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/*
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* Copyright (c) 1995, 2001, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.awt.image;
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import java.awt.color.ColorSpace;
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import java.awt.Transparency;
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/**
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* The <code>DirectColorModel</code> class is a <code>ColorModel</code>
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* class that works with pixel values that represent RGB
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* color and alpha information as separate samples and that pack all
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* samples for a single pixel into a single int, short, or byte quantity.
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* This class can be used only with ColorSpaces of type ColorSpace.TYPE_RGB.
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* In addition, for each component of the ColorSpace, the minimum
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* normalized component value obtained via the <code>getMinValue()</code>
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* method of ColorSpace must be 0.0, and the maximum value obtained via
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* the <code>getMaxValue()</code> method must be 1.0 (these min/max
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* values are typical for RGB spaces).
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* There must be three color samples in the pixel values and there can
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* be a single alpha sample. For those methods that use a primitive array
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* pixel representation of type <code>transferType</code>, the array
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* length is always one. The transfer
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* types supported are DataBuffer.TYPE_BYTE,
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* DataBuffer.TYPE_USHORT, and DataBuffer.TYPE_INT.
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* Color and alpha samples are stored in the single
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* element of the array in bits indicated by bit masks. Each bit mask
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* must be contiguous and masks must not overlap. The same masks apply to
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* the single int pixel representation used by other methods. The
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* correspondence of masks and color/alpha samples is as follows:
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* <ul>
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* <li> Masks are identified by indices running from 0 through 2
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* if no alpha is present, or 3 if an alpha is present.
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* <li> The first three indices refer to color samples;
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* index 0 corresponds to red, index 1 to green, and index 2 to blue.
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* <li> Index 3 corresponds to the alpha sample, if present.
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* </ul>
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* <p>
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* The translation from pixel values to color/alpha components for
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* display or processing purposes is a one-to-one correspondence of
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* samples to components. A <code>DirectColorModel</code> is
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* typically used with image data which uses masks to define packed
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* samples. For example, a <code>DirectColorModel</code> can be used in
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* conjunction with a <code>SinglePixelPackedSampleModel</code> to
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* construct a {@link BufferedImage}. Normally the masks used by the
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* {@link SampleModel} and the <code>ColorModel</code> would be the
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* same. However, if they are different, the color interpretation
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* of pixel data will be done according to the masks of the
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* <code>ColorModel</code>.
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* <p>
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* A single int pixel representation is valid for all objects of this
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* class, since it is always possible to represent pixel values used with
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* this class in a single int. Therefore, methods which use this
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* representation will not throw an <code>IllegalArgumentException</code>
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* due to an invalid pixel value.
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* <p>
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* This color model is similar to an X11 TrueColor visual.
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* The default RGB ColorModel specified by the
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* {@link ColorModel#getRGBdefault() getRGBdefault} method is a
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* <code>DirectColorModel</code> with the following parameters:
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* <pre>
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* Number of bits: 32
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* Red mask: 0x00ff0000
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* Green mask: 0x0000ff00
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* Blue mask: 0x000000ff
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* Alpha mask: 0xff000000
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* Color space: sRGB
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* isAlphaPremultiplied: False
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* Transparency: Transparency.TRANSLUCENT
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* transferType: DataBuffer.TYPE_INT
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* </pre>
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* <p>
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* Many of the methods in this class are final. This is because the
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* underlying native graphics code makes assumptions about the layout
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* and operation of this class and those assumptions are reflected in
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* the implementations of the methods here that are marked final. You
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* can subclass this class for other reasons, but you cannot override
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* or modify the behavior of those methods.
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*
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* @see ColorModel
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* @see ColorSpace
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* @see SinglePixelPackedSampleModel
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* @see BufferedImage
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* @see ColorModel#getRGBdefault
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*
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*/
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public class DirectColorModel extends PackedColorModel {
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private int red_mask;
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private int green_mask;
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private int blue_mask;
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private int alpha_mask;
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private int red_offset;
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private int green_offset;
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private int blue_offset;
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private int alpha_offset;
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private int red_scale;
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private int green_scale;
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private int blue_scale;
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private int alpha_scale;
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private boolean is_LinearRGB;
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private int lRGBprecision;
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private byte[] tosRGB8LUT;
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private byte[] fromsRGB8LUT8;
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private short[] fromsRGB8LUT16;
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/**
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* Constructs a <code>DirectColorModel</code> from the specified masks
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* that indicate which bits in an <code>int</code> pixel representation
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* contain the red, green and blue color samples. As pixel values do not
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* contain alpha information, all pixels are treated as opaque, which
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* means that alpha = 1.0. All of the bits
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* in each mask must be contiguous and fit in the specified number
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* of least significant bits of an <code>int</code> pixel representation.
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* The <code>ColorSpace</code> is the default sRGB space. The
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* transparency value is Transparency.OPAQUE. The transfer type
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* is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
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* or DataBuffer.TYPE_INT that can hold a single pixel.
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* @param bits the number of bits in the pixel values; for example,
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* the sum of the number of bits in the masks.
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* @param rmask specifies a mask indicating which bits in an
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* integer pixel contain the red component
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* @param gmask specifies a mask indicating which bits in an
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* integer pixel contain the green component
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* @param bmask specifies a mask indicating which bits in an
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* integer pixel contain the blue component
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*
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*/
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public DirectColorModel(int bits,
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int rmask, int gmask, int bmask) {
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this(bits, rmask, gmask, bmask, 0);
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}
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/**
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* Constructs a <code>DirectColorModel</code> from the specified masks
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* that indicate which bits in an <code>int</code> pixel representation
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* contain the red, green and blue color samples and the alpha sample,
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* if present. If <code>amask</code> is 0, pixel values do not contain
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* alpha information and all pixels are treated as opaque, which means
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* that alpha = 1.0. All of the bits in each mask must
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* be contiguous and fit in the specified number of least significant bits
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* of an <code>int</code> pixel representation. Alpha, if present, is not
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* premultiplied. The <code>ColorSpace</code> is the default sRGB space.
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* The transparency value is Transparency.OPAQUE if no alpha is
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* present, or Transparency.TRANSLUCENT otherwise. The transfer type
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* is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
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* or DataBuffer.TYPE_INT that can hold a single pixel.
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* @param bits the number of bits in the pixel values; for example,
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* the sum of the number of bits in the masks.
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* @param rmask specifies a mask indicating which bits in an
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* integer pixel contain the red component
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* @param gmask specifies a mask indicating which bits in an
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* integer pixel contain the green component
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* @param bmask specifies a mask indicating which bits in an
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* integer pixel contain the blue component
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* @param amask specifies a mask indicating which bits in an
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* integer pixel contain the alpha component
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*/
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public DirectColorModel(int bits, int rmask, int gmask,
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int bmask, int amask) {
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super (ColorSpace.getInstance(ColorSpace.CS_sRGB),
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bits, rmask, gmask, bmask, amask, false,
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amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
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ColorModel.getDefaultTransferType(bits));
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setFields();
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}
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/**
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* Constructs a <code>DirectColorModel</code> from the specified
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* parameters. Color components are in the specified
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* <code>ColorSpace</code>, which must be of type ColorSpace.TYPE_RGB
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* and have minimum normalized component values which are all 0.0
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* and maximum values which are all 1.0.
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* The masks specify which bits in an <code>int</code> pixel
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* representation contain the red, green and blue color samples and
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* the alpha sample, if present. If <code>amask</code> is 0, pixel
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* values do not contain alpha information and all pixels are treated
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* as opaque, which means that alpha = 1.0. All of the
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* bits in each mask must be contiguous and fit in the specified number
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* of least significant bits of an <code>int</code> pixel
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* representation. If there is alpha, the <code>boolean</code>
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* <code>isAlphaPremultiplied</code> specifies how to interpret
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* color and alpha samples in pixel values. If the <code>boolean</code>
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* is <code>true</code>, color samples are assumed to have been
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* multiplied by the alpha sample. The transparency value is
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* Transparency.OPAQUE, if no alpha is present, or
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* Transparency.TRANSLUCENT otherwise. The transfer type
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* is the type of primitive array used to represent pixel values and
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* must be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or
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* DataBuffer.TYPE_INT.
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* @param space the specified <code>ColorSpace</code>
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* @param bits the number of bits in the pixel values; for example,
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* the sum of the number of bits in the masks.
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* @param rmask specifies a mask indicating which bits in an
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* integer pixel contain the red component
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* @param gmask specifies a mask indicating which bits in an
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* integer pixel contain the green component
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* @param bmask specifies a mask indicating which bits in an
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* integer pixel contain the blue component
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* @param amask specifies a mask indicating which bits in an
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* integer pixel contain the alpha component
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* @param isAlphaPremultiplied <code>true</code> if color samples are
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* premultiplied by the alpha sample; <code>false</code> otherwise
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* @param transferType the type of array used to represent pixel values
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* @throws IllegalArgumentException if <code>space</code> is not a
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* TYPE_RGB space or if the min/max normalized component
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* values are not 0.0/1.0.
