Refactor the PDFRenderer
This commit is contained in:
parent
66ddb27291
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0bdbd7d0ef
1 changed files with 194 additions and 198 deletions
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@ -1,6 +1,7 @@
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package ch.fritteli.labyrinth;
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import lombok.NonNull;
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import lombok.RequiredArgsConstructor;
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import lombok.Value;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDDocumentInformation;
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@ -26,63 +27,104 @@ public class PDFRenderer implements Renderer<byte[]> {
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return new PDFRenderer();
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}
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private static boolean isValid(@NonNull final Position position) {
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return position.getX() >= 0 && position.getY() >= 0;
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}
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@Override
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@NonNull
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public byte[] render(@NonNull final Labyrinth labyrinth) {
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final float pageWidth = labyrinth.getWidth() * SCALE + 2 * MARGIN;
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final float pageHeight = labyrinth.getHeight() * SCALE + 2 * MARGIN;
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final PDDocument pdDocument = new PDDocument();
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final PDDocumentInformation info = new PDDocumentInformation();
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info.setTitle("Labyrinth " + labyrinth.getWidth() + "x" + labyrinth.getHeight() + ", ID " + labyrinth.getRandomSeed());
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pdDocument.setDocumentInformation(info);
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final PDPage page = new PDPage(new PDRectangle(pageWidth, pageHeight));
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final PDPage solution = new PDPage(new PDRectangle(pageWidth, pageHeight));
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pdDocument.addPage(page);
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pdDocument.addPage(solution);
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try (final PDPageContentStream labyrinthPageContentStream = new PDPageContentStream(pdDocument, page);
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final PDPageContentStream solutionPageContentStream = new PDPageContentStream(pdDocument, solution)) {
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setUpPageContentStream(labyrinthPageContentStream);
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setUpPageContentStream(solutionPageContentStream);
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this.drawHorizonzalLines(labyrinth, labyrinthPageContentStream, solutionPageContentStream);
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this.drawVerticalLines(labyrinth, labyrinthPageContentStream, solutionPageContentStream);
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this.drawSolution(labyrinth, solutionPageContentStream);
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} catch (IOException e) {
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e.printStackTrace();
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}
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final ByteArrayOutputStream output = new ByteArrayOutputStream();
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try {
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pdDocument.save(output);
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pdDocument.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return output.toByteArray();
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final Generator generator = new Generator(labyrinth);
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return generator.generate();
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}
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private void setUpPageContentStream(@NonNull final PDPageContentStream pageContentStream) throws IOException {
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pageContentStream.setLineCapStyle(BasicStroke.CAP_ROUND);
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pageContentStream.setLineJoinStyle(BasicStroke.JOIN_ROUND);
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pageContentStream.setLineWidth(1.0f);
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pageContentStream.setStrokingColor(Color.BLACK);
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pageContentStream.setNonStrokingColor(Color.BLACK);
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}
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private void drawHorizonzalLines(@NonNull final Labyrinth labyrinth,
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@NonNull final PDPageContentStream... contentStreams) throws IOException {
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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Coordinate coordinate = new Coordinate(0f, 0f);
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for (int y = 0; y < labyrinth.getHeight(); y++) {
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@RequiredArgsConstructor
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private static class Generator {
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@NonNull
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private final Labyrinth labyrinth;
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private static boolean isValid(@NonNull final Position position) {
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return position.getX() >= 0 && position.getY() >= 0;
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}
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public byte[] generate() {
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final float pageWidth = this.labyrinth.getWidth() * SCALE + 2 * MARGIN;
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final float pageHeight = this.labyrinth.getHeight() * SCALE + 2 * MARGIN;
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final PDDocument pdDocument = new PDDocument();
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final PDDocumentInformation info = new PDDocumentInformation();
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info.setTitle("Labyrinth " + this.labyrinth.getWidth() + "x" + this.labyrinth.getHeight() + ", ID " + this.labyrinth.getRandomSeed());
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pdDocument.setDocumentInformation(info);
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final PDPage page = new PDPage(new PDRectangle(pageWidth, pageHeight));
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final PDPage solution = new PDPage(new PDRectangle(pageWidth, pageHeight));
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pdDocument.addPage(page);
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pdDocument.addPage(solution);
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try (final PDPageContentStream labyrinthPageContentStream = new PDPageContentStream(pdDocument, page);
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final PDPageContentStream solutionPageContentStream = new PDPageContentStream(pdDocument, solution)) {
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setUpPageContentStream(labyrinthPageContentStream);
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setUpPageContentStream(solutionPageContentStream);
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this.drawHorizonzalLines(labyrinthPageContentStream, solutionPageContentStream);
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this.drawVerticalLines(labyrinthPageContentStream, solutionPageContentStream);
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this.drawSolution(solutionPageContentStream);
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} catch (IOException e) {
