| public static Generate ( Image image, int thumbWidth, int thumbHeight, ImageScaleMode mode, Color backgroundColor, float xDPI, float yDPI ) : Image | ||
| image | Image | /// Image object to generate thumbnail for (required) |
| thumbWidth | int | /// Thumbnail width. If 0, width is calculated by source aspect ratio. Only one of /// width or height can be zero. |
| thumbHeight | int | /// Thumbnail height. If 0, height is calculated by source aspect ratio. Only one of /// width or height can be zero. |
| mode | ImageScaleMode |
/// Thumbnail generation mode. It is only important when both dimensions are specified and
/// source aspect ratio is different than thumbnail (see |
| backgroundColor | Color | /// Specifies fill color for PreserveRatioWithFill mode. |
| xDPI | float | |
| yDPI | float | |
| return | Image | |
private bool ProcessImageStream(Stream fileContent, ITextLocalizer localizer)
{
var imageChecker = new ImageChecker();
CheckResult = imageChecker.CheckStream(fileContent, true, out Image image, Logger);
try
{
FileSize = imageChecker.DataSize;
ImageWidth = imageChecker.Width;
ImageHeight = imageChecker.Height;
if (CheckResult != ImageCheckResult.JPEGImage &&
CheckResult != ImageCheckResult.GIFImage &&
CheckResult != ImageCheckResult.PNGImage)
{
ErrorMessage = imageChecker.FormatErrorMessage(CheckResult, localizer);
return(false);
}
else
{
IsImage = true;
var extension = CheckResult == ImageCheckResult.PNGImage ? ".png" :
(CheckResult == ImageCheckResult.GIFImage ? ".gif" : ".jpg");
storage.PurgeTemporaryFiles();
if (ThumbWidth > 0 || ThumbHeight > 0)
{
using Image thumbImage =
ThumbnailGenerator.Generate(image, ThumbWidth, ThumbHeight, ThumbScaleMode, ThumbBackColor);
var thumbFile = UploadPathHelper.GetThumbnailName(TemporaryFile);
using (var ms = new MemoryStream())
{
if (ThumbQuality != 0)
{
var p = new EncoderParameters(1);
p.Param[0] = new EncoderParameter(Encoder.Quality, ThumbQuality);
ImageCodecInfo jpegCodec = null;
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
// Find the correct image codec
for (int i = 0; i < codecs.Length; i++)
{
if (codecs[i].MimeType == "image/jpeg")
{
jpegCodec = codecs[i];
}
}
thumbImage.Save(ms, jpegCodec, p);
}
else
{
thumbImage.Save(ms, ImageFormat.Jpeg);
}
ms.Seek(0, SeekOrigin.Begin);
ThumbFile = storage.WriteFile(thumbFile, ms, autoRename: false);
}
ThumbHeight = thumbImage.Width;
ThumbWidth = thumbImage.Height;
}
return(true);
}
}
finally
{
if (image != null)
{
image.Dispose();
}
}
}
private bool ProcessImageStream(Stream fileContent, string extension)
{
Image image = null;
var imageChecker = new ImageChecker();
CheckResult = imageChecker.CheckStream(fileContent, true, out image);
try
{
FileSize = imageChecker.DataSize;
ImageWidth = imageChecker.Width;
ImageHeight = imageChecker.Height;
if (CheckResult != ImageCheckResult.JPEGImage &&
CheckResult != ImageCheckResult.GIFImage &&
CheckResult != ImageCheckResult.PNGImage)
{
ErrorMessage = imageChecker.FormatErrorMessage(CheckResult);
return(false);
}
else
{
IsImage = true;
extension = (CheckResult == ImageCheckResult.PNGImage ? ".png" :
(CheckResult == ImageCheckResult.GIFImage ? ".gif" : ".jpg"));
var temporaryPath = UploadHelper.TemporaryPath;
Directory.CreateDirectory(temporaryPath);
TemporaryFileHelper.PurgeDirectoryDefault(temporaryPath);
string baseFileName = System.IO.Path.Combine(temporaryPath, Guid.NewGuid().ToString("N"));
FilePath = baseFileName + extension;
fileContent.Seek(0, SeekOrigin.Begin);
using (FileStream fs = new FileStream(FilePath, FileMode.Create))
fileContent.CopyTo(fs);
if (ThumbWidth > 0 || ThumbHeight > 0)
{
using (System.Drawing.Image thumbImage =
ThumbnailGenerator.Generate(image, ThumbWidth, ThumbHeight, ThumbScaleMode, ThumbBackColor))
{
ThumbFile = baseFileName + "_t.jpg";
if (ThumbQuality != 0)
{
var p = new System.Drawing.Imaging.EncoderParameters(1);
p.Param[0] = new EncoderParameter(Encoder.Quality, ThumbQuality);
ImageCodecInfo jpegCodec = null;
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
// Find the correct image codec
for (int i = 0; i < codecs.Length; i++)
{
if (codecs[i].MimeType == "image/jpeg")
{
jpegCodec = codecs[i];
}
}
thumbImage.Save(ThumbFile, jpegCodec, p);
}
else
{
thumbImage.Save(ThumbFile, System.Drawing.Imaging.ImageFormat.Jpeg);
}
ThumbHeight = thumbImage.Width;
ThumbWidth = thumbImage.Height;
}
}
return(true);
}
}
finally
{
if (image != null)
{
image.Dispose();
image = null;
}
}
}
private bool ProcessImageStream(Stream fileContent, ITextLocalizer localizer)
{
var imageChecker = new ImageChecker();
CheckResult = imageChecker.CheckStream(fileContent, true, out Image image, Logger);
try
{
FileSize = imageChecker.DataSize;
ImageWidth = imageChecker.Width;
ImageHeight = imageChecker.Height;
if (CheckResult != ImageCheckResult.JPEGImage &&
CheckResult != ImageCheckResult.GIFImage &&
CheckResult != ImageCheckResult.PNGImage)
{
ErrorMessage = imageChecker.FormatErrorMessage(CheckResult, localizer);
return(false);
}
else
{
IsImage = true;
var extension = CheckResult == ImageCheckResult.PNGImage ? ".png" :
(CheckResult == ImageCheckResult.GIFImage ? ".gif" : ".jpg");
storage.PurgeTemporaryFiles();
if (ThumbWidth > 0 || ThumbHeight > 0)
{
ThumbnailGenerator.Generate(image, ThumbWidth, ThumbHeight, ThumbScaleMode, ThumbBackColor,
inplace: true);
var thumbFile = UploadPathHelper.GetThumbnailName(TemporaryFile);
using (var ms = new MemoryStream())
{
if (ThumbQuality != 0)
{
image.Save(ms, new JpegEncoder {
Quality = ThumbQuality
});
}
else
{
image.Save(ms, new JpegEncoder());
}
ms.Seek(0, SeekOrigin.Begin);
ThumbFile = storage.WriteFile(thumbFile, ms, autoRename: false);
}
ThumbHeight = image.Width;
ThumbWidth = image.Height;
}
return(true);
}
}
finally
{
if (image != null)
{
image.Dispose();
}
}
}