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*/
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public DirectColorModel(ColorSpace space, int bits, int rmask,
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int gmask, int bmask, int amask,
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boolean isAlphaPremultiplied,
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int transferType) {
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super (space, bits, rmask, gmask, bmask, amask,
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isAlphaPremultiplied,
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amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
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transferType);
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if (ColorModel.isLinearRGBspace(colorSpace)) {
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is_LinearRGB = true;
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if (maxBits <= 8) {
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lRGBprecision = 8;
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tosRGB8LUT = ColorModel.getLinearRGB8TosRGB8LUT();
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fromsRGB8LUT8 = ColorModel.getsRGB8ToLinearRGB8LUT();
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} else {
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lRGBprecision = 16;
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tosRGB8LUT = ColorModel.getLinearRGB16TosRGB8LUT();
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fromsRGB8LUT16 = ColorModel.getsRGB8ToLinearRGB16LUT();
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}
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} else if (!is_sRGB) {
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for (int i = 0; i < 3; i++) {
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// super constructor checks that space is TYPE_RGB
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// check here that min/max are all 0.0/1.0
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if ((space.getMinValue(i) != 0.0f) ||
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(space.getMaxValue(i) != 1.0f)) {
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throw new IllegalArgumentException(
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"Illegal min/max RGB component value");
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}
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}
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}
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setFields();
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}
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/**
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* Returns the mask indicating which bits in an <code>int</code> pixel
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* representation contain the red color component.
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* @return the mask, which indicates which bits of the <code>int</code>
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* pixel representation contain the red color sample.
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*/
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final public int getRedMask() {
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return maskArray[0];
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}
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/**
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* Returns the mask indicating which bits in an <code>int</code> pixel
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* representation contain the green color component.
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* @return the mask, which indicates which bits of the <code>int</code>
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* pixel representation contain the green color sample.
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*/
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final public int getGreenMask() {
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return maskArray[1];
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}
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/**
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* Returns the mask indicating which bits in an <code>int</code> pixel
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* representation contain the blue color component.
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* @return the mask, which indicates which bits of the <code>int</code>
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* pixel representation contain the blue color sample.
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*/
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final public int getBlueMask() {
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return maskArray[2];
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}
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/**
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* Returns the mask indicating which bits in an <code>int</code> pixel
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* representation contain the alpha component.
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* @return the mask, which indicates which bits of the <code>int</code>
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* pixel representation contain the alpha sample.
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*/
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final public int getAlphaMask() {
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if (supportsAlpha) {
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return maskArray[3];
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} else {
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return 0;
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}
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}
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/*
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* Given an int pixel in this ColorModel's ColorSpace, converts
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* it to the default sRGB ColorSpace and returns the R, G, and B
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* components as float values between 0.0 and 1.0.
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*/
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private float[] getDefaultRGBComponents(int pixel) {
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int components[] = getComponents(pixel, null, 0);
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float norm[] = getNormalizedComponents(components, 0, null, 0);
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// Note that getNormalizedComponents returns non-premultiplied values
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return colorSpace.toRGB(norm);
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}
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private int getsRGBComponentFromsRGB(int pixel, int idx) {
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int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
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if (isAlphaPremultiplied) {
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int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
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c = (a == 0) ? 0 :
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(int) (((c * scaleFactors[idx]) * 255.0f /
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(a * scaleFactors[3])) + 0.5f);
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} else if (scaleFactors[idx] != 1.0f) {
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c = (int) ((c * scaleFactors[idx]) + 0.5f);
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}
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return c;
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}
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private int getsRGBComponentFromLinearRGB(int pixel, int idx) {
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int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
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if (isAlphaPremultiplied) {
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float factor = (float) ((1 << lRGBprecision) - 1);
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int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
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c = (a == 0) ? 0 :
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(int) (((c * scaleFactors[idx]) * factor /
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(a * scaleFactors[3])) + 0.5f);
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} else if (nBits[idx] != lRGBprecision) {
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if (lRGBprecision == 16) {
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c = (int) ((c * scaleFactors[idx] * 257.0f) + 0.5f);
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} else {
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c = (int) ((c * scaleFactors[idx]) + 0.5f);
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}
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}
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// now range of c is 0-255 or 0-65535, depending on lRGBprecision
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return tosRGB8LUT[c] & 0xff;
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}
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/**
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* Returns the red color component for the specified pixel, scaled
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* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
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* color conversion is done if necessary. The pixel value is specified
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* as an <code>int</code>.
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* The returned value is a non pre-multiplied value. Thus, if the
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* alpha is premultiplied, this method divides it out before returning
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* the value. If the alpha value is 0, for example, the red value
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* is 0.
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* @param pixel the specified pixel
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* @return the red color component for the specified pixel, from
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* 0 to 255 in the sRGB <code>ColorSpace</code>.
|
|
367 |
*/
|
|
368 |
final public int getRed(int pixel) {
|
|
369 |
if (is_sRGB) {
|
|
370 |
return getsRGBComponentFromsRGB(pixel, 0);
|
|
371 |
} else if (is_LinearRGB) {
|
|
372 |
return getsRGBComponentFromLinearRGB(pixel, 0);
|
|
373 |
}
|
|
374 |
float rgb[] = getDefaultRGBComponents(pixel);
|
|
375 |
return (int) (rgb[0] * 255.0f + 0.5f);
|
|
376 |
}
|
|
377 |
|
|
378 |
/**
|
|
379 |
* Returns the green color component for the specified pixel, scaled
|
|
380 |
* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
|
|
381 |
* color conversion is done if necessary. The pixel value is specified
|
|
382 |
* as an <code>int</code>.
|
|
383 |
* The returned value is a non pre-multiplied value. Thus, if the
|
|
384 |
* alpha is premultiplied, this method divides it out before returning
|
|
385 |
* the value. If the alpha value is 0, for example, the green value
|
|
386 |
* is 0.
|
|
387 |
* @param pixel the specified pixel
|
|
388 |
* @return the green color component for the specified pixel, from
|
|
389 |
* 0 to 255 in the sRGB <code>ColorSpace</code>.
|
|
390 |
*/
|
|
391 |
final public int getGreen(int pixel) {
|
|
392 |
if (is_sRGB) {
|
|
393 |
return getsRGBComponentFromsRGB(pixel, 1);
|
|
394 |
} else if (is_LinearRGB) {
|
|
395 |
return getsRGBComponentFromLinearRGB(pixel, 1);
|
|
396 |
}
|
|
397 |
float rgb[] = getDefaultRGBComponents(pixel);
|
|
398 |
return (int) (rgb[1] * 255.0f + 0.5f);
|
|
399 |
}
|
|
400 |
|
|
401 |
/**
|
|
402 |
* Returns the blue color component for the specified pixel, scaled
|
|
403 |
* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
|
|
404 |
* color conversion is done if necessary. The pixel value is specified
|
|
405 |
* as an <code>int</code>.
|
|
406 |
* The returned value is a non pre-multiplied value. Thus, if the
|
|
407 |
* alpha is premultiplied, this method divides it out before returning
|
|
408 |
* the value. If the alpha value is 0, for example, the blue value
|
|
409 |
* is 0.
|
|
410 |
* @param pixel the specified pixel
|
|
411 |
* @return the blue color component for the specified pixel, from
|
|
412 |
* 0 to 255 in the sRGB <code>ColorSpace</code>.
|
|
413 |
*/
|
|
414 |
final public int getBlue(int pixel) {
|
|
415 |
if (is_sRGB) {
|
|
416 |
return getsRGBComponentFromsRGB(pixel, 2);
|
|
417 |
} else if (is_LinearRGB) {
|
|
418 |
return getsRGBComponentFromLinearRGB(pixel, 2);
|
|
419 |
}
|
|
420 |
float rgb[] = getDefaultRGBComponents(pixel);
|
|
421 |
return (int) (rgb[2] * 255.0f + 0.5f);
|
|
422 |
}
|
|
423 |
|
|
424 |
/**
|
|
425 |
* Returns the alpha component for the specified pixel, scaled
|
|
426 |
* from 0 to 255. The pixel value is specified as an <code>int</code>.
|
|
427 |
* @param pixel the specified pixel
|
|
428 |
* @return the value of the alpha component of <code>pixel</code>
|
|
429 |
* from 0 to 255.
|
|
430 |
*/
|
|
431 |
final public int getAlpha(int pixel) {
|
|
432 |
if (!supportsAlpha) return 255;
|
|
433 |
int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
|
|
434 |
if (scaleFactors[3] != 1.0f) {
|
|
435 |
a = (int)(a * scaleFactors[3] + 0.5f);
|
|
436 |
}
|
|
437 |
return a;
|
|
438 |
}
|
|
439 |
|
|
440 |
/**
|
|
441 |
* Returns the color/alpha components of the pixel in the default
|
|
442 |
* RGB color model format. A color conversion is done if necessary.
