private void testAlphaRGB(boolean direct) {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(getSyntheticRGB(direct));
worker.applyOpacity(0.5f);
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
assertTrue(image.getColorModel().hasAlpha());
int sample = image.getTile(0, 0).getSample(0, 0, 3);
assertEquals(128, sample);
}
/**
* Visualize the content of given image if {@link #SHOW} is {@code true}.
*
* @param worker The worker for which to visualize the image.
* @param title The title to be given to the windows.
*/
private static void show(final ImageWorker worker, final String title) {
if (SHOW) {
Viewer.show(worker.getRenderedImage(), title);
} else {
assertNotNull(
worker
.getRenderedImage()
.getTile(
worker.getRenderedImage().getMinTileX(),
worker.getRenderedImage().getMinTileY())); // Force computation.
}
}
@Test
public void testOpacityGray() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(gray);
worker.applyOpacity(0.5f);
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
assertTrue(image.getColorModel().hasAlpha());
int sample = image.getTile(0, 0).getSample(0, 0, 1);
assertEquals(128, sample);
}
@Test
public void test4BitPNG() throws Exception {
// create test image
IndexColorModel icm =
new IndexColorModel(
4,
16,
new byte[] {(byte) 255, 0, 0, 0, 16, 32, 64, (byte) 128, 1, 2, 3, 4, 5, 6, 7, 8},
new byte[] {0, (byte) 255, 0, 0, 16, 32, 64, (byte) 128, 1, 2, 3, 4, 5, 6, 7, 8},
new byte[] {0, 0, (byte) 255, 0, 16, 32, 64, (byte) 128, 1, 2, 3, 4, 5, 6, 7, 8});
assertEquals(16, icm.getMapSize());
// create random data
WritableRaster data =
com.sun.media.jai.codecimpl.util.RasterFactory.createWritableRaster(
icm.createCompatibleSampleModel(32, 32), new Point(0, 0));
for (int x = data.getMinX(); x < data.getMinX() + data.getWidth(); x++) {
for (int y = data.getMinY(); y < data.getMinY() + data.getHeight(); y++) {
data.setSample(x, y, 0, (x + y) % 8);
}
}
final BufferedImage bi = new BufferedImage(icm, data, false, null);
assertEquals(16, ((IndexColorModel) bi.getColorModel()).getMapSize());
assertEquals(4, bi.getSampleModel().getSampleSize(0));
bi.setData(data);
if (TestData.isInteractiveTest()) {
ImageIOUtilities.visualize(bi, "before");
}
// encode as png
ImageWorker worker = new ImageWorker(bi);
final File outFile = TestData.temp(this, "temp4.png");
worker.writePNG(outFile, "FILTERED", 0.75f, true, false);
worker.dispose();
// make sure we can read it
BufferedImage back = ImageIO.read(outFile);
// we expect an IndexColorMolde one matching the old one
IndexColorModel ccm = (IndexColorModel) back.getColorModel();
assertEquals(3, ccm.getNumColorComponents());
assertEquals(16, ccm.getMapSize());
assertEquals(4, ccm.getPixelSize());
if (TestData.isInteractiveTest()) {
ImageIOUtilities.visualize(back, "after");
}
}
@Test
public void testOpacityIndexed() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
assertFalse(worldDEMImage.getColorModel().hasAlpha());
ImageWorker worker = new ImageWorker(worldDEMImage);
worker.applyOpacity(0.5f);
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof IndexColorModel);
assertTrue(image.getColorModel().hasAlpha());
// check the resulting palette
IndexColorModel index = (IndexColorModel) image.getColorModel();
for (int i = 0; i < index.getMapSize(); i++) {
assertEquals(128, index.getAlpha(i));
}
}
@Test
public void test16BitPNG() throws Exception {
