Simplify passing around of seed value.

src/net/sourceforge/plantuml/AbstractPSystem.java

@@ -143,7 +143,7 @@ public abstract class AbstractPSystem implements Diagram {
 			throws IOException {
 		final long now = System.currentTimeMillis();
 		try {
-			return exportDiagramNow(os, index, fileFormatOption, seed());
+			return exportDiagramNow(os, index, fileFormatOption);
 		} finally {
 			if (OptionFlags.getInstance().isEnableStats()) {
 				StatsUtilsIncrement.onceMoreGenerate(System.currentTimeMillis() - now, getClass(),
@@ -160,8 +160,8 @@ public abstract class AbstractPSystem implements Diagram {
 		return scale;
 	}
 
-	protected abstract ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption,
-			long seed) throws IOException;
+	protected abstract ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption
+			) throws IOException;
 
 	public ClockwiseTopRightBottomLeft getDefaultMargins() {
 		return ClockwiseTopRightBottomLeft.same(0);

src/net/sourceforge/plantuml/NewpagedDiagram.java

@@ -102,7 +102,7 @@ public class NewpagedDiagram extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		return diagrams.get(num).exportDiagram(os, 0, fileFormat);
 	}

src/net/sourceforge/plantuml/PlainDiagram.java

@@ -47,14 +47,15 @@ import static net.sourceforge.plantuml.ugraphic.ImageBuilder.plainImageBuilder;
 public abstract class PlainDiagram extends AbstractPSystem {
 
 	@Override
-	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption, long seed)
+	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
 		final UDrawable drawable = getRootDrawable(fileFormatOption);
 
-		final ImageBuilder builder = plainImageBuilder(drawable, fileFormatOption, seed)
+		final ImageBuilder builder = plainImageBuilder(drawable, fileFormatOption)
 				.margin(getDefaultMargins())
-				.metadata(fileFormatOption.isWithMetadata() ? getMetadata() : null);
+				.metadata(fileFormatOption.isWithMetadata() ? getMetadata() : null)
+				.seed(seed());
 
 		return adjustImageBuilder(builder).write(os);
 	}

src/net/sourceforge/plantuml/SourceStringReader.java

@@ -146,7 +146,7 @@ public class SourceStringReader {
 	public DiagramDescription outputImage(OutputStream os, int numImage, FileFormatOption fileFormatOption)
 			throws IOException {
 		if (blocks.size() == 0) {
-			noStartumlFound(os, fileFormatOption, 42);
+			noStartumlFound(os, fileFormatOption);
 			return null;
 		}
 		for (BlockUml b : blocks) {
@@ -222,11 +222,11 @@ public class SourceStringReader {
 
 	}
 
-	public ImageData noStartumlFound(OutputStream os, FileFormatOption fileFormatOption, long seed) throws IOException {
+	public ImageData noStartumlFound(OutputStream os, FileFormatOption fileFormatOption) throws IOException {
 		final TextBlockBackcolored error = GraphicStrings.createForError(Arrays.asList("No @startuml/@enduml found"),
 				fileFormatOption.isUseRedForError());
 
-		return plainImageBuilder(error, fileFormatOption, seed)
+		return plainImageBuilder(error, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/UmlDiagram.java

@@ -132,7 +132,7 @@ public abstract class UmlDiagram extends TitledDiagram implements Diagram, Annot
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
 		final HColor hover = getSkinParam().hoverPathColor();
@@ -155,20 +155,20 @@ public abstract class UmlDiagram extends TitledDiagram implements Diagram, Annot
 			return imageData;
 		} catch (NoStyleAvailableException e) {
 			// e.printStackTrace();
-			exportDiagramError(os, e, fileFormatOption, seed, null);
+			exportDiagramError(os, e, fileFormatOption, null);
 		} catch (UnparsableGraphvizException e) {
 			e.printStackTrace();
-			exportDiagramError(os, e.getCause(), fileFormatOption, seed, e.getGraphvizVersion());
+			exportDiagramError(os, e.getCause(), fileFormatOption, e.getGraphvizVersion());
 		} catch (Throwable e) {
 			//e.printStackTrace();
-			exportDiagramError(os, e, fileFormatOption, seed, null);
+			exportDiagramError(os, e, fileFormatOption, null);
 		}
 		return ImageDataSimple.error();
 	}
 
