J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.image; |
| 27 | |
| 28 | import java.awt.geom.AffineTransform; |
| 29 | import java.awt.image.AffineTransformOp; |
| 30 | import java.awt.image.BufferedImage; |
| 31 | import java.awt.image.BufferedImageOp; |
| 32 | import java.awt.image.ByteLookupTable; |
| 33 | import java.awt.image.ConvolveOp; |
| 34 | import java.awt.image.Kernel; |
| 35 | import java.awt.image.LookupOp; |
| 36 | import java.awt.image.LookupTable; |
| 37 | import java.awt.image.RasterOp; |
| 38 | import java.awt.image.Raster; |
| 39 | import java.awt.image.WritableRaster; |
| 40 | import java.security.AccessController; |
| 41 | import java.security.PrivilegedAction; |
| 42 | |
| 43 | /** |
| 44 | * This class provides a hook to access platform-specific |
| 45 | * imaging code. |
| 46 | * |
| 47 | * If the implementing class cannot handle the op, tile format or |
| 48 | * image format, the method will return null; |
| 49 | * If there is an error when processing the |
| 50 | * data, the implementing class may either return null |
| 51 | * (in which case our java code will be executed) or may throw |
| 52 | * an exception. |
| 53 | */ |
| 54 | public class ImagingLib { |
| 55 | |
| 56 | static boolean useLib = true; |
| 57 | static boolean verbose = false; |
| 58 | |
| 59 | private static final int NUM_NATIVE_OPS = 3; |
| 60 | private static final int LOOKUP_OP = 0; |
| 61 | private static final int AFFINE_OP = 1; |
| 62 | private static final int CONVOLVE_OP = 2; |
| 63 | |
| 64 | private static Class[] nativeOpClass = new Class[NUM_NATIVE_OPS]; |
| 65 | |
| 66 | /** |
| 67 | * Returned value indicates whether the library initailization was |
| 68 | * succeded. |
| 69 | * |
| 70 | * There could be number of reasons to failure: |
| 71 | * - failed to load library. |
| 72 | * - failed to get all required entry points. |
| 73 | */ |
| 74 | private static native boolean init(); |
| 75 | |
| 76 | static public native int transformBI(BufferedImage src, BufferedImage dst, |
| 77 | double[] matrix, int interpType); |
| 78 | static public native int transformRaster(Raster src, Raster dst, |
| 79 | double[] matrix, |
| 80 | int interpType); |
| 81 | static public native int convolveBI(BufferedImage src, BufferedImage dst, |
| 82 | Kernel kernel, int edgeHint); |
| 83 | static public native int convolveRaster(Raster src, Raster dst, |
| 84 | Kernel kernel, int edgeHint); |
| 85 | static public native int lookupByteBI(BufferedImage src, BufferedImage dst, |
| 86 | byte[][] table); |
| 87 | static public native int lookupByteRaster(Raster src, Raster dst, |
| 88 | byte[][] table); |
| 89 | |
| 90 | static { |
| 91 | |
| 92 | PrivilegedAction<Boolean> doMlibInitialization = |
| 93 | new PrivilegedAction<Boolean>() { |
| 94 | public Boolean run() { |
| 95 | String arch = System.getProperty("os.arch"); |
| 96 | |
| 97 | if (arch == null || !arch.startsWith("sparc")) { |
| 98 | try { |
| 99 | System.loadLibrary("mlib_image"); |
| 100 | } catch (UnsatisfiedLinkError e) { |
| 101 | return Boolean.FALSE; |
| 102 | } |
| 103 | |
| 104 | } |
| 105 | boolean success = init(); |
| 106 | return Boolean.valueOf(success); |
| 107 | } |
| 108 | }; |
| 109 | |
| 110 | useLib = AccessController.doPrivileged(doMlibInitialization); |
| 111 | |
| 112 | // |
| 113 | // Cache the class references of the operations we know about |
| 114 | // at the time this class is initially loaded. |
| 115 | // |
| 116 | try { |
| 117 | nativeOpClass[LOOKUP_OP] = |
| 118 | Class.forName("java.awt.image.LookupOp"); |
| 119 | } catch (ClassNotFoundException e) { |
| 120 | System.err.println("Could not find class: "+e); |
| 121 | } |
| 122 | try { |
| 123 | nativeOpClass[AFFINE_OP] = |
| 124 | Class.forName("java.awt.image.AffineTransformOp"); |
| 125 | } catch (ClassNotFoundException e) { |
| 126 | System.err.println("Could not find class: "+e); |
| 127 | } |
| 128 | try { |
| 129 | nativeOpClass[CONVOLVE_OP] = |
| 130 | Class.forName("java.awt.image.ConvolveOp"); |
| 131 | } catch (ClassNotFoundException e) { |
| 132 | System.err.println("Could not find class: "+e); |
| 133 | } |
