public Bitmap LoadFile()
{
openFile = new OpenFileDialog {
Filter = "PPM (*.PPM)|*.PPM|All files (*.*)|*.*"
};
try {
if (openFile.ShowDialog() == DialogResult.OK)
{
//get the cchosen file path
FilePath = openFile.FileName;
openFile.Dispose();
if (CheckExtension(FilePath))
{
_isPPM = true;
//pass target to convertPPM class
ConvertPPM conv = new ConvertPPM(FilePath);
//convert to bitmap
return(conv.PPMtoBitmap());
}
else
{
_isPPM = false;
//convert to bitmap
return(new Bitmap(FilePath));
}
}
return(null);
} catch (IOException) {
throw new IOException();
} catch {
throw new Exception("Unknown error");
}
}
private void MnuSaveFile_Click(object sender, RoutedEventArgs e)
{
FileClass fileHandler = new FileClass();
//if bitmap exists, convert to PPM and save file
if (temp != null)
{
PromptPpmType ppmPrompt = new PromptPpmType();
Compresser compresser = new Compresser();
Container RleContainer;
Container LzwContainer;
Container decompressedContainer;
ConvertPPM convert = new ConvertPPM(temp);
convert.File = currentPath;
//get file type from user (ascii/raw)
ppmPrompt.ShowDialog();
//get compressed and decompressed containers
Container tempContainer = convert.BitmapConversion(ppmPrompt.ppm);
RleContainer = compresser.Compress(tempContainer);
LzwContainer = compresser.LzwCompression(tempContainer);
decompressedContainer = tempContainer;
//get the byte size of each
int RleBytes = ContainerByteSize(RleContainer);
int LzwBytes = ContainerByteSize(LzwContainer);
int decompressedBytes = ContainerByteSize(decompressedContainer);
//show comparison, choose compression
ConfirmCompress popup = new ConfirmCompress(RleBytes, decompressedBytes, LzwBytes);
popup.Owner = this;
popup.ShowDialog();
if (popup.chooseCompress == 1)
{
fileHandler.SaveFile(RleContainer);
}
else if (popup.chooseCompress == 2)
{
fileHandler.SaveFile(LzwContainer);
}
else
{
fileHandler.SaveFile(decompressedContainer);
}
}
}
