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src/java.desktop/share/classes/java/awt/image/IndexColorModel.java

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*** 26,35 **** --- 26,37 ---- package java.awt.image; import java.awt.Transparency; import java.awt.color.ColorSpace; import java.math.BigInteger; + import java.util.Arrays; + import java.util.Objects; /** * The {@code IndexColorModel} class is a {@code ColorModel} * class that works with pixel values consisting of a * single sample that is an index into a fixed colormap in the default
*** 1530,1535 **** --- 1532,1610 ---- + " transIndex = "+transparent_index + " has alpha = "+supportsAlpha + " isAlphaPre = "+isAlphaPremultiplied ); } + + /** + * Tests if the specified {@code Object} equals this + * {@code IndexColorModel}. + * In order to protect the symmetry property of + * {@code (a.equals(b) == b.equals(a))}, + * the target object must be the exact same class as this + * object to evaluate as {equals}. + * @param obj the {@code Object} to test for equality + * @return {@code true} if the specified {@code Object} + * equals this {@code IndexColorModel}; {@code false} otherwise. + */ + @Override + public boolean equals(Object obj) { + /* + * We verify the type of argument obj in super.equals() where we check + * for equality of class name. + */ + if (!super.equals(obj)) { + return false; + } + + IndexColorModel cm = (IndexColorModel) obj; + if (map_size != cm.map_size || + transparent_index != cm.transparent_index) + { + return false; + } + + // verify whether we have to check equality of all bits in validBits + boolean testValidBits; + if (validBits == cm.validBits) { + testValidBits = false; + } else if (validBits == null || cm.validBits == null) { + return false; + } else if (validBits.equals(cm.validBits)) { + testValidBits = false; + } else { + testValidBits = true; + } + + if (testValidBits) { + for (int i = 0; i < map_size; i++) { + if (rgb[i] != cm.rgb[i] || + validBits.testBit(i) != cm.validBits.testBit(i)) + { + return false; + } + } + } else { + for (int i = 0; i < map_size; i++) { + if (rgb[i] != cm.rgb[i]) { + return false; + } + } + } + return true; + } + + /** + * Returns the hash code for IndexColorModel. + * + * @return a hash code for IndexColorModel + */ + @Override + public int hashCode() { + int hash = super.hashCode(); + hash = 43 * hash + Arrays.hashCode(this.rgb); + hash = 43 * hash + this.map_size; + hash = 43 * hash + this.transparent_index; + hash = 43 * hash + Objects.hashCode(this.validBits); + return hash; + } }
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