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e.printStackTrace();
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}
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final ByteArrayOutputStream output = new ByteArrayOutputStream();
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try {
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pdDocument.save(output);
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pdDocument.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return output.toByteArray();
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}
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private void setUpPageContentStream(@NonNull final PDPageContentStream pageContentStream) throws IOException {
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pageContentStream.setLineCapStyle(BasicStroke.CAP_ROUND);
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pageContentStream.setLineJoinStyle(BasicStroke.JOIN_ROUND);
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pageContentStream.setLineWidth(1.0f);
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pageContentStream.setStrokingColor(Color.BLACK);
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pageContentStream.setNonStrokingColor(Color.BLACK);
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}
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private void drawHorizonzalLines(@NonNull final PDPageContentStream... contentStreams) throws IOException {
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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Coordinate coordinate = new Coordinate(0f, 0f);
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for (int y = 0; y < this.labyrinth.getHeight(); y++) {
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boolean isPainting = false;
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coordinate = coordinate.withY(y);
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for (int x = 0; x < this.labyrinth.getWidth(); x++) {
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final Tile currentTile = this.labyrinth.getTileAt(x, y);
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coordinate = coordinate.withX(x);
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if (currentTile.hasWallAt(Direction.TOP)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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}
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isPainting = true;
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}
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} else {
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if (isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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isPainting = false;
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}
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}
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}
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if (isPainting) {
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coordinate = coordinate.withX(this.labyrinth.getWidth());
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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}
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}
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boolean isPainting = false;
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coordinate = coordinate.withY(y, labyrinth);
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for (int x = 0; x < labyrinth.getWidth(); x++) {
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final Tile currentTile = labyrinth.getTileAt(x, y);
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int y = this.labyrinth.getHeight();
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coordinate = coordinate.withY(this.labyrinth.getHeight());
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for (int x = 0; x < this.labyrinth.getWidth(); x++) {
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final Tile currentTile = this.labyrinth.getTileAt(x, y - 1);
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coordinate = coordinate.withX(x);
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if (currentTile.hasWallAt(Direction.TOP)) {
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if (currentTile.hasWallAt(Direction.BOTTOM)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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@ -100,57 +142,55 @@ public class PDFRenderer implements Renderer<byte[]> {
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}
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}
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if (isPainting) {
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coordinate = coordinate.withX(labyrinth.getWidth());
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coordinate = coordinate.withX(this.labyrinth.getWidth());
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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}
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}
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boolean isPainting = false;
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int y = labyrinth.getHeight();
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coordinate = coordinate.withY(labyrinth.getHeight(), labyrinth);
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for (int x = 0; x < labyrinth.getWidth(); x++) {
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final Tile currentTile = labyrinth.getTileAt(x, y - 1);
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coordinate = coordinate.withX(x);
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if (currentTile.hasWallAt(Direction.BOTTOM)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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private void drawVerticalLines(@NonNull final PDPageContentStream... contentStreams) throws IOException {
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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Coordinate coordinate = new Coordinate(0f, 0f);
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for (int x = 0; x < this.labyrinth.getWidth(); x++) {
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boolean isPainting = false;
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coordinate = coordinate.withX(x);
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for (int y = 0; y < this.labyrinth.getHeight(); y++) {
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final Tile currentTile = this.labyrinth.getTileAt(x, y);
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coordinate = coordinate.withY(y);
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if (currentTile.hasWallAt(Direction.LEFT)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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}
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isPainting = true;
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}
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} else {
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if (isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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isPainting = false;
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}
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}
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isPainting = true;
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}
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} else {
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if (isPainting) {
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coordinate = coordinate.withY(this.labyrinth.getHeight());
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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isPainting = false;
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}
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}
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}
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if (isPainting) {
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coordinate = coordinate.withX(labyrinth.getWidth());
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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}
