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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/color/ICC_ProfileGray.java | |
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Diffstat (limited to 'libjava/classpath/java/awt/color/ICC_ProfileGray.java')
-rw-r--r-- | libjava/classpath/java/awt/color/ICC_ProfileGray.java | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/color/ICC_ProfileGray.java b/libjava/classpath/java/awt/color/ICC_ProfileGray.java new file mode 100644 index 000000000..f85533cec --- /dev/null +++ b/libjava/classpath/java/awt/color/ICC_ProfileGray.java @@ -0,0 +1,133 @@ +/* ICC_ProfileGray.java -- the ICC profile for a Gray colorspace + Copyright (C) 2002, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.awt.color; + +/** + * ICC_ProfileGray - a special case of ICC_Profiles. + * + * The ICC_Profile.getInstance() method will return an instance of the + * ICC_ProfileGray subclass when all the following conditions are met: + * The device color space of the profile is TYPE_GRAY. + * The profile contains a gray TRCTag. + * The profile contains a mediaWhitePointTag. + * + * As per the ICC specification, the color space conversion can then + * be done through the following method: + * linearGray = grayTRC[deviceGray] + * + * Note that if the profile contains a CLUT for the color space conversion, + * it should be used instead, and the TRC information ignored. + * + * @author Sven de Marothy + * @since 1.2 + */ +public class ICC_ProfileGray extends ICC_Profile +{ + /** + * Compatible with JDK 1.2+. + */ + private static final long serialVersionUID = -1124721290732002649L; + private transient float[] whitePoint; + + /** + * Package-private constructor used by ICC_ColorSpace for creating an + * ICC_ProfileGray from a predefined ColorSpace (CS_GRAY) + */ + ICC_ProfileGray(int cspace) + { + super(cspace); + whitePoint = getXYZData(icSigMediaWhitePointTag); + } + + /** + * Package-private constructor used by ICC_ColorSpace for creating an + * ICC_ProfileGray from profile data. + */ + ICC_ProfileGray(byte[] data) + { + super(data); + whitePoint = getXYZData(icSigMediaWhitePointTag); + } + + + /** + * Returns the media white point of the profile. + */ + public float[] getMediaWhitePoint() + { + float[] wp = new float[3]; + wp[0] = whitePoint[0]; + wp[1] = whitePoint[1]; + wp[2] = whitePoint[2]; + return wp; + } + + /** + * Returns the TRC gamma value. + * @throws ProfileDataException if the TRC is described by a lookup + * table and not a gamma value. + */ + public float getGamma() + { + short[] data = getCurve(icSigGrayTRCTag); + if (data == null) + throw new IllegalArgumentException("Couldn't read Gray TRC data."); + if (data.length != 1) + throw new ProfileDataException("TRC is a table, not a gamma value."); + + // convert the unsigned 7.8 fixed-point gamma to a float. + double gamma = (double) (data[0] & (0xFFFF)) / 256.0; + return (float) gamma; + } + + /** + * Returns the TRC lookup table. + * @throws ProfileDataException if the TRC is described by a gamma value + * and not a lookup table. + */ + public short[] getTRC() + { + short[] data = getCurve(icSigGrayTRCTag); + if (data == null) + throw new IllegalArgumentException("Couldn't read Gray TRC data."); + if (data.length <= 1) + throw new ProfileDataException("Gamma value, not a TRC table."); + return data; + } +} // class ICC_ProfileGray |