Java example source code file (LCMSImageLayout.java)
The LCMSImageLayout.java Java example source code
/*
* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* questions.
*/
package sun.java2d.cmm.lcms;
import java.awt.image.BufferedImage;
import java.awt.image.ComponentColorModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.SampleModel;
import sun.awt.image.ByteComponentRaster;
import sun.awt.image.ShortComponentRaster;
import sun.awt.image.IntegerComponentRaster;
class LCMSImageLayout {
public static int BYTES_SH(int x) {
return x;
}
public static int EXTRA_SH(int x) {
return x << 7;
}
public static int CHANNELS_SH(int x) {
return x << 3;
}
public static final int SWAPFIRST = 1 << 14;
public static final int DOSWAP = 1 << 10;
public static final int PT_RGB_8 =
CHANNELS_SH(3) | BYTES_SH(1);
public static final int PT_GRAY_8 =
CHANNELS_SH(1) | BYTES_SH(1);
public static final int PT_GRAY_16 =
CHANNELS_SH(1) | BYTES_SH(2);
public static final int PT_RGBA_8 =
EXTRA_SH(1) | CHANNELS_SH(3) | BYTES_SH(1);
public static final int PT_ARGB_8 =
EXTRA_SH(1) | CHANNELS_SH(3) | BYTES_SH(1) | SWAPFIRST;
public static final int PT_BGR_8 =
DOSWAP | CHANNELS_SH(3) | BYTES_SH(1);
public static final int PT_ABGR_8 =
DOSWAP | EXTRA_SH(1) | CHANNELS_SH(3) | BYTES_SH(1);
public static final int PT_BGRA_8 = EXTRA_SH(1) | CHANNELS_SH(3)
| BYTES_SH(1) | DOSWAP | SWAPFIRST;
public static final int DT_BYTE = 0;
public static final int DT_SHORT = 1;
public static final int DT_INT = 2;
public static final int DT_DOUBLE = 3;
boolean isIntPacked = false;
int pixelType;
int dataType;
int width;
int height;
int nextRowOffset;
private int nextPixelOffset;
int offset;
/* This flag indicates whether the image can be processed
* at once by doTransfrom() native call. Otherwise, the
* image is processed scan by scan.
*/
private boolean imageAtOnce = false;
Object dataArray;
private int dataArrayLength; /* in bytes */
private LCMSImageLayout(int np, int pixelType, int pixelSize)
throws ImageLayoutException
{
this.pixelType = pixelType;
width = np;
height = 1;
nextPixelOffset = pixelSize;
nextRowOffset = safeMult(pixelSize, np);
offset = 0;
}
private LCMSImageLayout(int width, int height, int pixelType,
int pixelSize)
throws ImageLayoutException
{
this.pixelType = pixelType;
this.width = width;
this.height = height;
nextPixelOffset = pixelSize;
nextRowOffset = safeMult(pixelSize, width);
offset = 0;
}
public LCMSImageLayout(byte[] data, int np, int pixelType, int pixelSize)
throws ImageLayoutException
{
this(np, pixelType, pixelSize);
dataType = DT_BYTE;
dataArray = data;
dataArrayLength = data.length;
verify();
}
public LCMSImageLayout(short[] data, int np, int pixelType, int pixelSize)
throws ImageLayoutException
{
this(np, pixelType, pixelSize);
dataType = DT_SHORT;
dataArray = data;
dataArrayLength = 2 * data.length;
verify();
}
public LCMSImageLayout(int[] data, int np, int pixelType, int pixelSize)
throws ImageLayoutException
{
this(np, pixelType, pixelSize);
dataType = DT_INT;
dataArray = data;
dataArrayLength = 4 * data.length;
verify();
}
public LCMSImageLayout(double[] data, int np, int pixelType, int pixelSize)
throws ImageLayoutException
{
this(np, pixelType, pixelSize);
dataType = DT_DOUBLE;
dataArray = data;
dataArrayLength = 8 * data.length;
verify();
}
private LCMSImageLayout() {
}
/* This method creates a layout object for given image.
* Returns null if the image is not supported by current implementation.
