Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 101 insertions, 0 deletions

diff --git a/include/convert_to_biu.h b/include/convert_to_biu.h
new file mode 100644
index 0000000..646a319
--- /dev/null
+++ b/include/convert_to_biu.h
@@ -0,0 +1,101 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2012-2014 Jean-Pierre Charras, jp.charras at wanadoo.fr
+ * Copyright (C) 1992-2014 KiCad Developers, see CHANGELOG.TXT for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef CONVERT_TO_BIU_H_
+#define CONVERT_TO_BIU_H_
+
+/**
+ * @file convert_to_biu.h
+ */
+
+
+/**
+ * @brief some define and functions to convert a value in mils, decimils or mm
+ * to the internal unit used in pcbnew, cvpcb or gerbview (nanometer or deci-mil)
+ * depending on compile time option
+ */
+
+
+
+/// Scaling factor to convert mils to internal units.
+#if defined(PCBNEW) || defined(CVPCB) || defined(GERBVIEW)
+ #if defined(GERBVIEW)
+  #define IU_PER_MM        1e5     // Gerbview IU is 10 nanometers.
+ #else
+  #define IU_PER_MM        1e6     // Pcbnew IU is 1 nanometer.
+ #endif
+ #define IU_PER_MILS       (IU_PER_MM * 0.0254)
+ #define IU_PER_DECIMILS   (IU_PER_MM * 0.00254)
+
+/// Convert mils to PCBNEW internal units (iu).
+inline int Mils2iu( int mils )
+{
+    double x = mils * IU_PER_MILS;
+    return int( x < 0 ? x - 0.5 : x + 0.5 );
+}
+
+/// Convert deci-mils to PCBNEW internal units (iu).
+inline int DMils2iu( int dmils )
+{
+    double x = dmils * IU_PER_DECIMILS;
+    return int( x < 0 ? x - 0.5 : x + 0.5 );
+}
+
+#elif defined (PL_EDITOR)
+#define IU_PER_MM           1e3 // internal units in micron (should be enough)
+#define IU_PER_MILS       (IU_PER_MM * 0.0254)
+#define IU_PER_DECIMILS   (IU_PER_MM * 0.00254)
+/// Convert mils to page layout editor internal units (iu).
+inline int Mils2iu( int mils )
+{
+    double x = mils * IU_PER_MILS;
+    return int( x < 0 ? x - 0.5 : x + 0.5 );
+}
+
+/// Convert deci-mils to page layout editor internal units (iu).
+inline int DMils2iu( int dmils )
+{
+    double x = dmils * IU_PER_DECIMILS;
+    return int( x < 0 ? x - 0.5 : x + 0.5 );
+}
+
+#else            // Eeschema and anything else.
+#define IU_PER_DECIMILS     0.1
+#define IU_PER_MILS         1.0
+#define IU_PER_MM           (IU_PER_MILS / 0.0254)
+
+inline int Mils2iu( int mils )
+{
+    return mils;
+}
+#endif
+
+/// Convert mm to internal units (iu).
+inline int Millimeter2iu( double mm )
+{
+    return (int) ( mm < 0 ? mm * IU_PER_MM - 0.5 : mm * IU_PER_MM + 0.5);
+}
+
+
+#endif  // CONVERT_TO_BIU_H_