|
|
443 |
* The pixel value is specified as an <code>int</code>.
|
|
444 |
* The returned value is in a non pre-multiplied format. Thus, if
|
|
445 |
* the alpha is premultiplied, this method divides it out of the
|
|
446 |
* color components. If the alpha value is 0, for example, the color
|
|
447 |
* values are each 0.
|
|
448 |
* @param pixel the specified pixel
|
|
449 |
* @return the RGB value of the color/alpha components of the specified
|
|
450 |
* pixel.
|
|
451 |
* @see ColorModel#getRGBdefault
|
|
452 |
*/
|
|
453 |
final public int getRGB(int pixel) {
|
|
454 |
if (is_sRGB || is_LinearRGB) {
|
|
455 |
return (getAlpha(pixel) << 24)
|
|
456 |
| (getRed(pixel) << 16)
|
|
457 |
| (getGreen(pixel) << 8)
|
|
458 |
| (getBlue(pixel) << 0);
|
|
459 |
}
|
|
460 |
float rgb[] = getDefaultRGBComponents(pixel);
|
|
461 |
return (getAlpha(pixel) << 24)
|
|
462 |
| (((int) (rgb[0] * 255.0f + 0.5f)) << 16)
|
|
463 |
| (((int) (rgb[1] * 255.0f + 0.5f)) << 8)
|
|
464 |
| (((int) (rgb[2] * 255.0f + 0.5f)) << 0);
|
|
465 |
}
|
|
466 |
|
|
467 |
/**
|
|
468 |
* Returns the red color component for the specified pixel, scaled
|
|
469 |
* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
|
|
470 |
* color conversion is done if necessary. The pixel value is specified
|
|
471 |
* by an array of data elements of type <code>transferType</code> passed
|
|
472 |
* in as an object reference.
|
|
473 |
* The returned value is a non pre-multiplied value. Thus, if the
|
|
474 |
* alpha is premultiplied, this method divides it out before returning
|
|
475 |
* the value. If the alpha value is 0, for example, the red value
|
|
476 |
* is 0.
|
|
477 |
* If <code>inData</code> is not a primitive array of type
|
|
478 |
* <code>transferType</code>, a <code>ClassCastException</code> is
|
|
479 |
* thrown. An <code>ArrayIndexOutOfBoundsException</code> is
|
|
480 |
* thrown if <code>inData</code> is not large enough to hold a
|
|
481 |
* pixel value for this <code>ColorModel</code>. Since
|
|
482 |
* <code>DirectColorModel</code> can be subclassed, subclasses inherit
|
|
483 |
* the implementation of this method and if they don't override it
|
|
484 |
* then they throw an exception if they use an unsupported
|
|
485 |
* <code>transferType</code>.
|
|
486 |
* An <code>UnsupportedOperationException</code> is thrown if this
|
|
487 |
* <code>transferType</code> is not supported by this
|
|
488 |
* <code>ColorModel</code>.
|
|
489 |
* @param inData the array containing the pixel value
|
|
490 |
* @return the value of the red component of the specified pixel.
|
|
491 |
* @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
|
|
492 |
* large enough to hold a pixel value for this color model
|
|
493 |
* @throws ClassCastException if <code>inData</code> is not a
|
|
494 |
* primitive array of type <code>transferType</code>
|
|
495 |
* @throws UnsupportedOperationException if this <code>transferType</code>
|
|
496 |
* is not supported by this color model
|
|
497 |
*/
|
|
498 |
public int getRed(Object inData) {
|
|
499 |
int pixel=0;
|
|
500 |
switch (transferType) {
|
|
501 |
case DataBuffer.TYPE_BYTE:
|
|
502 |
byte bdata[] = (byte[])inData;
|
|
503 |
pixel = bdata[0] & 0xff;
|
|
504 |
break;
|
|
505 |
case DataBuffer.TYPE_USHORT:
|
|
506 |
short sdata[] = (short[])inData;
|
|
507 |
pixel = sdata[0] & 0xffff;
|
|
508 |
break;
|
|
509 |
case DataBuffer.TYPE_INT:
|
|
510 |
int idata[] = (int[])inData;
|
|
511 |
pixel = idata[0];
|
|
512 |
break;
|
|
513 |
default:
|
|
514 |
throw new UnsupportedOperationException("This method has not been "+
|
|
515 |
"implemented for transferType " + transferType);
|
|
516 |
}
|
|
517 |
return getRed(pixel);
|
|
518 |
}
|
|
519 |
|
|
520 |
|
|
521 |
/**
|
|
522 |
* Returns the green color component for the specified pixel, scaled
|
|
523 |
* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
|
|
524 |
* color conversion is done if necessary. The pixel value is specified
|
|
525 |
* by an array of data elements of type <code>transferType</code> passed
|
|
526 |
* in as an object reference.
|
|
527 |
* The returned value is a non pre-multiplied value. Thus, if the
|
|
528 |
* alpha is premultiplied, this method divides it out before returning
|
|
529 |
* the value. If the alpha value is 0, for example, the green value
|
|
530 |
* is 0. If <code>inData</code> is not a primitive array of type
|
|
531 |
* <code>transferType</code>, a <code>ClassCastException</code> is thrown.
|
|
532 |
* An <code>ArrayIndexOutOfBoundsException</code> is
|
|
533 |
* thrown if <code>inData</code> is not large enough to hold a pixel
|
|
534 |
* value for this <code>ColorModel</code>. Since
|
|
535 |
* <code>DirectColorModel</code> can be subclassed, subclasses inherit
|
|
536 |
* the implementation of this method and if they don't override it
|
|
537 |
* then they throw an exception if they use an unsupported
|
|
538 |
* <code>transferType</code>.
|
|
539 |
* An <code>UnsupportedOperationException</code> is
|
|
540 |
* thrown if this <code>transferType</code> is not supported by this
|
|
541 |
* <code>ColorModel</code>.
|
|
542 |
* @param inData the array containing the pixel value
|
|
543 |
* @return the value of the green component of the specified pixel.
|
|
544 |
* @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
|
|
545 |
* large enough to hold a pixel value for this color model
|
|
546 |
* @throws ClassCastException if <code>inData</code> is not a
|
|
547 |
* primitive array of type <code>transferType</code>
|
|
548 |
* @throws UnsupportedOperationException if this <code>transferType</code>
|
|
549 |
* is not supported by this color model
|
|
550 |
*/
|
|
551 |
public int getGreen(Object inData) {
|
|
552 |
int pixel=0;
|
|
553 |
switch (transferType) {
|
|
554 |
case DataBuffer.TYPE_BYTE:
|
|
555 |
byte bdata[] = (byte[])inData;
|
|
556 |
pixel = bdata[0] & 0xff;
|
|
557 |
break;
|
|
558 |
case DataBuffer.TYPE_USHORT:
|
|
559 |
short sdata[] = (short[])inData;
|
|
560 |
pixel = sdata[0] & 0xffff;
|
|
561 |
break;
|
|
562 |
case DataBuffer.TYPE_INT:
|
|
563 |
int idata[] = (int[])inData;
|
|
564 |
pixel = idata[0];
|
|
565 |
break;
|
|
566 |
default:
|
|
567 |
throw new UnsupportedOperationException("This method has not been "+
|
|
568 |
"implemented for transferType " + transferType);
|
|
569 |
}
|
|
570 |
return getGreen(pixel);
|
|
571 |
}
|
|
572 |
|
|
573 |
|
|
574 |
/**
|
|
575 |
* Returns the blue color component for the specified pixel, scaled
|
|
576 |
* from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB. A
|
|
577 |
* color conversion is done if necessary. The pixel value is specified
|
|
578 |
* by an array of data elements of type <code>transferType</code> passed
|
|
579 |
* in as an object reference.
|
|
580 |
* The returned value is a non pre-multiplied value. Thus, if the
|
|
581 |
* alpha is premultiplied, this method divides it out before returning
|
|
582 |
* the value. If the alpha value is 0, for example, the blue value
|
|
583 |
* is 0. If <code>inData</code> is not a primitive array of type
|
|
584 |
* <code>transferType</code>, a <code>ClassCastException</code> is thrown.
|
|
585 |
* An <code>ArrayIndexOutOfBoundsException</code> is
|
|
586 |
* thrown if <code>inData</code> is not large enough to hold a pixel
|
|
587 |
* value for this <code>ColorModel</code>. Since
|
|
588 |
* <code>DirectColorModel</code> can be subclassed, subclasses inherit
|
|
589 |
* the implementation of this method and if they don't override it
|
|
590 |
* then they throw an exception if they use an unsupported
|
|
591 |
* <code>transferType</code>.
|
|
592 |
* An <code>UnsupportedOperationException</code> is
|
|
593 |
* thrown if this <code>transferType</code> is not supported by this
|
|
594 |
* <code>ColorModel</code>.
