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* 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.
*
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package sun.awt.image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ByteLookupTable;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.awt.image.LookupOp;
import java.awt.image.LookupTable;
import java.awt.image.RasterOp;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* This class provides a hook to access platform-specific
* imaging code.
*
* If the implementing class cannot handle the op, tile format or
* image format, the method will return null;
* If there is an error when processing the
* data, the implementing class may either return null
* (in which case our java code will be executed) or may throw
* an exception.
*/
public class ImagingLib {
static boolean useLib = true;
static boolean verbose = false;
private static final int NUM_NATIVE_OPS = 3;
private static final int LOOKUP_OP = 0;
private static final int AFFINE_OP = 1;
private static final int CONVOLVE_OP = 2;
private static Class[] nativeOpClass = new Class[NUM_NATIVE_OPS];
/**
* Returned value indicates whether the library initailization was
* succeded.
*
* There could be number of reasons to failure:
* - failed to load library.
* - failed to get all required entry points.
*/
private static native boolean init();
static public native int transformBI(BufferedImage src, BufferedImage dst,
double[] matrix, int interpType);
static public native int transformRaster(Raster src, Raster dst,
double[] matrix,
int interpType);
static public native int convolveBI(BufferedImage src, BufferedImage dst,
Kernel kernel, int edgeHint);
static public native int convolveRaster(Raster src, Raster dst,
Kernel kernel, int edgeHint);
static public native int lookupByteBI(BufferedImage src, BufferedImage dst,
byte[][] table);
static public native int lookupByteRaster(Raster src, Raster dst,
byte[][] table);
static {
PrivilegedAction<Boolean> doMlibInitialization =
new PrivilegedAction<Boolean>() {
public Boolean run() {
String arch = System.getProperty("os.arch");
if (arch == null || !arch.startsWith("sparc")) {
try {
System.loadLibrary("mlib_image");
} catch (UnsatisfiedLinkError e) {
return Boolean.FALSE;
}
}
boolean success = init();
return Boolean.valueOf(success);
}
};
useLib = AccessController.doPrivileged(doMlibInitialization);
//
// Cache the class references of the operations we know about
// at the time this class is initially loaded.
//
try {
nativeOpClass[LOOKUP_OP] =
Class.forName("java.awt.image.LookupOp");
} catch (ClassNotFoundException e) {
System.err.println("Could not find class: "+e);
}
try {
nativeOpClass[AFFINE_OP] =
Class.forName("java.awt.image.AffineTransformOp");
} catch (ClassNotFoundException e) {
System.err.println("Could not find class: "+e);
}
try {
nativeOpClass[CONVOLVE_OP] =
Class.forName("java.awt.image.ConvolveOp");
} catch (ClassNotFoundException e) {
System.err.println("Could not find class: "+e);
}
}
private static int getNativeOpIndex(Class opClass) {
//
// Search for this class in cached list of
// classes supplying native acceleration
//
int opIndex = -1;
for (int i=0; i<NUM_NATIVE_OPS; i++) {
if (opClass == nativeOpClass[i]) {
opIndex = i;
break;
}
}
return opIndex;
}
public static WritableRaster filter(RasterOp op, Raster src,
WritableRaster dst) {
if (useLib == false) {
return null;
}
// Create the destination tile
if (dst == null) {
dst = op.createCompatibleDestRaster(src);
}
WritableRaster retRaster = null;
switch (getNativeOpIndex(op.getClass())) {
case LOOKUP_OP:
// REMIND: Fix this!
LookupTable table = ((LookupOp)op).getTable();
if (table.getOffset() != 0) {
// Right now the native code doesn't support offsets
return null;
}
if (table instanceof ByteLookupTable) {
ByteLookupTable bt = (ByteLookupTable) table;
if (lookupByteRaster(src, dst, bt.getTable()) > 0) {
retRaster = dst;
}
}
break;
case AFFINE_OP:
AffineTransformOp bOp = (AffineTransformOp) op;
double[] matrix = new double[6];
bOp.getTransform().getMatrix(matrix);
if (transformRaster(src, dst, matrix,
bOp.getInterpolationType()) > 0) {
retRaster = dst;
}
break;
case CONVOLVE_OP:
ConvolveOp cOp = (ConvolveOp) op;
if (convolveRaster(src, dst,
cOp.getKernel(), cOp.getEdgeCondition()) > 0) {
retRaster = dst;
}
break;
default:
break;
}
if (retRaster != null) {
SunWritableRaster.markDirty(retRaster);
}
return retRaster;
}
public static BufferedImage filter(BufferedImageOp op, BufferedImage src,
BufferedImage dst)
{
if (verbose) {
System.out.println("in filter and op is "+op
+ "bufimage is "+src+" and "+dst);
}
if (useLib == false) {
return null;
}
// Create the destination image
if (dst == null) {
dst = op.createCompatibleDestImage(src, null);
}
BufferedImage retBI = null;
switch (getNativeOpIndex(op.getClass())) {
case LOOKUP_OP:
// REMIND: Fix this!
LookupTable table = ((LookupOp)op).getTable();
if (table.getOffset() != 0) {
// Right now the native code doesn't support offsets
return null;
}
if (table instanceof ByteLookupTable) {
ByteLookupTable bt = (ByteLookupTable) table;
if (lookupByteBI(src, dst, bt.getTable()) > 0) {
retBI = dst;
}
}
break;
case AFFINE_OP:
AffineTransformOp bOp = (AffineTransformOp) op;
double[] matrix = new double[6];
AffineTransform xform = bOp.getTransform();
bOp.getTransform().getMatrix(matrix);
if (transformBI(src, dst, matrix,
bOp.getInterpolationType())>0) {
retBI = dst;
}
break;
case CONVOLVE_OP:
ConvolveOp cOp = (ConvolveOp) op;
if (convolveBI(src, dst, cOp.getKernel(),
cOp.getEdgeCondition()) > 0) {
retBI = dst;
}
break;
default:
break;
}
if (retBI != null) {
SunWritableRaster.markDirty(retBI);
}
return retBI;
}
}