com.htmlhifive.pitalium.sample.pdf.PDFReadTest.java Source code

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Here is the source code for com.htmlhifive.pitalium.sample.pdf.PDFReadTest.java

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/*
 * Copyright (C) 2015-2016 NS Solutions Corporation
 *
 * 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 com.htmlhifive.pitalium.sample.pdf;

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

import javax.imageio.ImageIO;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.junit.Assert;
import org.junit.Test;

import com.htmlhifive.pitalium.core.config.ExecMode;
import com.htmlhifive.pitalium.core.config.PtlTestConfig;
import com.htmlhifive.pitalium.image.model.DiffPoints;
import com.htmlhifive.pitalium.image.model.ImageComparedResult;
import com.htmlhifive.pitalium.image.util.ImageUtils;

/**
 * Pitalim?PDF? <br/>
 * PDF????Apache PDFBox(https://pdfbox.apache.org/) ???
 */
public class PDFReadTest {

    private static final String EXPORT_FILE_PATH = "./exports/pdf/";

    /**
     * ?PDF?????????<br />
     * ????????
     *
     * @throws IOException
     */
    @Test
    public void testCreateImageFromPDF() throws IOException {

        // PDF??????
        if (PtlTestConfig.getInstance().getEnvironment().getExecMode() == ExecMode.SET_EXPECTED) {
            savePdfAsImages("sample_expected");
            return;
        }

        int numberOfPages = savePdfAsImages("sample_actual");
        if (numberOfPages < 0) {
            Assert.fail("PDF???????");
        }

        // Pitalium??
        // ?sample_expected.pdf???sample_actual.pdf?
        for (int i = 0; i < numberOfPages; i++) {
            BufferedImage leftImage = readImage(EXPORT_FILE_PATH + "sample_expected" + i + ".png");
            BufferedImage rightImage = readImage(EXPORT_FILE_PATH + "sample_actual" + i + ".png");
            if (leftImage == null || rightImage == null) {
                Assert.fail("??????");
            }

            ImageComparedResult result = ImageUtils.compare(leftImage, null, rightImage, null, null);

            // ????
            if (result.isFailed()) {
                DiffPoints diffPoints = (DiffPoints) result;
                final BufferedImage diffImage = ImageUtils.getDiffImage(leftImage, rightImage, diffPoints);
                saveExportImage(diffImage, "diffImage.png");
                Assert.fail("PDF????");
            }
        }

    }

    /**
     * PDF?????????<br/>
     * PDF?1?????1???<br/>
     * PDF??????Apache PDFBox?
     *
     * @param fileName ?PDF???.pdf???
     * @return ?????PDF?
     */
    private int savePdfAsImages(String fileName) {
        int numberOfPages = 0;

        try (BufferedInputStream fileToParse = new BufferedInputStream(
                getClass().getResourceAsStream(fileName + ".pdf")); PDDocument pdf = PDDocument.load(fileToParse)) {
            // 1=1?????
            final PDFRenderer pdfRenderer = new PDFRenderer(pdf);
            numberOfPages = pdf.getNumberOfPages();

            for (int i = 0; i < numberOfPages; i++) {
                final BufferedImage image = pdfRenderer.renderImageWithDPI(i, 300, ImageType.RGB);
                if (!saveExportImage(image, fileName + i + ".png")) {
                    return -1;
                }
            }
        } catch (IOException e) {
            return -1;
        }

        return numberOfPages;
    }

    /**
     * EXPORT_PATH????
     *
     * @param image ???
     * @param fileName ????
     * @return ????????true?????????false
     */
    private boolean saveExportImage(BufferedImage image, String fileName) {
        File exportDir = new File(EXPORT_FILE_PATH);
        if (!exportDir.exists()) {
            exportDir.mkdirs();
        }

        try {
            return ImageIO.write(image, "png", new File(EXPORT_FILE_PATH + fileName));
        } catch (IOException e) {
            return false;
        }
    }

    /**
     * ????
     *
     * @param filePath ??
     * @return ????BufferedImage
     */
    private BufferedImage readImage(String filePath) {
        File image = new File(filePath);
        if (!image.exists()) {
            return null;
        }

        try {
            return ImageIO.read(image);
        } catch (IOException e) {
            return null;
        }
    }
}