-	private void exportDiagramError(OutputStream os, Throwable exception, FileFormatOption fileFormat, long seed,
+	private void exportDiagramError(OutputStream os, Throwable exception, FileFormatOption fileFormat,
 			String graphvizVersion) throws IOException {
-		exportDiagramError(os, exception, fileFormat, seed, getMetadata(), getFlashData(),
+		exportDiagramError(os, exception, fileFormat, seed(), getMetadata(), getFlashData(),
 				getFailureText1(exception, graphvizVersion, getFlashData()));
 	}
 
@@ -208,8 +208,9 @@ public abstract class UmlDiagram extends TitledDiagram implements Diagram, Annot
 				}
 			};
 
-		plainImageBuilder(drawable, fileFormat, seed)
+		plainImageBuilder(drawable, fileFormat)
 				.metadata(metadata)
+				.seed(seed)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/acearth/PSystemXearth.java

@@ -78,7 +78,7 @@ public class PSystemXearth extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		synchronized (PSystemXearth.class) {
 			final ACearth earth = new ACearth(markers);

src/net/sourceforge/plantuml/activitydiagram3/ActivityDiagram3.java

@@ -205,7 +205,7 @@ public class ActivityDiagram3 extends UmlDiagram {
 		result = CompressionXorYBuilder.build(CompressionMode.ON_Y, result, stringBounder);
 
 		result = new TextBlockRecentred(result);
-		return styledImageBuilder(this, result, index, fileFormatOption, seed())
+		return styledImageBuilder(this, result, index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/board/BoardDiagram.java

@@ -78,7 +78,7 @@ public class BoardDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/bpm/BpmDiagram.java

@@ -82,7 +82,7 @@ public class BpmDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getUDrawable(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getUDrawable(), index, fileFormatOption)
 				.annotations(false)
 				.write(os);
 	}

src/net/sourceforge/plantuml/classdiagram/ClassDiagram.java

@@ -198,7 +198,7 @@ public class ClassDiagram extends AbstractClassOrObjectDiagram {
 			final RowLayout rawLayout = getRawLayout(i);
 			fullLayout.addRowLayout(rawLayout);
 		}
-		return styledImageBuilder(this, fullLayout, index, fileFormatOption, seed())
+		return styledImageBuilder(this, fullLayout, index, fileFormatOption)
 				.annotations(false) // Backwards compatibility - this only applies when "layout_new_line" is used
 				.write(os);
 	}

src/net/sourceforge/plantuml/directdot/PSystemDot.java

@@ -68,7 +68,7 @@ public class PSystemDot extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		final Graphviz graphviz = GraphvizUtils.createForSystemDot(null, data,
 				StringUtils.goLowerCase(fileFormat.getFileFormat().name()));

src/net/sourceforge/plantuml/ditaa/PSystemDitaa.java

@@ -88,7 +88,7 @@ public class PSystemDitaa extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		if (fileFormat.getFileFormat() == FileFormat.ATXT) {
 			os.write(getSource().getPlainString().getBytes());

src/net/sourceforge/plantuml/eggs/PSystemPath.java

@@ -53,7 +53,7 @@ public class PSystemPath extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		return path.writeImage(os);
 	}

src/net/sourceforge/plantuml/error/PSystemError.java

@@ -222,7 +222,7 @@ public abstract class PSystemError extends PlainDiagram {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		if (fileFormat.getFileFormat() == FileFormat.ATXT || fileFormat.getFileFormat() == FileFormat.UTXT) {
 			final UGraphicTxt ugt = new UGraphicTxt();
@@ -232,7 +232,7 @@ public abstract class PSystemError extends PlainDiagram {
 			return new ImageDataSimple(1, 1);
 
 		}
-		return super.exportDiagramNow(os, num, fileFormat, seed);
+		return super.exportDiagramNow(os, num, fileFormat);
 	}
 
 	@Override

src/net/sourceforge/plantuml/gitlog/GitDiagram.java

@@ -73,7 +73,7 @@ public class GitDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, 0)
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/help/Help.java