*/
public static LCMSImageLayout createImageLayout(BufferedImage image) throws ImageLayoutException {
LCMSImageLayout l = new LCMSImageLayout();
switch (image.getType()) {
case BufferedImage.TYPE_INT_RGB:
l.pixelType = PT_ARGB_8;
l.isIntPacked = true;
break;
case BufferedImage.TYPE_INT_ARGB:
l.pixelType = PT_ARGB_8;
l.isIntPacked = true;
break;
case BufferedImage.TYPE_INT_BGR:
l.pixelType = PT_ABGR_8;
l.isIntPacked = true;
break;
case BufferedImage.TYPE_3BYTE_BGR:
l.pixelType = PT_BGR_8;
break;
case BufferedImage.TYPE_4BYTE_ABGR:
l.pixelType = PT_ABGR_8;
break;
case BufferedImage.TYPE_BYTE_GRAY:
l.pixelType = PT_GRAY_8;
break;
case BufferedImage.TYPE_USHORT_GRAY:
l.pixelType = PT_GRAY_16;
break;
default:
/* ColorConvertOp creates component images as
* default destination, so this kind of images
* has to be supported.
*/
ColorModel cm = image.getColorModel();
if (cm instanceof ComponentColorModel) {
ComponentColorModel ccm = (ComponentColorModel) cm;
// verify whether the component size is fine
int[] cs = ccm.getComponentSize();
for (int s : cs) {
if (s != 8) {
return null;
}
}
return createImageLayout(image.getRaster());
}
return null;
}
l.width = image.getWidth();
l.height = image.getHeight();
switch (image.getType()) {
case BufferedImage.TYPE_INT_RGB:
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_BGR:
do {
IntegerComponentRaster intRaster = (IntegerComponentRaster)
image.getRaster();
l.nextRowOffset = safeMult(4, intRaster.getScanlineStride());
l.nextPixelOffset = safeMult(4, intRaster.getPixelStride());
l.offset = safeMult(4, intRaster.getDataOffset(0));
l.dataArray = intRaster.getDataStorage();
l.dataArrayLength = 4 * intRaster.getDataStorage().length;
l.dataType = DT_INT;
if (l.nextRowOffset == l.width * 4 * intRaster.getPixelStride()) {
l.imageAtOnce = true;
}
} while (false);
break;
case BufferedImage.TYPE_3BYTE_BGR:
case BufferedImage.TYPE_4BYTE_ABGR:
do {
ByteComponentRaster byteRaster = (ByteComponentRaster)
image.getRaster();
l.nextRowOffset = byteRaster.getScanlineStride();
l.nextPixelOffset = byteRaster.getPixelStride();
int firstBand = image.getSampleModel().getNumBands() - 1;
l.offset = byteRaster.getDataOffset(firstBand);
l.dataArray = byteRaster.getDataStorage();
l.dataArrayLength = byteRaster.getDataStorage().length;
l.dataType = DT_BYTE;
if (l.nextRowOffset == l.width * byteRaster.getPixelStride()) {
l.imageAtOnce = true;
}
} while (false);
break;
case BufferedImage.TYPE_BYTE_GRAY:
do {
ByteComponentRaster byteRaster = (ByteComponentRaster)
image.getRaster();
l.nextRowOffset = byteRaster.getScanlineStride();
l.nextPixelOffset = byteRaster.getPixelStride();
l.dataArrayLength = byteRaster.getDataStorage().length;
l.offset = byteRaster.getDataOffset(0);
l.dataArray = byteRaster.getDataStorage();
l.dataType = DT_BYTE;
if (l.nextRowOffset == l.width * byteRaster.getPixelStride()) {
l.imageAtOnce = true;
}
} while (false);
break;
case BufferedImage.TYPE_USHORT_GRAY:
do {
ShortComponentRaster shortRaster = (ShortComponentRaster)
image.getRaster();
l.nextRowOffset = safeMult(2, shortRaster.getScanlineStride());
l.nextPixelOffset = safeMult(2, shortRaster.getPixelStride());
l.offset = safeMult(2, shortRaster.getDataOffset(0));
l.dataArray = shortRaster.getDataStorage();
l.dataArrayLength = 2 * shortRaster.getDataStorage().length;
l.dataType = DT_SHORT;
if (l.nextRowOffset == l.width * 2 * shortRaster.getPixelStride()) {
l.imageAtOnce = true;
}
} while (false);
break;
default:
return null;
}
l.verify();
return l;
}
