fixed loading of 0,0,0 block for 8bit data (#26)

loading of 0,0,0 block for 8bit fixed

Author: ekatrukha

src/main/java/bvv/core/cache/TextureCache.java

@@ -38,6 +38,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import net.imglib2.util.Intervals;
 import bvv.core.backend.Texture3D;
+import bvv.core.backend.Texture.InternalFormat;
 import bvv.core.blocks.ByteUtils;
 
 import static bvv.core.cache.TextureCache.ContentState.INCOMPLETE;
@@ -301,10 +302,20 @@ private void initializeBlockedTiles( ArrayList< TileFillTask > tileFillTasks )
 		final Object dummyImage = new Object();
 		final ImageBlockKey< Object > oobDummyKey = new ImageBlockKey<>( dummyImage, new int[] { 0, 0, 0 } );
 		final int elementsPerTile = ( int ) Intervals.numElements( spec.paddedBlockSize() );
-		tileFillTasks.add( new TileFillTask( new DefaultFillTask( oobDummyKey, buf -> {
-			ByteUtils.setShorts( ( short ) 0, buf.getAddress(), elementsPerTile );
-			return true;
-		} , () -> true ), oobTile ) );
+		if(spec.format() == InternalFormat.R8)
+		{
+			tileFillTasks.add( new TileFillTask( new DefaultFillTask( oobDummyKey, buf -> {
+				ByteUtils.setBytes( ( byte ) 0, buf.getAddress(), elementsPerTile );
+				return true;
+			} , () -> true ), oobTile ) );
+		}
+		if(spec.format() == InternalFormat.R16)
+		{
+			tileFillTasks.add( new TileFillTask( new DefaultFillTask( oobDummyKey, buf -> {
+				ByteUtils.setShorts( ( short ) 0, buf.getAddress(), elementsPerTile );
+				return true;
+			} , () -> true ), oobTile ) );
+		}
 	}
 
 	private List< Tile > assignFillTiles( final int size, final int currentTimestamp )