|
|
595 |
* @param inData the array containing the pixel value
|
|
596 |
* @return the value of the blue component of the specified pixel.
|
|
597 |
* @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
|
|
598 |
* large enough to hold a pixel value for this color model
|
|
599 |
* @throws ClassCastException if <code>inData</code> is not a
|
|
600 |
* primitive array of type <code>transferType</code>
|
|
601 |
* @throws UnsupportedOperationException if this <code>transferType</code>
|
|
602 |
* is not supported by this color model
|
|
603 |
*/
|
|
604 |
public int getBlue(Object inData) {
|
|
605 |
int pixel=0;
|
|
606 |
switch (transferType) {
|
|
607 |
case DataBuffer.TYPE_BYTE:
|
|
608 |
byte bdata[] = (byte[])inData;
|
|
609 |
pixel = bdata[0] & 0xff;
|
|
610 |
break;
|
|
611 |
case DataBuffer.TYPE_USHORT:
|
|
612 |
short sdata[] = (short[])inData;
|
|
613 |
pixel = sdata[0] & 0xffff;
|
|
614 |
break;
|
|
615 |
case DataBuffer.TYPE_INT:
|
|
616 |
int idata[] = (int[])inData;
|
|
617 |
pixel = idata[0];
|
|
618 |
break;
|
|
619 |
default:
|
|
620 |
throw new UnsupportedOperationException("This method has not been "+
|
|
621 |
"implemented for transferType " + transferType);
|
|
622 |
}
|
|
623 |
return getBlue(pixel);
|
|
624 |
}
|
|
625 |
|
|
626 |
/**
|
|
627 |
* Returns the alpha component for the specified pixel, scaled
|
|
628 |
* from 0 to 255. The pixel value is specified by an array of data
|
|
629 |
* elements of type <code>transferType</code> passed in as an object
|
|
630 |
* reference.
|
|
631 |
* If <code>inData</code> is not a primitive array of type
|
|
632 |
* <code>transferType</code>, a <code>ClassCastException</code> is
|
|
633 |
* thrown. An <code>ArrayIndexOutOfBoundsException</code> is
|
|
634 |
* thrown if <code>inData</code> is not large enough to hold a pixel
|
|
635 |
* value for this <code>ColorModel</code>. Since
|
|
636 |
* <code>DirectColorModel</code> can be subclassed, subclasses inherit
|
|
637 |
* the implementation of this method and if they don't override it
|
|
638 |
* then they throw an exception if they use an unsupported
|
|
639 |
* <code>transferType</code>.
|
|
640 |
* If this <code>transferType</code> is not supported, an
|
|
641 |
* <code>UnsupportedOperationException</code> is thrown.
|
|
642 |
* @param inData the specified pixel
|
|
643 |
* @return the alpha component of the specified pixel, scaled from
|
|
644 |
* 0 to 255.
|
19169
|
645 |
* @exception ClassCastException if <code>inData</code>
|
2
|
646 |
* is not a primitive array of type <code>transferType</code>
|
19169
|
647 |
* @exception ArrayIndexOutOfBoundsException if
|
2
|
648 |
* <code>inData</code> is not large enough to hold a pixel value
|
|
649 |
* for this <code>ColorModel</code>
|
19169
|
650 |
* @exception UnsupportedOperationException if this
|
2
|
651 |
* <code>tranferType</code> is not supported by this
|
|
652 |
* <code>ColorModel</code>
|
|
653 |
*/
|
|
654 |
public int getAlpha(Object inData) {
|
|
655 |
int pixel=0;
|
|
656 |
switch (transferType) {
|
|
657 |
case DataBuffer.TYPE_BYTE:
|
|
658 |
byte bdata[] = (byte[])inData;
|
|
659 |
pixel = bdata[0] & 0xff;
|
|
660 |
break;
|
|
661 |
case DataBuffer.TYPE_USHORT:
|
|
662 |
short sdata[] = (short[])inData;
|
|
663 |
pixel = sdata[0] & 0xffff;
|
|
664 |
break;
|
|
665 |
case DataBuffer.TYPE_INT:
|
|
666 |
int idata[] = (int[])inData;
|
|
667 |
pixel = idata[0];
|
|
668 |
break;
|
|
669 |
default:
|
|
670 |
throw new UnsupportedOperationException("This method has not been "+
|
|
671 |
"implemented for transferType " + transferType);
|
|
672 |
}
|
|
673 |
return getAlpha(pixel);
|
|
674 |
}
|
|
675 |
|
|
676 |
/**
|
|
677 |
* Returns the color/alpha components for the specified pixel in the
|
|
678 |
* default RGB color model format. A color conversion is done if
|
|
679 |
* necessary. The pixel value is specified by an array of data
|
|
680 |
* elements of type <code>transferType</code> passed in as an object
|
|
681 |
* reference. If <code>inData</code> is not a primitive array of type
|
|
682 |
* <code>transferType</code>, a <code>ClassCastException</code> is
|
|
683 |
* thrown. An <code>ArrayIndexOutOfBoundsException</code> is
|
|
684 |
* thrown if <code>inData</code> is not large enough to hold a pixel
|
|
685 |
* value for this <code>ColorModel</code>.
|
|
686 |
* The returned value is in a non pre-multiplied format. Thus, if
|
|
687 |
* the alpha is premultiplied, this method divides it out of the
|
|
688 |
* color components. If the alpha value is 0, for example, the color
|
|
689 |
* values is 0. Since <code>DirectColorModel</code> can be
|
|
690 |
* subclassed, subclasses inherit the implementation of this method
|
|
691 |
* and if they don't override it then
|
|
692 |
* they throw an exception if they use an unsupported
|
|
693 |
* <code>transferType</code>.
|
|
694 |
*
|
|
695 |
* @param inData the specified pixel
|
|
696 |
* @return the color and alpha components of the specified pixel.
|
|
697 |
* @exception UnsupportedOperationException if this
|
|
698 |
* <code>transferType</code> is not supported by this
|
|
699 |
* <code>ColorModel</code>
|
|
700 |
* @see ColorModel#getRGBdefault
|
|
701 |
*/
|
|
702 |
public int getRGB(Object inData) {
|
|
703 |
int pixel=0;
|
|
704 |
switch (transferType) {
|
|
705 |
case DataBuffer.TYPE_BYTE:
|
|
706 |
byte bdata[] = (byte[])inData;
|
|
707 |
pixel = bdata[0] & 0xff;
|
|
708 |
break;
|
|
709 |
case DataBuffer.TYPE_USHORT:
|
|
710 |
short sdata[] = (short[])inData;
|
|
711 |
pixel = sdata[0] & 0xffff;
|
|
712 |
break;
|
|
713 |
case DataBuffer.TYPE_INT:
|
|
714 |
int idata[] = (int[])inData;
|
|
715 |
pixel = idata[0];
|
|
716 |
break;
|
|
717 |
default:
|
|
718 |
throw new UnsupportedOperationException("This method has not been "+
|
|
719 |
"implemented for transferType " + transferType);
|
|
720 |
}
|
|
721 |
return getRGB(pixel);
|
|
722 |
}
|
|
723 |
|
|
724 |
/**
|
|
725 |
* Returns a data element array representation of a pixel in this
|
|
726 |
* <code>ColorModel</code>, given an integer pixel representation in the
|
|
727 |
* default RGB color model.
|
|
728 |
* This array can then be passed to the <code>setDataElements</code>
|
|
729 |
* method of a <code>WritableRaster</code> object. If the pixel variable
|
|
730 |
* is <code>null</code>, a new array is allocated. If <code>pixel</code>
|
|
731 |
* is not <code>null</code>, it must be a primitive array of type
|
|
732 |
* <code>transferType</code>; otherwise, a
|
|
733 |
* <code>ClassCastException</code> is thrown. An
|
|
734 |
* <code>ArrayIndexOutOfBoundsException</code> is
|
|
735 |
* thrown if <code>pixel</code> is not large enough to hold a pixel
|
|
736 |
* value for this <code>ColorModel</code>. The pixel array is returned.
|
|
737 |
* Since <code>DirectColorModel</code> can be subclassed, subclasses
|
|
738 |
* inherit the implementation of this method and if they don't
|
|
739 |
* override it then they throw an exception if they use an unsupported
|
|
740 |
* <code>transferType</code>.
