Handle true color terminal control codes

whydoubt · whydoubt · commit 261cf620e323 · 2017-06-01T08:52:03.000-05:00
diff --git a/app/src/main/java/de/mud/terminal/VDUBuffer.java b/app/src/main/java/de/mud/terminal/VDUBuffer.java
@@ -104,6 +104,12 @@ public class VDUBuffer {
   public final static long COLOR_FG = 0x7fffffc0L;       /* 0000 0000 0000 0000 0000 0000 0000 0000  0111 1111 1111 1111 1111 1111 1100 0000 */
   /** background color mask */
   public final static long COLOR_BG = 0xffffff80000000L; /* 0000 0000 1111 1111 1111 1111 1111 1111  1000 0000 0000 0000 0000 0000 0000 0000 */
+  /** how much to left shift the red component */
+  public final static int COLOR_RED_SHIFT = 16;
+  /** how much to left shift the green component */
+  public final static int COLOR_GREEN_SHIFT = 8;
+  /** how much to left shift the blue component */
+  public final static int COLOR_BLUE_SHIFT = 0;
 
   /**
    * Create a new video display buffer with the passed width and height in
diff --git a/app/src/main/java/de/mud/terminal/vt320.java b/app/src/main/java/de/mud/terminal/vt320.java
@@ -2971,6 +2971,13 @@ else if (R >= height)
                     attributes &= ~COLOR_FG;
                     attributes |= (long)((DCEvars[i + 2]) + 1) << COLOR_FG_SHIFT;
                     i += 2;
+                  } else if (DCEvars[i+1] == 2) {
+                    attributes &= ~COLOR_FG;
+                    int newcolor = DCEvars[i + 2] << COLOR_RED_SHIFT |
+                                   DCEvars[i + 3] << COLOR_GREEN_SHIFT |
+                                   DCEvars[i + 4] << COLOR_BLUE_SHIFT;
+                    attributes |= (long)(newcolor + 257) << COLOR_FG_SHIFT;
+                    i += 4;
                   }
                   break;
                 case 39:
@@ -2992,6 +2999,13 @@ else if (R >= height)
                     attributes &= ~COLOR_BG;
                     attributes |= (long)(DCEvars[i + 2] + 1) << COLOR_BG_SHIFT;
                     i += 2;
+                  } else if (DCEvars[i+1] == 2) {
+                    attributes &= ~COLOR_BG;
+                    int newcolor = DCEvars[i + 2] << COLOR_RED_SHIFT |
+                                   DCEvars[i + 3] << COLOR_GREEN_SHIFT |
+                                   DCEvars[i + 4] << COLOR_BLUE_SHIFT;
+                    attributes |= (long)(newcolor + 257) << COLOR_BG_SHIFT;
+                    i += 4;
                   }
                   break;
                 case 49:
