Added test for PICTImageReader to makes sure JPEGs or other images with PICT magic are recognized.

Better Exception handling.

twelvemonkeys-imageio/core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java

@@ -204,7 +204,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> extends
         reader.setInput(null);
     }
 
-    public void testRead() throws IOException {
+    public void testRead() {
         ImageReader reader = createReader();
         for (TestData data : getTestData()) {
             // TODO: Is it required to call reset before setInput?

twelvemonkeys-imageio/pict/src/main/java/com/twelvemonkeys/imageio/plugins/pict/PICTImageReader.java

@@ -191,7 +191,7 @@ public class PICTImageReader extends ImageReaderBase {
 
         // Get frame at 72 dpi
         // NOTE: These are not pixel sizes!
-        // Need sto be multiplied with hRes/screenResolution and vRes/screenResolution
+        // Need to be multiplied with hRes/screenResolution and vRes/screenResolution
         int y = pStream.readUnsignedShort();
         int x = pStream.readUnsignedShort();
         int h = pStream.readUnsignedShort();
@@ -1664,10 +1664,18 @@ public class PICTImageReader extends ImageReaderBase {
             throw e;
         }
         catch (EOFException e) {
-            throw new IIOException("Error in PICT format: Unexpected end of File", e);
+            String pos;
+            try {
+                pos = String.format("position %d", mImageInput.getStreamPosition());
+            }
+            catch (IOException ignore) {
+                pos = "unknown position";
+            }
+
+            throw new IIOException(String.format("Error in PICT format: Unexpected end of File at %s", pos), e);
         }
         catch (IOException e) {
-            throw new IIOException("Error in PICT format: " + e.getMessage(), e);
+            throw new IIOException(String.format("Error in PICT format: %s", e.getMessage()), e);
         }
     }
 
@@ -2528,7 +2536,7 @@ public class PICTImageReader extends ImageReaderBase {
     /*
      * Read a long comment from the stream.
      */
-    private void readLongComment(DataInput pStream) throws IOException {
+    private void readLongComment(final DataInput pStream) throws IOException {
         // Comment kind and data byte count
         pStream.readShort();
 
@@ -2604,12 +2612,12 @@ public class PICTImageReader extends ImageReaderBase {
             // TODO: Might need to clear background
 
             g.setTransform(AffineTransform.getScaleInstance(mScreenImageXRatio, mScreenImageYRatio));
-            try {
+//            try {
                 drawOnto(g);
-            }
+//            }
-            catch (IOException e) {
+//            catch (IOException e) {
-                e.printStackTrace();
+//                e.printStackTrace();
-            }
+//            }
         }
         finally {
             g.dispose();

twelvemonkeys-imageio/pict/src/test/java/com/twelvemonkeys/imageio/plugins/pict/PICTImageReaderTestCase.java

@@ -4,6 +4,7 @@ import com.twelvemonkeys.imageio.util.ImageReaderAbstractTestCase;
 
 import javax.imageio.spi.ImageReaderSpi;
 import java.awt.*;
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 
@@ -18,7 +19,7 @@ public class PICTImageReaderTestCase extends ImageReaderAbstractTestCase<PICTIma
 
     static ImageReaderSpi sProvider = new PICTImageReaderSpi();
 
-    // TODO: Should also test the cliboard format (without 512 byte header)
+    // TODO: Should also test the clipboard format (without 512 byte header)
     protected List<TestData> getTestData() {
         return Arrays.asList(
                 new TestData(getClassLoaderResource("/pict/test.pct"), new Dimension(300, 200)),
@@ -57,4 +58,13 @@ public class PICTImageReaderTestCase extends ImageReaderAbstractTestCase<PICTIma
     protected List<String> getMIMETypes() {
         return Arrays.asList("image/pict", "image/x-pict");
     }
+
+    public void testProviderNotMatchJPEG() throws IOException {
+        // This JPEG contains PICT magic bytes at locations a PICT would normally have them.
+        // We should not claim to be able read it.
+        assertFalse(sProvider.canDecodeInput(new TestData(
+                getClassLoaderResource("/jpeg/R-7439-1151526181.jpeg"),
+                new Dimension(386, 396)
+        )));
+    }
 }