Parse a background color from getdown.txt, or figure out a sensible one.

Always fill the component with that, in case there's trouble with the
background image.

src/main/java/com/threerings/getdown/data/Application.java

@@ -137,6 +137,9 @@ public class Application
         /** The human readable name of this application. */
         public String name;
 
+        /** A background color, just in case. */
+        public Color background;
+
         /** Background image specifiers for {@link RotatingBackgrounds}. */
         public String[] rotatingBackgrounds;
 
@@ -188,10 +191,10 @@ public class Application
         @Override
         public String toString ()
         {
-            return "[name=" + name + ", bg=" + backgroundImage + ", pi=" + progressImage +
-                ", prect=" + progress + ", pt=" + progressText + ", pb=" + progressBar +
-                ", srect=" + status + ", st=" + statusText + ", shadow=" + textShadow +
-                ", err=" + installError + ", nrect=" + patchNotes +
+            return "[name=" + name + ", bg=" + background + ", bg=" + backgroundImage +
+                ", pi=" + progressImage + ", prect=" + progress + ", pt=" + progressText +
+                ", pb=" + progressBar + ", srect=" + status + ", st=" + statusText +
+                ", shadow=" + textShadow + ", err=" + installError + ", nrect=" + patchNotes +
                 ", notes=" + patchNotesUrl + ", stepPercentages=" + stepPercentages + "]";
         }
 
@@ -656,6 +659,14 @@ public class Application
         if (ui.backgroundImage == null) { // support legacy format
             ui.backgroundImage = (String)cdata.get("ui.background");
         }
+        // and now ui.background can refer to the background color, but fall back to black
+        // or white, depending on the brightness of the progressText
+        Color defaultBackground = (.5f < Color.RGBtoHSB(
+                ui.progressText.getRed(), ui.progressText.getGreen(), ui.progressText.getBlue(),
+                null)[2])
+            ? Color.BLACK
+            : Color.WHITE;
+        ui.background = parseColor(cdata, "ui.background", defaultBackground);
         ui.progressImage = (String)cdata.get("ui.progress_image");
         ui.rotatingBackgrounds = ConfigUtil.getMultiValue(cdata, "ui.rotating_background");
         ui.iconImages = ConfigUtil.getMultiValue(cdata, "ui.icon");

src/main/java/com/threerings/getdown/launcher/StatusPanel.java

@@ -184,6 +184,10 @@ public class StatusPanel extends JComponent
         super.paintComponent(g);
         Graphics2D gfx = (Graphics2D)g;
 
+        // always draw a background in case our image isn't ready yet
+        gfx.setColor(_ifc.background);
+        gfx.fillRect(0, 0, getWidth(), getHeight());
+        // then attempt to draw a background image...
         Image img;
         if (_displayError) {
             img = _bg.getErrorImage();
@@ -192,9 +196,6 @@ public class StatusPanel extends JComponent
         }
         if (img != null) {
             gfx.drawImage(img, 0, 0, this);
-        } else {
-            gfx.setColor(getBackground());
-            gfx.fillRect(0, 0, getWidth(), getHeight());
         }
 
         Object oalias = SwingUtil.activateAntiAliasing(gfx);