Java Image.scalePercent方法代码示例

import com.lowagie.text.Image; //导入方法依赖的package包/类
private Image generateBarCode()
{
	try {
	Barcode128 code128 = new Barcode128();
	
	code128.setSize(12f);
	code128.setBaseline(12f);
	code128.setCode(barcode);

	Image img = code128.createImageWithBarcode(writer.getDirectContent(), null, null);
	img.scalePercent(50, 50);

			
	//img.setAbsolutePosition(PageSize.A4.width() - img.width() - 10,10);			
  		//document.add(img);
	
	return img;
	}catch (Exception ex){
		ex.printStackTrace();
		return null;
	}
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 *  M�todo que permite introducir un c�digo de barras code128 que represente el texto
 * que se pasa como par�metro. Se debe indicar la p�gina del PDF donde se debe introducir
 * el c�digo (normlamente la p�gina 1) y la posici�n absoluta X e Y dentro de la p�gina.
 */
public void establecerBarCode (int Pagina, String texto, int XPos, int YPos) throws Exception
{		
		Barcode128 code128 = new Barcode128();
	
		code128.setSize(12f);
		code128.setBaseline(12f);
		code128.setCode(texto);

		Image img = code128.createImageWithBarcode(pdfs.getOverContent(Pagina), null, null);
	
		img.setAbsolutePosition(XPos, YPos);
		//Se hace un poco mas peque�o en la escala X para que no ocupe tanto
		img.scalePercent(75, 100);
	
		pdfs.getOverContent(Pagina).addImage(img);

}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/** Print an iText image */
private void printImage(Image image, PdfContentByte cb, float x1, float y1, float x2, float y2, int alignment, int fitMethod, float rotate)
throws DocumentException {
    if(image!=null) {
        float boxWidth = Math.abs(x2-x1)+1;
        float boxHeight = Math.abs(y2-y1)+1;
        log.debug("Print Image (Size w="+image.getPlainWidth()+",h="+image.getPlainHeight()+") wthin BOX (w="+boxWidth+",h="+boxHeight+") FitMethod = "+fitMethod);

        // Clip the image based on the bounding box
        if(fitMethod==FIT_METHOD_CLIP) {
            if( (boxWidth < image.getPlainWidth()) || (boxHeight < image.getPlainHeight()) ) {
                // @TODO - Clip image
                log.warn("IMAGE CLIPPING REQUIRED, but not implemented - default to 'SCALE'...");
                fitMethod=FIT_METHOD_SCALE;
            }
        }
        // Stretch/shrink both the X/Y to fit the bounding box
        if(fitMethod==FIT_METHOD_FILL) {
            log.debug("Scale image to fill box");
            image.scaleToFit(x2-x1, y2-y1);
        }
        // Stretch/shrink preserving the aspect ratio to fit the bounding box
        if(fitMethod==FIT_METHOD_SCALE) {
            float multipler = Math.min(boxWidth / image.getPlainWidth(), boxHeight /image.getPlainHeight());
            log.debug("Need to scale image by " + (Math.floor(multipler*10000)/100) + "%");
            image.scalePercent(multipler*100);
        }
        log.debug("Print image at (" + x1 + "," + y1 +")");
        image.setAbsolutePosition(x1,y1);
        image.setRotationDegrees(rotate);
        cb.addImage(image);
        //Phrase text = new Phrase(new Chunk(image, 0, 0));
        //ColumnText ct = new ColumnText(cb);
        //ct.setSimpleColumn(text, x1, y1, x2, y2, 10, alignment);
        //ct.go();
    }
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Scaling an image.
 */
@Test
public void main() throws Exception {

	// step 1: creation of a document-object
	Document document = new Document();

	// step 2:
	// we create a writer that listens to the document
	// and directs a PDF-stream to a file

	PdfWriter.getInstance(document, PdfTestBase.getOutputStream("scaling.pdf"));

	// step 3: we open the document
	document.open();

