//Change image format and size.
static public byte[] ChangeImageFormat(Stream imgStrm, ChangeImageInfo chgImageInfo)
{
Stream changedStrm;
byte[] pixelByteArray;
bool noSizeFlg = (chgImageInfo.width == 0 && chgImageInfo.height == 0);
Bitmap bmp;
if (noSizeFlg)
{
//When the image size and format to be converted is not designated.
bmp = new Bitmap(Image.FromStream(imgStrm));
}
else
{
//When the image size and format to be converted is designated.
bmp = new Bitmap(Image.FromStream(imgStrm), chgImageInfo.width, chgImageInfo.height);
}
changedStrm = new MemoryStream();
bmp.Save(changedStrm, selectImageFormat(chgImageInfo.format));
changedStrm.Position = 0;
long strmLength = changedStrm.Length;
pixelByteArray = new byte[strmLength];
changedStrm.Read(pixelByteArray, 0, (int)strmLength);
return(pixelByteArray);
}
//Return image file of specified size and format.
public IHttpActionResult Get(string containerName)
{
string blobName = HttpContext.Current.Request.QueryString["name"];
string sWidth = HttpContext.Current.Request.QueryString["w"];
string sHeight = HttpContext.Current.Request.QueryString["h"];
string sformat = HttpContext.Current.Request.QueryString["f"];
string contentDsp = HttpContext.Current.Request.QueryString["cdsp"];
int outPrm = 0;
int.TryParse(sHeight, out outPrm);
int imgHeight = outPrm;
int.TryParse(sWidth, out outPrm);
int imgWidth = outPrm;
if (sformat == null || sformat == "")
{
sformat = "jpg";
}
ChangeImageInfo chgImageInfo = new ChangeImageInfo(sformat.ToLower(), imgHeight, imgWidth);
CloudBlobContainer container = Helper.FileService.GetContainerInstance(containerName);
CloudBlockBlob blockBlob = container.GetBlockBlobReference(blobName);
var memoryStream = new MemoryStream();
blockBlob.DownloadToStream(memoryStream);
byte[] buff = ImageService.ChangeImageFormat(memoryStream, chgImageInfo);
if (contentDsp == "at")
{
string dlFileName = FileService.getFileNameWithoutEtn(blobName) + sformat;
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=\"" + dlFileName + "\"");
}
HttpContext.Current.Response.ContentType = "image/" + sformat;
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.BinaryWrite(buff);
HttpContext.Current.Response.End();
return(Ok());
}
