#292 Now builds on Java 8, 11 and 15.

imageio/imageio-bmp/src/main/java/com/twelvemonkeys/imageio/plugins/bmp/BMPImageReader.java

@@ -37,7 +37,7 @@ import java.io.DataInput;
 import java.io.File;
 import java.io.IOException;
 import java.nio.ByteOrder;
-import java.util.Arrays;
+import java.util.Collections;
 import java.util.Iterator;
 
 import javax.imageio.IIOException;
@@ -205,7 +205,7 @@ public final class BMPImageReader extends ImageReaderBase {
         checkBounds(pImageIndex);
 
         // TODO: Better implementation, include INT_RGB types for 3BYTE_BGR and 4BYTE_ABGR for INT_ARGB
-        return Arrays.asList(getRawImageType(pImageIndex)).iterator();
+        return Collections.singletonList(getRawImageType(pImageIndex)).iterator();
     }
 
     @Override
@@ -410,6 +410,13 @@ public final class BMPImageReader extends ImageReaderBase {
 
     private ImageReader initReaderDelegate(int compression) throws IOException {
         ImageReader reader = getImageReaderDelegate(compression);
+        reader.reset();
+
+        // Install listener
+        ListenerDelegator listenerDelegator = new ListenerDelegator();
+        reader.addIIOReadWarningListener(listenerDelegator);
+        reader.addIIOReadProgressListener(listenerDelegator);
+        reader.addIIOReadUpdateListener(listenerDelegator);
 
         imageInput.seek(pixelOffset);
         reader.setInput(new SubImageInputStream(imageInput, header.getImageSize()));
@@ -450,12 +457,6 @@ public final class BMPImageReader extends ImageReaderBase {
 
         ImageReader reader = readers.next();
 
-        // Install listener
-        ListenerDelegator listenerDelegator = new ListenerDelegator();
-        reader.addIIOReadWarningListener(listenerDelegator);
-        reader.addIIOReadProgressListener(listenerDelegator);
-        reader.addIIOReadUpdateListener(listenerDelegator);
-
         // Cache for later use
         switch (compression) {
             case DIB.COMPRESSION_JPEG:
@@ -633,7 +634,8 @@ public final class BMPImageReader extends ImageReaderBase {
         return new BMPMetadata(header, colors);
     }
 
-    public static void main(String[] args) throws IOException {
+    @SuppressWarnings("ConstantConditions")
+    public static void main(String[] args) {
         BMPImageReaderSpi provider = new BMPImageReaderSpi();
         BMPImageReader reader = new BMPImageReader(provider);
 
@@ -686,7 +688,7 @@ public final class BMPImageReader extends ImageReaderBase {
         }
     }
 
-    @SuppressWarnings({"unchecked", "UnusedDeclaration"})
+    @SuppressWarnings({ "unchecked", "UnusedDeclaration", "SameParameterValue" })
     static <T extends Throwable> void throwAs(final Class<T> pType, final Throwable pThrowable) throws T {
         throw (T) pThrowable;
     }

imageio/imageio-bmp/src/main/java/com/twelvemonkeys/imageio/plugins/bmp/DIBHeader.java

@@ -364,7 +364,11 @@ abstract class DIBHeader {
 
         public String getBMPVersion() {
             // This is to be compatible with the native metadata of the original com.sun....BMPMetadata
-            return compression == DIB.COMPRESSION_BITFIELDS ? "BMP v. 3.x NT" : "BMP v. 3.x";
+            return size > DIB.BITMAP_INFO_HEADER_SIZE
+                   ? "BMP V2/V3 INFO"
+                   : compression == DIB.COMPRESSION_BITFIELDS || compression == DIB.COMPRESSION_ALPHA_BITFIELDS
+                     ? "BMP v. 3.x NT"
+                     : "BMP v. 3.x";
         }
     }
 

imageio/imageio-bmp/src/test/java/com/twelvemonkeys/imageio/plugins/bmp/BMPImageReaderTest.java

@@ -342,6 +342,7 @@ public class BMPImageReaderTest extends ImageReaderAbstractTest<BMPImageReader>
 
         for (TestData data : getTestData()) {
             if (data.getInput().toString().contains("pal8offs")) {
+                // Skip: Contains extra bogus PaletteEntry nodes
                 continue;
             }
 
@@ -358,6 +359,7 @@ public class BMPImageReaderTest extends ImageReaderAbstractTest<BMPImageReader>
                 System.err.println("WARNING: Reading " + data + " caused exception: " + e.getMessage());
                 continue;
             }
+
             IIOMetadata jreMetadata = jreReader.getImageMetadata(0);
 
             assertTrue(metadata.isStandardMetadataFormatSupported());
@@ -370,6 +372,7 @@ public class BMPImageReaderTest extends ImageReaderAbstractTest<BMPImageReader>
                 String absolutePath = data.toString();
                 String localPath = absolutePath.substring(absolutePath.lastIndexOf("test-classes") + 12);
 
+                // TODO: blauesglas_16_bitmask444 fails BMP Version for 11+
                 Node expectedTree = jreMetadata.getAsTree(format);
                 Node actualTree = metadata.getAsTree(format);
 
@@ -428,6 +431,7 @@ public class BMPImageReaderTest extends ImageReaderAbstractTest<BMPImageReader>
         }
     }
 
+    @SuppressWarnings("RedundantIfStatement")
     private boolean excludeEqualValueTest(final Node expected) {
         if (expected.getLocalName().equals("ImageSize")) {
             // JRE metadata returns 0, even if known in reader...