/// <summary>
/// Makes the image png if it's not a jpg, makes white transparent, compresses it, and saves in the book's folder.
/// Replaces any file with the same name.
/// </summary>
/// <returns>The name of the file, now in the book's folder.</returns>
private string ProcessAndCopyImage(PalasoImage imageInfo, string bookFolderPath)
{
var isJpeg = ShouldSaveAsJpeg(imageInfo);
try
{
using (Bitmap image = new Bitmap(imageInfo.Image))
//nb: there are cases (undefined) where we get out of memory if we are not operating on a copy
{
//photographs don't work if you try to make the white transparent
if (!isJpeg && image is Bitmap)
{
((Bitmap)image).MakeTransparent(Color.White);
//make white look realistic against background
}
string imageFileName = GetImageFileName(bookFolderPath, imageInfo, isJpeg);
var dest = Path.Combine(bookFolderPath, imageFileName);
if (File.Exists(dest))
{
try
{
File.Delete(dest);
}
catch (System.IO.IOException error)
{
throw new ApplicationException("Bloom could not replace the image " + imageFileName +
", probably because Bloom itself has it locked.");
}
}
image.Save(dest, isJpeg ? ImageFormat.Jpeg : ImageFormat.Png);
if (!isJpeg)
{
using (var dlg = new ProgressDialogBackground())
{
dlg.ShowAndDoWork((progress, args) => ImageUpdater.CompressImage(dest, progress));
}
}
imageInfo.Metadata.Write(dest);
return(imageFileName);
}
}
catch (System.IO.IOException)
{
throw; //these are informative on their own
}
catch (Exception error)
{
if (!string.IsNullOrEmpty(imageInfo.FileName) && File.Exists(imageInfo.OriginalFilePath))
{
var megs = new System.IO.FileInfo(imageInfo.OriginalFilePath).Length / (1024 * 1000);
if (megs > 2)
{
var msg = string.Format("Bloom was not able to prepare that picture for including in the book. \r\nThis is a rather large image to be adding to a book --{0} Megs--.", megs);
if (isJpeg)
{
msg += "\r\nNote, this file is a jpeg, which is normally used for photographs, not line-drawings (png, tiff, bmp). Bloom can handle smallish jpegs, large ones are difficult to handle, especialy if memory is limitted.";
}
throw new ApplicationException(msg, error);
}
}
throw new ApplicationException("Bloom was not able to prepare that picture for including in the book. Is it too large, or an odd format?\r\n" + imageInfo.FileName, error);
}
}
