Namespaces:
using Microsoft.Win32;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using PdfSharp;
using PdfSharp.Pdf;
using PdfSharp.Drawing;
Erstellen von PNG oder TIFF Bitmap von Datei:
BitmapSource BitmapSource;
private void OpenFile(Object sender, RoutedEventArgs e)
{
OpenFileDialog OpenFileDialog = new OpenFileDialog();
OpenFileDialog.Filter = "PNG files (*.png)|*.png|TIFF files (*.tif)|*.tif";
if (OpenFileDialog.ShowDialog() == true)
{
try
{
if (OpenFileDialog.OpenFile() != null)
{
String InitialPath = OpenFileDialog.FileName;
FileStream InitialFileStream = new FileStream(InitialPath, FileMode.Open, FileAccess.Read, FileShare.Read);
switch (OpenFileDialog.FilterIndex)
{
case 1:
PngBitmapDecoder PngBitmapDecoder = new PngBitmapDecoder(InitialFileStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
BitmapSource = PngBitmapDecoder.Frames[0];
InitialFileStream.Close();
break;
case 2:
TiffBitmapDecoder TiffBitmapDecoder = new TiffBitmapDecoder(InitialFileStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
BitmapSource = TiffBitmapDecoder.Frames[0];
InitialFileStream.Close();
break;
}
}
}
catch (Exception Exception)
{
MessageBox.Show("Error: Could not read file from disk. Original error: ", Exception.Message, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}
Funktionen auf Button-Click:
private void ButtonClick(Object sender, RoutedEventArgs e)
{
PixelFormat PixelFormat = BitmapSource.Format;
if (PixelFormat == PixelFormats.Bgra32)
{
try
{
BitmapSource = Bgra32ToBgra24(BitmapSource);
//BitmapSource = Bgra32ToGray8(BitmapSource);
}
catch (Exception Exception)
{
MessageBox.Show("Error: Could not convert BitmapSource. Original error: ", Exception.Message, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}
Funktion:
public static BitmapSource Bgra32ToBgr24(BitmapSource BitmapSource)
{
Int32 PixelWidth = BitmapSource.PixelWidth;
Int32 PixelHeight = BitmapSource.PixelHeight;
Double DpiX = BitmapSource.DpiX;
Double DpiY = BitmapSource.DpiY;
PixelFormat InputPixelFormat = BitmapSource.Format;
BitmapPalette InputPalette = BitmapSource.Palette;
Int32 InputBitsPerPixel = BitmapSource.Format.BitsPerPixel;
Int32 InputStride = PixelWidth * InputBitsPerPixel/8;
Byte[] InputPixelsArray = new Byte[InputStride * PixelHeight];
BitmapSource.CopyPixels(InputPixelsArray, InputStride, 0);
PixelFormat PixelFormat = PixelFormats.Bgr24;
BitmapPalette Palette = null;
Int32 BitsPerPixel = 24;
Int32 Stride = PixelWidth * BitsPerPixel/8;
Byte[] PixelsArray = new Byte[InputStride * PixelHeight/4 * 3];
Int32 i = 0; Int32 j = 0; Int32 k = 0;
while (i < InputPixelsArray.Length/4)
{
PixelsArray[k] = InputPixelsArray[j];
PixelsArray[k + 1] = InputPixelsArray[j + 1];
PixelsArray[k + 2] = InputPixelsArray[j + 2];
i = i + 1;
j = j + 4;
k = k + 3;
}
BitmapSource = BitmapSource.Create(PixelWidth, PixelHeight, DpiX, DpiY, PixelFormat, Palette, PixelsArray, Stride);
return BitmapSource;
}
Umwandeln eines Kanals zu Gray8 Bitmap
public static BitmapSource Bgra32ToGray8(BitmapSource BitmapSource)
{
Int32 PixelWidth = BitmapSource.PixelWidth;
Int32 PixelHeight = BitmapSource.PixelHeight;
Double DpiX = BitmapSource.DpiX;
Double DpiY = BitmapSource.DpiY;
PixelFormat InputPixelFormat = BitmapSource.Format;
BitmapPalette InputPalette = BitmapSource.Palette;
Int32 InputBitsPerPixel = BitmapSource.Format.BitsPerPixel;
Int32 InputStride = PixelWidth * InputBitsPerPixel/8;
Byte[] InputPixelsArray = new Byte[InputStride * PixelHeight];
BitmapSource.CopyPixels(InputPixelsArray, InputStride, 0);
PixelFormat PixelFormat = PixelFormats.Gray8;
BitmapPalette Palette = null;
Int32 BitsPerPixel = 8;
Int32 Stride = PixelWidth * BitsPerPixel/8;
Byte[] A_PixelsArray = new Byte[InputStride * PixelHeight/4];
Int32 i = 0; Int32 j = 3;
while (i < InputPixelsArray.Length/4)
{
A_PixelsArray[i] = InputPixelsArray[j];
i = i + 1;
j = j + 4;
}
BitmapSource = BitmapSource.Create(PixelWidth, PixelHeight, DpiX, DpiY, PixelFormat, Palette, A_PixelsArray, Stride);
return BitmapSource;
}
Saving Bitmap PDF:
private void SaveFileAs(Object sender, RoutedEventArgs e)
{
SaveFileDialog SaveFileDialog = new SaveFileDialog();
SaveFileDialog.Filter = "PDF files (*.pdf)|*.pdf";
if (SaveFileDialog.ShowDialog() == true)
{
try
{
if (SaveFileDialog.FileName != null)
{
String DestinationPath = SaveFileDialog.FileName;
FileStream DestinationFileStream = new FileStream(DestinationPath, FileMode.Create, FileAccess.Write, FileShare.Write);
switch (SaveFileDialog.FilterIndex)
{
case 1:
PdfDocument PdfDocument = new PdfDocument();
PdfPage PdfPage = new PdfPage();
PdfDocument.Pages.Add(PdfPage);
XImage Image = XImage.FromBitmapSource(BitmapSource);
XGraphics XGraphic = XGraphics.FromPdfPage(PdfDocument.Pages[0]);
Double VerticalMargin = 20;
Double HorizontalMargin = 20;
Double Ratio = BitmapSource.Height/BitmapSource.Width;
Double ImageWidth = PdfPage.Width - 2 * VerticalMargin;
Double ImageHeight = Ratio * (PdfPage.Width - 2 * HorizontalMargin);
XGraphic.DrawImage(Image, VerticalMargin, HorizontalMargin, ImageWidth, ImageHeight);
PdfDocument.Save(DestinationFileStream);
PdfDocument.Close();
DestinationFileStream.Close();
break;
}
}
}
catch (Exception Exception)
{
MessageBox.Show("Error: Could not write file to disk. Original error: ", Exception.Message, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}
Insterad zum Zeichnen eines Rechtecks, Sie könnten einfach g.Clear aufrufen (Color.White); – Guffa
Super - danke für die schnelle Antwort! Aus irgendeinem Grund musste ich auch die Breite und Höhe für das g.DrawImage angeben ... ansonsten waren die platzierten Bilder aus irgendeinem Grund kleiner als ihre ursprüngliche .width/.height) –