Java Matrix类代码示例

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
/**
 * <a href="http://stackoverflow.com/questions/40611736/rotate-pdf-around-its-center-using-pdfbox-in-java">
 * Rotate PDF around its center using PDFBox in java
 * </a>
 * <p>
 * This test shows how to rotate the page content and then move its crop box and
 * media box accordingly to make it appear as if the content was rotated around
 * the center of the crop box.
 * </p>
 */
@Test
public void testRotateMoveBox() throws IOException
{
    try (   InputStream resource = getClass().getResourceAsStream("IRJET_Copy_Right_form.pdf")  )
    {
        PDDocument document = PDDocument.load(resource);
        PDPage page = document.getDocumentCatalog().getPages().get(0);
        PDPageContentStream cs = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.PREPEND, false, false);
        Matrix matrix = Matrix.getRotateInstance(Math.toRadians(45), 0, 0);
        cs.transform(matrix);
        cs.close();

        PDRectangle cropBox = page.getCropBox();
        float cx = (cropBox.getLowerLeftX() + cropBox.getUpperRightX()) / 2;
        float cy = (cropBox.getLowerLeftY() + cropBox.getUpperRightY()) / 2;
        Point2D.Float newC = matrix.transformPoint(cx, cy);
        float tx = (float)newC.getX() - cx;
        float ty = (float)newC.getY() - cy;
        page.setCropBox(new PDRectangle(cropBox.getLowerLeftX() + tx, cropBox.getLowerLeftY() + ty, cropBox.getWidth(), cropBox.getHeight()));
        PDRectangle mediaBox = page.getMediaBox();
        page.setMediaBox(new PDRectangle(mediaBox.getLowerLeftX() + tx, mediaBox.getLowerLeftY() + ty, mediaBox.getWidth(), mediaBox.getHeight()));

        document.save(new File(RESULT_FOLDER, "IRJET_Copy_Right_form-rotated-move-box.pdf"));
    }
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@Test
public void testMultiPageJFreeChart() throws IOException {
	File parentDir = new File("target/test/multipage");
	// noinspection ResultOfMethodCallIgnored
	parentDir.mkdirs();
	File targetPDF = new File(parentDir, "multipage.pdf");
	PDDocument document = new PDDocument();
	for (int i = 0; i < 4; i++) {
		PDPage page = new PDPage(PDRectangle.A4);
		document.addPage(page);

		PDPageContentStream contentStream = new PDPageContentStream(document, page);
		PdfBoxGraphics2D pdfBoxGraphics2D = new PdfBoxGraphics2D(document, 800, 400);
		drawOnGraphics(pdfBoxGraphics2D, i);
		pdfBoxGraphics2D.dispose();

		PDFormXObject appearanceStream = pdfBoxGraphics2D.getXFormObject();
		Matrix matrix = new Matrix();
		matrix.translate(0, 30);
		matrix.scale(0.7f, 1f);

		contentStream.saveGraphicsState();
		contentStream.transform(matrix);
		contentStream.drawForm(appearanceStream);
		contentStream.restoreGraphicsState();