@@ -78,7 +78,7 @@ public class Help extends UmlDiagram {
 		final Sheet sheet = Parser.build(fontConfiguration, HorizontalAlignment.LEFT, getSkinParam(), CreoleMode.FULL)
 				.createSheet(display);
 		final SheetBlock1 sheetBlock = new SheetBlock1(sheet, LineBreakStrategy.NONE, 0);
-		return styledImageBuilder(this, sheetBlock, 1, fileFormat, 0)
+		return styledImageBuilder(this, sheetBlock, 1, fileFormat)
 				.annotations(false)
 				.write(os);
 	}

src/net/sourceforge/plantuml/jcckit/PSystemJcckit.java

@@ -64,7 +64,7 @@ public class PSystemJcckit extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 

src/net/sourceforge/plantuml/jsondiagram/JsonDiagram.java

@@ -86,10 +86,10 @@ public class JsonDiagram extends TitledDiagram {
 	}
 
 	@Override
-	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption, long seed)
+	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, 0)
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/logo/PSystemLogo.java

@@ -61,7 +61,7 @@ public class PSystemLogo extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		final int width = 640;
 		final int height = 480;

src/net/sourceforge/plantuml/math/PSystemLatex.java

@@ -63,7 +63,7 @@ public class PSystemLatex extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		final ScientificEquationSafe asciiMath = ScientificEquationSafe.fromLatex(latex);
 		return asciiMath.export(os, fileFormat, scale, color, backColor);

src/net/sourceforge/plantuml/math/PSystemMath.java

@@ -63,7 +63,7 @@ public class PSystemMath extends AbstractPSystem {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		final ScientificEquationSafe asciiMath = ScientificEquationSafe.fromAsciiMath(math);
 		return asciiMath.export(os, fileFormat, scale, color, backColor);

src/net/sourceforge/plantuml/math/ScientificEquationSafe.java

@@ -101,7 +101,7 @@ public class ScientificEquationSafe {
 			printTrace(e);
 			final ByteArrayOutputStream baos = new ByteArrayOutputStream();
 			try {
-				dimSvg = plainImageBuilder(getRollback(), new FileFormatOption(FileFormat.SVG), 42)
+				dimSvg = plainImageBuilder(getRollback(), new FileFormatOption(FileFormat.SVG))
 						.write(baos);
 			} catch (IOException e1) {
 				return null;

src/net/sourceforge/plantuml/mindmap/MindMapDiagram.java

@@ -84,7 +84,7 @@ public class MindMapDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/nwdiag/NwDiagram.java

@@ -215,7 +215,7 @@ public class NwDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, 0)
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/picoweb/PicoWebServer.java

@@ -189,7 +189,7 @@ public class PicoWebServer implements Runnable {
 			system = PSystemErrorUtils.buildV2(null,
 					new ErrorUml(SYNTAX_ERROR, "No @startuml/@enduml found", 0, new LineLocationImpl("", null)), null,
 					Collections.<StringLocated>emptyList());
-			imageData = ssr.noStartumlFound(os, option.getFileFormatOption(), 42);
+			imageData = ssr.noStartumlFound(os, option.getFileFormatOption());
 		} else {
 			system = ssr.getBlocks().get(0).getDiagram();
 			imageData = system.exportDiagram(os, 0, option.getFileFormatOption());

src/net/sourceforge/plantuml/project/GanttDiagram.java

@@ -163,10 +163,10 @@ public class GanttDiagram extends TitledDiagram implements ToTaskDraw, WithSprit
 	}
 
 	@Override
-	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption, long seed)
+	protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 		final StringBounder stringBounder = fileFormatOption.getDefaultStringBounder(getSkinParam());
-		return styledImageBuilder(this, getTextBlock(stringBounder), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(stringBounder), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/salt/PSystemSalt.java

@@ -112,17 +112,17 @@ public class PSystemSalt extends TitledDiagram implements WithSprite {
 	}
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 		try {
 			final Element salt = createElement(manageSprite());
 			final StringBounder stringBounder = fileFormatOption.getDefaultStringBounder(getSkinParam());
 			final Dimension2D size = salt.getPreferredDimension(stringBounder, 0, 0);
-			return styledImageBuilder(this, getTextBlock(salt, size), index, fileFormatOption, seed())
+			return styledImageBuilder(this, getTextBlock(salt, size), index, fileFormatOption)
 					.write(os);
 		} catch (Exception e) {
 			e.printStackTrace();
-			UmlDiagram.exportDiagramError(os, e, fileFormatOption, seed, getMetadata(), "none",
+			UmlDiagram.exportDiagramError(os, e, fileFormatOption, seed(), getMetadata(), "none",
 					new ArrayList<String>());
 			return ImageDataSimple.error();
 		}

src/net/sourceforge/plantuml/sdot/CucaDiagramFileMakerSmetana.java

@@ -450,7 +450,7 @@ public class CucaDiagramFileMakerSmetana implements CucaDiagramFileMaker {
 
 			// imageBuilder.setUDrawable(new Drawing(new YMirror(dim.getHeight())));
 			final TextBlock drawable = new Drawing(new YMirror(minMax.getMaxY()), minMax);
-			return styledImageBuilder(diagram, drawable, 1, fileFormatOption, diagram.seed())
+			return styledImageBuilder(diagram, drawable, 1, fileFormatOption)
 					.write(os);
 		} catch (Throwable e) {
 			SmetanaDebug.printMe();

src/net/sourceforge/plantuml/sequencediagram/graphic/SequenceDiagramFileMakerPuma2.java

@@ -220,7 +220,7 @@ public class SequenceDiagramFileMakerPuma2 implements FileMaker {
 			}
 
 		};
-		return styledImageBuilder(diagram, drawable, index, fileFormatOption, diagram.seed())
+		return styledImageBuilder(diagram, drawable, index, fileFormatOption)
 				.annotations(false)  // they are managed above
 				.write(os);
 	}

src/net/sourceforge/plantuml/sequencediagram/teoz/SequenceDiagramFileMakerTeoz.java

@@ -139,7 +139,7 @@ public class SequenceDiagramFileMakerTeoz implements FileMaker {
 		if (this.index != index) {
 			throw new IllegalStateException();
 		}
-		return styledImageBuilder(diagram, new Foo(index), index, fileFormatOption, diagram.seed())
+		return styledImageBuilder(diagram, new Foo(index), index, fileFormatOption)
 				.annotations(false)   // they are managed in drawInternal()
 				.write(os);
 	}

src/net/sourceforge/plantuml/sprite/ListSpriteDiagram.java

@@ -74,7 +74,7 @@ public class ListSpriteDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTable(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTable(), index, fileFormatOption)
 				.annotations(false)
 				.write(os);
 	}

src/net/sourceforge/plantuml/sprite/StdlibDiagram.java

@@ -84,7 +84,7 @@ public class StdlibDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTable(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTable(), index, fileFormatOption)
 				.annotations(false)
 				.write(os);
 	}

src/net/sourceforge/plantuml/sudoku/PSystemSudoku.java

@@ -49,7 +49,7 @@ public class PSystemSudoku extends AbstractPSystem {
 	final private ISudoku sudoku;
 
 	@Override
-	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat, long seed)
+	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
 			throws IOException {
 		final GraphicsSudoku sud = new GraphicsSudoku(sudoku);
 		if (fileFormat.getFileFormat() == FileFormat.EPS) {

src/net/sourceforge/plantuml/svek/CucaDiagramFileMakerSvek.java

@@ -120,7 +120,7 @@ public final class CucaDiagramFileMakerSvek implements CucaDiagramFileMaker {
 		// Sorry about this hack. There is a side effect in SvekResult::calculateDimension()
 		result.calculateDimension(stringBounder);  // Ensure text near the margins is not cut off
 
-		return styledImageBuilder(diagram, result, 1, fileFormatOption, diagram.seed())
+		return styledImageBuilder(diagram, result, 1, fileFormatOption)
 				.annotations(false)  // backwards compatibility (AnnotatedWorker is used above)
 				.status(result instanceof GraphvizCrash ? 503 : 0)
 				.warningOrError(warningOrError)

src/net/sourceforge/plantuml/timingdiagram/TimingDiagram.java

@@ -98,7 +98,7 @@ public class TimingDiagram extends UmlDiagram implements Clocks {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/ugraphic/ImageBuilder.java

