Examples with PNGImageWriterSPI it.geosolutions.imageio.plugins.png.PNGImageWriterSPI used on opensource projects

Example 6 with PNGImageWriterSPI

use of it.geosolutions.imageio.plugins.png.PNGImageWriterSPI in project imageio-ext by geosolutions-it.

the class PngSuiteImagesTest method roundTripPNGJ.

private void roundTripPNGJ(BufferedImage original, RenderedImage source) throws Exception {
    // write the PNG
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 4f / 9 - 1;
    new PNGWriter().writePNG(original, bos, -quality, FilterType.FILTER_NONE);
    // write the output to file for eventual visual comparison
    byte[] bytes = bos.toByteArray();
    writeToFile(new File("./target/roundTripNone", sourceFile.getName()), bytes);
    // read it back
    ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
    BufferedImage image = ImageIO.read(bis);
    ImageAssert.assertImagesEqual(original, image);
    // now using imagewriter interface
    ImageWriter writer = new PNGImageWriterSPI().createWriterInstance();
    writer.setOutput(bos);
    ImageWriteParam wp = writer.getDefaultWriteParam();
    wp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    wp.setCompressionQuality(-quality);
    writer.write(null, new IIOImage(original, null, null), wp);
    writer.dispose();
    ImageAssert.assertImagesEqual(original, ImageIO.read(new ByteArrayInputStream(bos.toByteArray())));
}

Example 7 with PNGImageWriterSPI

use of it.geosolutions.imageio.plugins.png.PNGImageWriterSPI in project imageio-ext by geosolutions-it.

the class BufferedImageTypesTest method compareImage.

@Test
public void compareImage() throws Exception {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 4f / 9 - 1;
    new PNGWriter().writePNG(image, bos, -quality, FilterType.FILTER_NONE);
    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    BufferedImage readBack = ImageIO.read(bis);
    boolean success = false;
    try {
        ImageAssert.assertImagesEqual(image, readBack);
        success = true;
    } finally {
        if (!success) {
            ImageIO.write(image, "PNG", new File("./target/" + name + "_expected.png"));
            ImageIO.write(readBack, "PNG", new File("./target/" + name + "_actual.png"));
        }
    }
    // now using imagewriter interface
    ImageWriter writer = new PNGImageWriterSPI().createWriterInstance();
    writer.setOutput(bos);
    ImageWriteParam wp = writer.getDefaultWriteParam();
    wp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    wp.setCompressionQuality(-quality);
    writer.write(null, new IIOImage(image, null, null), wp);
    writer.dispose();
    bis = new ByteArrayInputStream(bos.toByteArray());
    readBack = ImageIO.read(bis);
    success = false;
    try {
        ImageAssert.assertImagesEqual(image, readBack);
        success = true;
    } finally {
        if (!success) {
            ImageIO.write(image, "PNG", new File("./target/" + name + "_expected.png"));
            ImageIO.write(readBack, "PNG", new File("./target/" + name + "_actual.png"));
        }
    }
}