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Added a QR-Code demo: press q, when your screenshot has a QR Code, when selecting a region and see some additional information.

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This commit is contained in:
Robin Krom 2020-02-21 22:38:25 +01:00
commit ea0174c9c3
2 changed files with 46 additions and 1 deletions
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46
Greenshot/Forms/CaptureForm.cs
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@ -31,6 +31,7 @@ using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Globalization;
using System.Linq;
using System.Security.Permissions;
using System.Threading;
using System.Threading.Tasks;
@ -38,6 +39,7 @@ using System.Windows.Forms;
using System.Windows.Threading;
using GreenshotPlugin.IniFile;
using GreenshotPlugin.Interfaces;
using ZXing;
namespace Greenshot.Forms {
/// <summary>
@ -321,10 +323,52 @@ namespace Greenshot.Forms {
}
}
break;
case Keys.Q:
// create a barcode reader instance
IBarcodeReader reader = new BarcodeReader();
// detect and decode the barcode inside the bitmap
var result = reader.Decode((Bitmap)_capture.Image);
// do something with the result
if (result != null)
{
Log.InfoFormat("Found QR of type {0} - {1}", result.BarcodeFormat, result.Text);
using var graphics = Graphics.FromImage(_capture.Image);
var boundingBox = BoundingBox(result.ResultPoints.Select(p => new Point((int) p.X, (int) p.Y)));
using var pen = new Pen(Color.BlueViolet, 10);
using var solidBrush = new SolidBrush(Color.Green);
using var solidWhiteBrush = new SolidBrush(Color.White);
using var font = new Font(FontFamily.GenericSerif, 12, FontStyle.Regular);
graphics.FillRectangle(solidWhiteBrush, boundingBox);
graphics.DrawRectangle(pen, boundingBox);
graphics.DrawString(result.Text, font, solidBrush, boundingBox);
}
break;
}
}
/// <summary>
/// <summary>
/// Find the list's bounding box.
/// </summary>
/// <param name="points">IEnumerable of Point</param>
/// <returns>Rectangle</returns>
private Rectangle BoundingBox(IEnumerable<Point> points)
{
var x_query = from Point p in points select p.X;
int xmin = x_query.Min();
int xmax = x_query.Max();
var y_query = from Point p in points select p.Y;
int ymin = y_query.Min();
int ymax = y_query.Max();
return new Rectangle(xmin, ymin, xmax - xmin, ymax - ymin);
}
/// <summary>
/// The mousedown handler of the capture form
/// </summary>
/// <param name="sender"></param>