|
|
741 |
*
|
|
742 |
* @param rgb the integer pixel representation in the default RGB
|
|
743 |
* color model
|
|
744 |
* @param pixel the specified pixel
|
|
745 |
* @return an array representation of the specified pixel in this
|
|
746 |
* <code>ColorModel</code>
|
|
747 |
* @exception ClassCastException if <code>pixel</code>
|
|
748 |
* is not a primitive array of type <code>transferType</code>
|
|
749 |
* @exception ArrayIndexOutOfBoundsException if
|
|
750 |
* <code>pixel</code> is not large enough to hold a pixel value
|
|
751 |
* for this <code>ColorModel</code>
|
|
752 |
* @exception UnsupportedOperationException if this
|
|
753 |
* <code>transferType</code> is not supported by this
|
|
754 |
* <code>ColorModel</code>
|
|
755 |
* @see WritableRaster#setDataElements
|
|
756 |
* @see SampleModel#setDataElements
|
|
757 |
*/
|
|
758 |
public Object getDataElements(int rgb, Object pixel) {
|
|
759 |
//REMIND: maybe more efficient not to use int array for
|
|
760 |
//DataBuffer.TYPE_USHORT and DataBuffer.TYPE_INT
|
|
761 |
int intpixel[] = null;
|
|
762 |
if (transferType == DataBuffer.TYPE_INT &&
|
|
763 |
pixel != null) {
|
|
764 |
intpixel = (int[])pixel;
|
|
765 |
intpixel[0] = 0;
|
|
766 |
} else {
|
|
767 |
intpixel = new int[1];
|
|
768 |
}
|
|
769 |
|
|
770 |
ColorModel defaultCM = ColorModel.getRGBdefault();
|
|
771 |
if (this == defaultCM || equals(defaultCM)) {
|
|
772 |
intpixel[0] = rgb;
|
|
773 |
return intpixel;
|
|
774 |
}
|
|
775 |
|
|
776 |
int red, grn, blu, alp;
|
|
777 |
red = (rgb>>16) & 0xff;
|
|
778 |
grn = (rgb>>8) & 0xff;
|
|
779 |
blu = rgb & 0xff;
|
|
780 |
if (is_sRGB || is_LinearRGB) {
|
|
781 |
int precision;
|
|
782 |
float factor;
|
|
783 |
if (is_LinearRGB) {
|
|
784 |
if (lRGBprecision == 8) {
|
|
785 |
red = fromsRGB8LUT8[red] & 0xff;
|
|
786 |
grn = fromsRGB8LUT8[grn] & 0xff;
|
|
787 |
blu = fromsRGB8LUT8[blu] & 0xff;
|
|
788 |
precision = 8;
|
|
789 |
factor = 1.0f / 255.0f;
|
|
790 |
} else {
|
|
791 |
red = fromsRGB8LUT16[red] & 0xffff;
|
|
792 |
grn = fromsRGB8LUT16[grn] & 0xffff;
|
|
793 |
blu = fromsRGB8LUT16[blu] & 0xffff;
|
|
794 |
precision = 16;
|
|
795 |
factor = 1.0f / 65535.0f;
|
|
796 |
}
|
|
797 |
} else {
|
|
798 |
precision = 8;
|
|
799 |
factor = 1.0f / 255.0f;
|
|
800 |
}
|
|
801 |
if (supportsAlpha) {
|
|
802 |
alp = (rgb>>24) & 0xff;
|
|
803 |
if (isAlphaPremultiplied) {
|
|
804 |
factor *= (alp * (1.0f / 255.0f));
|
|
805 |
precision = -1; // force component calculations below
|
|
806 |
}
|
|
807 |
if (nBits[3] != 8) {
|
|
808 |
alp = (int)
|
|
809 |
((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
|
|
810 |
if (alp > ((1<<nBits[3]) - 1)) {
|
|
811 |
// fix 4412670 - see comment below
|
|
812 |
alp = (1<<nBits[3]) - 1;
|
|
813 |
}
|
|
814 |
}
|
|
815 |
intpixel[0] = alp << maskOffsets[3];
|
|
816 |
}
|
|
817 |
if (nBits[0] != precision) {
|
|
818 |
red = (int) ((red * factor * ((1<<nBits[0]) - 1)) + 0.5f);
|
|
819 |
}
|
|
820 |
if (nBits[1] != precision) {
|
|
821 |
grn = (int) ((grn * factor * ((1<<nBits[1]) - 1)) + 0.5f);
|
|
822 |
}
|
|
823 |
if (nBits[2] != precision) {
|
|
824 |
blu = (int) ((blu * factor * ((1<<nBits[2]) - 1)) + 0.5f);
|
|
825 |
}
|
|
826 |
} else {
|
|
827 |
// Need to convert the color
|
|
828 |
float[] norm = new float[3];
|
|
829 |
float factor = 1.0f / 255.0f;
|
|
830 |
norm[0] = red * factor;
|
|
831 |
norm[1] = grn * factor;
|
|
832 |
norm[2] = blu * factor;
|
|
833 |
norm = colorSpace.fromRGB(norm);
|
|
834 |
if (supportsAlpha) {
|
|
835 |
alp = (rgb>>24) & 0xff;
|
|
836 |
if (isAlphaPremultiplied) {
|
|
837 |
factor *= alp;
|
|
838 |
for (int i = 0; i < 3; i++) {
|
|
839 |
norm[i] *= factor;
|
|
840 |
}
|
|
841 |
}
|
|
842 |
if (nBits[3] != 8) {
|
|
843 |
alp = (int)
|
|
844 |
((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
|
|
845 |
if (alp > ((1<<nBits[3]) - 1)) {
|
|
846 |
// fix 4412670 - see comment below
|
|
847 |
alp = (1<<nBits[3]) - 1;
|
|
848 |
}
|
|
849 |
}
|
|
850 |
intpixel[0] = alp << maskOffsets[3];
|
|
851 |
}
|
|
852 |
red = (int) ((norm[0] * ((1<<nBits[0]) - 1)) + 0.5f);
|
|
853 |
grn = (int) ((norm[1] * ((1<<nBits[1]) - 1)) + 0.5f);
|
|
854 |
blu = (int) ((norm[2] * ((1<<nBits[2]) - 1)) + 0.5f);
|
|
855 |
}
|
|
856 |
|
|
857 |
if (maxBits > 23) {
|
|
858 |
// fix 4412670 - for components of 24 or more bits
|
|
859 |
// some calculations done above with float precision
|
|
860 |
// may lose enough precision that the integer result
|
|
861 |
// overflows nBits, so we need to clamp.
|
|
862 |
if (red > ((1<<nBits[0]) - 1)) {
|
|
863 |
red = (1<<nBits[0]) - 1;
|
|
864 |
}
|
|
865 |
if (grn > ((1<<nBits[1]) - 1)) {
|
|
866 |
grn = (1<<nBits[1]) - 1;
|
|
867 |
}
|
|
868 |
if (blu > ((1<<nBits[2]) - 1)) {
|
|
869 |
blu = (1<<nBits[2]) - 1;
|
|
870 |
}
|
|
871 |
}
|
|
872 |
|
|
873 |
intpixel[0] |= (red << maskOffsets[0]) |
|
|
874 |
(grn << maskOffsets[1]) |
|
|
875 |
(blu << maskOffsets[2]);
|
|
876 |
|
|
877 |
switch (transferType) {
|
|
878 |
case DataBuffer.TYPE_BYTE: {
|
|
879 |
byte bdata[];
|
|
880 |
if (pixel == null) {
|
|
881 |
bdata = new byte[1];
|
|
882 |
} else {
|
|
883 |
bdata = (byte[])pixel;
|
|
884 |
}
|
|
885 |
bdata[0] = (byte)(0xff&intpixel[0]);
|
|
886 |
return bdata;
|
|
887 |
}
|
|
888 |
case DataBuffer.TYPE_USHORT:{
|
|
889 |
short sdata[];
|
|
890 |
if (pixel == null) {
|
|
891 |
sdata = new short[1];
|
|
892 |
} else {
|
|
893 |
sdata = (short[])pixel;
|
|
894 |
}
|
|
895 |
sdata[0] = (short)(intpixel[0]&0xffff);
|
|
896 |
return sdata;
|
|
897 |
}
|
|
898 |
case DataBuffer.TYPE_INT:
|
|
899 |
return intpixel;
|
|
900 |
}
|
|
901 |
throw new UnsupportedOperationException("This method has not been "+
|
|
902 |
"implemented for transferType " + transferType);
|
|
903 |
|
|
904 |
}
|
|
905 |
|
|
906 |
/**
|
|
907 |
* Returns an array of unnormalized color/alpha components given a pixel
|
|
908 |
* in this <code>ColorModel</code>. The pixel value is specified as an
|
|
909 |
* <code>int</code>. If the <code>components</code> array is
|
|
910 |
* <code>null</code>, a new array is allocated. The
|
|
911 |
* <code>components</code> array is returned. Color/alpha components are
|
|
912 |
* stored in the <code>components</code> array starting at
|
|
913 |
* <code>offset</code>, even if the array is allocated by this method.
|
|
914 |
* An <code>ArrayIndexOutOfBoundsException</code> is thrown if the
|
|
915 |
* <code>components</code> array is not <code>null</code> and is not large
|
|
916 |
* enough to hold all the color and alpha components, starting at
|
|
917 |
* <code>offset</code>.