| 134 | |
| 135 | } |
| 136 | |
| 137 | private static int getNativeOpIndex(Class opClass) { |
| 138 | // |
| 139 | // Search for this class in cached list of |
| 140 | // classes supplying native acceleration |
| 141 | // |
| 142 | int opIndex = -1; |
| 143 | for (int i=0; i<NUM_NATIVE_OPS; i++) { |
| 144 | if (opClass == nativeOpClass[i]) { |
| 145 | opIndex = i; |
| 146 | break; |
| 147 | } |
| 148 | } |
| 149 | return opIndex; |
| 150 | } |
| 151 | |
| 152 | |
| 153 | public static WritableRaster filter(RasterOp op, Raster src, |
| 154 | WritableRaster dst) { |
| 155 | if (useLib == false) { |
| 156 | return null; |
| 157 | } |
| 158 | |
| 159 | // Create the destination tile |
| 160 | if (dst == null) { |
| 161 | dst = op.createCompatibleDestRaster(src); |
| 162 | } |
| 163 | |
| 164 | |
| 165 | WritableRaster retRaster = null; |
| 166 | switch (getNativeOpIndex(op.getClass())) { |
| 167 | |
| 168 | case LOOKUP_OP: |
| 169 | // REMIND: Fix this! |
| 170 | LookupTable table = ((LookupOp)op).getTable(); |
| 171 | if (table.getOffset() != 0) { |
| 172 | // Right now the native code doesn't support offsets |
| 173 | return null; |
| 174 | } |
| 175 | if (table instanceof ByteLookupTable) { |
| 176 | ByteLookupTable bt = (ByteLookupTable) table; |
| 177 | if (lookupByteRaster(src, dst, bt.getTable()) > 0) { |
| 178 | retRaster = dst; |
| 179 | } |
| 180 | } |
| 181 | break; |
| 182 | |
| 183 | case AFFINE_OP: |
| 184 | AffineTransformOp bOp = (AffineTransformOp) op; |
| 185 | double[] matrix = new double[6]; |
| 186 | bOp.getTransform().getMatrix(matrix); |
| 187 | if (transformRaster(src, dst, matrix, |
| 188 | bOp.getInterpolationType()) > 0) { |
| 189 | retRaster = dst; |
| 190 | } |
| 191 | break; |
| 192 | |
| 193 | case CONVOLVE_OP: |
| 194 | ConvolveOp cOp = (ConvolveOp) op; |
| 195 | if (convolveRaster(src, dst, |
| 196 | cOp.getKernel(), cOp.getEdgeCondition()) > 0) { |
| 197 | retRaster = dst; |
| 198 | } |
| 199 | break; |
| 200 | |
| 201 | default: |
| 202 | break; |
| 203 | } |
| 204 | |
| 205 | if (retRaster != null) { |
| 206 | SunWritableRaster.markDirty(retRaster); |
| 207 | } |
| 208 | |
| 209 | return retRaster; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | public static BufferedImage filter(BufferedImageOp op, BufferedImage src, |
| 214 | BufferedImage dst) |
| 215 | { |
| 216 | if (verbose) { |
| 217 | System.out.println("in filter and op is "+op |
| 218 | + "bufimage is "+src+" and "+dst); |
| 219 | } |
| 220 | |
| 221 | if (useLib == false) { |
| 222 | return null; |
| 223 | } |
| 224 | |
| 225 | // Create the destination image |
| 226 | if (dst == null) { |
| 227 | dst = op.createCompatibleDestImage(src, null); |
| 228 | } |
| 229 | |
| 230 | BufferedImage retBI = null; |
| 231 | switch (getNativeOpIndex(op.getClass())) { |
| 232 | |
| 233 | case LOOKUP_OP: |
| 234 | // REMIND: Fix this! |
| 235 | LookupTable table = ((LookupOp)op).getTable(); |
| 236 | if (table.getOffset() != 0) { |
| 237 | // Right now the native code doesn't support offsets |
| 238 | return null; |
| 239 | } |
| 240 | if (table instanceof ByteLookupTable) { |
| 241 | ByteLookupTable bt = (ByteLookupTable) table; |
| 242 | if (lookupByteBI(src, dst, bt.getTable()) > 0) { |
| 243 | retBI = dst; |
| 244 | } |
| 245 | } |
| 246 | break; |
| 247 | |
| 248 | case AFFINE_OP: |
| 249 | AffineTransformOp bOp = (AffineTransformOp) op; |
| 250 | double[] matrix = new double[6]; |
| 251 | AffineTransform xform = bOp.getTransform(); |
| 252 | bOp.getTransform().getMatrix(matrix); |
| 253 | |
| 254 | if (transformBI(src, dst, matrix, |
| 255 | bOp.getInterpolationType())>0) { |
| 256 | retBI = dst; |
| 257 | } |
| 258 | break; |
| 259 | |
| 260 | case CONVOLVE_OP: |
| 261 | ConvolveOp cOp = (ConvolveOp) op; |
| 262 | if (convolveBI(src, dst, cOp.getKernel(), |
| 263 | cOp.getEdgeCondition()) > 0) { |
| 264 | retBI = dst; |
| 265 | } |
| 266 | break; |
| 267 | |
| 268 | default: |
| 269 | break; |
| 270 | } |
| 271 | |
| 272 | if (retBI != null) { |
| 273 | SunWritableRaster.markDirty(retBI); |
| 274 | } |
| 275 | |
| 276 | return retBI; |
| 277 | } |
| 278 | } |