// the resource has been compressed since the palette is way larger than the image itself,
// and the palette does not get compressed
InputStream gzippedStream =
ImageWorkerTest.class.getResource("test-data/sf-sfdem.tif.gz").openStream();
GZIPInputStream is = new GZIPInputStream(gzippedStream);
try {
ImageInputStream iis = ImageIO.createImageInputStream(is);
ImageReader reader = new TIFFImageReaderSpi().createReaderInstance(iis);
reader.setInput(iis);
BufferedImage bi = reader.read(0);
reader.dispose();
iis.close();
IndexColorModel icm = (IndexColorModel) bi.getColorModel();
assertEquals(65536, icm.getMapSize());
final File outFile = TestData.temp(this, "temp.png");
ImageWorker worker = new ImageWorker(bi);
worker.writePNG(outFile, "FILTERED", 0.75f, true, false);
worker.dispose();
// make sure we can read it
BufferedImage back = ImageIO.read(outFile);
// we expect a RGB one
ComponentColorModel ccm = (ComponentColorModel) back.getColorModel();
assertEquals(3, ccm.getNumColorComponents());
// now ask to write paletted
worker = new ImageWorker(bi);
worker.writePNG(outFile, "FILTERED", 0.75f, true, true);
worker.dispose();
// make sure we can read it
back = ImageIO.read(outFile);
// we expect a RGB one
icm = (IndexColorModel) back.getColorModel();
assertEquals(3, icm.getNumColorComponents());
assertTrue(icm.getMapSize() <= 256);
} finally {
is.close();
}
}
@Test
public void testOpacityGrayAlpha() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(gray);
worker.applyOpacity(0.5f);
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
assertTrue(image.getColorModel().hasAlpha());
Raster tile = gray.getTile(0, 0);
Raster outputTile = image.getTile(0, 0);
for (int i = 0; i < tile.getWidth(); i++) {
for (int j = 0; j < tile.getHeight(); j++) {
int original = tile.getSample(i, j, 1);
int result = outputTile.getSample(i, j, 1);
assertEquals(Math.round(original * 0.5), result);
}
}
}
@Test
public void testOpacityIndexedTranslucent() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
assertFalse(worldDEMImage.getColorModel().hasAlpha());
final BufferedImage input = getSyntheticTranslucentIndexed();
ImageWorker worker = new ImageWorker(input);
worker.applyOpacity(0.5f);
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof IndexColorModel);
assertTrue(image.getColorModel().hasAlpha());
// check the resulting palette
IndexColorModel outputCM = (IndexColorModel) image.getColorModel();
IndexColorModel inputCM = (IndexColorModel) input.getColorModel();
for (int i = 0; i < inputCM.getMapSize(); i++) {
assertEquals(Math.round(inputCM.getAlpha(i) * 0.5), outputCM.getAlpha(i));
}
}
@Test
public void testOptimizeAffine() throws Exception {
BufferedImage bi = new BufferedImage(100, 100, BufferedImage.TYPE_3BYTE_BGR);
ImageWorker iw = new ImageWorker(bi);
// apply straight translation
AffineTransform at = AffineTransform.getTranslateInstance(100, 100);
iw.affine(at, null, null);
RenderedImage t1 = iw.getRenderedImage();
assertEquals(100, t1.getMinX());
assertEquals(100, t1.getMinY());
// now go back
AffineTransform atInverse = AffineTransform.getTranslateInstance(-100, -100);
iw.affine(atInverse, null, null);
RenderedImage t2 = iw.getRenderedImage();
assertEquals(0, t2.getMinX());
assertEquals(0, t2.getMinY());
assertSame(bi, t2);
}
/**
* Testing TIFF capabilities.
*
* @throws IOException If an error occured while writting the image.
*/
@Test
public void testTIFFWrite() throws IOException {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// Get the image of the world with transparency.
final ImageWorker worker = new ImageWorker(worldImage);
show(worker, "Input file");
// /////////////////////////////////////////////////////////////////////
// tiff deflated untiled
// /////////////////////////////////////////////////////////////////////
final File outFile = TestData.temp(this, "temp.tiff");
worker.writeTIFF(outFile, "Deflate", 0.75f, -1, -1);
final ImageWorker readWorker = new ImageWorker(ImageIO.read(outFile));
show(readWorker, "Tiff untiled");
// /////////////////////////////////////////////////////////////////////
// tiff deflated compressed tiled
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writeTIFF(outFile, "Deflate", 0.75f, 32, 32);
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "Tiff jpeg compressed, tiled");
outFile.delete();
}
@Test
public void test16BitGIF() throws Exception {
// the resource has been compressed since the palette is way larger than the image itself,
// and the palette does not get compressed
InputStream gzippedStream =
ImageWorkerTest.class.getResource("test-data/sf-sfdem.tif.gz").openStream();
GZIPInputStream is = new GZIPInputStream(gzippedStream);
try {
ImageInputStream iis = ImageIO.createImageInputStream(is);
ImageReader reader = new TIFFImageReaderSpi().createReaderInstance(iis);
reader.setInput(iis);
BufferedImage bi = reader.read(0);
if (TestData.isInteractiveTest()) {
ImageIOUtilities.visualize(bi, "before");
}
reader.dispose();
iis.close();
IndexColorModel icm = (IndexColorModel) bi.getColorModel();
assertEquals(65536, icm.getMapSize());
final File outFile = TestData.temp(this, "temp.gif");
ImageWorker worker = new ImageWorker(bi);
worker.writeGIF(outFile, "LZW", 0.75f);
// Read it back.
bi = ImageIO.read(outFile);
if (TestData.isInteractiveTest()) {
ImageIOUtilities.visualize(bi, "after");
}
ColorModel cm = bi.getColorModel();
assertTrue("wrong color model", cm instanceof IndexColorModel);
assertEquals("wrong transparency model", Transparency.OPAQUE, cm.getTransparency());
final IndexColorModel indexColorModel = (IndexColorModel) cm;
assertEquals("wrong transparent color index", -1, indexColorModel.getTransparentPixel());
assertEquals("wrong component size", 8, indexColorModel.getComponentSize(0));
outFile.delete();
} finally {
is.close();
}
}
/**
* Testing JPEG capabilities.
*
* @throws IOException If an error occured while writting the image.
*/
@Test
public void testJPEGWrite() throws IOException {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// get the image of the world with transparency
final ImageWorker worker = new ImageWorker(getSyntheticRGB(true));
show(worker, "Input JPEG");
// /////////////////////////////////////////////////////////////////////
// nativeJPEG with compression JPEG-LS
// ////////////////////////////////////////////////////////////////////
final File outFile = TestData.temp(this, "temp.jpeg");
ImageWorker readWorker;
if (PackageUtil.isCodecLibAvailable()) {
worker.writeJPEG(outFile, "JPEG-LS", 0.75f, true);
readWorker = new ImageWorker(ImageIO.read(outFile));
show(readWorker, "Native JPEG LS");
} else {
try {
worker.writeJPEG(outFile, "JPEG-LS", 0.75f, true);
assertFalse(true);
} catch (Exception e) {
// TODO: handle exception
}
}
// /////////////////////////////////////////////////////////////////////
// native JPEG compression
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writeJPEG(outFile, "JPEG", 0.75f, true);
readWorker = new ImageWorker(ImageIO.read(outFile));
show(readWorker, "native JPEG");
// /////////////////////////////////////////////////////////////////////
// pure java JPEG compression
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writeJPEG(outFile, "JPEG", 0.75f, false);
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "Pure Java JPEG");
outFile.delete();
}
/** Tests the conversion between RGB and indexed color model. */
@Test
public void testRGB2Palette() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
final ImageWorker worker = new ImageWorker(worldImage);
show(worker, "Input file");
worker.forceIndexColorModelForGIF(true);
// Convert to to index color bitmask
ColorModel cm = worker.getRenderedImage().getColorModel();
assertTrue("wrong color model", cm instanceof IndexColorModel);
assertEquals("wrong transparency model", Transparency.BITMASK, cm.getTransparency());
assertEquals("wrong transparency index", 255, ((IndexColorModel) cm).getTransparentPixel());
show(worker, "Paletted bitmask");
// Go back to rgb.
worker.forceComponentColorModel();
cm = worker.getRenderedImage().getColorModel();
assertTrue("wrong color model", cm instanceof ComponentColorModel);
assertEquals("wrong bands number", 4, cm.getNumComponents());
show(worker, "RGB translucent");
assertEquals("wrong transparency model", Transparency.TRANSLUCENT, cm.getTransparency());
show(worker, "RGB translucent");
}
/**
* Tests capability to write GIF image.
