src/share/classes/com/sun/imageio/plugins/gif/GIFImageWriter.java

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   1 /*
   2  * Copyright (c) 2005, Oracle and/or its affiliates. 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


 340         if (inData == null) {
 341             throw new IllegalArgumentException("inData == null!");
 342         }
 343         if (imageType == null) {
 344             throw new IllegalArgumentException("imageType == null!");
 345         }
 346 
 347         GIFWritableImageMetadata im =
 348             (GIFWritableImageMetadata)getDefaultImageMetadata(imageType,
 349                                                               param);
 350 
 351         // Save interlace flag state.
 352 
 353         boolean isProgressive = im.interlaceFlag;
 354 
 355         convertMetadata(IMAGE_METADATA_NAME, inData, im);
 356 
 357         // Undo change to interlace flag if not MODE_COPY_FROM_METADATA.
 358 
 359         if (param != null && param.canWriteProgressive() &&
 360             param.getProgressiveMode() != param.MODE_COPY_FROM_METADATA) {
 361             im.interlaceFlag = isProgressive;
 362         }
 363 
 364         return im;
 365     }
 366 
 367     public void endWriteSequence() throws IOException {
 368         if (stream == null) {
 369             throw new IllegalStateException("output == null!");
 370         }
 371         if (!isWritingSequence) {
 372             throw new IllegalStateException("prepareWriteSequence() was not invoked!");
 373         }
 374         writeTrailer();
 375         resetLocal();
 376     }
 377 
 378     public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
 379                                                ImageWriteParam param) {
 380         GIFWritableImageMetadata imageMetadata =


   1 /*
   2  * Copyright (c) 2005, 2014, Oracle and/or its affiliates. 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


 340         if (inData == null) {
 341             throw new IllegalArgumentException("inData == null!");
 342         }
 343         if (imageType == null) {
 344             throw new IllegalArgumentException("imageType == null!");
 345         }
 346 
 347         GIFWritableImageMetadata im =
 348             (GIFWritableImageMetadata)getDefaultImageMetadata(imageType,
 349                                                               param);
 350 
 351         // Save interlace flag state.
 352 
 353         boolean isProgressive = im.interlaceFlag;
 354 
 355         convertMetadata(IMAGE_METADATA_NAME, inData, im);
 356 
 357         // Undo change to interlace flag if not MODE_COPY_FROM_METADATA.
 358 
 359         if (param != null && param.canWriteProgressive() &&
 360             param.getProgressiveMode() != ImageWriteParam.MODE_COPY_FROM_METADATA) {
 361             im.interlaceFlag = isProgressive;
 362         }
 363 
 364         return im;
 365     }
 366 
 367     public void endWriteSequence() throws IOException {
 368         if (stream == null) {
 369             throw new IllegalStateException("output == null!");
 370         }
 371         if (!isWritingSequence) {
 372             throw new IllegalStateException("prepareWriteSequence() was not invoked!");
 373         }
 374         writeTrailer();
 375         resetLocal();
 376     }
 377 
 378     public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
 379                                                ImageWriteParam param) {
 380         GIFWritableImageMetadata imageMetadata =