Examples with ImageTypeSpecifier javax.imageio.ImageTypeSpecifier used on opensource projects

Example 76 with ImageTypeSpecifier

use of javax.imageio.ImageTypeSpecifier in project imageio-ext by geosolutions-it.

the class JpegVrtTest method sourceBands.

/**
 * Test sourceBands management capabilities.
 *
 * @throws FileNotFoundException
 * @throws IOException
 */
@Test
public void sourceBands() throws IOException, FileNotFoundException {
    if (!isGDALAvailable) {
        return;
    }
    final File inputFile = TestData.file(this, "small_world.jpg.vrt");
    // //
    // 
    // Preparing srcRegion constants
    // 
    // //
    final int srcRegionX = 40;
    final int srcRegionY = 50;
    final int srcRegionWidth = 400;
    final int srcRegionHeight = 300;
    final int subSamplingX = 2;
    final int subSamplingY = 1;
    // //
    // 
    // Setting source settings parameters
    // 
    // //
    ImageReadParam rparam = new ImageReadParam();
    rparam.setSourceRegion(new Rectangle(srcRegionX, srcRegionY, srcRegionWidth, srcRegionHeight));
    rparam.setSourceSubsampling(subSamplingX, subSamplingY, 0, 0);
    rparam.setSourceBands(new int[] { 0 });
    // //
    // 
    // Setting destination settings parameters
    // 
    // //
    rparam.setDestinationBands(new int[] { 0 });
    ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
    ColorModel cm = RasterFactory.createComponentColorModel(// dataType
    DataBuffer.TYPE_BYTE, // color space
    cs, // has alpha
    false, // is alphaPremultiplied
    false, // transparency
    Transparency.OPAQUE);
    final int destWidth = srcRegionWidth / subSamplingX;
    final int destHeight = srcRegionHeight / subSamplingY;
    Assert.assertEquals(destWidth, 200);
    Assert.assertEquals(destHeight, 300);
    final SampleModel sm = cm.createCompatibleSampleModel(destWidth, destHeight);
    rparam.setDestinationType(new ImageTypeSpecifier(cm, sm));
    // //
    // 
    // Preparing for image read operation
    // 
    // //
    final ParameterBlockJAI pbjImageRead = new ParameterBlockJAI("ImageRead");
    pbjImageRead.setParameter("Input", inputFile);
    pbjImageRead.setParameter("readParam", rparam);
    final ImageLayout l = new ImageLayout();
    l.setTileGridXOffset(0).setTileGridYOffset(0).setTileHeight(128).setTileWidth(128);
    RenderedOp image = JAI.create("ImageRead", pbjImageRead, new RenderingHints(JAI.KEY_IMAGE_LAYOUT, l));
    if (TestData.isInteractiveTest())
        Viewer.visualizeAllInformation(image, "imageread");
    else
        Assert.assertNotNull(image.getTiles());
    ImageIOUtilities.disposeImage(image);
}

Example 77 with ImageTypeSpecifier

use of javax.imageio.ImageTypeSpecifier in project imageio-ext by geosolutions-it.

the class JpegJMagickImageReader method getImageTypes.

public Iterator<ImageTypeSpecifier> getImageTypes(int imageIndex) throws IOException {
    synchronized (imagesLayouts) {
        checkImageIndex(imageIndex);
        final ImageLayout layout = (imagesLayouts.get(imageIndex)).getLayout();
        return Collections.singletonList(new ImageTypeSpecifier(layout.getColorModel(null), layout.getSampleModel(null))).iterator();
    }
}

Example 78 with ImageTypeSpecifier

use of javax.imageio.ImageTypeSpecifier in project imageio-ext by geosolutions-it.

the class JPEGReadTest method sourceBands.