@@ -111,36 +111,36 @@ public class ImageBuilder {
 	private final TitledDiagram titledDiagram;
 	private UDrawable udrawable;
 	private final FileFormatOption fileFormatOption;
-	private final long seed;
+	private long seed = 42;
 	private int status = 0;
 	private String metadata;
 	private boolean randomPixel;
 	private String warningOrError;
 
-	public static ImageBuilder plainImageBuilder(UDrawable drawable, FileFormatOption fileFormatOption, long seed) {
-		return new ImageBuilder(drawable, null, fileFormatOption, seed, new ImageParameter());
+	public static ImageBuilder plainImageBuilder(UDrawable drawable, FileFormatOption fileFormatOption) {
+		return new ImageBuilder(drawable, null, fileFormatOption, new ImageParameter());
 	}
 
 	public static ImageBuilder plainPngBuilder(UDrawable drawable) {
-		return plainImageBuilder(drawable, new FileFormatOption(FileFormat.PNG), 42);
+		return plainImageBuilder(drawable, new FileFormatOption(FileFormat.PNG));
 	}
 
 	// TODO do something with "index"
 	public static ImageBuilder styledImageBuilder(TitledDiagram diagram, UDrawable drawable, int index,
-												  FileFormatOption fileFormatOption, long seed) {
-		return new ImageBuilder(drawable, diagram, fileFormatOption, seed, new ImageParameter(diagram))
+												  FileFormatOption fileFormatOption) {
+		return new ImageBuilder(drawable, diagram, fileFormatOption, new ImageParameter(diagram))
 				.annotations(true)
 				.backcolor(getBackgroundColor(diagram))
 				.margin(calculateDiagramMargin(diagram))
 				.metadata(fileFormatOption.isWithMetadata() ? diagram.getMetadata() : null)
+				.seed(diagram.seed())
 				.warningOrError(diagram.getWarningOrError());
 	}
 
-	private ImageBuilder(UDrawable drawable, TitledDiagram titledDiagram, FileFormatOption fileFormatOption, long seed, ImageParameter param) {
+	private ImageBuilder(UDrawable drawable, TitledDiagram titledDiagram, FileFormatOption fileFormatOption, ImageParameter param) {
 		this.udrawable = drawable;
 		this.titledDiagram = titledDiagram;
 		this.fileFormatOption = fileFormatOption;
-		this.seed = seed;
 		this.param = param;
 
 		if (drawable instanceof TextBlockBackcolored) {
@@ -180,6 +180,11 @@ public class ImageBuilder {
 		return this;
 	}
 
+	public ImageBuilder seed(long seed) {
+		this.seed = seed;
+		return this;
+	}
+
 	public ImageBuilder status(int status) {
 		this.status = status;
 		return this;
@@ -198,7 +203,7 @@ public class ImageBuilder {
 			final AnnotatedWorker annotatedWorker = new AnnotatedWorker(titledDiagram, skinParam, stringBounder);
 			udrawable = annotatedWorker.addAdd((TextBlock) udrawable);
 		}
-		final ImageData imageData = writeImageTOBEMOVED(fileFormatOption, seed, os);
+		final ImageData imageData = writeImageTOBEMOVED(fileFormatOption, os);
 		((ImageDataAbstract) imageData).setStatus(status);
 		return imageData;
 	}
@@ -210,11 +215,11 @@ public class ImageBuilder {
 		}
 	}
 
-	public ImageData writeImageTOBEMOVED(long seed, OutputStream os) throws IOException {
-		return writeImageTOBEMOVED(fileFormatOption, seed, os);
+	public ImageData writeImageTOBEMOVED(OutputStream os) throws IOException {
+		return writeImageTOBEMOVED(fileFormatOption, os);
 	}
 
