init

2024-03-06 14:54:30 +08:00
commit edac2715f0
1525 changed files with 809982 additions and 0 deletions
--- a/lib/engine/rs_color.cpp
+++ b/lib/engine/rs_color.cpp
@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2020 A. Stebich (librecad@mail.lordofbikes.de)
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
+**
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file gpl-2.0.txt included in the
+** packaging of this file.
+**
+** 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, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+**
+** This copyright notice MUST APPEAR in all copies of the script!
+**
+**********************************************************************/
+
+
+#include <iostream>
+#include <cmath>
+#include "rs_color.h"
+
+//This method is used for plugins
+int RS_Color::toIntColor(void) const {
+    if (isByLayer())
+        return -1;
+    if (isByBlock())
+        return -2;
+//    int tmp1 = red() << 16;
+//    int tmp2 = green() << 8;
+//    int tmp3 = tmp1+tmp2+blue();
+    int cd = (red() << 16) + (green() << 8) + blue();
+        return cd;
+
+}
+
+//This method is used for plugins
+void RS_Color::fromIntColor(int co) {
+    if (co == -1)
+        setFlags(RS2::FlagByLayer);
+    else if (co == -2)
+        setFlags(RS2::FlagByBlock);
+    else {
+        setRed((co >> 16) & 0xFF);
+        setGreen((co >> 8) & 0xFF);
+        setBlue(co & 0xFF);
+    }
+
+}
+
+/**
+ * Color distance
+ *
+ * Calculate distance between two RGB colors using low-cost approximation of
+ * human eye response by Thiadmer Riemersma. Formula explanation found here:
+ * https://www.compuphase.com/cmetric.htm
+ *
+ * @author Thiadmer Riemersma
+ * @author Jeremy Ruhland
+ *
+ * @param c Color to perform comparison against
+ *
+ * @return Distance between colors in percent, value ranging from 0 (identical)
+ *         to 100 (maximum difference)
+ */
+int RS_Color::colorDistance(const RS_Color& c) const {
+
+    int myRed {red()};
+    int otherRed {c.red()};
+    int redMean {(myRed + otherRed) / 2};
+
+    // Convert difference value to percentage using maximum color difference (764.834 / 100)
+    return std::lround( std::sqrt( std::pow(otherRed - myRed, 2) * (512 + redMean) / 256
+                                   + std::pow(c.green() - green(), 2) * 4
+                                   + std::pow(c.blue() - blue(), 2) * (767 - redMean) / 256)
+                        / 7.64834);
+}
+
+std::ostream& operator << (std::ostream& os, const RS_Color& c) {
+       os << " color: " << c.name().toLatin1().data()
+       << " flags: " << (c.getFlag(RS2::FlagByLayer) ? "RS2::FlagByLayer " : "")
+       << (c.getFlag(RS2::FlagByBlock) ? "RS2::FlagByBlock " : "");
+       return os;
+}