// initialization
private void OnLoad(object sender, EventArgs e)
{
// program title
Text = "Pdf417DecoderDemo - " + Pdf417Decoder.VersionNumber + " \u00a9 2019 Uzi Granot. All rights reserved.";
#if DEBUG
// current directory
string CurDir = Environment.CurrentDirectory;
string WorkDir = CurDir.Replace("bin\\Debug", "Work");
if (WorkDir != CurDir && Directory.Exists(WorkDir))
{
Environment.CurrentDirectory = WorkDir;
}
// open trace file
Pdf417Trace.Open("Pdf417DecoderTrace.txt");
Pdf417Trace.Write("Pdf417DecoderDemo");
#endif
// create decoder
Pdf417Decoder = new Pdf417Decoder();
// resize window
OnResize(sender, e);
return;
}
internal static void TraceImage
(
Pdf417Decoder Pdf417Decoder,
int CenterX,
int CenterY,
int Left,
int Top,
int Right,
int Bottom
)
{
int Width = Left + Right + 1;
int Height = Top + Bottom + 1;
int OrgX = CenterX - Left;
int OrgY = CenterY - Top;
char[] Line = new char[Width + 1];
for (int Y = 0; Y < Height; Y++)
{
Line[0] = Y == Top ? '>' : ' ';
int R = OrgY + Y;
for (int X = 0; X < Width; X++)
{
int C = OrgX + X;
if (R < 0 || R >= Pdf417Decoder.ImageHeight || C < 0 || C >= Pdf417Decoder.ImageWidth)
{
Line[X + 1] = ' ';
}
else
{
Line[X + 1] = Pdf417Decoder.ImageMatrix[R, C] ? 'X' : '.';
}
}
Pdf417Trace.Write(new string(Line));
}
return;
}
/// <summary>
/// Program initialization
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="e">Event arguments</param>
private void OnLoad(object sender, EventArgs e)
{
// program title
Text = "Pdf417VideoDecoder - " + Pdf417Decoder.VersionNumber + " \u00a9 2019 Uzi Granot. All rights reserved.";
#if DEBUG
// current directory
string CurDir = Environment.CurrentDirectory;
string WorkDir = CurDir.Replace("bin\\Debug", "Work");
if (WorkDir != CurDir && Directory.Exists(WorkDir))
{
Environment.CurrentDirectory = WorkDir;
}
// open trace file
Pdf417Trace.Open("Pdf417VideoDecoderTrace.txt");
Pdf417Trace.Write(Text);
#endif
// disable reset button
ResetButton.Enabled = false;
GoToUriButton.Enabled = false;
// get an array of web camera devices
DsDevice[] CameraDevices = DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);
// make sure at least one is available
if (CameraDevices == null || CameraDevices.Length == 0)
{
MessageBox.Show("No video cameras in this computer");
Close();
return;
}
// select the first camera
DsDevice CameraDevice = CameraDevices[0];
// Device moniker
IMoniker CameraMoniker = CameraDevice.Moniker;
// get a list of frame sizes available
FrameSize[] FrameSizes = Camera.GetFrameSizeList(CameraMoniker);
// make sure there is at least one frame size
if (FrameSizes == null || FrameSizes.Length == 0)
{
MessageBox.Show("No video cameras in this computer");
Close();
return;
}
// test if our frame size is available
int Index;
for (Index = 0; Index < FrameSizes.Length &&
(FrameSizes[Index].Width != FrameSize.Width || FrameSizes[Index].Height != FrameSize.Height); Index++)
{
;
}
// select first frame size
if (Index == FrameSizes.Length)
{
FrameSize = FrameSizes[0];
}
// Set selected camera to camera control with default frame size
// Create camera object
VideoCamera = new Camera(PreviewPanel, CameraMoniker, FrameSize);
// create QR code decoder
Decoder = new Pdf417Decoder();
// resize window
OnResize(sender, e);
// create timer
VideoDecoderTimer = new Timer();
VideoDecoderTimer.Interval = 200;
VideoDecoderTimer.Tick += VideoDecoderTimer_Tick;
VideoDecoderTimer.Enabled = true;
return;
}