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}
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private void drawVerticalLines(@NonNull final Labyrinth labyrinth,
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@NonNull final PDPageContentStream... contentStreams) throws IOException {
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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Coordinate coordinate = new Coordinate(0f, 0f);
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final float labyrinthHeight = labyrinth.getHeight() * SCALE;
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for (int x = 0; x < labyrinth.getWidth(); x++) {
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boolean isPainting = false;
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coordinate = coordinate.withX(x);
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for (int y = 0; y < labyrinth.getHeight(); y++) {
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final Tile currentTile = labyrinth.getTileAt(x, y);
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coordinate = coordinate.withY(y, labyrinth);
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if (currentTile.hasWallAt(Direction.LEFT)) {
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int x = this.labyrinth.getWidth();
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coordinate = coordinate.withX(this.labyrinth.getWidth());
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for (int y = 0; y < this.labyrinth.getHeight(); y++) {
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final Tile currentTile = this.labyrinth.getTileAt(x - 1, y);
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coordinate = coordinate.withY(y);
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if (currentTile.hasWallAt(Direction.RIGHT)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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@ -168,138 +208,94 @@ public class PDFRenderer implements Renderer<byte[]> {
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}
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}
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if (isPainting) {
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coordinate = coordinate.withY(labyrinth.getHeight(), labyrinth);
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coordinate = coordinate.withY(this.labyrinth.getHeight());
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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}
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}
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}
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boolean isPainting = false;
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int x = labyrinth.getWidth();
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coordinate = coordinate.withX(labyrinth.getWidth());
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for (int y = 0; y < labyrinth.getHeight(); y++) {
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final Tile currentTile = labyrinth.getTileAt(x - 1, y);
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coordinate = coordinate.withY(y, labyrinth);
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if (currentTile.hasWallAt(Direction.RIGHT)) {
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if (!isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.moveTo(coordinate.getX(), coordinate.getY());
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private void drawSolution(@NonNull final PDPageContentStream pageContentStream) throws IOException {
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// Draw the solution in red
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pageContentStream.setStrokingColor(Color.RED);
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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final Position end = this.labyrinth.getEnd();
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Position currentPosition = this.labyrinth.getStart();
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Position previousPosition = null;
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SolutionCoordinate coordinate = new SolutionCoordinate(currentPosition.getX(), currentPosition.getY());
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pageContentStream.moveTo(coordinate.getX(), coordinate.getY());
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do {
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Position newCurrent = this.findNextSolutionPosition(previousPosition, currentPosition);
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previousPosition = currentPosition;
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currentPosition = newCurrent;
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coordinate = new SolutionCoordinate(currentPosition.getX(), currentPosition.getY());
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pageContentStream.lineTo(coordinate.getX(), coordinate.getY());
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} while (!currentPosition.equals(end));
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pageContentStream.stroke();
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}
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@NonNull
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private Position findNextSolutionPosition(@Nullable final Position previousPosition, @NonNull final Position currentPosition) {
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final Tile currentTile = this.labyrinth.getTileAt(currentPosition);
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for (final Direction direction : Direction.values()) {
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if (!currentTile.hasWallAt(direction)) {
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final Position position = direction.translate(currentPosition);
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if (position.equals(previousPosition) || !isValid(position)) {
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continue;
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}
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isPainting = true;
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}
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} else {
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if (isPainting) {
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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if (this.labyrinth.getTileAt(position).isSolution()) {
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return position;
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}
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isPainting = false;
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}
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}
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throw new IllegalStateException("We *SHOULD* never have gotten here. ... famous last words ...");
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}
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if (isPainting) {
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coordinate = coordinate.withY(labyrinth.getHeight(), labyrinth);
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for (final PDPageContentStream contentStream : contentStreams) {
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contentStream.lineTo(coordinate.getX(), coordinate.getY());
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contentStream.stroke();
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@Value
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private class Coordinate {
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float x;
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float y;
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public Coordinate(final float x, final float y) {
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this.x = x;
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this.y = y;
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}
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private float calcX(final int x) {
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return x * SCALE + MARGIN;
