1 files changed, 88 insertions, 0 deletions
diff --git a/awt/org/apache/harmony/x/imageio/plugins/png/PNGImageReaderSpi.java b/awt/org/apache/harmony/x/imageio/plugins/png/PNGImageReaderSpi.java
new file mode 100644
index 0000000..50f8b10
--- /dev/null
+++ b/awt/org/apache/harmony/x/imageio/plugins/png/PNGImageReaderSpi.java
@@ -0,0 +1,88 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+
+package org.apache.harmony.x.imageio.plugins.png;
+
+import org.apache.harmony.x.imageio.plugins.jpeg.JPEGSpiConsts;
+
+import javax.imageio.spi.ImageReaderSpi;
+import javax.imageio.spi.ServiceRegistry;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+import java.io.IOException;
+import java.util.Locale;
+
+public class PNGImageReaderSpi extends ImageReaderSpi {
+    static final String PNG_NAMES[] = new String[] {"png", "PNG"};
+    static final String PNG_SUFFIXES[] = new String[] {"png"};
+    static final String PNG_MIME_TYPES[] = new String[] {"image/png"};
+    static final String PNG_READER_CLASS_NAME = "org.apache.harmony.x.imageio.plugins.png.PNGImageReader";
+    static final String PNG_READER_SPI_NAMES[] = {"org.apache.harmony.x.imageio.plugins.png.PNGImageReaderSpi"};
+
+    public PNGImageReaderSpi() {
+        super(
+                JPEGSpiConsts.vendorName, JPEGSpiConsts.version,
+                PNG_NAMES, PNG_SUFFIXES,
+                PNG_MIME_TYPES, PNG_READER_CLASS_NAME,
+                STANDARD_INPUT_TYPE, null,
+                false, null,
+                null, null,
+                null, false, 
+                null, null,
+                null, null
+        );
+    }
+
+    @Override
+    public boolean canDecodeInput(Object source) throws IOException {
+        ImageInputStream markable = (ImageInputStream) source;
+        markable.mark();
+
+        byte[] signature = new byte[8];
+        markable.seek(0);
+
+        int nBytes = markable.read(signature, 0, 8);
+        if(nBytes != 8) markable.read(signature, nBytes, 8-nBytes);
+        markable.reset();
+
+        // PNG signature: 137 80 78 71 13 10 26 10
+        return  (signature[0] & 0xFF) == 137 &&
+                (signature[1] & 0xFF) == 80 &&
+                (signature[2] & 0xFF) == 78 &&
+                (signature[3] & 0xFF) == 71 &&
+                (signature[4] & 0xFF) == 13 &&
+                (signature[5] & 0xFF) == 10 &&
+                (signature[6] & 0xFF) == 26 &&
+                (signature[7] & 0xFF) == 10;
+    }
+
+    @Override
+    public ImageReader createReaderInstance(Object extension) throws IOException {
+        return new PNGImageReader(this);
+    }
+
+    @Override
+    public String getDescription(Locale locale) {
+        return "DRL PNG decoder";
+    }
+
+    @Override
+    public void onRegistration(ServiceRegistry registry, Class<?> category) {
+        super.onRegistration(registry, category);
+    }
+}