Source for gnu.javax.imageio.bmp.BMPImageReaderSpi

   1: /* BMPImageReaderSpi.java --
   2:    Copyright (C)  2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.javax.imageio.bmp;
  39: 
  40: import java.io.IOException;
  41: import java.util.Locale;
  42: import javax.imageio.ImageReader;
  43: import javax.imageio.spi.ImageReaderSpi;
  44: import javax.imageio.stream.ImageInputStream;
  45: 
  46: public class BMPImageReaderSpi extends ImageReaderSpi {
  47: 
  48:     static final String vendorName = "GNU";
  49:     static final String version = "0.1";
  50:     static final String readerClassName =
  51:         "gnu.javax.imageio.bmp.BMPImageReader";
  52:     static final String[] names = { "Microsoft Windows BMP" };
  53:     static final String[] suffixes = { ".bmp", ".bm" };
  54:     static final String[] MIMETypes = {
  55:         "image/bmp",
  56:         "image/x-windows-bmp"};
  57:     static final String[] writerSpiNames =
  58:     { "gnu.javax.imageio.bmp.BMPImageWriterSpi" };
  59: 
  60:     static final boolean supportsStandardStreamMetadataFormat = false;
  61:     static final String nativeStreamMetadataFormatName = null;
  62:     static final String nativeStreamMetadataFormatClassName = null;
  63:     static final String[] extraStreamMetadataFormatNames = null;
  64:     static final String[] extraStreamMetadataFormatClassNames = null;
  65:     static final boolean supportsStandardImageMetadataFormat = false;
  66:     static final String nativeImageMetadataFormatName = null;
  67:     static final String nativeImageMetadataFormatClassName = null;
  68:     static final String[] extraImageMetadataFormatNames = null;
  69:     static final String[] extraImageMetadataFormatClassNames = null;
  70: 
  71:     public BMPImageReaderSpi() {
  72:         super(vendorName, version,
  73:               names, suffixes, MIMETypes,
  74:               readerClassName,
  75:               STANDARD_INPUT_TYPE, // Accept ImageInputStreams
  76:               writerSpiNames,
  77:               supportsStandardStreamMetadataFormat,
  78:               nativeStreamMetadataFormatName,
  79:               nativeStreamMetadataFormatClassName,
  80:               extraStreamMetadataFormatNames,
  81:               extraStreamMetadataFormatClassNames,
  82:               supportsStandardImageMetadataFormat,
  83:               nativeImageMetadataFormatName,
  84:               nativeImageMetadataFormatClassName,
  85:               extraImageMetadataFormatNames,
  86:               extraImageMetadataFormatClassNames);
  87:     }
  88: 
  89:     public String getDescription(Locale locale) {
  90:         return "Microsoft BMP v3";
  91:     }
  92: 
  93:     public boolean canDecodeInput(Object input)
  94:         throws IOException {
  95:         if (!(input instanceof ImageInputStream))
  96:             return false;
  97: 
  98:         ImageInputStream in = (ImageInputStream)input;
  99:         boolean retval;
 100: 
 101:         in.mark();
 102:         try {
 103:             new BMPFileHeader(in);
 104:             retval = true;
 105:         } catch(BMPException e){
 106:             retval = false;
 107:         }
 108:         in.reset();
 109: 
 110:         return retval;
 111:     }
 112: 
 113:     public ImageReader createReaderInstance(Object extension) {
 114:         return new BMPImageReader(this);
 115:     }
 116: }