import java.io.File;
import java.io.IOException;

import com.gnostice.pdfone.PDFOne;
import com.gnostice.pdfone.PdfDocument;
import com.gnostice.pdfone.PdfException;
import com.gnostice.pdfone.PdfImage;
import com.gnostice.pdfone.PdfMeasurement;
import com.gnostice.pdfone.PdfPage;
import com.gnostice.pdfone.PdfWriter;


public class PdfImage_Examples
{
    // Activates the component PDFOne.jar
    static
    {
        PDFOne.activate("T95VZE:W8HBPVA:74VQ8QV:LO4V8",
            "9B1HRZAP:X5853ERNE:5EREMEGRQ:TX1R10");
    }

    public static void main(String[] args) throws IOException,
        PdfException
    {
        PdfImage_Examples obj = new PdfImage_Examples();

        // To try other examples, add the obj.<example_method>
        // accordingly. For example, try:
        // obj.FileDimensions_Example();
        obj.Rotation_Example();
    }

    // This code segment creates a PdfImage object and draws it
    // twice - one with measurement unit in inches and the other 
    // with pixels.
    public void intro_Example() throws IOException, PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_intro_example.pdf"));

        PdfDocument document = new PdfDocument(writer);

        // Creates a PdfImage object for a 468x60 pixels image file
        // located in the InputDocs directory of the current
        // directory.  
        PdfImage image = PdfImage.create("banner_img_468_60.jpg");


        document.setMeasurementUnit(PdfMeasurement.MU_INCHES);
        image.setWidth(5);
        image.setHeight(1);
        document.drawImage(image, 1, 1);

        document.setMeasurementUnit(PdfMeasurement.MU_PIXELS);
        image.setWidth(5 * 96);
        image.setHeight(1 * 96);
        document.drawImage(image, 100, 300);

        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }

    // This code segment creates a PdfImage object, obtains number of
    // bits per component (pixel) and writes the value to page.
    public void bitsPerComponent_Example() throws IOException,
        PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_bitspercomponent_"
                                   + "example.pdf"));

        PdfDocument document = new PdfDocument(writer);
        PdfPage page = new PdfPage();
        page.setMeasurementUnit(PdfMeasurement.MU_INCHES);

        // Creates a PdfImage object for banner_img_468_grey.jpg
        // located in the InputDocs directory of the current 
        // directory.
        PdfImage image = PdfImage.create(
                            "banner_img_468_60_8bpp.bmp");

        // Obtains the number of bits per component and writes it to
        // page.
        page.writeText(
                "Number of components in the colorspace : "
                + image.bitsPerComponent(),
                2,
                0.8);

        // Draws the image for reference
        page.drawImage(image, 1, 1);

        document.add(page);
        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }

    // This code segment creates a PdfImage object and draws it on the
    // screen. It then obtains the object's height and width values
    // and sets them to twice their original values.
    public void ObjectDimensions_Example() throws IOException, PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_objectdimensions_example.pdf"));

        PdfDocument document = new PdfDocument(writer);
        PdfPage page = new PdfPage();
        page.setMeasurementUnit(PdfMeasurement.MU_INCHES);

        // Creates a PdfImage object for banner_img_468_60.jpg
        // located in the InputDocs directory of the current 
        // directory.
        PdfImage image = PdfImage.create(
                            "banner_img_160_50.jpg");

        // Draws the object using its default height and width
        page.writeText(
                "Image drawn using default height and width",
                2,
                0.8);
        page.drawImage(image, 2, 1);

        // Obtains default height and weight values of the object
        // into variables
        float l = image.getHeight();
        float b = image.getWidth();

        // Sets height and width variables to twice the original
        // values
        l = l * 2;
        b = b * 2;

        // Sets new height and width values to the object
        image.setHeight(l);
        image.setWidth(b);

        // Draws the object using new object dimensions
        page.writeText(
                "Image drawn with twice the height and width",
                2,
                3.8);

        page.drawImage(image, 2, 4);

        document.add(page);
        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }

    // This code segment creates a PdfImage object and obtains the
    // height and width of the image. It then writes these values to
    // the page.
    public void FileDimensions_Example() throws IOException,
        PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_height_example.pdf"));

        PdfDocument document = new PdfDocument(writer);
        document.setVersion(PdfDocument.VERSION_1_4);

        PdfPage page = new PdfPage();
        page.setMeasurementUnit(PdfMeasurement.MU_INCHES);

        // Creates a PdfImage object for banner_img_468_60.jpg
        // located in the InputDocs directory of the current 
        // directory.
        PdfImage image = PdfImage.create(
                            "banner_img_468_60.jpg");

        // Obtains the height of the image and writes the value to
        // page
        page.writeText("Banner_img_468_60.jpg has a height of: "
                       + image.height()
                       + " pixels",
                       2,
                       0.8);

        // Obtains the width of the image and writes the value to
        // page
        page.writeText("Banner_img_468_60.jpg has a width of: "
                       + image.width()
                       + " pixels",
                       2,
                       1.2);

        // Draws the image for reference
        page.drawImage(image, 1, 1.6);

        document.add(page);
        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }

    // This code segment creates a PdfImage object and draws it on a
    // page. It then obtains the object's rotation angle, adds a
    // randomly chosen value (5 degrees) to it, and sets that as the
    // new rotation angle. When the object is drawn again, the image
    // is slanted.
    public void Rotation_Example() throws IOException, PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_getrotation_example.pdf"));

        PdfDocument document = new PdfDocument(writer);
        PdfPage page = new PdfPage();
        page.setMeasurementUnit(PdfMeasurement.MU_INCHES);

        // Creates a PdfImage object for banner_img_468_60.jpg
        // located in the InputDocs directory of the current 
        // directory.
        PdfImage image = PdfImage.create(
                            "banner_img_468_60.jpg");

        page.writeText(
               "Image drawn with its scaled width set to 400 pixels",
               200,
               80);
        page.drawImage(image, 1, 1);

        // Obtains current rotation angle
        float n = image.getRotation();

        // Sets rotation angle to 5 degrees so that the image is
        // slightly slanted
        n = n + 5;
        image.setRotation(n);
        page.writeText("Image redrawn but slanted", 1, 2.8);
        page.drawImage(image, 1, 3);

        document.add(page);
        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }

    // This code segment creates a PdfImage object for a given image
    // file located in a specified path and then draws it on a
    // document page.
    public void create_Example() throws IOException, PdfException
    {
        PdfWriter writer = PdfWriter.fileWriter(
                               new File(
                                   "pdfimage_create_example.pdf"));

        PdfDocument document = new PdfDocument(writer);
        PdfPage page = new PdfPage();
        page.setMeasurementUnit(PdfMeasurement.MU_INCHES);

        // Creates a PdfImage object using an image file
        PdfImage image = PdfImage.create(
                             "banner_img_468_60.jpg");

        page.writeText(
                "Image (banner_img_468_60.jpg) created and drawn",
                2,
                1.8);

        page.drawImage(image, 2, 2);

        document.add(page);
        document.setOpenAfterSave(true);
        document.write();
        writer.dispose();
    }
}