	// step 4: we add content
	Image jpg1 = Image.getInstance(PdfTestBase.RESOURCES_DIR + "otsoe.jpg");
	jpg1.scaleAbsolute(160, 120);
	document.add(new Paragraph("scaleAbsolute(160, 120)"));
	document.add(jpg1);
	Image jpg2 = Image.getInstance(PdfTestBase.RESOURCES_DIR + "otsoe.jpg");
	jpg2.scalePercent(50);
	document.add(new Paragraph("scalePercent(50)"));
	document.add(jpg2);
	Image jpg3 = Image.getInstance(PdfTestBase.RESOURCES_DIR + "otsoe.jpg");
	jpg3.scaleAbsolute(320, 120);
	document.add(new Paragraph("scaleAbsolute(320, 120)"));
	document.add(jpg3);
	Image jpg4 = Image.getInstance(PdfTestBase.RESOURCES_DIR + "otsoe.jpg");
	jpg4.scalePercent(100, 50);
	document.add(new Paragraph("scalePercent(100, 50)"));
	document.add(jpg4);

	// step 5: we close the document
	document.close();
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Example Barcode PDF417.
 */
@Test
public void main() throws Exception {
       

           BarcodePDF417 pdf417 = new BarcodePDF417();
           String text = "It was the best of times, it was the worst of times, " + 
               "it was the age of wisdom, it was the age of foolishness, " +
               "it was the epoch of belief, it was the epoch of incredulity, " +
               "it was the season of Light, it was the season of Darkness, " +
               "it was the spring of hope, it was the winter of despair, " +
               "we had everything before us, we had nothing before us, " +
               "we were all going direct to Heaven, we were all going direct " +
               "the other way - in short, the period was so far like the present " +
               "period, that some of its noisiest authorities insisted on its " +
               "being received, for good or for evil, in the superlative degree " +
               "of comparison only.";
           pdf417.setText(text);
           Document document = new Document(PageSize.A4, 50, 50, 50, 50);
           PdfWriter.getInstance(document, PdfTestBase.getOutputStream( "pdf417.pdf"));
           document.open();
           Image img = pdf417.getImage();
           img.scalePercent(50, 50 * pdf417.getYHeight());
           document.add(img);
           document.close();

}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * M�todo que permite introducir un c�digo de barras de nube de puntos que represente el texto
 * que se pasa como par�metro. Se debe indicar la p�gina del PDF donde se debe introducir
 * el c�digo (normlamente la p�gina 1) y la posici�n absoluta X e Y dentro de la p�gina.
 */
public void establecerBarCodeNP (int Pagina, String texto, int XPos, int YPos) throws Exception
{
		BarcodePDF417 code417 = new BarcodePDF417();	
		code417.setText(texto);	
		Image img = code417.getImage();
		img.setAbsolutePosition(XPos, YPos);
		//Inicialmente lo dejamos a la misma escala. Falta comprobar si es necesario aumentarla o
		//disminuirla.
		img.scalePercent(100, 100);	
		pdfs.getOverContent(Pagina).addImage(img);						
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/** 
 * Establece una imagen en una posici�n indic�ndole un porcentaje de ampliaci�n/reducci�n
 *     
 * @param	nPagina	Indica el n�mero de p�gina donde se inertar� la imagen
 * @param   a_Imagen Indica el byte[] de la imagen a insertar
 * @param   a_posX Indica la posici�n X absoluta dentro del PDF donde se colocar� la imagen
 * @param   a_posY Indica la posici�n Y absoluta dentro del PDF donde se colocar� la imagen
 */
public void establecerImagen (int nPagina, byte[] a_Imagen, float a_posX, float a_posY, float af_porcentaje) throws Exception
{
	Image imagen = Image.getInstance(a_Imagen);
	imagen.scalePercent(af_porcentaje);
	imagen.setAbsolutePosition(a_posX, a_posY);
	imagen.setTransparency(new int[] {255, 255,255, 255, 255, 255});
	pdfs.getOverContent(nPagina).addImage(imagen);
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Generate barcode in the form
 *
 * @param pdfStamper
 * @throws DocumentException
 */
private void generateBarcode(PdfStamper pdfStamper, String userId) throws DocumentException {

    // add barcode on the first page
    PdfContentByte cb = pdfStamper.getOverContent(BARCODE_PAGE);