-	public ImageData writeImageTOBEMOVED(FileFormatOption fileFormatOption, long seed, OutputStream os)
+	public ImageData writeImageTOBEMOVED(FileFormatOption fileFormatOption, OutputStream os)
 			throws IOException {
 		final FileFormat fileFormat = fileFormatOption.getFileFormat();
 		if (fileFormat == FileFormat.MJPEG) {
@@ -222,10 +227,10 @@ public class ImageBuilder {
 		} else if (fileFormat == FileFormat.ANIMATED_GIF) {
 			return writeImageAnimatedGif(os, fileFormatOption.getDefaultStringBounder(param.getSvgCharSizeHack()));
 		}
-		return writeImageInternal(fileFormatOption, seed, os, param.getAnimation());
+		return writeImageInternal(fileFormatOption, os, param.getAnimation());
 	}
 
-	private ImageData writeImageInternal(FileFormatOption fileFormatOption, long seed, OutputStream os,
+	private ImageData writeImageInternal(FileFormatOption fileFormatOption, OutputStream os,
 			Animation animationArg) throws IOException {
 		Dimension2D dim = getFinalDimension(fileFormatOption.getDefaultStringBounder(param.getSvgCharSizeHack()));
 		double dx = 0;
@@ -238,7 +243,7 @@ public class ImageBuilder {
 			dy = -minmax.getMinY();
 		}
 
-		final UGraphic2 ug = createUGraphic(fileFormatOption, seed, dim, animationArg, dx, dy);
+		final UGraphic2 ug = createUGraphic(fileFormatOption, dim, animationArg, dx, dy);
 		UGraphic ug2 = ug;
 
 		final UStroke borderStroke = param.getBorderStroke();
@@ -361,7 +366,7 @@ public class ImageBuilder {
 
 	private Image getAviImage(AffineTransformation affineTransform) throws IOException {
 		final ByteArrayOutputStream baos = new ByteArrayOutputStream();
-		writeImageInternal(new FileFormatOption(FileFormat.PNG), 42, baos, Animation.singleton(affineTransform));
+		writeImageInternal(new FileFormatOption(FileFormat.PNG), baos, Animation.singleton(affineTransform));
 		baos.close();
 
 		final ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
@@ -370,7 +375,7 @@ public class ImageBuilder {
 		return im;
 	}
 
-	private UGraphic2 createUGraphic(FileFormatOption option, long seed, final Dimension2D dim, Animation animationArg,
+	private UGraphic2 createUGraphic(FileFormatOption option, final Dimension2D dim, Animation animationArg,
 			double dx, double dy) {
 		final ColorMapper colorMapper = param.getColorMapper();
 		final double scaleFactor = (param.getScale() == null ? 1
@@ -382,7 +387,7 @@ public class ImageBuilder {
 					option.getWatermark());
 		case SVG:
 			return createUGraphicSVG(colorMapper, scaleFactor, dim, backcolor, option.getSvgLinkTarget(),
-					option.getHoverColor(), seed, option.getPreserveAspectRatio(), param.getlengthAdjust());
+					option.getHoverColor(), option.getPreserveAspectRatio(), param.getlengthAdjust());
 		case EPS:
 			return new UGraphicEps(colorMapper, EpsStrategy.getDefault2());
 		case EPS_TEXT:
@@ -408,7 +413,7 @@ public class ImageBuilder {
 	}
 
 	private UGraphic2 createUGraphicSVG(ColorMapper colorMapper, double scaleFactor, Dimension2D dim,
-			final HColor suggested, String svgLinkTarget, String hover, long seed, String preserveAspectRatio,
+			final HColor suggested, String svgLinkTarget, String hover, String preserveAspectRatio,
 			LengthAdjust lengthAdjust) {
 		HColor backColor = HColorUtils.WHITE;
 		if (suggested instanceof HColorSimple) {

src/net/sourceforge/plantuml/wbs/WBSDiagram.java

@@ -77,7 +77,7 @@ public class WBSDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}
 

src/net/sourceforge/plantuml/wire/WireDiagram.java

@@ -80,7 +80,7 @@ public class WireDiagram extends UmlDiagram {
 	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
 			throws IOException {
 
-		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption, seed())
+		return styledImageBuilder(this, getTextBlock(), index, fileFormatOption)
 				.write(os);
 	}