public PhotoPreview(CapturedItem item, bool maximize)
{
InitializeComponent();
this.item = item;
this.statusName.Text = item.Name;
this.statusSize.Text = (((double)item.Size) / 1024 / 1024).ToString("0.00") + "MB";
if (maximize)
{
this.WindowState = FormWindowState.Maximized;
}
scaleImage();
}
/// <summary>
/// Gets a photo or video clip from the camera
/// </summary>
/// <param name="directoryItem">Reference to the item that the camera captured.</param>
/// <returns></returns>
private CapturedItem getCapturedItem(IntPtr directoryItem)
{
uint err = EDSDK.EDS_ERR_OK;
IntPtr stream = IntPtr.Zero;
EDSDK.EdsDirectoryItemInfo dirItemInfo;
err = EDSDK.EdsGetDirectoryItemInfo(directoryItem, out dirItemInfo);
if (err != EDSDK.EDS_ERR_OK)
{
throw new CameraException("Unable to get captured item info!", err);
}
// Fill the stream with the resulting image
if (err == EDSDK.EDS_ERR_OK)
{
err = EDSDK.EdsCreateMemoryStream((uint)dirItemInfo.Size, out stream);
}
// Copy the stream to a byte[] and
if (err == EDSDK.EDS_ERR_OK)
{
err = EDSDK.EdsDownload(directoryItem, (uint)dirItemInfo.Size, stream);
}
// Create the returned item
CapturedItem item = new CapturedItem();
if (err == EDSDK.EDS_ERR_OK)
{
IntPtr imageRef = IntPtr.Zero;
err = EDSDK.EdsCreateImageRef(stream, out imageRef);
if (err == EDSDK.EDS_ERR_OK)
{
EDSDK.EdsImageInfo info;
err = EDSDK.EdsGetImageInfo(imageRef, EDSDK.EdsImageSource.FullView, out info);
if (err == EDSDK.EDS_ERR_OK)
{
item.Dimensions = new com.waynehartman.util.graphics.Dimension((int)info.Width, (int)info.Height);
EDSDK.EdsRelease(imageRef);
}
}
}
if (err == EDSDK.EDS_ERR_OK)
{
byte[] buffer = new byte[(int)dirItemInfo.Size];
GCHandle gcHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IntPtr address = gcHandle.AddrOfPinnedObject();
IntPtr streamPtr = IntPtr.Zero;
err = EDSDK.EdsGetPointer(stream, out streamPtr);
if (err != EDSDK.EDS_ERR_OK)
{
throw new CameraDownloadException("Unable to get resultant image.", err);
}
try
{
Marshal.Copy(streamPtr, buffer, 0, (int)dirItemInfo.Size);
item.Image = buffer;
item.Name = dirItemInfo.szFileName;
item.Size = (long)dirItemInfo.Size;
item.IsFolder = Convert.ToBoolean(dirItemInfo.isFolder);
return item;
}
catch (AccessViolationException ave)
{
throw new CameraDownloadException("Error copying unmanaged stream to managed byte[].", ave);
}
finally
{
gcHandle.Free();
EDSDK.EdsRelease(stream);
EDSDK.EdsRelease(streamPtr);
}
}
else
{
throw new CameraDownloadException("Unable to get resultant image.", err);
}
}