1 files changed, 14 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
index 4622d6975..a2d202d11 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
@@ -52,6 +52,7 @@ public class ImageSequence implements TextureSequence {
     private final int[] texWrapST = { GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE };
     private volatile int frameIdx = 0;
     private volatile boolean manualStepping = false;
+    private int textureFragmentShaderHashCode = 0;
 
     public ImageSequence(final int textureUnit, final boolean useBuildInTexLookup) {
         this.textureUnit = textureUnit;
@@ -173,4 +174,17 @@ public class ImageSequence implements TextureSequence {
           "  return texture2D(image, texCoord);\n"+
           "}\n\n";
     }
+
+    @Override
+    public int getTextureFragmentShaderHashCode() {
+        if( !isTextureAvailable() ) {
+            textureFragmentShaderHashCode = 0;
+            return 0;
+        } else if( 0 == textureFragmentShaderHashCode ) {
+            int hash = 31 + getTextureLookupFragmentShaderImpl().hashCode();
+            hash = ((hash << 5) - hash) + getTextureSampler2DType().hashCode();
+            textureFragmentShaderHashCode = hash;
+        }
+        return textureFragmentShaderHashCode;
+    }
 }