|
|
918 |
* @param pixel the specified pixel
|
|
919 |
* @param components the array to receive the color and alpha
|
|
920 |
* components of the specified pixel
|
|
921 |
* @param offset the offset into the <code>components</code> array at
|
|
922 |
* which to start storing the color and alpha components
|
|
923 |
* @return an array containing the color and alpha components of the
|
|
924 |
* specified pixel starting at the specified offset.
|
|
925 |
*/
|
|
926 |
final public int[] getComponents(int pixel, int[] components, int offset) {
|
|
927 |
if (components == null) {
|
|
928 |
components = new int[offset+numComponents];
|
|
929 |
}
|
|
930 |
|
|
931 |
for (int i=0; i < numComponents; i++) {
|
|
932 |
components[offset+i] = (pixel & maskArray[i]) >>> maskOffsets[i];
|
|
933 |
}
|
|
934 |
|
|
935 |
return components;
|
|
936 |
}
|
|
937 |
|
|
938 |
/**
|
|
939 |
* Returns an array of unnormalized color/alpha components given a pixel
|
|
940 |
* in this <code>ColorModel</code>. The pixel value is specified by an
|
|
941 |
* array of data elements of type <code>transferType</code> passed in as
|
|
942 |
* an object reference. If <code>pixel</code> is not a primitive array
|
|
943 |
* of type <code>transferType</code>, a <code>ClassCastException</code>
|
|
944 |
* is thrown. An <code>ArrayIndexOutOfBoundsException</code> is
|
|
945 |
* thrown if <code>pixel</code> is not large enough to hold a
|
|
946 |
* pixel value for this <code>ColorModel</code>. If the
|
|
947 |
* <code>components</code> array is <code>null</code>, a new
|
|
948 |
* array is allocated. The <code>components</code> array is returned.
|
|
949 |
* Color/alpha components are stored in the <code>components</code> array
|
|
950 |
* starting at <code>offset</code>, even if the array is allocated by
|
|
951 |
* this method. An <code>ArrayIndexOutOfBoundsException</code>
|
|
952 |
* is thrown if the <code>components</code> array is not
|
|
953 |
* <code>null</code> and is not large enough to hold all the color and
|
|
954 |
* alpha components, starting at <code>offset</code>.
|
|
955 |
* Since <code>DirectColorModel</code> can be subclassed, subclasses
|
|
956 |
* inherit the implementation of this method and if they don't
|
|
957 |
* override it then they throw an exception if they use an unsupported
|
|
958 |
* <code>transferType</code>.
|
|
959 |
* @param pixel the specified pixel
|
|
960 |
* @param components the array to receive the color and alpha
|
|
961 |
* components of the specified pixel
|
|
962 |
* @param offset the offset into the <code>components</code> array at
|
|
963 |
* which to start storing the color and alpha components
|
|
964 |
* @return an array containing the color and alpha components of the
|
|
965 |
* specified pixel starting at the specified offset.
|
|
966 |
* @exception ClassCastException if <code>pixel</code>
|
|
967 |
* is not a primitive array of type <code>transferType</code>
|
|
968 |
* @exception ArrayIndexOutOfBoundsException if
|
|
969 |
* <code>pixel</code> is not large enough to hold a pixel value
|
|
970 |
* for this <code>ColorModel</code>, or if <code>components</code>
|
|
971 |
* is not <code>null</code> and is not large enough to hold all the
|
|
972 |
* color and alpha components, starting at <code>offset</code>
|
|
973 |
* @exception UnsupportedOperationException if this
|
|
974 |
* <code>transferType</code> is not supported by this
|
|
975 |
* color model
|
|
976 |
*/
|
|
977 |
final public int[] getComponents(Object pixel, int[] components,
|
|
978 |
int offset) {
|
|
979 |
int intpixel=0;
|
|
980 |
switch (transferType) {
|
|
981 |
case DataBuffer.TYPE_BYTE:
|
|
982 |
byte bdata[] = (byte[])pixel;
|
|
983 |
intpixel = bdata[0] & 0xff;
|
|
984 |
break;
|
|
985 |
case DataBuffer.TYPE_USHORT:
|
|
986 |
short sdata[] = (short[])pixel;
|
|
987 |
intpixel = sdata[0] & 0xffff;
|
|
988 |
break;
|
|
989 |
case DataBuffer.TYPE_INT:
|
|
990 |
int idata[] = (int[])pixel;
|
|
991 |
intpixel = idata[0];
|
|
992 |
break;
|
|
993 |
default:
|
|
994 |
throw new UnsupportedOperationException("This method has not been "+
|
|
995 |
"implemented for transferType " + transferType);
|
|
996 |
}
|
|
997 |
return getComponents(intpixel, components, offset);
|
|
998 |
}
|
|
999 |
|
|
1000 |
/**
|
|
1001 |
* Creates a <code>WritableRaster</code> with the specified width and
|
|
1002 |
* height that has a data layout (<code>SampleModel</code>) compatible
|
|
1003 |
* with this <code>ColorModel</code>.
|
|
1004 |
* @param w the width to apply to the new <code>WritableRaster</code>
|
|
1005 |
* @param h the height to apply to the new <code>WritableRaster</code>
|
|
1006 |
* @return a <code>WritableRaster</code> object with the specified
|
|
1007 |
* width and height.
|
|
1008 |
* @throws IllegalArgumentException if <code>w</code> or <code>h</code>
|
|
1009 |
* is less than or equal to zero
|
|
1010 |
* @see WritableRaster
|
|
1011 |
* @see SampleModel
|
|
1012 |
*/
|
|
1013 |
final public WritableRaster createCompatibleWritableRaster (int w,
|
|
1014 |
int h) {
|
|
1015 |
if ((w <= 0) || (h <= 0)) {
|
|
1016 |
throw new IllegalArgumentException("Width (" + w + ") and height (" + h +
|
|
1017 |
") cannot be <= 0");
|
|
1018 |
}
|
|
1019 |
int[] bandmasks;
|
|
1020 |
if (supportsAlpha) {
|
|
1021 |
bandmasks = new int[4];
|
|
1022 |
bandmasks[3] = alpha_mask;
|
|
1023 |
}
|
|
1024 |
else {
|
|
1025 |
bandmasks = new int[3];
|
|
1026 |
}
|
|
1027 |
bandmasks[0] = red_mask;
|
|
1028 |
bandmasks[1] = green_mask;
|
|
1029 |
bandmasks[2] = blue_mask;
|
|
1030 |
|
|
1031 |
if (pixel_bits > 16) {
|
|
1032 |
return Raster.createPackedRaster(DataBuffer.TYPE_INT,
|
|
1033 |
w,h,bandmasks,null);
|
|
1034 |
}
|
|
1035 |
else if (pixel_bits > 8) {
|
|
1036 |
return Raster.createPackedRaster(DataBuffer.TYPE_USHORT,
|
|
1037 |
w,h,bandmasks,null);
|
|
1038 |
}
|
|
1039 |
else {
|
|
1040 |
return Raster.createPackedRaster(DataBuffer.TYPE_BYTE,
|
|
1041 |
w,h,bandmasks,null);
|
|
1042 |
}
|
|
1043 |
}
|
|
1044 |
|
|
1045 |
/**
|
|
1046 |
* Returns a pixel value represented as an <code>int</code> in this
|
|
1047 |
* <code>ColorModel</code>, given an array of unnormalized color/alpha
|
|
1048 |
* components. An <code>ArrayIndexOutOfBoundsException</code> is
|
|
1049 |
* thrown if the <code>components</code> array is
|
|
1050 |
* not large enough to hold all the color and alpha components, starting
|
|
1051 |
* at <code>offset</code>.
|
|
1052 |
* @param components an array of unnormalized color and alpha
|
|
1053 |
* components
|
|
1054 |
* @param offset the index into <code>components</code> at which to
|
|
1055 |
* begin retrieving the color and alpha components
|
|
1056 |
* @return an <code>int</code> pixel value in this
|
|
1057 |
* <code>ColorModel</code> corresponding to the specified components.
|
19169
|
1058 |
* @exception ArrayIndexOutOfBoundsException if
|
2
|
1059 |
* the <code>components</code> array is not large enough to
|
|
1060 |
* hold all of the color and alpha components starting at
|
|
1061 |
* <code>offset</code>
|
|
1062 |
*/
|
|
1063 |
public int getDataElement(int[] components, int offset) {
|
|
1064 |
int pixel = 0;
|
|
1065 |
for (int i=0; i < numComponents; i++) {
|
|
1066 |
pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
|
|
1067 |
}
|
|
1068 |
return pixel;
|
|
1069 |
}
|
|
1070 |
|
|
1071 |
/**
|
|
1072 |
* Returns a data element array representation of a pixel in this
|
|
1073 |
* <code>ColorModel</code>, given an array of unnormalized color/alpha
|
|
1074 |
* components.
|
|
1075 |
* This array can then be passed to the <code>setDataElements</code>
|
|
1076 |
* method of a <code>WritableRaster</code> object.
