public Stream WatermarkText(TextWatermarkModel model)
{
if (ModelState.IsValid)
{
ImageHandler.TextWatermarker txtWatermarker = new ImageHandler.TextWatermarker(model.Image, model.CopyrightText);
txtWatermarker.ChangeFont(model.FontFamily, model.Bold, model.Italic, model.Underline, model.StrikeThrough);
txtWatermarker.Position = model.CopyrightPosition;
txtWatermarker.AddWatermark();
MemoryStream mem = new MemoryStream();
//txtWatermarker.WatermarkedImage.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
string fileName = model.File.FileName;
string extension = Path.GetExtension(fileName);
Response.ContentType = "image/" + extension;
txtWatermarker.WatermarkedImage.Save(mem, ImageHelper.GetImageFormatByExtension(extension));
Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", fileName));
mem.WriteTo(Response.OutputStream);
mem.Dispose();
txtWatermarker.Dispose();
return(Response.OutputStream);
}
else
{
return(null);
}
}
public void ProcessRequest(HttpContext context)
{
var response = context.Response;
var request = context.Request;
string imagePath = null;
// Check whether the page requesting the image is from your site.
if (request.UrlReferrer != null)
{
// Perform a case-insensitive comparison of the referer.
if (string.Compare(request.Url.Host, request.UrlReferrer.Host, true, CultureInfo.InvariantCulture) == 0)
{
// The requesting host is correct.
// Allow the image to be served(if it exists).
imagePath = request.PhysicalPath;
if (!File.Exists(imagePath))
{
response.StatusCode = 404;
response.StatusDescription = "File not found";
return;
}
else
{
// Serve the image normally
response.ContentType = GetMimeTypeByFileExtension(Path.GetExtension(imagePath));
response.WriteFile(imagePath);
return;
}
}
else
{
// Add watermark to the image
imagePath = request.PhysicalPath;
// Set the content type to the appropriate image type.
var extension = Path.GetExtension(imagePath);
if (extension != null)
{
response.ContentType = "image/" + extension.Replace(".", "").ToLower();
}
else
{
response.ContentType = "image/*";
}
// Serve the image.
var image = Image.FromFile(imagePath);
var txtWatermarker = new ImageHandler.TextWatermarker(image, "zizhujy.com");
txtWatermarker.AddWatermark();
image = txtWatermarker.WatermarkedImage;
//image.Save(response.OutputStream, ImageHelper.GetImageFormatByExtension(Path.GetExtension(imagePath)));
var mem = new MemoryStream();
image.Save(mem, ImageHelper.GetImageFormatByExtension(Path.GetExtension(imagePath)));
// Write the MemoryStream data to the OutputStream
response.ContentType = GetMimeTypeByFileExtension(imagePath);
mem.WriteTo(response.OutputStream);
mem.Dispose();
image.Dispose();
txtWatermarker.Dispose();
return;
}
}
else
{
// Add watermark to the image
imagePath = request.PhysicalPath;
// Set the content type to the appropriate image type.
var extension = Path.GetExtension(imagePath);
if (extension != null)
{
response.ContentType = "image/" + extension.Replace(".", "").ToLower();
}
else
{
response.ContentType = "image/*";
}
// Serve the image.
var image = Image.FromFile(imagePath);
var txtWatermarker = new ImageHandler.TextWatermarker(image, "zizhujy.com");
txtWatermarker.AddWatermark();
image = txtWatermarker.WatermarkedImage;
// If the image is in PNG format, then it can be saved into response.OutputStream directly
var format = ImageHelper.GetImageFormatByExtension(Path.GetExtension(imagePath));
//if (format.Equals(ImageFormat.Png))
if (true)
{
// Create the PNG in memory
var mem = new MemoryStream();
image.Save(mem, ImageFormat.Png);
// Write the MemoryStream data to the output stream.
response.ContentType = GetMimeTypeByFileExtension(imagePath);
mem.WriteTo(response.OutputStream);
mem.Dispose();
}
else
{
image.Save(response.OutputStream, format);
}
image.Dispose();
txtWatermarker.Dispose();
return;
}
}