		contentStream.close();
	}
	document.save(targetPDF);
	document.close();
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
/**
 * <a href="http://stackoverflow.com/questions/40611736/rotate-pdf-around-its-center-using-pdfbox-in-java">
 * Rotate PDF around its center using PDFBox in java
 * </a>
 * <p>
 * This test shows how to rotate the page content around the center of its crop box.
 * </p>
 */
@Test
public void testRotateCenter() throws IOException
{
    try (   InputStream resource = getClass().getResourceAsStream("IRJET_Copy_Right_form.pdf")  )
    {
        PDDocument document = PDDocument.load(resource);
        PDPage page = document.getDocumentCatalog().getPages().get(0);
        PDPageContentStream cs = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.PREPEND, false, false); 
        PDRectangle cropBox = page.getCropBox();
        float tx = (cropBox.getLowerLeftX() + cropBox.getUpperRightX()) / 2;
        float ty = (cropBox.getLowerLeftY() + cropBox.getUpperRightY()) / 2;
        cs.transform(Matrix.getTranslateInstance(tx, ty));
        cs.transform(Matrix.getRotateInstance(Math.toRadians(45), 0, 0));
        cs.transform(Matrix.getTranslateInstance(-tx, -ty));
        cs.close();
        document.save(new File(RESULT_FOLDER, "IRJET_Copy_Right_form-rotated-center.pdf"));
    }
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
/**
 * <a href="http://stackoverflow.com/questions/40611736/rotate-pdf-around-its-center-using-pdfbox-in-java">
 * Rotate PDF around its center using PDFBox in java
 * </a>
 * <p>
 * This test shows how to rotate the page content around the center of its crop box
 * and then crop it to make all previously visible content fit.
 * </p>
 */
@Test
public void testRotateCenterScale() throws IOException
{
    try (   InputStream resource = getClass().getResourceAsStream("IRJET_Copy_Right_form.pdf")  )
    {
        PDDocument document = PDDocument.load(resource);
        PDPage page = document.getDocumentCatalog().getPages().get(0);
        PDPageContentStream cs = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.PREPEND, false, false);

        Matrix matrix = Matrix.getRotateInstance(Math.toRadians(45), 0, 0);
        PDRectangle cropBox = page.getCropBox();
        float tx = (cropBox.getLowerLeftX() + cropBox.getUpperRightX()) / 2;
        float ty = (cropBox.getLowerLeftY() + cropBox.getUpperRightY()) / 2;

        Rectangle rectangle = cropBox.transform(matrix).getBounds();
        float scale = Math.min(cropBox.getWidth() / (float)rectangle.getWidth(), cropBox.getHeight() / (float)rectangle.getHeight());

        cs.transform(Matrix.getTranslateInstance(tx, ty));
        cs.transform(matrix);
        cs.transform(Matrix.getScaleInstance(scale, scale));
        cs.transform(Matrix.getTranslateInstance(-tx, -ty));
        cs.close();
        document.save(new File(RESULT_FOLDER, "IRJET_Copy_Right_form-rotated-center-scale.pdf"));
    }
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
void deleteCharsInPath() {
    for (List<TextPosition> list : charactersByArticle) {
        List<TextPosition> toRemove = new ArrayList<>();
        for (TextPosition text : list) {
            Matrix textMatrix = text.getTextMatrix();
            Vector start = textMatrix.transform(new Vector(0, 0));
            Vector end = new Vector(start.getX() + text.getWidth(), start.getY());
            if (linePath.contains(lowerLeftX + start.getX(), lowerLeftY + start.getY()) ||
                    (checkEndPointToo && linePath.contains(lowerLeftX + end.getX(), lowerLeftY + end.getY()))) {
                toRemove.add(text);
            }
        }
        if (toRemove.size() != 0) {
            System.out.println(toRemove.size());
            list.removeAll(toRemove);
        }
    }
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@Override
public void process(Operator operator, List<COSBase> arguments)
  throws IOException {
  if (arguments.size() < 6) {
    throw new MissingOperandException(operator, arguments);
  }

  // concatenate matrix to current transformation matrix
  COSNumber a = (COSNumber) arguments.get(0);
  COSNumber b = (COSNumber) arguments.get(1);
  COSNumber c = (COSNumber) arguments.get(2);
  COSNumber d = (COSNumber) arguments.get(3);
  COSNumber e = (COSNumber) arguments.get(4);
  COSNumber f = (COSNumber) arguments.get(5);

  Matrix matrix = new Matrix(a.floatValue(), b.floatValue(), c.floatValue(),
          d.floatValue(), e.floatValue(), f.floatValue());

  context.getCurrentTransformationMatrix().concatenate(matrix);
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@Override
public void process(Operator operator, List<COSBase> arguments)
  throws MissingOperandException {
  if (arguments.size() < 6) {
    throw new MissingOperandException(operator, arguments);
  }
  
  COSNumber a = (COSNumber) arguments.get(0);
  COSNumber b = (COSNumber) arguments.get(1);
  COSNumber c = (COSNumber) arguments.get(2);
  COSNumber d = (COSNumber) arguments.get(3);
  COSNumber e = (COSNumber) arguments.get(4);
  COSNumber f = (COSNumber) arguments.get(5);

