boxtable.cell.ImageCell.java Source code

Introduction

Here is the source code for boxtable.cell.ImageCell.java

Source

/*
 * Copyright 2017 Dominik Helm
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package boxtable.cell;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;

/**
 * A cell that shows an image
 * 
 * @author Dominik Helm
 */
public class ImageCell extends Cell {
    /** The file the image resides at */
    private final File file;

    /**
     * Creates an ImageCell for a specific image
     * 
     * @param file
     *            The file the image resides at
     */
    public ImageCell(final File file) {
        this.file = file;
    }

    /*
     * (non-Javadoc)
     * 
     * @see boxtable.cell.Cell#render(org.apache.pdfbox.pdmodel.PDDocument, org.apache.pdfbox.pdmodel.PDPageContentStream, float, float, float, float)
     */
    @Override
    public void render(final PDDocument document, final PDPageContentStream stream, final float left,
            final float top, final float width, final float height) throws IOException {
        final BufferedImage image = ImageIO.read(file);

        float contentWidth = width - (leftBorder + rightBorder) / 2 - leftPadding - rightPadding;
        float contentHeight = height - (topBorder + bottomBorder) / 2 - topPadding - bottomPadding;

        float imgWidth = image.getWidth();
        float imgHeight = image.getHeight();
        final float ratio = imgWidth / imgHeight;
        if (imgWidth > contentWidth) {
            imgWidth = contentWidth;
            imgHeight = 1 / ratio * imgWidth;
        }
        if (imgHeight > contentHeight) {
            imgHeight = contentHeight;
            imgWidth = ratio * imgHeight;
        }

        super.render(document, stream, left + (width - imgWidth) * hAlign, top - (height - imgHeight) * vAlign,
                imgWidth, imgHeight);

        final PDImageXObject imageObject = JPEGFactory.createFromImage(document, image);
        stream.drawImage(imageObject, left + (width - imgWidth) * hAlign + leftBorder / 2 + leftPadding,
                top - height + (height - imgHeight) * (1 - vAlign) - topBorder / 2 - topPadding, imgWidth,
                imgHeight);
    }
}