- added EMF support

- increased reliablitity of the scanner

BarcodeGenerator/EmfBarcodeGenerator.cs

@@ -0,0 +1,147 @@
+//
+// Author:
+//   Michael Göricke
+//
+// Copyright (c) 2023
+//
+// This file is part of FocalMaster.
+//
+// The FocalMaster is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see<http://www.gnu.org/licenses/>.
+
+using System;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+
+namespace FocalCompiler
+{
+    internal class EmfBarcodeGenerator : BarcodeGenerator
+    {
+        private const float TopBorder = 0;
+        private const float LeftBorder = 0;
+        private const float ZeroBarWidth = 2;
+        private const float OneBarWidth = 2 * ZeroBarWidth;
+        private const float GapBarWidth = ZeroBarWidth;
+        private const float BarHeight = 33;
+        private const double RowsPerPage = 19;
+
+        /////////////////////////////////////////////////////////////
+
+        private string imageBaseFilename;
+        private Metafile metafile;
+        private Graphics graphics;
+        private int currentPage;
+        private int currentRowOnPage;
+        private float currentY;
+        private float currentX;
+
+        /////////////////////////////////////////////////////////////
+
+        public bool GenerateEmf(string focal, string outputBaseFilename)
+        {
+            imageBaseFilename = Path.Combine(Path.GetDirectoryName(outputBaseFilename), Path.GetFileNameWithoutExtension(outputBaseFilename));
+            currentPage = 1;
+
+            return Generate(focal, false);
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        protected override void Save()
+        {
+            if (graphics == null)
+            {
+                return;
+            }
+
+            graphics.Dispose();
+            metafile.Dispose();
+
+            graphics = null;
+            metafile = null;
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        private void InitImage()
+        {
+            Bitmap bitmap = new Bitmap(16, 16);
+            Graphics referenceGraphics = Graphics.FromImage(bitmap);
+            IntPtr referenceHdc = referenceGraphics.GetHdc();
+
+            metafile = new Metafile(imageBaseFilename + "-" + currentPage.ToString() + ".emf", referenceHdc, EmfType.EmfOnly);
+
+            referenceGraphics.ReleaseHdc(referenceHdc);
+            referenceGraphics.Dispose();
+            bitmap.Dispose();
+
+            graphics = Graphics.FromImage(metafile);
+
+            currentY = TopBorder;
+            currentRowOnPage = 0;
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        protected override void BeginBarcodeRow(int currentRow, int fromLine, int toLine)
+        {
+            if (graphics == null)
+            {
+                InitImage();
+            }
+
+            string s = string.Format("Row {0} ({1} - {2})", currentRow, fromLine, toLine);
+
+            Font drawFont = new Font("Arial", 9);
+            SolidBrush drawBrush = new SolidBrush(Color.Black);
+
+            graphics.DrawString(s, drawFont, drawBrush, new PointF(LeftBorder, currentY + 3));
+
+            currentY += drawFont.Height + 2;
+            currentX = LeftBorder;
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        protected override void EndBarcodeRow()
+        {
+            currentY += BarHeight;
+            currentRowOnPage++;
+
+            if (currentRowOnPage >= RowsPerPage)
+            {
+                Save();
+                currentPage++;
+            }
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        protected override void AddZeroBar()
+        {
+            graphics.FillRectangle(Brushes.Black, currentX, currentY, ZeroBarWidth, BarHeight);
+
+            currentX += ZeroBarWidth + GapBarWidth;
+        }
+
+        /////////////////////////////////////////////////////////////
+
+        protected override void AddOneBar()
+        {
+            graphics.FillRectangle(Brushes.Black, currentX, currentY, OneBarWidth, BarHeight);
+
+            currentX += OneBarWidth + GapBarWidth;
+        }
+    }
+}

BarcodeGenerator/ImageBarcodeGenerator.cs

@@ -19,13 +19,11 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program. If not, see<http://www.gnu.org/licenses/>.
 
-using System;
 using System.Globalization;
 using System.IO;
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
-using static System.Net.Mime.MediaTypeNames;
 
 namespace FocalCompiler
 {