*
* @throws IOException If an error occured while writting the image.
*/
@Test
public void testGIFImageWrite() throws IOException {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// Get the image of the world with transparency.
ImageWorker worker = new ImageWorker(worldDEMImage);
show(worker, "Input GIF");
RenderedImage image = worker.getRenderedImage();
ColorModel cm = image.getColorModel();
assertTrue("wrong color model", cm instanceof IndexColorModel);
assertEquals("wrong transparency model", Transparency.OPAQUE, cm.getTransparency());
// Writes it out as GIF on a file using index color model with
final File outFile = TestData.temp(this, "temp.gif");
worker.writeGIF(outFile, "LZW", 0.75f);
// Read it back
final ImageWorker readWorker = new ImageWorker(ImageIO.read(outFile));
show(readWorker, "GIF to file");
image = readWorker.getRenderedImage();
cm = image.getColorModel();
assertTrue("wrong color model", cm instanceof IndexColorModel);
assertEquals("wrong transparency model", Transparency.OPAQUE, cm.getTransparency());
// Write on an output streams.
final OutputStream os = new FileOutputStream(outFile);
worker = new ImageWorker(worldImage);
worker.forceIndexColorModelForGIF(true);
worker.writeGIF(os, "LZW", 0.75f);
// Read it back.
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "GIF to output stream");
image = readWorker.getRenderedImage();
cm = image.getColorModel();
assertTrue("wrong color model", cm instanceof IndexColorModel);
assertEquals("wrong transparency model", Transparency.BITMASK, cm.getTransparency());
assertEquals(
"wrong transparent color index", 255, ((IndexColorModel) cm).getTransparentPixel());
outFile.delete();
}
@Test
public void testYCbCr() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// check the presence of the PYCC.pf file that contains the profile for the YCbCr color space
if (ImageWorker.CS_PYCC == null) {
System.out.println(
"testYCbCr disabled since we are unable to locate the YCbCr color profile");
return;
}
// RGB component color model
ImageWorker worker = new ImageWorker(getSyntheticRGB(false));
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
assertTrue(!image.getColorModel().hasAlpha());
int sample = image.getTile(0, 0).getSample(0, 0, 2);
assertEquals(0, sample);
assertFalse(worker.isColorSpaceYCbCr());
worker.forceColorSpaceYCbCr();
assertTrue(worker.isColorSpaceYCbCr());
worker.forceColorSpaceRGB();
assertFalse(worker.isColorSpaceYCbCr());
assertTrue(worker.isColorSpaceRGB());
// RGB Palette
worker.forceBitmaskIndexColorModel();
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof IndexColorModel);
assertTrue(!image.getColorModel().hasAlpha());
assertFalse(worker.isColorSpaceYCbCr());
worker.forceColorSpaceYCbCr();
assertTrue(worker.isColorSpaceYCbCr());
worker.forceColorSpaceRGB();
assertFalse(worker.isColorSpaceYCbCr());
assertTrue(worker.isColorSpaceRGB());
// RGB DirectColorModel
worker = new ImageWorker(getSyntheticRGB(true));
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof DirectColorModel);
assertTrue(!image.getColorModel().hasAlpha());
sample = image.getTile(0, 0).getSample(0, 0, 2);
assertEquals(0, sample);
assertFalse(worker.isColorSpaceYCbCr());
worker.forceColorSpaceYCbCr();
assertTrue(worker.isColorSpaceYCbCr());
worker.forceColorSpaceRGB();
assertFalse(worker.isColorSpaceYCbCr());
assertTrue(worker.isColorSpaceRGB());
}
/** Tests the {@link ImageWorker#tile()} methods. Some trivial tests are performed before. */
@Test
public void testReTile() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(worldImage);
assertSame(worldImage, worker.getRenderedImage());
assertEquals(4, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertFalse(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertTrue(worker.isTranslucent());
assertSame("Expected no operation.", worldImage, worker.rescaleToBytes().getRenderedImage());
assertSame(
"Expected no operation.", worldImage, worker.forceComponentColorModel().getRenderedImage());
assertSame(
"Expected no operation.", worldImage, worker.forceColorSpaceRGB().getRenderedImage());
assertSame("Expected no operation.", worldImage, worker.retainBands(4).getRenderedImage());
// Following will change image, so we need to test after the above assertions.
