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

Example 1 with PNGImageWriterSPI

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

the class CustomByteIndexImageTypesTest method testCustomIndexedImage.

@Test
public void testCustomIndexedImage() throws Exception {
    byte[] colors = new byte[ncolors];
    for (int i = 0; i < ncolors; i++) {
        colors[i] = (byte) i;
    }
    int nbits;
    if (ncolors <= 2) {
        nbits = 1;
    } else {
        nbits = (int) Math.ceil(Math.log(ncolors) / Math.log(2));
        if ((nbits & (nbits - 1)) != 0) {
            int nextPower = (int) (Math.floor(Math.log(nbits) / Math.log(2)) + 1);
            nbits = (int) Math.pow(2, nextPower);
        }
    }
    IndexColorModel icm = new IndexColorModel(nbits, ncolors, colors, colors, colors);
    SampleModel sm = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE, size, size, nbits);
    int pixelsPerByte = 8 / nbits;
    int bytesPerRow = (int) Math.max(1, Math.ceil(1d * size / pixelsPerByte));
    int bytes = bytesPerRow * size;
    DataBufferByte dataBuffer = new DataBufferByte(bytes);
    WritableRaster wr = (WritableRaster) Raster.createWritableRaster(sm, dataBuffer, new Point(0, 0));
    BufferedImage bi = new BufferedImage(icm, wr, false, null);
    Graphics2D graphics = bi.createGraphics();
    graphics.setColor(Color.BLACK);
    graphics.fillRect(0, 0, 16, 32);
    graphics.setColor(Color.WHITE);
    graphics.fillRect(16, 0, 16, 32);
    graphics.dispose();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 5f / 9 - 1;
    new PNGWriter().writePNG(bi, bos, -quality, FilterType.FILTER_NONE);
    BufferedImage read = ImageIO.read(new ByteArrayInputStream(bos.toByteArray()));
    ImageAssert.assertImagesEqual(bi, read);
    // 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(bi, null, null), wp);
    writer.dispose();
    ImageAssert.assertImagesEqual(bi, ImageIO.read(new ByteArrayInputStream(bos.toByteArray())));
}

Example 2 with PNGImageWriterSPI

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

the class SPITest method testSPI.

@Test
public void testSPI() throws Exception {
    boolean found = false;
    Iterator<ImageWriter> it = ImageIO.getImageWritersByFormatName("PNG");
    while (it.hasNext()) {
        ImageWriter wr = it.next();
        if (wr.getOriginatingProvider() instanceof PNGImageWriterSPI) {
            found = true;
            break;
        }
    }
    // did we find it
    assertTrue("Unable to find PNGImageWriterSPI", found);
}

Example 3 with PNGImageWriterSPI

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

the class BufferedImageChildTest method testSubImage.

private void testSubImage(int x, int y, int w, int h) throws Exception {
    BufferedImage bi = getSample();
    // ImageAssert.showImage("Original", 2000, bi);
    BufferedImage subimage = bi.getSubimage(x, y, w, h);
    // ImageAssert.showImage("Subimage", 2000, subimage);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 4f / 9 - 1;
    new PNGWriter().writePNG(subimage, bos, -quality, FilterType.FILTER_NONE);
    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    BufferedImage readBack = ImageIO.read(bis);
    // ImageAssert.showImage("ReadBack", 2000, readBack);
    ImageAssert.assertImagesEqual(subimage, readBack);
    // 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(subimage, null, null), wp);
    writer.dispose();
    bis = new ByteArrayInputStream(bos.toByteArray());
    readBack = ImageIO.read(bis);
    // ImageAssert.showImage("ReadBack", 2000, readBack);
    ImageAssert.assertImagesEqual(subimage, readBack);
}

Example 4 with PNGImageWriterSPI

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

the class GrayAlpha8bitTest method testGrayAlpha8Bit.

@Test
public void testGrayAlpha8Bit() throws Exception {
    BufferedImage bi = new BufferedImage(50, 50, BufferedImage.TYPE_BYTE_GRAY);
    Graphics2D graphics = bi.createGraphics();
    graphics.setColor(Color.BLACK);
    graphics.fillRect(0, 0, 16, 32);
    graphics.setColor(Color.WHITE);
    graphics.fillRect(16, 0, 16, 32);
    graphics.dispose();
    final ImageLayout tempLayout = new ImageLayout(bi);
    tempLayout.unsetValid(ImageLayout.COLOR_MODEL_MASK).unsetValid(ImageLayout.SAMPLE_MODEL_MASK);
    RenderedImage alpha = ConstantDescriptor.create(Float.valueOf(bi.getWidth()), Float.valueOf(bi.getHeight()), new Byte[] { Byte.valueOf((byte) 255) }, new RenderingHints(JAI.KEY_IMAGE_LAYOUT, tempLayout));
    RenderedImage grayAlpha = BandMergeDescriptor.create(bi, alpha, null);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 5f / 9 - 1;
    new PNGWriter().writePNG(grayAlpha, bos, -quality, FilterType.FILTER_NONE);
    BufferedImage read = ImageIO.read(new ByteArrayInputStream(bos.toByteArray()));
    BufferedImage gaBuffered = PlanarImage.wrapRenderedImage(grayAlpha).getAsBufferedImage();
    ImageAssert.assertImagesEqual(gaBuffered, read);
    // 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(bi, null, null), wp);
    writer.dispose();
    ImageAssert.assertImagesEqual(bi, ImageIO.read(new ByteArrayInputStream(bos.toByteArray())));
}

Example 5 with PNGImageWriterSPI

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

the class CustomUShortImageTypesTest method testCustomUShortImage.

@Test
public void testCustomUShortImage() throws Exception {
    BufferedImage bi = ImageTypeSpecifier.createGrayscale(nbits, DataBuffer.TYPE_USHORT, false).createBufferedImage(size, size);
    Graphics2D graphics = bi.createGraphics();
    graphics.setColor(Color.BLACK);
    graphics.fillRect(0, 0, 16, 32);
    graphics.setColor(Color.WHITE);
    graphics.fillRect(16, 0, 16, 32);
    graphics.dispose();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    float quality = 5f / 9 - 1;
    new PNGWriter().writePNG(bi, bos, -quality, FilterType.FILTER_NONE);
    BufferedImage read = ImageIO.read(new ByteArrayInputStream(bos.toByteArray()));
    ImageAssert.assertImagesEqual(bi, read);
    // 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(bi, null, null), wp);
    writer.dispose();
    ImageAssert.assertImagesEqual(bi, ImageIO.read(new ByteArrayInputStream(bos.toByteArray())));
}