ColorUtil: fix modHSV, Color: HSV (#673)

2019-02-23 01:38:33 +01:00
parent 2efa8808c0
commit 627a316e4d
5 changed files with 183 additions and 21 deletions
--- a/vtm-tests/test/org/oscim/utils/ColorTest.java
+++ b/vtm-tests/test/org/oscim/utils/ColorTest.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2019 Gustl22
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.utils;
+
+import org.junit.Test;
+import org.oscim.backend.canvas.Color;
+
+import java.awt.Desktop;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.oscim.backend.canvas.Color.b;
+import static org.oscim.backend.canvas.Color.g;
+import static org.oscim.backend.canvas.Color.r;
+
+public class ColorTest {
+
+    // See: https://en.wikipedia.org/wiki/ANSI_escape_code
+    public static final String ANSI_RESET = "\033[0m";
+    public static final String ANSI_PREFIX_BACKGROUND_24Bit = "\033[48;2;";
+    public static final String ANSI_PREFIX_FOREGROUND_24Bit = "\033[38;2;";
+
+    @Test
+    public void testColorHSV() {
+        List<Integer> colors = initHSVTest();
+        for (int color : colors) {
+            // Try to display them in terminal (Intellij not supports 24 bit colors)
+            System.out.println(ANSI_PREFIX_BACKGROUND_24Bit + Color.r(color) + ";" + Color.g(color) + ";" + Color.b(color) + "m "
+                    + Color.toString(color) + "\t" + (new Color.HSV(ColorUtil.rgbToHsv(r(color), g(color), b(color)))).toString()
+                    + ANSI_RESET);
+        }
+    }
+
+    public List<Integer> initHSVTest() {
+        List<Integer> colors = new ArrayList<>();
+        int color;
+
+        // Hue
+        color = Color.get(255, 0, 0);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0.33f, 1f, 1f, false));
+
+        color = Color.get(0, 0, 255);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0.33f, 1f, 1f, false));
+
+        // Saturation
+        color = Color.get(255, 200, 200);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0f, 1.5f, 1f, false));
+
+        color = Color.get(255, 0, 0);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0f, 0.5f, 1f, false));
+
+        // Lightness (value)
+        color = Color.get(255, 255, 255);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0f, 1f, 0.8f, false));
+
+        color = Color.get(0, 0, 0);
+        colors.add(color);
+        colors.add(ColorUtil.modHsv(color, 0f, 1f, 1.5f, false));
+
+        return colors;
+    }
+
+    private void displayHSVColorsInBrowser(List<Integer> colors) {
+        try {
+            File tempFile;
+            tempFile = File.createTempFile("test-color-", ".html");
+            tempFile.deleteOnExit();
+            StringBuilder builder = new StringBuilder("<html>");
+
+            for (int color : colors) {
+                builder.append(String.format("<div><pre style=\"background:rgb(%s,%s,%s);margin:0;\">", Color.r(color), Color.g(color), Color.b(color)));
+                builder.append(Color.toString(color));
+                builder.append("\t");
+                builder.append((new Color.HSV(ColorUtil.rgbToHsv(r(color), g(color), b(color)))).toString());
+                builder.append("</pre></div>");
+            }
+            builder.append("</html>");
+
+            BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
+            writer.write(builder.toString());
+            writer.close();
+
+            Desktop.getDesktop().browse(tempFile.toURI());
+
+            Thread.sleep(2000);
+        } catch (IOException e) {
+            e.printStackTrace();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void main(String[] args) {
+        ColorTest test = new ColorTest();
+        List<Integer> colors = test.initHSVTest();
+        test.displayHSVColorsInBrowser(colors);
+    }
+}