worker.setRenderingHint(
JAI.KEY_IMAGE_LAYOUT,
new ImageLayout()
.setTileGridXOffset(0)
.setTileGridYOffset(0)
.setTileHeight(64)
.setTileWidth(64));
worker.tile();
assertSame("Expected 64.", 64, worker.getRenderedImage().getTileWidth());
assertSame("Expected 64.", 64, worker.getRenderedImage().getTileHeight());
}
/**
* Tests the {@link ImageWorker#makeColorTransparent} methods. Some trivial tests are performed
* before.
*
* @throws IOException
* @throws FileNotFoundException
* @throws IllegalStateException
*/
@Test
public void testMakeColorTransparent()
throws IllegalStateException, FileNotFoundException, IOException {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(sstImage);
assertSame(sstImage, worker.getRenderedImage());
assertEquals(1, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
assertSame(
"Expected no operation.", sstImage, worker.forceIndexColorModel(false).getRenderedImage());
assertSame(
"Expected no operation.", sstImage, worker.forceIndexColorModel(true).getRenderedImage());
assertSame("Expected no operation.", sstImage, worker.forceColorSpaceRGB().getRenderedImage());
assertSame("Expected no operation.", sstImage, worker.retainFirstBand().getRenderedImage());
assertSame("Expected no operation.", sstImage, worker.retainLastBand().getRenderedImage());
// Following will change image, so we need to test after the above assertions.
assertEquals(0, worker.getMinimums()[0], 0);
assertEquals(255, worker.getMaximums()[0], 0);
assertNotSame(sstImage, worker.getRenderedImage());
assertSame(
"Expected same databuffer, i.e. pixels should not be duplicated.",
sstImage.getTile(0, 0).getDataBuffer(),
worker.getRenderedImage().getTile(0, 0).getDataBuffer());
assertSame(worker, worker.makeColorTransparent(Color.WHITE));
assertEquals(255, worker.getTransparentPixel());
assertFalse(worker.isTranslucent());
assertSame(
"Expected same databuffer, i.e. pixels should not be duplicated.",
sstImage.getTile(0, 0).getDataBuffer(),
worker.getRenderedImage().getTile(0, 0).getDataBuffer());
// INDEX TO INDEX-ALPHA
worker = new ImageWorker(chlImage).makeColorTransparent(Color.black);
show(worker, "CHL01195.png");
assertEquals(1, worker.getNumBands());
assertEquals(0, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
RenderedImage image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof IndexColorModel);
IndexColorModel iColorModel = (IndexColorModel) image.getColorModel();
int transparentColor = iColorModel.getRGB(worker.getTransparentPixel()) & 0x00ffffff;
assertTrue(transparentColor == 0);
// INDEX TO INDEX-ALPHA
worker = new ImageWorker(bathy).makeColorTransparent(Color.WHITE);
show(worker, "BATHY.png");
assertEquals(1, worker.getNumBands());
assertEquals(206, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof IndexColorModel);
iColorModel = (IndexColorModel) image.getColorModel();
transparentColor = iColorModel.getRGB(worker.getTransparentPixel()) & 0x00ffffff;
assertTrue(transparentColor == (Color.WHITE.getRGB() & 0x00ffffff));
// RGB TO RGBA
worker = new ImageWorker(smallWorld).makeColorTransparent(new Color(11, 10, 50));
show(worker, "small_world.png");
assertEquals(4, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertTrue(worker.isTranslucent());
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
// RGBA to RGBA
worker = new ImageWorker(worldImage).makeColorTransparent(Color.white);
show(worker, "world.png");
assertEquals(4, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertTrue(worker.isTranslucent());
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
// GRAY TO GRAY-ALPHA
worker = new ImageWorker(gray).makeColorTransparent(Color.black);
show(worker, "gray.png");
assertEquals(2, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isIndexed());
assertFalse(worker.isColorSpaceRGB());
assertTrue(worker.isColorSpaceGRAYScale());
assertTrue(worker.isTranslucent());
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
// GRAY-ALPHA TO GRAY-ALPHA.
