Changeset 38146

Timestamp:

Apr 17, 2015, 3:06:54 PM (11 years ago)

Author:

eugene

Message:

add option to load user-defined colormap; add vista-like colormap

Location:

branches/eam_branches/ipp-20150405/Ohana/src/kapa2

Files:

• doc/rainbow.cm (added)
• doc/vista.cm (added)
• src/SetColormap.c (modified) (1 diff)

branches/eam_branches/ipp-20150405/Ohana/src/kapa2/src/SetColormap.c

@@ -205 +205 @@
     goto store_colors;
   }
+
+  /* anuenue */
+  if (!strncmp (name, "file:", 5)) {
+    FILE *f = fopen (&name[5], "r");
+    if (!f) {
+      fprintf (stderr, "failed to open colormap file %s\n", &name[5]);
+      return FALSE;
+    }
+    char line[1024];
+
+    int lastIndex = 0;
+    float lastRed = 0.0;
+    float lastBlue = 0.0;
+    float lastGreen = 0.0;
+
+    float fracIndex, fracRed, fracBlue, fracGreen;
+
+    while (scan_line_maxlen (f, line, 1024) != EOF) {
+      // file contains f R G B : f = 0.0 - 1.0, R,G,B = 0.0 - 1.0
+      int Nscan = sscanf (line, "%f %f %f %f", &fracIndex, &fracRed, &fracBlue, &fracGreen);
+      if (Nscan != 4) continue;
+
+      int nextIndex = fracIndex * MaxValue;
+      if (nextIndex <= lastIndex) {
+        lastRed = fracRed;
+        lastBlue = fracBlue;
+        lastGreen = fracGreen;
+        continue;
+      }
+      float dRdI = (fracRed   - lastRed)   / (float) (nextIndex - lastIndex);
+      float dBdI = (fracBlue  - lastBlue)  / (float) (nextIndex - lastIndex);
+      float dGdI = (fracGreen - lastGreen) / (float) (nextIndex - lastIndex);
+      for (i = lastIndex; i < nextIndex; i++) {
+        float redValue   = 0xffff * (dRdI * (i - lastIndex) + lastRed);
+        float blueValue  = 0xffff * (dBdI * (i - lastIndex) + lastBlue);
+        float greenValue = 0xffff * (dGdI * (i - lastIndex) + lastGreen);
+        SETVALUE (graphic[0].cmap[i].red,   redValue,   0, 0xffff);
+        SETVALUE (graphic[0].cmap[i].blue,  blueValue,  0, 0xffff);
+        SETVALUE (graphic[0].cmap[i].green, greenValue, 0, 0xffff);
+      }
+      lastRed = fracRed;
+      lastBlue = fracBlue;
+      lastGreen = fracGreen;
+      lastIndex = nextIndex;
+    }
+    fclose (f);
+
+    if ((int) (MaxValue*fracIndex) < MaxValue) {
+      float dRdI = (1.0 - lastRed)   / (float) (MaxValue - lastIndex);
+      float dBdI = (1.0 - lastBlue)  / (float) (MaxValue - lastIndex);
+      float dGdI = (1.0 - lastGreen) / (float) (MaxValue - lastIndex);
+      for (i = lastIndex; i < MaxValue; i++) {
+        float redValue   = 0xffff * (dRdI * (i - lastIndex) + lastRed);
+        float blueValue  = 0xffff * (dBdI * (i - lastIndex) + lastBlue);
+        float greenValue = 0xffff * (dGdI * (i - lastIndex) + lastGreen);
+        SETVALUE (graphic[0].cmap[i].red,   redValue,   0, 0xffff);
+        SETVALUE (graphic[0].cmap[i].blue,  blueValue,  0, 0xffff);
+        SETVALUE (graphic[0].cmap[i].green, greenValue, 0, 0xffff);
+      }
+    }
+    goto store_colors;
+  }
+
   return (FALSE);