    // barcode format 128C
    Barcode128 code128 = new Barcode128();

    // barcode format e.g. *1502A1234567890
    //  asterisk - * [constant]
    //  WebPOS Transaction - 1502 [constant]
    //  Form Version - A [constant for MyPost 1.5]
    //  10-digit APCN
    code128.setCode(ASTERISK + WEBPOS_TRANSACTIION + MYPOST_FORM_VERSION + userId);

    code128.setCodeType(Barcode128.CODE128);

    // convert barcode into image
    Image code128Image = code128.createImageWithBarcode(cb, null, null);

    // set barcode position x pixel, y pixel
    code128Image.setAbsolutePosition(BARCODE_POSITION_X, BARCODE_POSITION_Y);
    code128Image.scalePercent(BARCODE_SCALE_PERCENTAGE);

    // add barcode image into PDF template
    cb.addImage(code128Image);
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Generate a QR code including URL on the page
 * 
 * @param pdfStamper
 * @throws DocumentException
 */
private void generateQRCode(PdfStamper pdfStamper) throws DocumentException {

    // add barcode on the first page
    PdfContentByte pdfContentByte = pdfStamper.getOverContent(APPENDED_PAGE);

    BarcodeQRCode qrcode = new BarcodeQRCode("http://www.vendian.org/mncharity/dir3/paper_rulers/", 200, 200, null);
    Image qrcodeImage = qrcode.getImage();
    qrcodeImage.setAbsolutePosition(360,500);
    qrcodeImage.scalePercent(100);
    pdfContentByte.addImage(qrcodeImage);
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Returns the height of the cell.
 * @return	the height of the cell
 * @since	3.0.0
 */
public float getMaxHeight() {
	boolean pivoted = (getRotation() == 90 || getRotation() == 270);
	Image img = getImage();
	if (img != null) {
		img.scalePercent(100);
		float refWidth = pivoted ? img.getScaledHeight() : img.getScaledWidth();
		float scale = (getRight() - getEffectivePaddingRight()
                   - getEffectivePaddingLeft() - getLeft()) / refWidth;
		img.scalePercent(scale * 100);
		float refHeight = pivoted ? img.getScaledWidth() : img.getScaledHeight();
		setBottom(getTop() - getEffectivePaddingTop() - getEffectivePaddingBottom() - refHeight);
	}
	else {
		if ((pivoted && hasFixedHeight()) || getColumn() == null)
			setBottom(getTop() - getFixedHeight());
		else {
			ColumnText ct = ColumnText.duplicate(getColumn());
			float right, top, left, bottom;
			if (pivoted) {
				right = PdfPRow.RIGHT_LIMIT;
				top = getRight() - getEffectivePaddingRight();
				left = 0;
				bottom = getLeft() + getEffectivePaddingLeft();
			}
			else {
				right = isNoWrap() ? PdfPRow.RIGHT_LIMIT : getRight() - getEffectivePaddingRight();
				top = getTop() - getEffectivePaddingTop();
				left = getLeft() + getEffectivePaddingLeft();
				bottom = hasFixedHeight() ? getTop() + getEffectivePaddingBottom() - getFixedHeight() : PdfPRow.BOTTOM_LIMIT;
			}
			PdfPRow.setColumn(ct, left, bottom, right, top);
			try {
				ct.go(true);
			} catch (DocumentException e) {
				throw new ExceptionConverter(e);
			}
			if (pivoted)
				setBottom(getTop() - getEffectivePaddingTop() - getEffectivePaddingBottom() - ct.getFilledWidth());
			else {
				float yLine = ct.getYLine();
				if (isUseDescender())
					yLine += ct.getDescender();
				setBottom(yLine - getEffectivePaddingBottom());
			}
		}
	}
	float height = getHeight();
	if (hasFixedHeight())
		height = getFixedHeight();
	else if (height < getMinimumHeight())
		height = getMinimumHeight();
	return height;
}
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
    * PdfTemplates can be wrapped in an Image.
    */
@Test
   public  void main() throws Exception {
       