|
|
1077 |
* An <code>ArrayIndexOutOfBoundsException</code> is thrown if the
|
|
1078 |
* <code>components</code> array
|
|
1079 |
* is not large enough to hold all the color and alpha components,
|
|
1080 |
* starting at offset. If the <code>obj</code> variable is
|
|
1081 |
* <code>null</code>, a new array is allocated. If <code>obj</code> is
|
|
1082 |
* not <code>null</code>, it must be a primitive array
|
|
1083 |
* of type <code>transferType</code>; otherwise, a
|
|
1084 |
* <code>ClassCastException</code> is thrown.
|
|
1085 |
* An <code>ArrayIndexOutOfBoundsException</code> is thrown if
|
|
1086 |
* <code>obj</code> is not large enough to hold a pixel value for this
|
|
1087 |
* <code>ColorModel</code>.
|
|
1088 |
* Since <code>DirectColorModel</code> can be subclassed, subclasses
|
|
1089 |
* inherit the implementation of this method and if they don't
|
|
1090 |
* override it then they throw an exception if they use an unsupported
|
|
1091 |
* <code>transferType</code>.
|
|
1092 |
* @param components an array of unnormalized color and alpha
|
|
1093 |
* components
|
|
1094 |
* @param offset the index into <code>components</code> at which to
|
|
1095 |
* begin retrieving color and alpha components
|
|
1096 |
* @param obj the <code>Object</code> representing an array of color
|
|
1097 |
* and alpha components
|
|
1098 |
* @return an <code>Object</code> representing an array of color and
|
|
1099 |
* alpha components.
|
19169
|
1100 |
* @exception ClassCastException if <code>obj</code>
|
2
|
1101 |
* is not a primitive array of type <code>transferType</code>
|
19169
|
1102 |
* @exception ArrayIndexOutOfBoundsException if
|
2
|
1103 |
* <code>obj</code> is not large enough to hold a pixel value
|
|
1104 |
* for this <code>ColorModel</code> or the <code>components</code>
|
|
1105 |
* array is not large enough to hold all of the color and alpha
|
|
1106 |
* components starting at <code>offset</code>
|
|
1107 |
* @exception UnsupportedOperationException if this
|
|
1108 |
* <code>transferType</code> is not supported by this
|
|
1109 |
* color model
|
|
1110 |
* @see WritableRaster#setDataElements
|
|
1111 |
* @see SampleModel#setDataElements
|
|
1112 |
*/
|
|
1113 |
public Object getDataElements(int[] components, int offset, Object obj) {
|
|
1114 |
int pixel = 0;
|
|
1115 |
for (int i=0; i < numComponents; i++) {
|
|
1116 |
pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
|
|
1117 |
}
|
|
1118 |
switch (transferType) {
|
|
1119 |
case DataBuffer.TYPE_BYTE:
|
|
1120 |
if (obj instanceof byte[]) {
|
|
1121 |
byte bdata[] = (byte[])obj;
|
|
1122 |
bdata[0] = (byte)(pixel&0xff);
|
|
1123 |
return bdata;
|
|
1124 |
} else {
|
|
1125 |
byte bdata[] = {(byte)(pixel&0xff)};
|
|
1126 |
return bdata;
|
|
1127 |
}
|
|
1128 |
case DataBuffer.TYPE_USHORT:
|
|
1129 |
if (obj instanceof short[]) {
|
|
1130 |
short sdata[] = (short[])obj;
|
|
1131 |
sdata[0] = (short)(pixel&0xffff);
|
|
1132 |
return sdata;
|
|
1133 |
} else {
|
|
1134 |
short sdata[] = {(short)(pixel&0xffff)};
|
|
1135 |
return sdata;
|
|
1136 |
}
|
|
1137 |
case DataBuffer.TYPE_INT:
|
|
1138 |
if (obj instanceof int[]) {
|
|
1139 |
int idata[] = (int[])obj;
|
|
1140 |
idata[0] = pixel;
|
|
1141 |
return idata;
|
|
1142 |
} else {
|
|
1143 |
int idata[] = {pixel};
|
|
1144 |
return idata;
|
|
1145 |
}
|
|
1146 |
default:
|
|
1147 |
throw new ClassCastException("This method has not been "+
|
|
1148 |
"implemented for transferType " + transferType);
|
|
1149 |
}
|
|
1150 |
}
|
|
1151 |
|
|
1152 |
/**
|
|
1153 |
* Forces the raster data to match the state specified in the
|
|
1154 |
* <code>isAlphaPremultiplied</code> variable, assuming the data is
|
|
1155 |
* currently correctly described by this <code>ColorModel</code>. It
|
|
1156 |
* may multiply or divide the color raster data by alpha, or do
|
|
1157 |
* nothing if the data is in the correct state. If the data needs to
|
|
1158 |
* be coerced, this method will also return an instance of this
|
|
1159 |
* <code>ColorModel</code> with the <code>isAlphaPremultiplied</code>
|
|
1160 |
* flag set appropriately. This method will throw a
|
|
1161 |
* <code>UnsupportedOperationException</code> if this transferType is
|
|
1162 |
* not supported by this <code>ColorModel</code>. Since
|
|
1163 |
* <code>ColorModel</code> can be subclassed, subclasses inherit the
|
|
1164 |
* implementation of this method and if they don't override it then
|
|
1165 |
* they throw an exception if they use an unsupported transferType.
|
|
1166 |
*
|
|
1167 |
* @param raster the <code>WritableRaster</code> data
|
|
1168 |
* @param isAlphaPremultiplied <code>true</code> if the alpha is
|
|
1169 |
* premultiplied; <code>false</code> otherwise
|
|
1170 |
* @return a <code>ColorModel</code> object that represents the
|
|
1171 |
* coerced data.
|
|
1172 |
* @exception UnsupportedOperationException if this
|
|
1173 |
* <code>transferType</code> is not supported by this
|
|
1174 |
* color model
|
|
1175 |
*/
|
|
1176 |
final public ColorModel coerceData (WritableRaster raster,
|
|
1177 |
boolean isAlphaPremultiplied)
|
|
1178 |
{
|
|
1179 |
if (!supportsAlpha ||
|
|
1180 |
this.isAlphaPremultiplied() == isAlphaPremultiplied) {
|
|
1181 |
return this;
|
|
1182 |
}
|
|
1183 |
|
|
1184 |
int w = raster.getWidth();
|
|
1185 |
int h = raster.getHeight();
|
|
1186 |
int aIdx = numColorComponents;
|
|
1187 |
float normAlpha;
|
|
1188 |
float alphaScale = 1.0f / ((float) ((1 << nBits[aIdx]) - 1));
|
|
1189 |
|
|
1190 |
int rminX = raster.getMinX();
|
|
1191 |
int rY = raster.getMinY();
|
|
1192 |
int rX;
|
|
1193 |
int pixel[] = null;
|
|
1194 |
int zpixel[] = null;
|
|
1195 |
|
|
1196 |
if (isAlphaPremultiplied) {
|
|
1197 |
// Must mean that we are currently not premultiplied so
|
|
1198 |
// multiply by alpha
|
|
1199 |
switch (transferType) {
|
|
1200 |
case DataBuffer.TYPE_BYTE: {
|
|
1201 |
for (int y = 0; y < h; y++, rY++) {
|
|
1202 |
rX = rminX;
|
|
1203 |
for (int x = 0; x < w; x++, rX++) {
|
|
1204 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1205 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1206 |
if (normAlpha != 0.f) {
|
|
1207 |
for (int c=0; c < aIdx; c++) {
|
|
1208 |
pixel[c] = (int) (pixel[c] * normAlpha +
|
|
1209 |
0.5f);
|
|
1210 |
}
|
|
1211 |
raster.setPixel(rX, rY, pixel);
|
|
1212 |
} else {
|
|
1213 |
if (zpixel == null) {
|
|
1214 |
zpixel = new int[numComponents];
|
|
1215 |
java.util.Arrays.fill(zpixel, 0);
|
|
1216 |
}
|
|
1217 |
raster.setPixel(rX, rY, zpixel);
|
|
1218 |
}
|
|
1219 |
}
|
|
1220 |
}
|
|
1221 |
}
|
|
1222 |
break;
|
|
1223 |
case DataBuffer.TYPE_USHORT: {
