public static IFileObject SaveAndResizeImage(Stream input, IFileSystem fs, IFileObject file, int maxWidth, int maxHeight, ImageFormat saveAsFormat )
{
Image img;
MemoryStream imgSrcStream = new MemoryStream();
byte[] buf = new byte[1024*50];
int bufRead = 0;
do {
bufRead = input.Read(buf, 0, buf.Length);
if (bufRead>0)
imgSrcStream.Write(buf, 0, bufRead);
} while (bufRead>0);
imgSrcStream.Position = 0;
try {
img = Image.FromStream(imgSrcStream);
} catch (Exception ex) {
throw new Exception( WebManager.GetLabel("Invalid image format") );
}
if (img.Size.Width==0 || img.Size.Height==0)
throw new Exception( WebManager.GetLabel("Invalid image size") );
var sizeIsWidthOk = (maxWidth<=0 || img.Size.Width<=maxWidth);
var sizeIsHeightOk = (maxHeight<=0 || img.Size.Height<=maxHeight);
var sizeIsOk = sizeIsWidthOk && sizeIsHeightOk;
var originalImgFmt = ResolveImageFormat( Path.GetExtension(file.Name) ) ?? ImageFormat.Bmp;
var formatIsOk = (saveAsFormat==null && !originalImgFmt.Equals(ImageFormat.Bmp) && !originalImgFmt.Equals(ImageFormat.Tiff) ) || originalImgFmt.Equals(saveAsFormat);
if (!formatIsOk || !sizeIsOk ) {
var saveAsFormatResolved = saveAsFormat!=null ? saveAsFormat : (originalImgFmt==ImageFormat.Jpeg?ImageFormat.Jpeg:ImageFormat.Png);
var newFmtExtension = GetImageFormatExtension(saveAsFormatResolved);
var newFile = fs.ResolveFile( file.Name + (Path.GetExtension(file.Name).ToLower()==newFmtExtension ? String.Empty : newFmtExtension) );
newFile.CreateFile();
if (!sizeIsOk) {
var newWidth = img.Size.Width;
var newHeight = img.Size.Height;
if (!sizeIsWidthOk) {
newWidth = maxWidth;
newHeight = (int) Math.Floor( ((double)img.Size.Height)*( ((double)maxWidth)/((double)img.Size.Width) ) );
if ( maxHeight<0 || newHeight<=maxHeight )
sizeIsHeightOk = true;
}
if (!sizeIsHeightOk) {
newHeight = maxHeight;
newWidth = (int) Math.Floor( ((double)img.Size.Width)*( ((double)maxHeight)/((double)img.Size.Height) ) );
}
var resizedBitmap = new Bitmap(img, newWidth, newHeight);
var imageProps = img.PropertyItems;
foreach (PropertyItem propItem in imageProps){
resizedBitmap.SetPropertyItem(propItem);
}
SaveImage(resizedBitmap, newFile.GetContent().OutputStream, saveAsFormatResolved);
} else {
SaveImage(img, newFile.GetContent().OutputStream, saveAsFormatResolved );
}
newFile.Close();
return newFile;
}
file.CreateFile();
imgSrcStream.Position = 0;
file.CopyFrom( imgSrcStream );
file.Close();
return file;
}
public static IFileObject SaveAndResizeImage(Stream input, IFileSystem fs, IFileObject file, int maxWidth, int maxHeight, ImageFormat saveAsFormat)
{
Image img;
MemoryStream imgSrcStream = new MemoryStream();
byte[] buf = new byte[1024 * 50];
int bufRead = 0;
do
{
bufRead = input.Read(buf, 0, buf.Length);
if (bufRead > 0)
{
imgSrcStream.Write(buf, 0, bufRead);
}
} while (bufRead > 0);
imgSrcStream.Position = 0;
try {
img = Image.FromStream(imgSrcStream);
} catch (Exception ex) {
throw new Exception(WebManager.GetLabel("Invalid image format"));
}
if (img.Size.Width == 0 || img.Size.Height == 0)
{
throw new Exception(WebManager.GetLabel("Invalid image size"));
}
var sizeIsWidthOk = (maxWidth <= 0 || img.Size.Width <= maxWidth);
var sizeIsHeightOk = (maxHeight <= 0 || img.Size.Height <= maxHeight);
var sizeIsOk = sizeIsWidthOk && sizeIsHeightOk;
var originalImgFmt = ResolveImageFormat(Path.GetExtension(file.Name)) ?? ImageFormat.Bmp;
var formatIsOk = (saveAsFormat == null && !originalImgFmt.Equals(ImageFormat.Bmp) && !originalImgFmt.Equals(ImageFormat.Tiff)) || originalImgFmt.Equals(saveAsFormat);
if (!formatIsOk || !sizeIsOk)
{
var saveAsFormatResolved = saveAsFormat != null ? saveAsFormat : (originalImgFmt == ImageFormat.Jpeg?ImageFormat.Jpeg:ImageFormat.Png);
var newFmtExtension = GetImageFormatExtension(saveAsFormatResolved);
var newFile = fs.ResolveFile(file.Name + (Path.GetExtension(file.Name).ToLower() == newFmtExtension ? String.Empty : newFmtExtension));
newFile.CreateFile();
if (!sizeIsOk)
{
var newWidth = img.Size.Width;
var newHeight = img.Size.Height;
if (!sizeIsWidthOk)
{
newWidth = maxWidth;
newHeight = (int)Math.Floor(((double)img.Size.Height) * (((double)maxWidth) / ((double)img.Size.Width)));
if (maxHeight < 0 || newHeight <= maxHeight)
{
sizeIsHeightOk = true;
}
}
if (!sizeIsHeightOk)
{
newHeight = maxHeight;
newWidth = (int)Math.Floor(((double)img.Size.Width) * (((double)maxHeight) / ((double)img.Size.Height)));
}
var resizedBitmap = new Bitmap(img, newWidth, newHeight);
var imageProps = img.PropertyItems;
foreach (PropertyItem propItem in imageProps)
{
resizedBitmap.SetPropertyItem(propItem);
}
SaveImage(resizedBitmap, newFile.GetContent().OutputStream, saveAsFormatResolved);
}
else
{
SaveImage(img, newFile.GetContent().OutputStream, saveAsFormatResolved);
}
newFile.Close();
return(newFile);
}
file.CreateFile();
imgSrcStream.Position = 0;
file.CopyFrom(imgSrcStream);
file.Close();
return(file);
}
