public string OutputFile(string path, string page, string outputPath)
{
int pageInt = int.Parse(page);
int numberOfPages = GetNumberOfPages(path);
if (numberOfPages == 0)
{
throw new MangaWrongFormatException(path);
}
if (pageInt < 1 || pageInt > numberOfPages)
{
throw new MangaContentMismatchException(path);
}
outputPath = outputPath + ".png";
using (PdfFile pdfFile = new PdfFile(path))
{
lock (pdfFile.Wrapper)
{
pdfFile.Wrapper.CurrentPage = pageInt;
using (PictureBox pictureBox = new PictureBox())
{
pictureBox.Width = pictureBox.Height = 3000;
pdfFile.Wrapper.FitToHeight(pictureBox.Handle);
pictureBox.Width = pdfFile.Wrapper.PageWidth;
pictureBox.Height = pdfFile.Wrapper.PageHeight;
pdfFile.Wrapper.RenderPage(pictureBox.Handle);
using (Bitmap image = new Bitmap(pdfFile.Wrapper.PageWidth, pdfFile.Wrapper.PageHeight))
{
using (Graphics g = Graphics.FromImage(image))
{
pdfFile.Wrapper.ClientBounds = new Rectangle(0, 0, pdfFile.Wrapper.PageWidth, pdfFile.Wrapper.PageHeight);
pdfFile.Wrapper.CurrentX = pdfFile.Wrapper.CurrentY = 0;
IntPtr ptr = g.GetHdc();
pdfFile.Wrapper.DrawPageHDC(ptr);
g.ReleaseHdc(ptr);
}
using (FileStream outputFile = new FileStream(outputPath, FileMode.Create))
{
image.Save(outputFile, ImageFormat.Png);
}
}
}
}
}
return outputPath;
}
private int GetNumberOfPages(string path)
{
try
{
using (PdfFile pdfFile = new PdfFile(path))
{
lock (pdfFile.Wrapper)
{
return pdfFile.Wrapper.PageCount;
}
}
}
catch (Exception)
{
return 0;
}
}