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ImageReader subsampling test

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This commit is contained in:
Harald Kuhr
2013-10-24 21:19:52 +02:00
parent d7958fc8a7
commit 86921ad389
3 changed files with 89 additions and 46 deletions
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89
imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
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@@ -28,6 +28,7 @@
package com.twelvemonkeys.imageio.util;
import com.twelvemonkeys.image.ImageUtil;
import com.twelvemonkeys.imageio.stream.URLImageInputStreamSpi;
import org.junit.Ignore;
import org.junit.Test;
@@ -45,9 +46,7 @@ import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
@@ -75,29 +74,6 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
protected abstract List<TestData> getTestData();
/**
* Convenience method to get a list of test files from the classpath.
* Currently only works for resources on the filesystem (not in jars or
* archives).
*
* @param pResourceInFolder a resource in the correct classpath folder.
* @return a list of files
*/
protected final List<File> getInputsFromClasspath(final String pResourceInFolder) {
URL resource = getClass().getClassLoader().getResource(pResourceInFolder);
assertNotNull(resource);
File dir;
try {
dir = new File(resource.toURI()).getParentFile();
}
catch (URISyntaxException e) {
throw new RuntimeException(e);
}
List<File> files = Arrays.asList(dir.listFiles());
assertFalse(files.isEmpty());
return files;
}
protected abstract ImageReaderSpi createProvider();
protected abstract Class<T> getReaderClass();
@@ -476,7 +452,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
}
@Test
public void testReadWithSubsampleParam() {
public void testReadWithSubsampleParamDimensions() {
ImageReader reader = createReader();
TestData data = getTestData().get(0);
reader.setInput(data.getInputStream());
@@ -493,8 +469,61 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
}
assertNotNull("Image was null!", image);
assertEquals("Read image has wrong width: ", (double) data.getDimension(0).width / 5.0, image.getWidth(), 1.0);
assertEquals("Read image has wrong height: ", (double) data.getDimension(0).height / 5.0, image.getHeight(), 1.0);
assertEquals("Read image has wrong width: ", (data.getDimension(0).width + 4) / 5, image.getWidth());
assertEquals("Read image has wrong height: ", (data.getDimension(0).height + 4) / 5, image.getHeight());
}
@Ignore
@Test
public void testReadWithSubsampleParamPixels() throws IOException {
ImageReader reader = createReader();
TestData data = getTestData().get(0);
reader.setInput(data.getInputStream());
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(Math.min(100, reader.getWidth(0)), Math.min(100, reader.getHeight(0))));
BufferedImage image = null;
BufferedImage subsampled = null;
try {
image = reader.read(0, param);
param.setSourceSubsampling(2, 2, 1, 1); // Hmm.. Seems to be the offset the fake version (ReplicateScaleFilter) uses
subsampled = reader.read(0, param);
}
catch (IOException e) {
failBecause("Image could not be read", e);
}
BufferedImage expected = ImageUtil.toBuffered(IIOUtil.fakeSubsampling(image, param));
// JPanel panel = new JPanel();
// panel.add(new JLabel("Expected", new BufferedImageIcon(expected, 300, 300), JLabel.CENTER));
// panel.add(new JLabel("Actual", new BufferedImageIcon(subsampled, 300, 300), JLabel.CENTER));
// JOptionPane.showConfirmDialog(null, panel);
assertImageDataEquals("Subsampled image data does not match expected", expected, subsampled);
}
protected final void assertImageDataEquals(String message, BufferedImage expected, BufferedImage actual) {
assertNotNull("Expected image was null", expected);
assertNotNull("Actual image was null!", actual);
if (expected == actual) {
return;
}
for (int y = 0; y < expected.getHeight(); y++) {
for (int x = 0; x < expected.getWidth(); x++) {
int expectedRGB = expected.getRGB(x, y);
int actualRGB = actual.getRGB(x, y);
assertEquals(String.format("%s alpha at (%d, %d)", message, x, y), (expectedRGB >> 24) & 0xff, (actualRGB >> 24) & 0xff, 5);
assertEquals(String.format("%s red at (%d, %d)", message, x, y), (expectedRGB >> 16) & 0xff, (actualRGB >> 16) & 0xff, 5);
assertEquals(String.format("%s green at (%d, %d)", message, x, y), (expectedRGB >> 8) & 0xff, (actualRGB >> 8) & 0xff, 5);
assertEquals(String.format("%s blue at (%d, %d)", message, x, y), expectedRGB & 0xff, actualRGB & 0xff, 5);
}
}
}
@Test
@@ -513,6 +542,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
catch (IOException e) {
failBecause("Image could not be read", e);
}
assertNotNull("Image was null!", image);
assertEquals("Read image has wrong width: " + image.getWidth(), 10, image.getWidth());
assertEquals("Read image has wrong height: " + image.getHeight(), 10, image.getHeight());
@@ -540,6 +570,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
catch (IOException e) {
failBecause("Image could not be read", e);
}
assertNotNull("Image was null!", image);
assertEquals("Read image has wrong width: " + image.getWidth(), 10, image.getWidth());
assertEquals("Read image has wrong height: " + image.getHeight(), 10, image.getHeight());
@@ -1352,7 +1383,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
boolean removed = illegalTypes.remove(valid);
// TODO: 4BYTE_ABGR (6) and 4BYTE_ABGR_PRE (7) is essentially the same type...
// !#$#<23>%$! ImageTypeSpecifier.equals is not well-defined
// #$@*%$! ImageTypeSpecifier.equals is not well-defined
if (!removed) {
for (Iterator<ImageTypeSpecifier> iterator = illegalTypes.iterator(); iterator.hasNext();) {
ImageTypeSpecifier illegalType = iterator.next();