worker = new ImageWorker(grayAlpha).makeColorTransparent(Color.black);
show(worker, "gray-alpha.png");
assertEquals(2, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isIndexed());
assertFalse(worker.isColorSpaceRGB());
assertTrue(worker.isColorSpaceGRAYScale());
assertTrue(worker.isTranslucent());
image = worker.getRenderedImage();
assertTrue(image.getColorModel() instanceof ComponentColorModel);
}
/** Tests the {@link #rescaleToBytes()} operation. */
@Test
public void rescaleToBytes() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// set up synthetic images for testing
final RenderedImage test1 =
ConstantDescriptor.create(128.0f, 128.0f, new Double[] {20000.0}, null);
final RenderedImage test2 =
ConstantDescriptor.create(128.0f, 128.0f, new Double[] {255.0}, null);
final RenderedImage test3 = getSynthetic(20000);
final RenderedImage test4 = getSynthetic(255);
// starting to check the results
// single band value exceed the byte upper bound and is constant
final ImageWorker test1I = new ImageWorker(test1).rescaleToBytes();
Assert.assertEquals("Format", test1I.getRenderedOperation().getOperationName());
final double[] maximums1 = test1I.getMaximums();
Assert.assertTrue(maximums1.length == 1);
Assert.assertEquals(255.0, maximums1[0], 1E-10);
final double[] minimums1 = test1I.getMinimums();
Assert.assertTrue(minimums1.length == 1);
Assert.assertEquals(255.0, minimums1[0], 1E-10);
// single band value does not exceed the byte upper bound and is constant
final ImageWorker test2I = new ImageWorker(test2).rescaleToBytes();
Assert.assertEquals("Format", test2I.getRenderedOperation().getOperationName());
final double[] maximums2 = test1I.getMaximums();
Assert.assertTrue(maximums2.length == 1);
Assert.assertEquals(255.0, maximums2[0], 1E-10);
final double[] minimums2 = test1I.getMinimums();
Assert.assertTrue(minimums2.length == 1);
Assert.assertEquals(255.0, minimums2[0], 1E-10);
// single band value exceed the byte upper bound
ImageWorker test3I = new ImageWorker(test3);
final double[] maximums3a = test3I.getMaximums();
final double[] minimums3a = test3I.getMinimums();
test3I.rescaleToBytes();
Assert.assertEquals("Rescale", test3I.getRenderedOperation().getOperationName());
final double[] maximums3b = test3I.getMaximums();
final double[] minimums3b = test3I.getMinimums();
if (maximums3a[0] > 255) {
Assert.assertTrue(Math.abs(maximums3a[0] - maximums3b[0]) > 1E-10);
Assert.assertTrue(Math.abs(255.0 - maximums3b[0]) >= 0);
}
if (minimums3a[0] < 0) {
Assert.assertTrue(minimums3b[0] >= 0);
}
// single band value does not exceed the byte upper bound
ImageWorker test4I = new ImageWorker(test4);
final double[] maximums4a = test4I.getMaximums();
final double[] minimums4a = test4I.getMinimums();
test4I.rescaleToBytes();
Assert.assertEquals("Format", test4I.getRenderedOperation().getOperationName());
final double[] maximums4b = test4I.getMaximums();
final double[] minimums4b = test4I.getMinimums();
Assert.assertEquals(maximums4a[0], maximums4b[0], 1E-10);
Assert.assertEquals(minimums4a[0], minimums4b[0], 1E-10);
// now test multibands case
final RenderedImage multiband = BandMergeDescriptor.create(test2, test3, null);
ImageWorker testmultibandI = new ImageWorker(multiband);
final double[] maximums5a = testmultibandI.getMaximums();
final double[] minimums5a = testmultibandI.getMinimums();
testmultibandI.rescaleToBytes();
final double[] maximums5b = testmultibandI.getMaximums();
final double[] minimums5b = testmultibandI.getMinimums();
Assert.assertEquals(maximums5a[0], maximums5b[0], 1E-10);
Assert.assertEquals(minimums5a[0], minimums5b[0], 1E-10);
Assert.assertTrue(Math.abs(maximums5a[1] - maximums5b[1]) > 1E-10);
Assert.assertTrue(Math.abs(minimums5a[1] - minimums5b[1]) > 1E-10);
}
/**
* Testing PNG capabilities.
