public void VisualToImage(object visual, BookUIPoint pixelSize, ImageFormat format, string path)
{
if (!(visual is Visual target))
{
throw new ArgumentException(visual.GetType().FullName + "is not Visual!" + Environment.NewLine + "In " + nameof(IExportToImageService));
}
RenderTargetBitmap rtb = new RenderTargetBitmap((int)pixelSize.X, (int)pixelSize.Y, 96d, 96d, PixelFormats.Default);
DrawingVisual dv = new DrawingVisual();
using (DrawingContext dc = dv.RenderOpen())
{
VisualBrush vb = new VisualBrush(target);
dc.DrawRectangle(vb, null, new Rect(new Point(), new Point(pixelSize.X, pixelSize.Y)));
}
rtb.Render(dv);
BitmapEncoder bitmapEncoder = GetEncoderFromFormat(format);
bitmapEncoder.Frames.Add(BitmapFrame.Create(rtb));
using (var fs = File.OpenWrite(path))
{
bitmapEncoder.Save(fs);
}
}
private void ExportBookToImage(Book book, ImageFormat format, string path)
{
// Generate new folder
string folderPath = Path.Combine(Path.GetDirectoryName(path), Path.GetFileNameWithoutExtension(path));
Directory.CreateDirectory(folderPath);
BookUIPoint imageSize = new BookUIPoint(book.PaperSize.GetWidth() * 10, book.PaperSize.GetHeight() * 10);
List <BookPage> pages = new List <BookPage>(book.BookPages);
pages.Insert(0, book.FrontCover);
pages.Add(book.BackCover);
for (int i = 0, l = pages.Count; i < l; i++)
{
BookPage page = pages[i];
string imagePath = Path.Combine(folderPath, i + Path.GetExtension(path));
VisualToImage(page.ToCanvas(book.PaperSize), imageSize, format, imagePath);
}
}
