svn commit: r1915285 - /pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java

[ti...@apache.org]

Author: tilman
Date: Wed Jan 17 10:20:03 2024
New Revision: 1915285

URL: http://svn.apache.org/viewvc?rev=1915285&view=rev
Log:
PDFBOX-5754: cache hasBlendMode results

Modified:
    pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java

Modified: pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java
URL: http://svn.apache.org/viewvc/pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java?rev=1915285&r1=1915284&r2=1915285&view=diff
==============================================================================
--- pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java (original)
+++ pdfbox/branches/2.0/pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java Wed Jan 17 10:20:03 2024
@@ -179,6 +179,7 @@ public class PageDrawer extends PDFGraph
     private final RenderingHints renderingHints;
     private final float imageDownscalingOptimizationThreshold;
     private LookupTable invTable = null;
+    private final Map<COSBase,Boolean> blendModeMap = new HashMap<COSBase,Boolean>();
 
     /**
     * Default annotations filter, returns all annotations
@@ -2042,14 +2043,21 @@ public class PageDrawer extends PDFGraph
     {
         if (groupsDone.contains(group.getCOSObject()))
         {
-            // The group was already processed. Avoid endless recursion.
+            // The group is being processed. Avoid endless recursion.
             return false;
         }
         groupsDone.add(group.getCOSObject());
 
+        Boolean val = blendModeMap.get(group.getCOSObject());
+        if (val != null)
+        {
+            return val;
+        }
+
         PDResources resources = group.getResources();
         if (resources == null)
         {
+            blendModeMap.put(group.getCOSObject(), false);
             return false;
         }
         for (COSName name : resources.getExtGStateNames())
@@ -2062,6 +2070,7 @@ public class PageDrawer extends PDFGraph
             BlendMode blendMode = extGState.getBlendMode();
             if (blendMode != BlendMode.NORMAL)
             {
+                blendModeMap.put(group.getCOSObject(), true);
                 return true;
             }
         }
@@ -2081,10 +2090,12 @@ public class PageDrawer extends PDFGraph
             if (xObject instanceof PDTransparencyGroup &&
                 hasBlendMode((PDTransparencyGroup)xObject, groupsDone))
             {
+                blendModeMap.put(group.getCOSObject(), true);
                 return true;
             }
         }
 
+        blendModeMap.put(group.getCOSObject(), false);
         return false;
     }