*
* @throws IOException If an error occured while writting the image.
*/
@Test
public void testPNGWrite() throws IOException {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
// Get the image of the world with transparency.
final ImageWorker worker = new ImageWorker(worldImage);
show(worker, "Input file");
// /////////////////////////////////////////////////////////////////////
// native png filtered compression 24 bits
// /////////////////////////////////////////////////////////////////////
final File outFile = TestData.temp(this, "temp.png");
worker.writePNG(outFile, "FILTERED", 0.75f, true, false);
final ImageWorker readWorker = new ImageWorker(ImageIO.read(outFile));
show(readWorker, "Native PNG24");
// /////////////////////////////////////////////////////////////////////
// native png filtered compression 8 bits
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writePNG(outFile, "FILTERED", 0.75f, true, true);
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "native PNG8");
// /////////////////////////////////////////////////////////////////////
// pure java png 24
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writePNG(outFile, "FILTERED", 0.75f, false, false);
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "Pure PNG24");
// /////////////////////////////////////////////////////////////////////
// pure java png 8
// /////////////////////////////////////////////////////////////////////
worker.setImage(worldImage);
worker.writePNG(outFile, "FILTERED", 0.75f, false, true);
readWorker.setImage(ImageIO.read(outFile));
show(readWorker, "Pure PNG8");
outFile.delete();
// Check we are not expanding to RGB a paletted image
worker.setImage(sstImage);
assertTrue(sstImage.getColorModel() instanceof IndexColorModel);
worker.writePNG(outFile, "FILTERED", 0.75f, false, false);
readWorker.setImage(ImageIO.read(outFile));
assertTrue(readWorker.getRenderedImage().getColorModel() instanceof IndexColorModel);
}
@Test
public void testBitmask() {
assertTrue("Assertions should be enabled.", ImageWorker.class.desiredAssertionStatus());
ImageWorker worker = new ImageWorker(sstImage);
worker.forceBitmaskIndexColorModel();
assertEquals(1, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
final BufferedImage directRGB = getSyntheticRGB(true);
worker = new ImageWorker(directRGB);
worker.forceBitmaskIndexColorModel();
assertEquals(1, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
final BufferedImage componentRGB = getSyntheticRGB(false);
worker = new ImageWorker(componentRGB);
worker.forceBitmaskIndexColorModel();
assertEquals(1, worker.getNumBands());
assertEquals(-1, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isColorSpaceGRAYScale());
assertFalse(worker.isTranslucent());
final BufferedImage translucentIndexed = getSyntheticTranslucentIndexed();
worker = new ImageWorker(translucentIndexed);
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertTrue(worker.isTranslucent());
worker.forceIndexColorModelForGIF(true);
assertEquals(1, worker.getNumBands());
assertEquals(0, worker.getTransparentPixel());
assertTrue(worker.isBytes());
assertFalse(worker.isBinary());
assertTrue(worker.isIndexed());
assertTrue(worker.isColorSpaceRGB());
assertFalse(worker.isTranslucent());
}