/**
 * Test sourceBands management capabilities.
 *
 * @throws FileNotFoundException
 * @throws IOException
 */
@Test
public void sourceBands() throws IOException, FileNotFoundException {
    if (!isGDALAvailable) {
        return;
    }
    final File inputFile = TestData.file(this, "small_world.jpg");
    // //
    // 
    // Preparing srcRegion constants
    // 
    // //
    final int srcRegionX = 40;
    final int srcRegionY = 50;
    final int srcRegionWidth = 400;
    final int srcRegionHeight = 300;
    final int subSamplingX = 2;
    final int subSamplingY = 1;
    // //
    // 
    // Setting source settings parameters
    // 
    // //
    ImageReadParam rparam = new ImageReadParam();
    rparam.setSourceRegion(new Rectangle(srcRegionX, srcRegionY, srcRegionWidth, srcRegionHeight));
    rparam.setSourceSubsampling(subSamplingX, subSamplingY, 0, 0);
    rparam.setSourceBands(new int[] { 0 });
    // //
    // 
    // Setting destination settings parameters
    // 
    // //
    rparam.setDestinationBands(new int[] { 0 });
    ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
    ColorModel cm = RasterFactory.createComponentColorModel(// dataType
    DataBuffer.TYPE_BYTE, // color space
    cs, // has alpha
    false, // is alphaPremultiplied
    false, // transparency
    Transparency.OPAQUE);
    final int destWidth = srcRegionWidth / subSamplingX;
    final int destHeight = srcRegionHeight / subSamplingY;
    Assert.assertEquals(destWidth, 200);
    Assert.assertEquals(destHeight, 300);
    final SampleModel sm = cm.createCompatibleSampleModel(destWidth, destHeight);
    rparam.setDestinationType(new ImageTypeSpecifier(cm, sm));
    // //
    // 
    // Preparing for image read operation
    // 
    // //
    ImageReader reader = new JpegGDALImageReaderSpi().createReaderInstance();
    final ParameterBlockJAI pbjImageRead = new ParameterBlockJAI("ImageRead");
    pbjImageRead.setParameter("Input", inputFile);
    pbjImageRead.setParameter("reader", reader);
    pbjImageRead.setParameter("readParam", rparam);
    final ImageLayout l = new ImageLayout();
    l.setTileGridXOffset(0).setTileGridYOffset(0).setTileHeight(128).setTileWidth(128);
    RenderedOp image = JAI.create("ImageRead", pbjImageRead, new RenderingHints(JAI.KEY_IMAGE_LAYOUT, l));
    if (TestData.isInteractiveTest())
        Viewer.visualizeAllInformation(image, "imageread");
    else
        Assert.assertNotNull(image.getTiles());
    ImageIOUtilities.disposeImage(image);
}

Example 79 with ImageTypeSpecifier

use of javax.imageio.ImageTypeSpecifier in project imageio-ext by geosolutions-it.

the class GDALImageReader method getImageTypes.

/**
 * Returns an <code>Iterator</code> containing possible image types to
 * which the given image may be decoded, in the form of
 * <code>ImageTypeSpecifiers</code>s. At least one legal image type will
 * be returned. This implementation simply returns an
 * <code>ImageTypeSpecifier</code> set in compliance with the property of
 * the dataset contained within the underlying data source.
 *
 * @param imageIndex
 *                the index of the image to be retrieved.
 *
 * @return an <code>Iterator</code> containing possible image types to
 *         which the given image may be decoded, in the form of
 *         <code>ImageTypeSpecifiers</code>s
 */
public Iterator<ImageTypeSpecifier> getImageTypes(int imageIndex) throws IOException {
    final List<ImageTypeSpecifier> l = new java.util.ArrayList<ImageTypeSpecifier>(4);
    final GDALCommonIIOImageMetadata item = getDatasetMetadata(imageIndex);
    imageType = new ImageTypeSpecifier(item.getColorModel(), item.getSampleModel());
    l.add(imageType);
    return l.iterator();
}

Example 80 with ImageTypeSpecifier

use of javax.imageio.ImageTypeSpecifier in project imageio-ext by geosolutions-it.

the class AsciiGridsImageReader method initializeReader.

/**
 * This method initializes the {@link AsciiGridsImageReader} (if it has
 * already decoded an input source) by setting some fields, like the
 * imageInputStream, the {@link ColorModel} and the {@link SampleModel},
 * the image dimensions and so on.
 */
private void initializeReader() {
    if (LOGGER.isLoggable(Level.FINE)) {
        LOGGER.info("Data Initializing");
        LOGGER.info("\tImageInputStream: \t" + imageInputStream.toString());
        LOGGER.info("\tRasterType:\t\t\t " + rasterReader.getRasterType().toString());
    }
    // Image dimensions initialization
    width = rasterReader.getNCols();
    height = rasterReader.getNRows();
    // calculating the imageSize. Its value is given by
    // nRows*nCols*sampleSizeByte (if DataType is Float
    // the size of each sample is 32 bit = 4 Byte)
    final int sampleSizeBit = cm.getPixelSize();
    final int sampleSizeByte = (sampleSizeBit + 7) / 8;
    imageSize = width * height * sampleSizeByte;
    // (MIN_SIZE_NEED_TILING), the image needs to be tiled
    if (imageSize >= MIN_SIZE_NEED_TILING) {
        isTiled = true;
        // This implementation supposes that tileWidth is equal to the width
        // of the whole image
        tileWidth = width;
        // actually (need improvements) tileHeight is given by
        // the default tile size divided by the tileWidth multiplied by the
        // sample size (in byte)
        tileHeight = DEFAULT_TILE_SIZE / (tileWidth * sampleSizeByte);
        // if computed tileHeight is zero, it is setted to 1 as precaution
        if (tileHeight < 1) {
            tileHeight = 1;
        }
        // //
        // 
        // Trick to handle very large rasters
        // 
        // //
        sm = cm.createCompatibleSampleModel(tileWidth, tileHeight);
        rasterReader.setTilesSize(tileWidth, tileHeight);
    } else {
        // If no Tiling needed, I set the tile sizes equal to the image
        // sizes
        tileWidth = width;
        tileHeight = height;
    }
    // this is a trick to workaround
    sm = cm.createCompatibleSampleModel(tileHeight, tileWidth);
    // image type specifier
    imageType = new ImageTypeSpecifier(cm, sm);
}