private static enum BandOrder {
DIRECT,
INVERTED,
ARBITRARY,
UNKNOWN;
public static BandOrder getBandOrder(int[] bandOffsets) {
BandOrder order = UNKNOWN;
int numBands = bandOffsets.length;
for (int i = 0; (order != ARBITRARY) && (i < bandOffsets.length); i++) {
switch (order) {
case UNKNOWN:
if (bandOffsets[i] == i) {
order = DIRECT;
} else if (bandOffsets[i] == (numBands - 1 - i)) {
order = INVERTED;
} else {
order = ARBITRARY;
}
break;
case DIRECT:
if (bandOffsets[i] != i) {
order = ARBITRARY;
}
break;
case INVERTED:
if (bandOffsets[i] != (numBands - 1 - i)) {
order = ARBITRARY;
}
break;
}
}
return order;
}
}
private void verify() throws ImageLayoutException {
if (offset < 0 || offset >= dataArrayLength) {
throw new ImageLayoutException("Invalid image layout");
}
if (nextPixelOffset != getBytesPerPixel(pixelType)) {
throw new ImageLayoutException("Invalid image layout");
}
int lastScanOffset = safeMult(nextRowOffset, (height - 1));
int lastPixelOffset = safeMult(nextPixelOffset, (width -1 ));
lastPixelOffset = safeAdd(lastPixelOffset, lastScanOffset);
int off = safeAdd(offset, lastPixelOffset);
if (off < 0 || off >= dataArrayLength) {
throw new ImageLayoutException("Invalid image layout");
}
}
static int safeAdd(int a, int b) throws ImageLayoutException {
long res = a;
res += b;
if (res < Integer.MIN_VALUE || res > Integer.MAX_VALUE) {
throw new ImageLayoutException("Invalid image layout");
}
return (int)res;
}
static int safeMult(int a, int b) throws ImageLayoutException {
long res = a;
res *= b;
if (res < Integer.MIN_VALUE || res > Integer.MAX_VALUE) {
throw new ImageLayoutException("Invalid image layout");
}
return (int)res;
}
public static class ImageLayoutException extends Exception {
public ImageLayoutException(String message) {
super(message);
}
}
public static LCMSImageLayout createImageLayout(Raster r) {
LCMSImageLayout l = new LCMSImageLayout();
if (r instanceof ByteComponentRaster) {
ByteComponentRaster br = (ByteComponentRaster)r;
ComponentSampleModel csm = (ComponentSampleModel)r.getSampleModel();
l.pixelType = CHANNELS_SH(br.getNumBands()) | BYTES_SH(1);
int[] bandOffsets = csm.getBandOffsets();
BandOrder order = BandOrder.getBandOrder(bandOffsets);
int firstBand = 0;
switch (order) {
case INVERTED:
l.pixelType |= DOSWAP;
firstBand = csm.getNumBands() - 1;
break;
case DIRECT:
// do nothing
break;
default:
// unable to create the image layout;
return null;
}
l.nextRowOffset = br.getScanlineStride();
l.nextPixelOffset = br.getPixelStride();
l.offset = br.getDataOffset(firstBand);
l.dataArray = br.getDataStorage();
l.dataType = DT_BYTE;
l.width = br.getWidth();
l.height = br.getHeight();
if (l.nextRowOffset == l.width * br.getPixelStride()) {
l.imageAtOnce = true;
}
return l;
}
return null;
}
/**
* Derives number of bytes per pixel from the pixel format.
* Following bit fields are used here:
* [0..2] - bytes per sample
* [3..6] - number of color samples per pixel
* [7..9] - number of non-color samples per pixel
*
* A complete description of the pixel format can be found
* here: lcms2.h, lines 651 - 667.
*
* @param pixelType pixel format in lcms2 notation.
* @return number of bytes per pixel for given pixel format.
*/
private static int getBytesPerPixel(int pixelType) {
int bytesPerSample = (0x7 & pixelType);
int colorSamplesPerPixel = 0xF & (pixelType >> 3);
int extraSamplesPerPixel = 0x7 & (pixelType >> 7);
return bytesPerSample * (colorSamplesPerPixel + extraSamplesPerPixel);
}
}
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