X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Frenderer%2Fseqfeatures%2FFeatureColourFinder.java;h=712c9f445f20ef6d3ad6eb45b1d85e4dee10814a;hb=45b405507491a3d15d2b6b2c4f115a840945b28f;hp=703f220efa4acd60e4c2869425b0236ea17a45b3;hpb=07179fa211fc224a57afbb79f6e8239f36fbf6f0;p=jalview.git

diff --git a/src/jalview/renderer/seqfeatures/FeatureColourFinder.java b/src/jalview/renderer/seqfeatures/FeatureColourFinder.java
index 703f220..712c9f4 100644
--- a/src/jalview/renderer/seqfeatures/FeatureColourFinder.java
+++ b/src/jalview/renderer/seqfeatures/FeatureColourFinder.java
@@ -23,10 +23,12 @@ package jalview.renderer.seqfeatures;
 import jalview.api.FeatureRenderer;
 import jalview.api.FeaturesDisplayedI;
 import jalview.datamodel.SequenceI;
+import jalview.util.Platform;
 import jalview.viewmodel.seqfeatures.FeatureRendererModel;
 
 import java.awt.Color;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.image.BufferedImage;
 
 /**
@@ -117,6 +119,53 @@ public class FeatureColourFinder
     return c;
   }
 
+  public int findFeatureColourInt(int defaultColour, SequenceI seq,
+          int column)
+  {
+    // if (noFeaturesDisplayed())
+    // {
+    // return defaultColour;
+    // }
+
+    Graphics2D g = null;
+
+    /*
+     * if transparency applies, provide a notional 1x1 graphics context 
+     * that has been primed with the default colour
+     */
+    if (featureRenderer.getTransparency() != 1f)
+    {
+      g = (Graphics2D) goff;
+      if (Platform.isJS())
+      {
+        // Clear the HTML5 canvas color.
+        // otherwise we get a smearing.
+        // For whatever reason, this is necessary BH 2019.10.01.
+        g.setColor(Color.white);
+        g.fillRect(0, 0, 1, 1);
+      }
+      if (defaultColour != 0)
+      {
+        offscreenImage.setRGB(0, 0, defaultColour);
+      }
+    }
+    Color c = featureRenderer.findFeatureColour(seq, column + 1, g);
+    if (c == null)
+    {
+      return defaultColour;
+    }
+    if (g == null)
+    {
+      return c.getRGB();
+    }
+    if (Platform.isJS())
+    {
+      // BH 2019.10.01 because for JavaScript the pixel itself
+      // is a resource that needs to be recreated in getRGB(0,0)
+      offscreenImage.flush();
+    }
+    return offscreenImage.getRGB(0, 0);
+  }
   /**
    * Answers true if feature display is turned off, or there are no features
    * configured to be visible