  // Set both matrices to 
  // [ a b 0
  //   c d 0
  //   e f 1 ]
  
  Matrix matrix = new Matrix(a.floatValue(), b.floatValue(), 
      c.floatValue(), d.floatValue(), e.floatValue(), f.floatValue());

  context.setTextMatrix(matrix);
  context.setTextLineMatrix(matrix.clone());
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@Override
public void process(Operator operator, List<COSBase> arguments)
  throws MissingOperandException {
  if (arguments.size() < 2) {
    throw new MissingOperandException(operator, arguments);
  }
  Matrix tlm = context.getTextLineMatrix();
  if (tlm == null) {
    return;
  }

  COSNumber tx = (COSNumber) arguments.get(0);
  COSNumber ty = (COSNumber) arguments.get(1);
  
  Matrix matrix = new Matrix(1, 0, 0, 1, tx.floatValue(), ty.floatValue());
  tlm.concatenate(matrix);
      
  context.setTextMatrix(tlm.clone());
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
/**
 * Computes the bounding box from given Rectangle2D in device space units.
 * 
 * @param rect
 *          the chars string.
 * @param font
 *          the current font.
 * @param trm
 *          the current text rendering matrix.
 * @return the bounding box from given char string.
 */
protected Rectangle computeBoundingBox(BoundingBox rect, PDFont font,
    Matrix trm) {
  if (rect != null && font != null) {
    Matrix fontMatrix = font.getFontMatrix();
    
    Point ll = new SimplePoint(rect.getLowerLeftX(), rect.getLowerLeftY());
    Point ur = new SimplePoint(rect.getUpperRightX(), rect.getUpperRightY());

    // glyph space -> text space
    transform(ll, fontMatrix);
    transform(ur, fontMatrix);

    // text space -> device space
    transform(ll, trm);
    transform(ur, trm);
    
    return new SimpleRectangle(ll, ur);
  }
  return null;
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
boolean strikesThrough(TextPosition textPosition)
{
    Matrix matrix = textPosition.getTextPos();
    // TODO: This is a very simplistic implementation only working for horizontal text without page rotation
    // and horizontal rectangular strikeThroughs with p0 at the left bottom and p2 at the right top

    // Check if rectangle horizontally matches (at least) the text
    if (p0.getX() > matrix.getXPosition() + textPosition.getWidth() * .1f || p2.getX() < matrix.getXPosition() + textPosition.getWidth() * .9f)
        return false;
    // Check whether rectangle vertically is at the right height to underline
    double vertDiff = p0.getY() - matrix.getYPosition();
    if (vertDiff < 0 || vertDiff > textPosition.getFont().getFontDescriptor().getAscent() * textPosition.getFontSizeInPt() / 1000.0)
        return false;
    // Check whether rectangle is small enough to be a line
    return Math.abs(p2.getY() - p0.getY()) < 2;
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
boolean underlines(TextPosition textPosition)
{
    Matrix matrix = textPosition.getTextPos();
    // TODO: This is a very simplistic implementation only working for horizontal text without page rotation
    // and horizontal rectangular underlines with p0 at the left bottom and p2 at the right top

    // Check if rectangle horizontally matches (at least) the text
    if (p0.getX() > matrix.getXPosition() + textPosition.getWidth() * .1f || p2.getX() < matrix.getXPosition() + textPosition.getWidth() * .9f)
        return false;
    // Check whether rectangle vertically is at the right height to underline
    double vertDiff = p0.getY() - matrix.getYPosition();
    if (vertDiff > 0 || vertDiff < textPosition.getFont().getFontDescriptor().getDescent() * textPosition.getFontSizeInPt() / 500.0)
        return false;
    // Check whether rectangle is small enough to be a line
    return Math.abs(p2.getY() - p0.getY()) < 2;
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
/**
 * Draw an image at the x,y coordinates, with the given size.
 *
 * @param image
 *        The image to draw.
 * @param x
 *        The x-coordinate to draw the image.
 * @param y
 *        The y-coordinate to draw the image.
 * @param width
 *        The width to draw the image.
 * @param height
 *        The height to draw the image.
 * @throws IOException
 *         If there is an error writing to the stream.
 * @throws IllegalStateException
 *         If the method was called within a text block.
 */
public void drawImage (final PDImageXObject image,
                       final float x,
                       final float y,
                       final float width,
                       final float height) throws IOException
{
  if (inTextMode)
  {
    throw new IllegalStateException ("Error: drawImage is not allowed within a text block.");
  }

