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- Bitmap loBMP = new Bitmap(lcFilename);
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- ImageFormat loFormat = loBMP.RawFormat;
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-
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- decimal lnRatio;
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- int lnNewWidth = 0;
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- int lnNewHeight = 0;
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-
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- //如果图像小于缩略图直接返回原图，因为upfront
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- if (loBMP.Width < lnWidth && loBMP.Height < lnHeight)
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- return BitmapToBitmapImage(bmpOut);
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- if (loBMP.Width > loBMP.Height)
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+ Image img = Image.FromFile(filePath);
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+ if (img.Width <= tWidth && img.Height <= tHeight)
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{
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- lnRatio = (decimal)lnWidth / loBMP.Width;
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- lnNewWidth = lnWidth;
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- decimal lnTemp = loBMP.Height * lnRatio;
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- lnNewHeight = (int)lnTemp;
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+ return GetBitmapImageByFile(filePath);
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}
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else
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{
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- lnRatio = (decimal)lnHeight / loBMP.Height;
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- lnNewHeight = lnHeight;
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- decimal lnTemp = loBMP.Width * lnRatio;
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- lnNewWidth = (int)lnTemp;
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+ Bitmap loBMP = new Bitmap(filePath);
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+ ImageFormat loFormat = loBMP.RawFormat;
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+
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+ decimal lnRatio;
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+ int lnNewWidth;
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+ int lnNewHeight;
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+ if (loBMP.Width > loBMP.Height)
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+ {
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+ lnRatio = (decimal)tWidth / loBMP.Width;
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+ lnNewWidth = tWidth;
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+ decimal lnTemp = loBMP.Height * lnRatio;
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+ lnNewHeight = (int)lnTemp;
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+ }
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+ else
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+ {
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+ lnRatio = (decimal)tHeight / loBMP.Height;
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+ lnNewHeight = tHeight;
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+ decimal lnTemp = loBMP.Width * lnRatio;
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+ lnNewWidth = (int)lnTemp;
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+ }
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+ Bitmap bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
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+ Graphics g = Graphics.FromImage(bmpOut);
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+ g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
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+ g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
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+ g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);
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+ loBMP.Dispose();
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+ string tempPath = Constants.APP_DIR + "\\temp";
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+ if (File.Exists(tempPath))
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+ {
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+ File.Delete(tempPath);
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+ }
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+ bmpOut.Save(tempPath, loFormat);
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+ BitmapImage bm = GetBitmapImageByFile(tempPath);
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+ File.Delete(tempPath);
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+ return bm;
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}
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- bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
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- Graphics g = Graphics.FromImage(bmpOut);
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- g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
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- g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
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- g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);
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- loBMP.Dispose();
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}
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- catch
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+ catch (Exception)
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{
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return Base64ToBitmapImage(Constants.DEFAULT_IMG_IMAGE_BASE64);
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}
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- return BitmapToBitmapImage(bmpOut);
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+
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+ }
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+
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+
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+ public static BitmapImage GetBitmapImageByFile(string filePath)
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+ {
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+ BitmapImage bmImg = new BitmapImage();
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+ bmImg.BeginInit();
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+ bmImg.CacheOption = BitmapCacheOption.OnLoad;
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+ using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
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+ {
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+ bmImg.StreamSource = fs;
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+ bmImg.EndInit();
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+ }
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+ return bmImg;
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+ }
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+
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+ public static BitmapImage MemoryStremToBitMapImage(MemoryStream ms)
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+ {
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+ BitmapImage bi = new BitmapImage();
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+ bi.BeginInit();
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+ bi.StreamSource = ms;
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+ bi.CacheOption = BitmapCacheOption.OnLoad;
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+ bi.EndInit();
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+ bi.Freeze();
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+ return bi;
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}
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@@ -135,12 +219,24 @@ namespace GeekDesk.Util
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/// </summary>
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/// <param name="bitmap"></param>
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/// <returns></returns>
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- private static BitmapImage BitmapToBitmapImage(Bitmap bitmap)
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+ public static BitmapImage BitmapToBitmapImage(Bitmap bitmap)
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+ {
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+ return BitmapToBitmapImage(bitmap, null);
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+ }
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+
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+ public static BitmapImage BitmapToBitmapImage(Image bitmap, ImageFormat format)
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{
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BitmapImage bitmapImage = new BitmapImage();
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using (MemoryStream ms = new MemoryStream())
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{
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- bitmap.Save(ms, bitmap.RawFormat);
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+ if (format == null)
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+ {
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+ bitmap.Save(ms, bitmap.RawFormat);
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+ }
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+ else
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+ {
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+ bitmap.Save(ms, format);
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+ }
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bitmapImage.BeginInit();
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bitmapImage.StreamSource = ms;
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bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
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@@ -150,6 +246,29 @@ namespace GeekDesk.Util
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return bitmapImage;
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}
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+ [System.Runtime.InteropServices.DllImport("gdi32.dll")]
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+ public static extern bool DeleteObject(IntPtr hObject);
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+
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+ public static BitmapImage Bitmap2BitmapImage(Bitmap bitmap)
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+ {
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+ IntPtr hBitmap = bitmap.GetHbitmap();
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+ BitmapImage retval;
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+ try
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+ {
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+ retval = (BitmapImage)Imaging.CreateBitmapSourceFromHBitmap(
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+ hBitmap,
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+ IntPtr.Zero,
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+ Int32Rect.Empty,
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+ BitmapSizeOptions.FromEmptyOptions());
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+ }
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+ finally
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+ {
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+ DeleteObject(hBitmap);
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+ }
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+ return retval;
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+ }
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+
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+
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/// <summary>
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/// 图片文件转base64
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/// </summary>
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liufei