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Diffstat (limited to 'openjdk/gnu/java/awt/color/ToneReproductionCurve.java')
-rw-r--r--openjdk/gnu/java/awt/color/ToneReproductionCurve.java177
1 files changed, 0 insertions, 177 deletions
diff --git a/openjdk/gnu/java/awt/color/ToneReproductionCurve.java b/openjdk/gnu/java/awt/color/ToneReproductionCurve.java
deleted file mode 100644
index 208e1688..00000000
--- a/openjdk/gnu/java/awt/color/ToneReproductionCurve.java
+++ /dev/null
@@ -1,177 +0,0 @@
-/* ToneReproductionCurve.java -- Representation of an ICC 'curv' type TRC
- Copyright (C) 2004 Free Software Foundation
-
-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 gnu.java.awt.color;
-
-
-/**
- * ToneReproductionCurve - TRCs are used to describe RGB
- * and Grayscale profiles. The TRC is essentially the gamma
- * function of the color space.
- *
- * For example, Apple RGB has a gamma of 1.8, most monitors are ~2.2,
- * sRGB is 2.4 with a small linear part near 0.
- * Linear spaces are of course 1.0.
- * (The exact function is implemented in SrgbConverter)
- *
- * The ICC specification allows the TRC to be described as a single
- * Gamma value, where the function is thus out = in**gamma.
- * Alternatively, the gamma function may be represented by a lookup table
- * of values, in which case linear interpolation is used.
- *
- * @author Sven de Marothy
- */
-public class ToneReproductionCurve
-{
- private float[] trc;
- private float gamma;
- private float[] reverseTrc;
-
- /**
- * Constructs a TRC from a gamma values
- */
- public ToneReproductionCurve(float gamma)
- {
- trc = null;
- reverseTrc = null;
- this.gamma = gamma;
- }
-
- /**
- * Constructs a TRC from a set of float values
- */
- public ToneReproductionCurve(float[] trcValues)
- {
- trc = new float[trcValues.length];
- System.arraycopy(trcValues, 0, trc, 0, trcValues.length);
- setupReverseTrc();
- }
-
- /**
- * Constructs a TRC from a set of short values normalized to
- * the 0-65535 range (as in the ICC profile file).
- * (Note the values are treated as unsigned)
- */
- public ToneReproductionCurve(short[] trcValues)
- {
- trc = new float[trcValues.length];
- for (int i = 0; i < trcValues.length; i++)
- trc[i] = (float) ((int) trcValues[i] & (0xFFFF)) / 65535.0f;
- setupReverseTrc();
- }
-
- /**
- * Performs a TRC lookup
- */
- public float lookup(float in)
- {
- float out;
-
- if (trc == null)
- {
- if (in == 0f)
- return 0.0f;
- return (float) Math.exp(gamma * Math.log(in));
- }
- else
- {
- double alpha = in * (trc.length - 1);
- int index = (int) Math.floor(alpha);
- alpha = alpha - (double) index;
- if (index >= trc.length - 1)
- return trc[trc.length - 1];
- if (index <= 0)
- return trc[0];
- out = (float) (trc[index] * (1.0 - alpha) + trc[index + 1] * alpha);
- }
- return out;
- }
-
- /**
- * Performs an reverse lookup
- */
- public float reverseLookup(float in)
- {
- float out;
-
- if (trc == null)
- {
- if (in == 0f)
- return 0.0f;
- return (float) Math.exp((1.0 / gamma) * Math.log(in));
- }
- else
- {
- double alpha = in * (reverseTrc.length - 1);
- int index = (int) Math.floor(alpha);
- alpha = alpha - (double) index;
- if (index >= reverseTrc.length - 1)
- return reverseTrc[reverseTrc.length - 1];
- if (index <= 0)
- return reverseTrc[0];
- out = (float) (reverseTrc[index] * (1.0 - alpha)
- + reverseTrc[index + 1] * alpha);
- }
- return out;
- }
-
- /**
- * Calculates a reverse-lookup table.
- * We use a whopping 10,000 entries.. This is should be more than any
- * real-life TRC table (typically around 256-1024) so we won't be losing
- * any precision.
- *
- * This will of course generate completely invalid results if the curve
- * is not monotonic and invertable. But what's the alternative?
- */
- public void setupReverseTrc()
- {
- reverseTrc = new float[10000];
- int j = 0;
- for (int i = 0; i < 10000; i++)
- {
- float n = ((float) i) / 10000f;
- while (trc[j + 1] < n && j < trc.length - 2)
- j++;
-
- if (j == trc.length - 2)
- reverseTrc[i] = trc[trc.length - 1];
- else
- reverseTrc[i] = (j + (n - trc[j]) / (trc[j + 1] - trc[j])) / ((float) trc.length);
- }
- }
-}