  saveGraphicsState ();

  final AffineTransform transform = new AffineTransform (width, 0, 0, height, x, y);
  transform (new Matrix (transform));

  writeOperand (resources.add (image));
  writeOperator ((byte) 'D', (byte) 'o');

  restoreGraphicsState ();
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs) {
	AffineTransform tf = new AffineTransform();
	tf.concatenate(baseTransform);
	tf.concatenate(transform);
	tf.concatenate((AffineTransform) xform.clone());

	PDImageXObject pdImage = imageEncoder.encodeImage(document, contentStream, img);
	try {
		contentStreamSaveState();
		int imgHeight = img.getHeight(obs);
		tf.translate(0, imgHeight);
		tf.scale(1, -1);
		contentStream.transform(new Matrix(tf));

		Object keyInterpolation = renderingHints.get(RenderingHints.KEY_INTERPOLATION);
		if (RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR.equals(keyInterpolation))
			pdImage.setInterpolate(false);
		contentStream.drawImage(pdImage, 0, 0, img.getWidth(obs), imgHeight);
		contentStreamRestoreState();
	} catch (IOException e) {
		throwException(e);
	}
	return true;
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@Override
public void drawText(AttributedCharacterIterator iterator, IFontTextDrawerEnv env)
		throws IOException, FontFormatException {
	PDPageContentStream contentStream = env.getContentStream();

	contentStream.beginText();

	Matrix textMatrix = new Matrix();
	textMatrix.scale(1, -1);
	contentStream.setTextMatrix(textMatrix);

	StringBuilder sb = new StringBuilder();
	boolean run = true;
	while (run) {

		Font attributeFont = (Font) iterator.getAttribute(TextAttribute.FONT);
		if (attributeFont == null)
			attributeFont = env.getFont();

		Number fontSize = ((Number) iterator.getAttribute(TextAttribute.SIZE));
		if (fontSize != null)
			attributeFont = attributeFont.deriveFont(fontSize.floatValue());
		PDFont font = applyFont(attributeFont, env);

		Paint paint = (Paint) iterator.getAttribute(TextAttribute.FOREGROUND);
		if (paint == null)
			paint = env.getPaint();

		/*
		 * Apply the paint
		 */
		env.applyPaint(paint);

		boolean isStrikeThrough = TextAttribute.STRIKETHROUGH_ON
				.equals(iterator.getAttribute(TextAttribute.STRIKETHROUGH));
		boolean isUnderline = TextAttribute.UNDERLINE_ON.equals(iterator.getAttribute(TextAttribute.UNDERLINE));
		boolean isLigatures = TextAttribute.LIGATURES_ON.equals(iterator.getAttribute(TextAttribute.LIGATURES));

		run = iterateRun(iterator, sb);
		String text = sb.toString();

		/*
		 * If we force the text write we may encounter situations where the font can not
		 * display the characters. PDFBox will throw an exception in this case. We will
		 * just silently ignore the text and not display it instead.
		 */
		try {
			showTextOnStream(env, contentStream, attributeFont, font, isStrikeThrough, isUnderline, isLigatures,
					text);
		} catch (IllegalArgumentException e) {
			if (font instanceof PDType1Font && !font.isEmbedded()) {
				/*
				 * We tried to use a builtin default font, but it does not have the needed
				 * characters. So we use a embedded font as fallback.
				 */
				try {
					if (fallbackFontUnknownEncodings == null)
						fallbackFontUnknownEncodings = findFallbackFont(env);
					if (fallbackFontUnknownEncodings != null) {
						env.getContentStream().setFont(fallbackFontUnknownEncodings, attributeFont.getSize2D());
						showTextOnStream(env, contentStream, attributeFont, fallbackFontUnknownEncodings,
								isStrikeThrough, isUnderline, isLigatures, text);
						e = null;
					}
				} catch (IllegalArgumentException ignored) {
					e = ignored;
				}
			}