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}
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private float calcY(final int y) {
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return (Generator.this.labyrinth.getHeight() - y) * SCALE + MARGIN;
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}
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public Coordinate withX(final int x) {
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return new Coordinate(calcX(x), this.y);
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}
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public Coordinate withY(final int y) {
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return new Coordinate(this.x, calcY(y));
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}
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}
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}
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private void drawSolution(@NonNull final Labyrinth labyrinth,
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@NonNull final PDPageContentStream pageContentStream) throws IOException {
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// Draw the solution in red
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pageContentStream.setStrokingColor(Color.RED);
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// PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
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final Position end = labyrinth.getEnd();
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Position currentPosition = labyrinth.getStart();
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Position previousPosition = null;
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SolutionCoordinate coordinate = new SolutionCoordinate(currentPosition.getX(), currentPosition.getY(), labyrinth);
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pageContentStream.moveTo(coordinate.getX(), coordinate.getY());
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do {
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Position newCurrent = this.findNextSolutionPosition(labyrinth, previousPosition, currentPosition);
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previousPosition = currentPosition;
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currentPosition = newCurrent;
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coordinate = new SolutionCoordinate(currentPosition.getX(), currentPosition.getY(), labyrinth);
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pageContentStream.lineTo(coordinate.getX(), coordinate.getY());
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} while (!currentPosition.equals(end));
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pageContentStream.stroke();
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}
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@Value
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private class SolutionCoordinate {
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float x;
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float y;
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@NonNull
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private Position findNextSolutionPosition(@NonNull final Labyrinth labyrinth, @Nullable final Position previousPosition, @NonNull final Position currentPosition) {
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final Tile currentTile = labyrinth.getTileAt(currentPosition);
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for (final Direction direction : Direction.values()) {
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if (!currentTile.hasWallAt(direction)) {
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final Position position = direction.translate(currentPosition);
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if (position.equals(previousPosition) || !isValid(position)) {
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continue;
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}
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if (labyrinth.getTileAt(position).isSolution()) {
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return position;
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}
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public SolutionCoordinate(final int x, final int y) {
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this.x = calcX(x);
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this.y = calcY(y);
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}
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}
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throw new IllegalStateException("We *SHOULD* never have gotten here. ... famous last words ...");
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}
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@Value
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private static class Coordinate {
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float x;
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float y;
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private float calcX(final int x) {
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return x * SCALE + SCALE / 2 + MARGIN;
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}
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public Coordinate(final float x, final float y) {
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this.x = x;
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this.y = y;
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}
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private static float calcX(final int x) {
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return x * SCALE + MARGIN;
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}
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private static float calcY(final int y, @NonNull final Labyrinth labyrinth) {
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return (labyrinth.getHeight() - y) * SCALE + MARGIN;
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}
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public Coordinate withX(final int x) {
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return new Coordinate(calcX(x), this.y);
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}
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public Coordinate withY(final int y, @NonNull final Labyrinth labyrinth) {
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return new Coordinate(this.x, calcY(y, labyrinth));
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}
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}
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@Value
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private static class SolutionCoordinate {
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float x;
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float y;
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public SolutionCoordinate(final float x, final float y) {
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this.x = x;
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this.y = y;
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}
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public SolutionCoordinate(final int x, final int y, @NonNull final Labyrinth labyrinth) {
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this.x = calcX(x);
|
||||
this.y = calcY(y, labyrinth);
|
||||
}
|
||||
|
||||
private static float calcX(final int x) {
|
||||
return x * SCALE + SCALE / 2 + MARGIN;
|
||||
}
|
||||
|
||||
private static float calcY(final int y, @NonNull final Labyrinth labyrinth) {
|
||||
return (labyrinth.getHeight() - y) * SCALE - SCALE / 2 + MARGIN;
|
||||
}
|
||||
|
||||
public SolutionCoordinate withX(final int x) {
|
||||
return new SolutionCoordinate(calcX(x), this.y);
|
||||
}
|
||||
|
||||
public SolutionCoordinate withY(final int y, @NonNull final Labyrinth labyrinth) {
|
||||
return new SolutionCoordinate(this.x, calcY(y, labyrinth));
|
||||
private float calcY(final int y) {
|
||||
return (Generator.this.labyrinth.getHeight() - y) * SCALE - SCALE / 2 + MARGIN;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue