private void ScanQRCodeItem_Click(object sender, EventArgs e)
{
foreach (Screen screen in Screen.AllScreens)
{
using (Bitmap fullImage = new Bitmap(screen.Bounds.Width,
screen.Bounds.Height))
{
using (Graphics g = Graphics.FromImage(fullImage))
{
g.CopyFromScreen(screen.Bounds.X,
screen.Bounds.Y,
0, 0,
fullImage.Size,
CopyPixelOperation.SourceCopy);
}
int maxTry = 10;
for (int i = 0; i < maxTry; i++)
{
int marginLeft = (int)((double)fullImage.Width * i / 2.5 / maxTry);
int marginTop = (int)((double)fullImage.Height * i / 2.5 / maxTry);
Rectangle cropRect = new Rectangle(marginLeft, marginTop, fullImage.Width - marginLeft * 2, fullImage.Height - marginTop * 2);
Bitmap target = new Bitmap(screen.Bounds.Width, screen.Bounds.Height);
double imageScale = (double)screen.Bounds.Width / (double)cropRect.Width;
using (Graphics g = Graphics.FromImage(target))
{
g.DrawImage(fullImage, new Rectangle(0, 0, target.Width, target.Height),
cropRect,
GraphicsUnit.Pixel);
}
var source = new BitmapLuminanceSource(target);
var bitmap = new BinaryBitmap(new HybridBinarizer(source));
QRCodeReader reader = new QRCodeReader();
var result = reader.decode(bitmap);
if (result != null)
{
var success = controller.AddServerByURL(result.Text);
QRCodeSplashForm splash = new QRCodeSplashForm();
if (success)
{
splash.FormClosed += splash_FormClosed;
}
else if (result.Text.ToLower().StartsWith("http://") || result.Text.ToLower().StartsWith("https://"))
{
_urlToOpen = result.Text;
splash.FormClosed += openURLFromQRCode;
}
else
{
MessageBox.Show(I18N.GetString("Failed to decode QRCode"));
return;
}
double minX = Int32.MaxValue, minY = Int32.MaxValue, maxX = 0, maxY = 0;
foreach (ResultPoint point in result.ResultPoints)
{
minX = Math.Min(minX, point.X);
minY = Math.Min(minY, point.Y);
maxX = Math.Max(maxX, point.X);
maxY = Math.Max(maxY, point.Y);
}
minX /= imageScale;
minY /= imageScale;
maxX /= imageScale;
maxY /= imageScale;
// make it 20% larger
double margin = (maxX - minX) * 0.20f;
minX += -margin + marginLeft;
maxX += margin + marginLeft;
minY += -margin + marginTop;
maxY += margin + marginTop;
splash.Location = new Point(screen.Bounds.X, screen.Bounds.Y);
// we need a panel because a window has a minimal size
// TODO: test on high DPI
splash.TargetRect = new Rectangle((int)minX, (int)minY, (int)maxX - (int)minX, (int)maxY - (int)minY);
splash.Size = new Size(fullImage.Width, fullImage.Height);
splash.Show();
return;
}
}
}
}
MessageBox.Show(I18N.GetString("No QRCode found. Try to zoom in or move it to the center of the screen."));
}