			if (e != null)
				System.err.println("PDFBoxGraphics: Can not map text " + text + " with font "
						+ attributeFont.getFontName() + ": " + e.getMessage());
		}
	}
	contentStream.endText();
}
 

import org.apache.pdfbox.util.Matrix; //导入依赖的package包/类
@SuppressWarnings("SpellCheckingInspection")
void exportGraphic(String dir, String name, GraphicsExporter exporter) {
	try {
		PDDocument document = new PDDocument();

		PDFont pdArial = PDFontFactory.createDefaultFont();

		File parentDir = new File("target/test/" + dir);
		// noinspection ResultOfMethodCallIgnored
		parentDir.mkdirs();

		BufferedImage image = new BufferedImage(400, 400, BufferedImage.TYPE_4BYTE_ABGR);
		Graphics2D imageGraphics = image.createGraphics();
		exporter.draw(imageGraphics);
		imageGraphics.dispose();
		ImageIO.write(image, "PNG", new File(parentDir, name + ".png"));

		for (Mode m : Mode.values()) {
			PDPage page = new PDPage(PDRectangle.A4);
			document.addPage(page);

			PDPageContentStream contentStream = new PDPageContentStream(document, page);
			PdfBoxGraphics2D pdfBoxGraphics2D = new PdfBoxGraphics2D(document, 400, 400);
			PdfBoxGraphics2DFontTextDrawer fontTextDrawer = null;
			contentStream.beginText();
			contentStream.setStrokingColor(0, 0, 0);
			contentStream.setNonStrokingColor(0, 0, 0);
			contentStream.setFont(PDType1Font.HELVETICA_BOLD, 15);
			contentStream.setTextMatrix(Matrix.getTranslateInstance(10, 800));
			contentStream.showText("Mode " + m);
			contentStream.endText();
			switch (m) {
			case FontTextIfPossible:
				fontTextDrawer = new PdfBoxGraphics2DFontTextDrawer();
				fontTextDrawer.registerFont(
						new File("src/test/resources/de/rototor/pdfbox/graphics2d/DejaVuSerifCondensed.ttf"));
				break;
			case DefaultFontText: {
				fontTextDrawer = new PdfBoxGraphics2DFontTextDrawerDefaultFonts();
				fontTextDrawer.registerFont(
						new File("src/test/resources/de/rototor/pdfbox/graphics2d/DejaVuSerifCondensed.ttf"));
				break;
			}
			case ForceFontText:
				fontTextDrawer = new PdfBoxGraphics2DFontTextForcedDrawer();
				fontTextDrawer.registerFont(
						PdfBoxGraphics2DTestBase.class.getResourceAsStream("DejaVuSerifCondensed.ttf"));
				fontTextDrawer.registerFont("Arial", pdArial);
				break;
			case DefaultVectorized:
			default:
				break;
			}

			if (fontTextDrawer != null) {
				pdfBoxGraphics2D.setFontTextDrawer(fontTextDrawer);
			}

			exporter.draw(pdfBoxGraphics2D);
			pdfBoxGraphics2D.dispose();

			PDFormXObject appearanceStream = pdfBoxGraphics2D.getXFormObject();
			Matrix matrix = new Matrix();
			matrix.translate(0, 20);
			contentStream.transform(matrix);
			contentStream.drawForm(appearanceStream);

			matrix.scale(1.5f, 1.5f);
			matrix.translate(0, 100);
			contentStream.transform(matrix);
			contentStream.drawForm(appearanceStream);
			contentStream.close();
		}

		document.save(new File(parentDir, name + ".pdf"));
		document.close();
	} catch (Exception e) {
		throw new RuntimeException(e);
	}
}