|
|
1224 |
for (int y = 0; y < h; y++, rY++) {
|
|
1225 |
rX = rminX;
|
|
1226 |
for (int x = 0; x < w; x++, rX++) {
|
|
1227 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1228 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1229 |
if (normAlpha != 0.f) {
|
|
1230 |
for (int c=0; c < aIdx; c++) {
|
|
1231 |
pixel[c] = (int) (pixel[c] * normAlpha +
|
|
1232 |
0.5f);
|
|
1233 |
}
|
|
1234 |
raster.setPixel(rX, rY, pixel);
|
|
1235 |
} else {
|
|
1236 |
if (zpixel == null) {
|
|
1237 |
zpixel = new int[numComponents];
|
|
1238 |
java.util.Arrays.fill(zpixel, 0);
|
|
1239 |
}
|
|
1240 |
raster.setPixel(rX, rY, zpixel);
|
|
1241 |
}
|
|
1242 |
}
|
|
1243 |
}
|
|
1244 |
}
|
|
1245 |
break;
|
|
1246 |
case DataBuffer.TYPE_INT: {
|
|
1247 |
for (int y = 0; y < h; y++, rY++) {
|
|
1248 |
rX = rminX;
|
|
1249 |
for (int x = 0; x < w; x++, rX++) {
|
|
1250 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1251 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1252 |
if (normAlpha != 0.f) {
|
|
1253 |
for (int c=0; c < aIdx; c++) {
|
|
1254 |
pixel[c] = (int) (pixel[c] * normAlpha +
|
|
1255 |
0.5f);
|
|
1256 |
}
|
|
1257 |
raster.setPixel(rX, rY, pixel);
|
|
1258 |
} else {
|
|
1259 |
if (zpixel == null) {
|
|
1260 |
zpixel = new int[numComponents];
|
|
1261 |
java.util.Arrays.fill(zpixel, 0);
|
|
1262 |
}
|
|
1263 |
raster.setPixel(rX, rY, zpixel);
|
|
1264 |
}
|
|
1265 |
}
|
|
1266 |
}
|
|
1267 |
}
|
|
1268 |
break;
|
|
1269 |
default:
|
|
1270 |
throw new UnsupportedOperationException("This method has not been "+
|
|
1271 |
"implemented for transferType " + transferType);
|
|
1272 |
}
|
|
1273 |
}
|
|
1274 |
else {
|
|
1275 |
// We are premultiplied and want to divide it out
|
|
1276 |
switch (transferType) {
|
|
1277 |
case DataBuffer.TYPE_BYTE: {
|
|
1278 |
for (int y = 0; y < h; y++, rY++) {
|
|
1279 |
rX = rminX;
|
|
1280 |
for (int x = 0; x < w; x++, rX++) {
|
|
1281 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1282 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1283 |
if (normAlpha != 0.0f) {
|
|
1284 |
float invAlpha = 1.0f / normAlpha;
|
|
1285 |
for (int c=0; c < aIdx; c++) {
|
|
1286 |
pixel[c] = (int) (pixel[c] * invAlpha +
|
|
1287 |
0.5f);
|
|
1288 |
}
|
|
1289 |
raster.setPixel(rX, rY, pixel);
|
|
1290 |
}
|
|
1291 |
}
|
|
1292 |
}
|
|
1293 |
}
|
|
1294 |
break;
|
|
1295 |
case DataBuffer.TYPE_USHORT: {
|
|
1296 |
for (int y = 0; y < h; y++, rY++) {
|
|
1297 |
rX = rminX;
|
|
1298 |
for (int x = 0; x < w; x++, rX++) {
|
|
1299 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1300 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1301 |
if (normAlpha != 0) {
|
|
1302 |
float invAlpha = 1.0f / normAlpha;
|
|
1303 |
for (int c=0; c < aIdx; c++) {
|
|
1304 |
pixel[c] = (int) (pixel[c] * invAlpha +
|
|
1305 |
0.5f);
|
|
1306 |
}
|
|
1307 |
raster.setPixel(rX, rY, pixel);
|
|
1308 |
}
|
|
1309 |
}
|
|
1310 |
}
|
|
1311 |
}
|
|
1312 |
break;
|
|
1313 |
case DataBuffer.TYPE_INT: {
|
|
1314 |
for (int y = 0; y < h; y++, rY++) {
|
|
1315 |
rX = rminX;
|
|
1316 |
for (int x = 0; x < w; x++, rX++) {
|
|
1317 |
pixel = raster.getPixel(rX, rY, pixel);
|
|
1318 |
normAlpha = pixel[aIdx] * alphaScale;
|
|
1319 |
if (normAlpha != 0) {
|
|
1320 |
float invAlpha = 1.0f / normAlpha;
|
|
1321 |
for (int c=0; c < aIdx; c++) {
|
|
1322 |
pixel[c] = (int) (pixel[c] * invAlpha +
|
|
1323 |
0.5f);
|
|
1324 |
}
|
|
1325 |
raster.setPixel(rX, rY, pixel);
|
|
1326 |
}
|
|
1327 |
}
|
|
1328 |
}
|
|
1329 |
}
|
|
1330 |
break;
|
|
1331 |
default:
|
|
1332 |
throw new UnsupportedOperationException("This method has not been "+
|
|
1333 |
"implemented for transferType " + transferType);
|
|
1334 |
}
|
|
1335 |
}
|
|
1336 |
|
|
1337 |
// Return a new color model
|
|
1338 |
return new DirectColorModel(colorSpace, pixel_bits, maskArray[0],
|
|
1339 |
maskArray[1], maskArray[2], maskArray[3],
|
|
1340 |
isAlphaPremultiplied,
|
|
1341 |
transferType);
|
|
1342 |
|
|
1343 |
}
|
|
1344 |
|
|
1345 |
/**
|
|
1346 |
* Returns <code>true</code> if <code>raster</code> is compatible
|
|
1347 |
* with this <code>ColorModel</code> and <code>false</code> if it is
|
|
1348 |
* not.
|
|
1349 |
* @param raster the {@link Raster} object to test for compatibility
|
|
1350 |
* @return <code>true</code> if <code>raster</code> is compatible
|
|
1351 |
* with this <code>ColorModel</code>; <code>false</code> otherwise.
|
|
1352 |
*/
|
|
1353 |
public boolean isCompatibleRaster(Raster raster) {
|
|
1354 |
SampleModel sm = raster.getSampleModel();
|
|
1355 |
SinglePixelPackedSampleModel spsm;
|
|
1356 |
if (sm instanceof SinglePixelPackedSampleModel) {
|
|
1357 |
spsm = (SinglePixelPackedSampleModel) sm;
|
|
1358 |
}
|
|
1359 |
else {
|
|
1360 |
return false;
|
|
1361 |
}
|
|
1362 |
if (spsm.getNumBands() != getNumComponents()) {
|
|
1363 |
return false;
|
|
1364 |
}
|
|
1365 |
|
|
1366 |
int[] bitMasks = spsm.getBitMasks();
|
|
1367 |
for (int i=0; i<numComponents; i++) {
|
|
1368 |
if (bitMasks[i] != maskArray[i]) {
|
|
1369 |
return false;
|
|
1370 |
}
|
|
1371 |
}
|
|
1372 |
|
|
1373 |
return (raster.getTransferType() == transferType);
|
|
1374 |
}
|
|
1375 |
|
|
1376 |
private void setFields() {
|
|
1377 |
// Set the private fields
|
|
1378 |
// REMIND: Get rid of these from the native code
|
|
1379 |
red_mask = maskArray[0];
|
|
1380 |
red_offset = maskOffsets[0];
|
|
1381 |
green_mask = maskArray[1];
|
|
1382 |
green_offset = maskOffsets[1];
|
|
1383 |
blue_mask = maskArray[2];
|
|
1384 |
blue_offset = maskOffsets[2];
|
|
1385 |
if (nBits[0] < 8) {
|
|
1386 |
red_scale = (1 << nBits[0]) - 1;
|
|
1387 |
}
|
|
1388 |
if (nBits[1] < 8) {
|
|
1389 |
green_scale = (1 << nBits[1]) - 1;
|
|
1390 |
}
|
|
1391 |
if (nBits[2] < 8) {
|
|
1392 |
blue_scale = (1 << nBits[2]) - 1;
|
|
1393 |
}
|
|
1394 |
if (supportsAlpha) {
|
|
1395 |
alpha_mask = maskArray[3];
|
|
1396 |
alpha_offset = maskOffsets[3];
|
|
1397 |
if (nBits[3] < 8) {
|
|
1398 |
alpha_scale = (1 << nBits[3]) - 1;
|
|
1399 |
}
|
|
1400 |
}
|
|
1401 |
}
|
|
1402 |
|
|
1403 |
/**
|
|
1404 |
* Returns a <code>String</code> that represents this
|
|
1405 |
* <code>DirectColorModel</code>.
|
|
1406 |
* @return a <code>String</code> representing this
|
|
1407 |
* <code>DirectColorModel</code>.
|
|
1408 |
*/
|
|
1409 |
public String toString() {
|
|
1410 |
return new String("DirectColorModel: rmask="
|
|
1411 |
+Integer.toHexString(red_mask)+" gmask="
|
|
1412 |
+Integer.toHexString(green_mask)+" bmask="
|
|
1413 |
+Integer.toHexString(blue_mask)+" amask="
|
|
1414 |
+Integer.toHexString(alpha_mask));
|
|
1415 |
}
|
|
1416 |
}
|