Changeset 5119 for geovis

Timestamp:

Mar 11, 2015, 3:11:07 AM (10 years ago)

Author:

ldelgass

Message:

Add legend option for blending against a background color

Location:

geovis/trunk

Files:

• ColorMap.cpp (modified) (5 diffs)
• RendererCmd.cpp (modified) (2 diffs)
• geovis_protocol.txt (modified) (1 diff)

geovis/trunk/ColorMap.cpp

@@ -34 +34 @@
             float x = (float)i/(height-1);
             float val = min + (max - min) * x;
-            osg::Vec4f rgb = map->getColor(val);
+            osg::Vec4f rgba = map->getColor(val);
+            float opacity = rgba[3];
             unsigned char color[3];
             if (opaque) {
-                color[0] = (unsigned char)(255. * (bgr ? rgb[2] : rgb[0]));
-                color[1] = (unsigned char)(255. * rgb[1]);
-                color[2] = (unsigned char)(255. * (bgr ? rgb[0] : rgb[2]));
+                color[0] = (unsigned char)(255. * (bgr ? rgba[2] : rgba[0]));
+                color[1] = (unsigned char)(255. * rgba[1]);
+                color[2] = (unsigned char)(255. * (bgr ? rgba[0] : rgba[2]));
             } else {
-                float opacity = rgb[3];
-                color[0] = (unsigned char)(255. * (bgColor[0] * (1.0 - opacity) + (bgr ? rgb[2] : rgb[0]) * opacity));
-                color[1] = (unsigned char)(255. * (bgColor[1] * (1.0 - opacity) + rgb[1] * opacity));
-                color[2] = (unsigned char)(255. * (bgColor[2] * (1.0 - opacity) + (bgr ? rgb[0] : rgb[2]) * opacity));
+                color[0] = (unsigned char)(255. * (bgColor[0] * (1.0 - opacity) + (bgr ? rgba[2] : rgba[0]) * opacity));
+                color[1] = (unsigned char)(255. * (bgColor[1] * (1.0 - opacity) + rgba[1] * opacity));
+                color[2] = (unsigned char)(255. * (bgColor[2] * (1.0 - opacity) + (bgr ? rgba[0] : rgba[2]) * opacity));
             }
             for (int j = 0; j < width; j++) {
@@ -50 +50 @@
                 dst += 3;
                 if (bytesPerPixel == 4) {
-                    *(dst++) = (unsigned char)255.;
+                    *(dst++) = (unsigned char)(255. * (opaque ? 1.0 : opacity));
                 }
             }
@@ -60 +60 @@
                 float val = min + (max - min) * x;
                 osg::Vec4f rgb = map->getColor(val);
+                double opacity = rgb[3];
                 unsigned char color[3];
                 if (opaque) {
@@ -66 +67 @@
                     color[2] = (unsigned char)(255. * (bgr ? rgb[0] : rgb[2]));
                 } else {
-                    double opacity = rgb[3];
                     color[0] = (unsigned char)(255. * (bgColor[0] * (1.0 - opacity) + (bgr ? rgb[2] : rgb[0]) * opacity));
                     color[1] = (unsigned char)(255. * (bgColor[1] * (1.0 - opacity) + rgb[1] * opacity));
@@ -74 +74 @@
                 dst += 3;
                 if (bytesPerPixel == 4) {
-                    *(dst++) = (unsigned char)255.;
+                    *(dst++) = (unsigned char)(255. * (opaque ? 1.0 : opacity));
                 }
             }

geovis/trunk/RendererCmd.cpp

@@ -743 +743 @@
           Tcl_Obj *const *objv)
 {
-    if (objc != 4) {
+    if (objc < 4) {
         Tcl_AppendResult(interp, "wrong # args: should be \"",
                 Tcl_GetString(objv[0]), " colormapName width height\"", (char*)NULL);
@@ -755 +755 @@
         return TCL_ERROR;
     }
-
     bool opaque = true;
+    if (objc > 4) {
+        if (GetBooleanFromObj(interp, objv[4], &opaque) != TCL_OK) {
+            return TCL_ERROR;
+        }
+    }
     float bgColor[3];
-    memset(bgColor, 0, sizeof(float)*3);
+    if (objc > 5) {
+        if (GetFloatFromObj(interp, objv[5], &bgColor[0]) != TCL_OK ||
+            GetFloatFromObj(interp, objv[6], &bgColor[1]) != TCL_OK ||
+            GetFloatFromObj(interp, objv[7], &bgColor[2]) != TCL_OK) {
+            return TCL_ERROR;
+        }
+    } else {
+        memset(bgColor, 0, sizeof(float)*3);
+    }
     osg::ref_ptr<osg::Image> imgData = new osg::Image();
 

geovis/trunk/geovis_protocol.txt

@@ -85 +85 @@
          <numberOfTableEntries> = integer or "default"
 
+legend <colormapName> <w> <h> <?opaque?> <?bgR?> <?bgG?> <?bgB?>
+       Render a legend colorbar.
+       <colormapName> - Name of the colormap defined with the colormap command
+       <w>,<h> - width and height of colorbar
+       <opaque> - If false, blend with background color
+       <bgR>,<bgG>,<bgB> - Background color (defaults to black)
+
 renderer render
          Force a new image to be rendered