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DiscreteAlphaIndexColorModel num components fix

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Harald Kuhr
2022-08-19 16:38:45 +02:00
parent d1872ce94f
commit 190fe87ee9
2 changed files with 42 additions and 21 deletions
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23
imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/color/DiscreteAlphaIndexColorModelTest.java
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@@ -37,7 +37,9 @@ import java.awt.image.*;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
public class DiscreteAlphaIndexColorModelTest {
@@ -204,6 +206,25 @@ public class DiscreteAlphaIndexColorModelTest {
assertThat(raster.getTransferType(), CoreMatchers.equalTo(DataBuffer.TYPE_BYTE));
}
@Test
public void testNumComponents() {
int[] colors = createIntLut(1 << 8);
IndexColorModel icm = new IndexColorModel(8, colors.length, colors, 0, false, -1, DataBuffer.TYPE_BYTE);
ColorModel colorModelDiscreteAlpha = new DiscreteAlphaIndexColorModel(icm, 1, true);
ColorModel colorModelDiscreteAlphaExtra = new DiscreteAlphaIndexColorModel(icm, 2, true);
ColorModel colorModelNoAlphaExtra = new DiscreteAlphaIndexColorModel(icm, 42, false);
assertEquals(3, colorModelDiscreteAlpha.getNumColorComponents());
assertEquals(4, colorModelDiscreteAlpha.getNumComponents());
assertEquals(3, colorModelDiscreteAlphaExtra.getNumColorComponents());
assertEquals(5, colorModelDiscreteAlphaExtra.getNumComponents()); // Questionable
assertEquals(3, colorModelNoAlphaExtra.getNumColorComponents());
assertEquals(45, colorModelNoAlphaExtra.getNumComponents()); // Questionable
}
private static int[] createIntLut(final int count) {
int[] lut = new int[count];