           
       // step 1: creation of a document-object
       Rectangle rect = new Rectangle(PageSize.A4);
       rect.setBackgroundColor(new Color(238, 221, 88));
       Document document = new Document(rect, 50, 50, 50, 50);
	// step 2: we create a writer that listens to the document
	PdfWriter writer = PdfWriter.getInstance(document, PdfTestBase.getOutputStream("templateImages.pdf"));
	// step 3: we open the document
	document.open();
	// step 4:
	PdfTemplate template = writer.getDirectContent().createTemplate(20, 20);
	BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI,
			BaseFont.NOT_EMBEDDED);
	String text = "Vertical";
	float size = 16;
	float width = bf.getWidthPoint(text, size);
	template.beginText();
	template.setRGBColorFillF(1, 1, 1);
	template.setFontAndSize(bf, size);
	template.setTextMatrix(0, 2);
	template.showText(text);
	template.endText();
	template.setWidth(width);
	template.setHeight(size + 2);
	template.sanityCheck();
	Image img = Image.getInstance(template);
	img.setRotationDegrees(90);
	Chunk ck = new Chunk(img, 0, 0);
	PdfPTable table = new PdfPTable(3);
	table.setWidthPercentage(100);
	table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);
	table.getDefaultCell().setVerticalAlignment(Element.ALIGN_MIDDLE);
	PdfPCell cell = new PdfPCell(img);
	cell.setPadding(4);
	cell.setBackgroundColor(new Color(0, 0, 255));
	cell.setHorizontalAlignment(Element.ALIGN_CENTER);
	table.addCell("I see a template on my right");
	table.addCell(cell);
	table.addCell("I see a template on my left");
	table.addCell(cell);
	table.addCell("I see a template everywhere");
	table.addCell(cell);
	table.addCell("I see a template on my right");
	table.addCell(cell);
	table.addCell("I see a template on my left");

	Paragraph p1 = new Paragraph("This is a template ");
	p1.add(ck);
	p1.add(" just here.");
	p1.setLeading(img.getScaledHeight() * 1.1f);
	document.add(p1);
	document.add(table);
	Paragraph p2 = new Paragraph("More templates ");
	p2.setLeading(img.getScaledHeight() * 1.1f);
	p2.setAlignment(Element.ALIGN_JUSTIFIED);
	img.scalePercent(70);
	for (int k = 0; k < 20; ++k)
		p2.add(ck);
	document.add(p2);
	// step 5: we close the document
	document.close();

   }
 

import com.lowagie.text.Image; //导入方法依赖的package包/类
/**
 * Images wrapped in a Chunk.
 */
@Test
public void main() throws Exception {

	// step 1: creation of a document-object
	Document document = new Document();
	// step 2:
	// we create a writer that listens to the document
	// and directs a PDF-stream to a file
	PdfWriter.getInstance(document, PdfTestBase.getOutputStream("imageChunks.pdf"));
	// step 3: we open the document
	document.open();
	// step 4: we create a table and add it to the document
	Image img = Image.getInstance(PdfTestBase.RESOURCES_DIR + "pngnow.png");
	img.scalePercent(70);
	Chunk ck = new Chunk(img, 0, -5);
	PdfPTable table = new PdfPTable(3);
	PdfPCell cell = new PdfPCell();
	cell.addElement(new Chunk(img, 5, -5));
	cell.setBackgroundColor(new Color(0xC0, 0xC0, 0xC0));
	cell.setHorizontalAlignment(Element.ALIGN_CENTER);
	table.addCell("I see an image\non my right");
	table.addCell(cell);
	table.addCell("I see an image\non my left");
	table.addCell(cell);
	table.addCell("I see images\neverywhere");
	table.addCell(cell);
	table.addCell("I see an image\non my right");
	table.addCell(cell);
	table.addCell("I see an image\non my left");

	Phrase p1 = new Phrase("This is an image ");
	p1.add(ck);
	p1.add(" just here.");
	document.add(p1);
	document.add(p1);
	document.add(p1);
	document.add(p1);
	document.add(p1);
	document.add(p1);
	document.add(p1);
	document.add(table);

	// step 5: we close the document
	document.close();
}