Merge pull request sgothel#76 from esemplare/master

Fix Bug 362: calculated dimensions for MipMaps smaller than 16x16

src/jogl/classes/com/jogamp/opengl/util/texture/spi/DDSImage.java

@@ -766,14 +766,19 @@ private void initFromData(int d3dFormat,
 
         // Now check the mipmaps against this size
         int curSize = topmostMipmapSize;
+        int mipmapWidth = width;
+        int mipmapHeight = height;
         int totalSize = 0;
         for (int i = 0; i < mipmapData.length; i++) {
             if (mipmapData[i].remaining() != curSize) {
                 throw new IllegalArgumentException("Mipmap level " + i +
                                                    " didn't match expected data size (expected " + curSize + ", got " +
                                                    mipmapData[i].remaining() + ")");
             }
-            curSize /= 4;
+            // Compute next mipmap size
+            if (mipmapWidth > 1) mipmapWidth /= 2;
+            if (mipmapHeight > 1) mipmapHeight /= 2;
+            curSize = computeBlockSize(mipmapWidth, mipmapHeight, 1, d3dFormat);
             totalSize += mipmapData[i].remaining();
         }
 
@@ -852,6 +857,32 @@ private static int computeCompressedBlockSize(int width,
         return blockSize;
     }
 
+    private static int computeBlockSize(int width,
+                                        int height,
+                                        int depth,
+                                        int pixelFormat) {
+        int blocksize;
+        switch (pixelFormat) {
+        case D3DFMT_R8G8B8:
+            blocksize = width*height*3;
+            break;
+        case D3DFMT_A8R8G8B8:
+        case D3DFMT_X8R8G8B8:
+            blocksize = width*height*4;
+            break;
+        case D3DFMT_DXT1:
+        case D3DFMT_DXT2:
+        case D3DFMT_DXT3:
+        case D3DFMT_DXT4:
+        case D3DFMT_DXT5:
+            blocksize = computeCompressedBlockSize(width, height, 1, pixelFormat);
+            break;
+        default:
+            throw new IllegalArgumentException("d3dFormat must be one of the known formats");
+        }
+        return blocksize;
+    }
+
     private int mipMapWidth(int map) {
         int width = getWidth();
         for (int i = 0; i < map; i++) {

src/test/com/jogamp/opengl/test/junit/jogl/util/texture/TestBug362DDSImageCreateFromData.java

@@ -0,0 +1,98 @@
+package com.jogamp.opengl.test.junit.jogl.util.texture;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.nio.ByteBuffer;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.jogamp.common.util.IOUtil;
+import com.jogamp.opengl.util.texture.spi.DDSImage;
+import com.jogamp.opengl.util.texture.spi.DDSImage.ImageInfo;
+
+/**
+ * This test uses the DDSImage class to read a dds image from file, extract the data, 
+ * and use the class to create a new DDSImage from the extracted data
+ * <br></br>
+ * Bug Reference: https://jogamp.org/bugzilla/show_bug.cgi?id=362
+ * <br></br>
+ * The bug pertains to incorrect size calculation for checking validity of data. Compressed DXT1 has min of 8 bytes, DXT5 has min of 16 bytes. 
+ * It exists in {@link DDSImage#createFromData(int, int, int, ByteBuffer[])} 
+ * where an {@link IllegalArgumentException} is thrown for Mipmap level size mismatch.
+ * <br></br>
+ * <ul>The following cases are tested:
+ * <li>Uncompressed 64x32 RGB DDS Image with all mipmap levels (64x32 --> 1x1)</li>
+ * <li>DXT1 compressed 64x32 RGB DDS Image with all mipmap levels (64x32 --> 1x1)</li>
+ * <li>DXT5 compressed 64x32 RGB DDS Image with all mipmap levels (64x32 --> 1x1)</li>
+ * </ul>
+ * 
+ * @author Michael Esemplare
+ *
+ */
+public class TestBug362DDSImageCreateFromData {
+
+	File testDDSImage01Uncompressed;
+	File testDDSImage02DXT1;
+	File testDDSImage03DXT5;
+
+	@Before
+    public void setup() throws Throwable {
+		testDDSImage01Uncompressed = initFile("test-64x32_uncompressed.dds");
+		testDDSImage02DXT1 = initFile("test-64x32_DXT1.dds");
+		testDDSImage03DXT5 = initFile("test-64x32_DXT5.dds");
+    }
+
+    @After
+    public void teardown() {
+    	testDDSImage01Uncompressed = null;
+		testDDSImage02DXT1 = null;
+		testDDSImage03DXT5 = null;
+    }
+
+    private File initFile(String filename) throws URISyntaxException {
+    	URLConnection connection = IOUtil.getResource(getClass(), filename);
+    	Assert.assertNotNull(connection);
+    	URL url = connection.getURL();
+    	File file = new File(url.toURI());
+    	Assert.assertTrue(file.exists());
+    	return file;
+    }
+
+    private void testImpl(File file) throws IOException {
+    	DDSImage ddsImage = DDSImage.read(file);
+    	Assert.assertNotNull(ddsImage);
+    	int numMipMaps = ddsImage.getNumMipMaps();
+		ByteBuffer[] mipMapArray = new ByteBuffer[numMipMaps];
+		for (int i=0;i<numMipMaps;i++){
+			ImageInfo info = ddsImage.getMipMap(i);
+			mipMapArray[i] = info.getData();
+		}
+		DDSImage newImage = DDSImage.createFromData(ddsImage.getPixelFormat(), ddsImage.getWidth(), ddsImage.getHeight(), mipMapArray);
+		Assert.assertNotNull(newImage);
+    }
+
+    @Test
+    public void test00_DDSImage_CreateFromData_Uncompressed_RGB () throws IOException {
+    	testImpl(testDDSImage01Uncompressed);
+    }
+
+    @Test
+    public void test01_DDSImage_CreateFromData_DXT1_RGB () throws IOException {
+    	testImpl(testDDSImage02DXT1);
+    }
+
+    @Test
+    public void test02_DDSImage_CreateFromData_DXT5_RGB () throws IOException {
+    	testImpl(testDDSImage03DXT5);
+    }
+
+	public static void main(String[] args) {
+		org.junit.runner.JUnitCore.main(TestBug362DDSImageCreateFromData.class.getName());
+	}
+}